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Technology Name
Briefcase
Scientist
1482
Modification of the electronic properties of layered-type semiconductors can be accomplished by doping/alloying of the semiconductor. In the present disclosure we show that doping of MoS2 and WS2 nanotubes/nanoparticles can be accomplished by doping with either Re (n-type) or Nb (p-type) foreign atoms...

Modification of the electronic properties of layered-type semiconductors can be accomplished by doping/alloying of the semiconductor. In the present disclosure we show that doping of MoS2 and WS2 nanotubes/nanoparticles can be accomplished by doping with either Re (n-type) or Nb (p-type) foreign atoms. These nanoparticles combine both superior mechanical properties and high electrical conductivity.

The main market for these kinds of nanoparticles is in thin films that combine superior mechanical and electrical properties. For example, as part of touch screensin addition, polymer nanocomposites containing such nanoparticles can be used among other things in electromagnetic shielding and conductive films for packaging and high performance adhesives. These nanoparticles are expected to reveal interesting catalytic applications, for example to obtain sulfur free gasoline. They can be used in third generation photovoltaic cells, etc.

Applications


  • Catalytic processes for energy storage and sulfur free gasoline.
  • Polymer nanocomposites for packaging
  • Electromagnetic shielding.
  • Conductive glues/adhesives with superior performance.
  • Energy storage.

Advantages


The combination of superior mechanical properties and high electrical conductivity offers new kinds of applications in catalysis; energy storage; high performance nanocomposites and in macroelectronics.

 

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  • Prof. Reshef Tenne
1407
Thermotolerant photosynthetic organisms endure worsening climate conditions such as increased temperatures and higher levels of CO2. These novel organisms maintain photosynthetic activity and growth under a wide temperature range (15-45oC) as opposed to their wild-type counterparts. Thermotolerant...

Thermotolerant photosynthetic organisms endure worsening climate conditions such as increased temperatures and higher levels of CO2. These novel organisms maintain photosynthetic activity and growth under a wide temperature range (15-45oC) as opposed to their wild-type counterparts.

Thermotolerant organisms also exhibit higher transparency to light. Photosynthetic efficiency is maintained even though they produce and utilize less chlorophyll molecules; therefore less surface area is required for optimal cultivation. Furthermore, increased CO2 concentrations are preferable for thermotolerant organisms’ efficient photosynthesis.

The innovative solution discovered at The Weizmann Institute, involves replacement of 1-2 amino acid residues in a protein motif within the D1 protein subunit of Photosystem II (the protein complex responsible for the conversion of solar energy to a useful form of energy by photosynthesis). Such a solution has the potential to provide platforms for food production and sustainable energy in regions with harsh climate conditions that until today, were deemed unfit for cultivation.

Applications


  • Bacterial platform to produce biomass or materials (e.g. nutraceuticals) in higher temperatures and higher CO2.
  • Food and biofuel production: adaptation of crops to harsh climates.

Advantages


  • Enhanced Thermal stability and plasticity of the modified organisms to a much broader range than observed for the native organisms.
  • Greater Light penetration (e.g. in ponds) without losing photosynthetic efficiency - thermotolerant organisms maintain efficient activity with less chlorophylls thus allowing greater transmission of light to deeper spaces.
  • Thermotolerant organisms withstand high CO2 concentrations.

Technology's Essence


Professor Avigdor Scherz and his team focused on the sequences of the two major protein subunits D1 and D2 found in all purple bacteria PSII reaction centers. Two sites, D1-209 and D1-212, were found to show consistent changes between mesophilic, thermotolerant and thermophilic organisms including cyanobacteria, algae and green plants.

The sites are positioned in a GXXXG-like structural motif (where G denotes small residues such as Gly, Ala, Ser, Cys and Thr) typical of helix-helix interactions. The motif was found at the points of closest contact between the two major protein subunits, D1 and D2. It was shown that mutations in the amino acids within the identified GXXXG-like motif  result in modification of the local flexibility of the reaction center and, consequently, in the induction of thermophilic behavior.

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  • Prof. Avigdor Scherz
1270
Monoclonal antibodies to IgE Description: Rat monoclonal anti-IgE antibodies that was generated by fusion of plasmacytoma (84.1C) or myeloma (EM953) cells with splenocytes of rat immunized with purified murine IgE mAb. The antibodies react with various IgE mAb of different specificities and not with...

Monoclonal antibodies to IgE

Description: Rat monoclonal anti-IgE antibodies that was generated by fusion of plasmacytoma (84.1C) or myeloma (EM953) cells with splenocytes of rat immunized with purified murine IgE mAb. The antibodies react with various IgE mAb of different specificities and not with immunoglobulins of other classes, and recognize an epitope on the murine Fc epsilon region.

Were shown to block IgE-Fc?R interactions and inhibit passive cutaneous anaphylaxis. 

Clone 84.1c recognizes a site on IgE, which is identical or very close to the Fc?R binding site. May be used for detection and manipulation of the IgE response in mice.

Reference:  Schwarzbaum S, Nissim A, Alkalay I, Ghozi MC, Schindler DG, Bergman Y, Eshhar Z. 1989. Mapping of murine IgE epitopes involved in IgE-Fc epsilon receptor interactions. Eur J Immunol 19(6):1015-23.

 

M182, M185, M186

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  • Prof. Zelig Eshhar
1529
We present an efficient and robust broadband crystal optical conversion device. Various applications of laser optics require tunable laser sources. Currently, most frequency conversion devices rely on a single non-linear crystal, which is either temperature or angle tuned to enhance efficiency. This...

We present an efficient and robust broadband crystal optical conversion device. Various applications of laser optics require tunable laser sources. Currently, most frequency conversion devices rely on a single non-linear crystal, which is either temperature or angle tuned to enhance efficiency. This results only in a narrow efficient spectral band of conversion. Other techniques such as periodic quasi-phase matching result in improved efficiencies but still within a narrow predetermined band. Random quasi-phase matching results in improved bandwidth but in a significant reduction in efficiency. This new device enables ultra-broadband wavelength conversion while maintaining high efficiency.

Applications


  • Laser optics industry
  • Frequency convertor for broadband signals
  • Generation of ultrafast visible radiation
  • Pulse selection.

Advantages


  • 90% efficiency of conversion process.
  • Simple and compact
  • Insensitive to the deviations in alignment, no dependence of the angle incidence beam or of temperature
  • Frequency converter of both broadband signals and ultra-short pulses.

Technology's Essence


This device is based on a new method of adiabatic wavelength conversion. The device works whereby a strong narrow-band pump is introduced into the crystal along with a weaker pulse to be converted. This conversion is realized in a quasi-phase matched nonlinear crystal, where the period is tuned adiabatically from strong negative phase-mismatch to strong positive phase-mismatch (or vice versa). This results in the efficient transformation of the weaker pulse.

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  • Prof. Yaron Silberberg
1184
Trace chemical or biological elements can be accurately detected and monitored in the field or at the point of care through use of this new quick, cost-effective platform technology based on a hybrid chemical-electronic detector. Analytes can be measured according to the electrical current changes they...

Trace chemical or biological elements can be accurately detected and monitored in the field or at the point of care through use of this new quick, cost-effective platform technology based on a hybrid chemical-electronic detector. Analytes can be measured according to the electrical current changes they induce with high specificity and accuracy at parts-per-billion (ppb) levels.

Applications


Transducer which may be developed to suite: Medical diagnostics: point of care, real time diagnostics of chemical and biological substances. Environmental watch: monitoring air or water pollution, testing for food poisoning. Chemical warfare: detection of chemical agents and explosives. Industry: monitoring industrial processes at real time.

Technology's Essence


Researchers at the Weizmann Institute have developed a platform technology based on novel hybrid chemical-electronic detector MOCSER (MOlecular Controlled SEmiconductor Resistor). The technology is based on a new type of a Gallium Arsenide (GaAs) electronic device covered with a monolayer of sensing molecules. The detection is achieved by measuring the current changes created due to analyte binding. The researchers have succeeded in showing high sensitivity and accuracy of the device down to parts per billion (ppb) levels. They have also demonstrated the possibility for broad applications of this detector by tailoring different sensing molecules on it and measuring various substances.

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  • Prof. Ron Naaman
  • Prof. David Cahen
1503
Application of Ureides-class compounds protects plants from stress related senescence, effectively extending the shelf-life of vegetables, fruit, leafy greens, cut branches and flowers. Plants suffer damage from factors such as oxidative stress, premature senescence and chlorophyll degradation. All of...

Application of Ureides-class compounds protects plants from stress related senescence, effectively extending the shelf-life of vegetables, fruit, leafy greens, cut branches and flowers.

Plants suffer damage from factors such as oxidative stress, premature senescence and chlorophyll degradation. All of the above can impact the freshness of produce from harvest to end-consumer. Researchers at the Weizmann Institute found that under certain stress conditions model plants produce Ureides, shown to have a protective role. Unexpectedly, this protection can also be achieved by the exogenous application to plants or plant parts post-harvest.

This innovative technique to preserve and prolong the shelf-life of fresh produce is clean, organic and cost-effective. In addition, engineered strains with altered Ureides metabolism can prove more resistant to stress related senescence.

Applications


  • Post-harvest protection of produce via
  • Exogenous application (spray on leaves, add to roots etc.).
  • Incorporation in packaging (e.g. embedded in plastic film).

Advantages


  • Treatment of both aging and light-deprivation in plants
  • Readily available and easily applied, does not require expertise to protect produce
  • Organic, clean, biodegradable materials.

Technology's Essence


Prof. Robert Fluhr and his team found that in wild-type plants conditions of extended darkness or increasing leaf age caused induction of transcripts related to purine catabolism, resulting in marked accumulation of Ureides. In contrast, Arabidopsis mutants of XDH, Atxdh1, accumulated the Ureides precursor (Xanthine) and showed premature senescence symptoms such as enhanced chlorophyll degradation, extensive cell death and upregulation of senescence-related transcripts.

The level of plant reactive oxygen species (ROS) and mortality can be attenuated by the addition of Ureides, suggesting that these metabolites can act as scavengers of ROS. The results highlighted that the regulation of Ureides levels by Atxdh1 has implications for optimal plant survival during nutrient remobilization, such as occurs during normal growth, dark stress and senescence.

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  • Prof. Robert Fluhr
1021
A method for mapping and correcting optical distortion conferred by live cell specimens in microscopy that cannot be overcome using optical techniques alone can be used both for light microscopy and confocal microscopy. The system determines the 3D refractive index for the samples, and provides a...

A method for mapping and correcting optical distortion conferred by live cell specimens in microscopy that cannot be overcome using optical techniques alone can be used both for light microscopy and confocal microscopy. The system determines the 3D refractive index for the samples, and provides a method for ray tracing, calculation of 3D space variant point spread, and generalized deconvolution.

Applications


Microscopy: The method was developed and applied for light microscopy, and is of critical importance for detection of weak fluorescently labeled molecules (like GFP fusion proteins) in live cells. It may be applicable also to confocal microscopy and other imaging methods like ultrasound, deep ocean sonar imaging, radioactive imaging, non-invasive deep tissue optical probing and photodynamic therapy. Gradient glasses: The determination of the three-dimensional refractive index of samples allows testing and optimization of techniques for production of gradient glasses. Recently continuous refractive index gradient glasses (GRIN, GRADIUM) were introduced, with applications in high quality optics, microlenses, aspherical lenses, plastic molded optics etc. Lenses built from such glasses can be aberration-corrected at a level, which required doublets and triplets using conventional glasses. Optimized performance of such optics requires ray tracing along curved path, as opposed to straight segments between surface borders of homogeneous glass lenses. Curved ray tracing is computation-intensive and dramatically slows down optimization of optical properties. Our algorithm for ray tracing in gradient refractive index eliminates this computational burden.

Technology's Essence


A computerized package to process three-dimensional images from live biological cells and tissues was developed in order to computationally correct specimen induced distortions that cannot be achieved by optical technique. The package includes: 1. Three-dimensional (3D) mapping of the refractive index of the specimen. 2. Fast method for ray tracing through gradient refractive index medium. 3. Three-dimensional space variant point spread function calculation. 4. Generalized three-dimensional deconvolution.

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  • Prof. Zvi Kam
1448
A method to produce amides in one step without any unwanted by-products, by coupling of alcohols with amines with the liberation of hydrogen gas, catalyzed by unique ruthenium complexes. Amides are widely used in the industry (e.g. nylon, Kevlar) and have widespread importance in biochemical and...

A method to produce amides in one step without any unwanted by-products, by coupling of alcohols with amines with the liberation of hydrogen gas, catalyzed by unique ruthenium complexes.

Amides are widely used in the industry (e.g. nylon, Kevlar) and have widespread importance in biochemical and chemical systems (e.g. proteins). Synthesis of amides is mostly based on activated acid derivatives or rearrangement reactions induced by an acid or base, which often produce toxic chemical waste and involve tedious procedures. Therefore, an efficient synthesis that avoids wasteful use of coupling reagents or corrosive acidic and basic media is highly desirable. The current technology allows for the clean production of amides from amines and alcohols.

Applications


  • Production of amides for various applications (plastic and rubber industry, paper industry, pharmaceutical intermediates, etc.)

  • Use of the liberated hydrogen (e.g. for the production of ammonia)


Advantages


  • Clean and selective procedure

  • Environment friendly reaction (no base or acid promoters are required, no carboxylic acid derivatives, such as acid chlorides, are needed)

  • Amides and molecular hydrogen are produced in high yields and high turnover numbers directly from alcohols in one step

  • The liberated hydrogen can be used for different applications

  • Formation of a variety of amides


Technology's Essence


Amide formation is a fundamental reaction in chemical synthesis. Amides are commonly formed from the reaction of a carboxylic acid derivative with an amine. Instead of using carboxylic acid derivative, in the present invention the amide motif is generated by direct acylation of amines with alcohols. This is possible through the use of a unique catalyst. This method enables the simple and elegant production of amide polymers and industrially important amides.

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  • Prof. David Milstein
1378
Researchers at the Weizmann Institute developed a novel method to design error-free DNA libraries from error-prone oligonucleotides. The system surpasses existing methods for de novo synthesis of DNA libraries in speed, precision, amenability to automation and ease of combining synthetic with natural...

Researchers at the Weizmann Institute developed a novel method to design error-free DNA libraries from error-prone oligonucleotides. The system surpasses existing methods for de novo synthesis of DNA libraries in speed, precision, amenability to automation and ease of combining synthetic with natural DNA fragments. 

All DNA construction protocols struggle with the cumbersome task of cloning and sequencing synthetic DNA fragments, seeking an error-free one. The problem is worsened for longer synthetic DNA which is more prone to errors. Time spent on error correction, clone selection and sequencing is a major bottleneck that prevents de novo DNA synthesis from becoming a routine procedure in labs. 

This innovative solution significantly decreases the need for labor-intensive time-consuming error correction methods, cloning and sequencing. Furthermore, efficient editing and reassembly of different genes is made possible due to a smart recursive reconstruction process.

 

Applications


  • Design and construction of synthetic biological molecules and organisms.
  • Construction of designer DNA libraries.

 


Advantages


  • Applicable in any lab with standard lab equipment. Faster and more precise than existing methods.
  • Amenable to automation, full synthesis in vitro with a modified smPCR protocol.
  • Very simple to combine synthetic and natural DNA fragments.
  • Does not require additional or external methods or reagents for error correction

 


Technology's Essence


Divide and Conquer (D&C), the quintessential recursive problem-solving technique, is applied in silico to divide the target DNA sequence into overlapping oligonucleotides short enough to be synthesized directly, albeit with errors; error-prone oligonucleotides are recursively combined in vitro, forming error-prone DNA molecules; error-free fragments of these molecules are then identified, extracted and used as new, typically longer and more accurate, inputs to another iteration of the recursive construction procedure; the entire process repeats until an error-free target molecule is formed.

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  • Prof. Ehud Y. Shapiro
1250
A robust method of identifying moving or changing objects in a video sequence groups each pixel with other adjacent pixels according to either motion or intensity values. Pixels are then repeatedly regrouped into clusters in a hierarchical manner. As these clusters are regrouped, the motion pattern is...

A robust method of identifying moving or changing objects in a video sequence groups each pixel with other adjacent pixels according to either motion or intensity values. Pixels are then repeatedly regrouped into clusters in a hierarchical manner. As these clusters are regrouped, the motion pattern is refined, until the full pattern is reached.

Applications


These methods for motion-based segmentation may be used in a multitude of applications that need to correctly identify meaningful regions in image sequences and compute their motion. Such applications include:

  1. Surveillance and homeland security - detecting changes, activities, objects.
  2. Medical Imaging - imaging of dynamic tissues.
  3. Quality control in manufacturing, and more.

Technology's Essence


Researchers at the Weizmann Institute of Science have developed a multiscale, motion-based segmentation method which, unlike previous methods, uses the inherent multiple scales of information in images. The method begins by measuring local optical flow at every picture elements (pixels). Then, using algebraic multigrid (AMG) techniques, it assembles together adjacent pixels which are similar in either their motion or intensity values into small aggregates - each pixel being allowed to belong to different aggregates with different weights. These aggregates in turn are assembled into larger aggregates, then still larger, etc., yielding eventually full segments.

As the aggregation process proceeds, the estimation of the motion of each aggregate is refined and ambiguities are resolved. In addition, an adaptive motion model is used to describe the motion of an aggregate, depending on the amount of flow information that is available within each aggregate. In particular, a translation model is used to describe the motion of pixels and small aggregates, switch to an affine model to describe the motion of intermediate sized aggregates, and finally turn to a perspective model to describe aggregates at the coarsest levels of scale. In addition to this, methods for identifying correspondences between aggregates in different images are also being developed. These methods are suitable for image sequences separated by fairly large motion.

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  • Prof. Ronen Ezra Basri
1507
One-step synthesis of primary amines from alcohols and ammonia under mild conditions.Amines are widely used in the production of numerous products for multiple industries and their use is expected to increase. Global amines market is expected to reach over $14 billion by 2020, with an average annual...

One-step synthesis of primary amines from alcohols and ammonia under mild conditions.
Amines are widely used in the production of numerous products for multiple industries and their use is expected to increase. Global amines market is expected to reach over $14 billion by 2020, with an average annual growth of 3.5%.
Primary amines are most useful in the larger markets of ethanolamines and fatty amines.
Current synthetic methods require harsh reaction conditions, are non-specific and generate toxic waste. The outlined technology utilizes a novel catalyst to synthesize primary amines in a simple single-step fashion directly from alcohols and ammonia.

Applications


• Production of primary amines for numerous industries (agrochemicals, surfactants, personal care, water treatment, fine chemicals, plastics, dyes, pigments, food additives and pharmaceuticals)

Advantages


  • Mild reaction conditions
  • Single step synthesis
  • High yields
  • No solvent required
  • No toxic reagents or by-products
  • Ecologically and economically beneficial

Technology's Essence


Amines are a very important family of compounds used in multiple industries. The presented technology uses selective catalytic synthesis of primary amines from primary alcohols and ammonia. This simple, one-step, easily applicable reaction delivers primary amines in good yields, in addition to valuable environmental and economic advantages.

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  • Prof. David Milstein
1102
A new high-yield method for producing aryl alkenes. Catalytic carbon-carbon bond formation by C-H activation is a topic of much current interest. Significant progress has been made in recent years in the development of synthetically useful catalytic addition of arenes to alkenes to give the saturated...

A new high-yield method for producing aryl alkenes. Catalytic carbon-carbon bond formation by C-H activation is a topic of much current interest. Significant progress has been made in recent years in the development of synthetically useful catalytic addition of arenes to alkenes to give the saturated aryl alkenes. Catalytic oxidative coupling to give aryl alkenes, in which the double bond is preserved, is a highly desirable goal. Such a reaction, which does not require the utilization of a reactive substituent and does not produce waste, may have an advantage over other methods for the preparation of aromatic alkenes. While good catalytic activity was achieved with some alkenes, acrylates resulted in low activity. Furthermore, the use of peroxide oxidants and acetic acid solvent in these systems is problematic from the industrial point of view. The present invention consists of a novel oxidative coupling of arenes with alkenes to yield aryl alkenes, in the presence of ruthenium or osmium compounds as catalysts.

Applications


  • Preparation of various aryl alkenes, which are useful intermediates in the chemical, pharmaceutical and agrochemical industries

Advantages


  • There is no need for acid solvent or a peroxide
  • Much lower pressure of CO may be used compared to other methods

Technology's Essence


In the outlined technology it was discovered that aryl alkenes can be produced by reaction of arenes with alkenes in the presence of ruthenium or osmium compounds as catalysts. The reaction can be carried out in the presence of molecular oxygen (O2) as the oxidant. In the absence of O2 the alkene itself serves as the oxidant. For example, reaction of benzene with methyl acrylate and O2 produces methyl cinnamate and water. In the absence of O2 methyl cinnamate and methyl propionate are formed.

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  • Prof. David Milstein
1461
Bidirectional Similarity offers a new approach to summarization of visual data (images and video) based on optimization of well defined similarity measure. Common visual summarization methods (mainly scaling and cropping) suffer from significant deficiencies related to image quality and loss of...

Bidirectional Similarity offers a new approach to summarization of visual data (images and video) based on optimization of well defined similarity measure.

Common visual summarization methods (mainly scaling and cropping) suffer from significant deficiencies related to image quality and loss of important data. Many attempts have been made to overcome these problems, however, success was very limited and neither has become commercially applicable.

Using an optimization problem approach and state-of-the-art algorithms, our method provides superior summarization of visual data as well as a measure to determine similarity, which together provides a basis for a wide range of applications in image and video processing.

Applications


The technology can be utilized in any application where an image size is changed or were similarity of images is important. Sample applications include:

  • Image processing software (as an added-on feature)

  • Resizing software

  • Creation of Thumbnails

  • Adjustment of images to different screen sizes (TV-cellular etc.)

  • Optimization of space-time patches in video processing

  • Image montages

  • Automatic image & video cropping

  • Images synthesis, photo reshuffling and many more


Advantages


While Bidirectional Similarity summarization will not replace existing technologies in all applications, it enjoys significant advantages that will offer better results in many of them. Among its advantages, the Bidirectional Similarity summarization:

  • Provides better resolution and in many cases reduces distortion compared to scaling
  • Reduces (or avoids) loss of important data compared to cropping
  • Allows importance-based summarization even when important information is widespread and hard to define
  • Uses quantitative objective similarity measure
  • Offers a generic tool for different image processing applications (synthesis, montage, reshuffling etc.)

Technology's Essence


Bidirectional Similarity Summarization is a patent-pending image and video processing method, which maximizes “completeness” and “coherence” between images and videos, using a measure for quantifying how “good” a visual summary is.

The algorithm uses and iterative process, gradually reducing the image size, while keeping all source patches in the target image, without introducing visual artifacts that are not in the input data. Using a Similarity Index, the algorithm identifies redundant information and compromise the “less important” data while generating the required target image or video.

The Similarity Index, which stands in the heart of the Bidirectional Similarity summarization algorithm, can be utilized by its own, as an objective function within other optimization processes, as well as in comparing the quality of visual summaries generated by different methods

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  • Prof. Michal Irani
1392
A catalytic based reaction for the treatment of industrial waste water. Millions of tons of organic chemical compounds - including solvents, petrochemicals, agrochemicals, and pharmaceuticals - are produced every year by a wide variety of chemical industries. Two immediate problems arise: 1. Industrial...

A catalytic based reaction for the treatment of industrial waste water. Millions of tons of organic chemical compounds - including solvents, petrochemicals, agrochemicals, and pharmaceuticals - are produced every year by a wide variety of chemical industries. Two immediate problems arise: 1. Industrial production of these chemicals and/or other products leads to effluent streams - highly toxic, contaminated aqueous solutions - from factories. These effluents must be treated prior to release of the water back into the environment. 2. Following use, these chemicals (e.g., agrochemicals, pharmaceuticals) become serious pollutants as they eventually find their way into the soil, sediment, and surface and/or groundwater environments. Current treatment methods are severely limited. Treatment of effluent streams by, e.g., filtration, photocatalysis, or bioreactors is often highly ineffective - the waste compounds not being easily captured, degraded or transformed - and/or prohibitively expensive.

Applications


  • Detoxification of industrial effluents, especially from petrochemical, agrochemical and pharmaceutical industries 
  • Waste water decontamination 
  • In situ and ex situ remediation of water polluted by organic and other contaminants

Advantages


  • Cost efficient
  • Quick

Technology's Essence


Researchers at the Weizmann Institute of Science have developed a new process for degradation and/or treatment of practically any organic contaminant in aqueous solutions under oxidizing (aerobic) conditions. A suite of catalytic materials has been developed which allows both in situ and ex situ remediation of polluted water by oxidative chemical degradation of contaminants. The technology eliminates or reduces a broad range of water pollutants - industrial organic solvents, petrochemicals, agrochemicals and pharmaceuticals (e.g., endocrine disruptors such as antiobiotics and hormones) - and is particularly effective for treating concentrated industrial effluents, under technically convenient conditions. The reaction products consist essentially of benign materials.

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  • Prof. Brian Berkowitz
1265
A Novel water treatment method capable of handling a wide spectrum of pollutants, both organic and metallic was developed by the group of Prof. Berkowitz and proven in large scale. The combination of ever-growing contamination from various sources (industry, agriculture and domestic uses), the toxicity...

A Novel water treatment method capable of handling a wide spectrum of pollutants, both organic and metallic was developed by the group of Prof. Berkowitz and proven in large scale.

The combination of ever-growing contamination from various sources (industry, agriculture and domestic uses), the toxicity of contaminating compounds, and their extreme persistence in the environment, define a complex challenge and serious threat. Feasible technological responses to deal with growing deterioration in water resource quality are difficult to develop, largely because of the wide variety of contaminants having different properties, the stringent environmental standards that must be met, and the inherent heterogeneity of natural aquatic systems. The quest for cost-effective, environmentally-acceptable methods that can target a wide spectrum of contaminants, in situ and ex situ, is urgent and critical today more than ever.

The approach of the technology presented here is to reduce their oxidation state, i.e., to transform them electrochemically. In most cases, complete transformation of contaminants from the oxidized-organic group produces environmentally innocuous compounds, while reduction of heavy metals renders them insoluble and immobile, and therefore much less harmful. These treatment methods can be applied both in situ and ex situ for decontamination of soils, sediments, water, wastewater and gaseous process streams.

Applications


•           Polluted water and wastewater treatment.

•           Soil decontamination.

•           Gaseous process stream treatment.


Advantages


•           Environmentally friendly output.

•           Cost effective.

•           Can be applied in situ as well as ex situ.


Technology's Essence


The treatment method presented here is based on nanosized zerovalent iron (nZVI) particles and cyanocobalamine (vitamin B12) on a diatomite matrix.  Cyanocobalamine is known to be an effective electron mediator, having strong synergistic effects with nZVI for reductive dehalogenation reactions. This composite material also improves the reducing capacity of nZVI by preventing agglomeration of iron nanoparticles, thus increasing their active surface area. The porous structure of the diatomite matrix allows

high hydraulic conductivity, which favors channeling of contaminated water to the reactive surface of the composite material resulting in faster rates of remediation. The composite material rapidly degrades or transforms completely a large spectrum of water contaminants, including halogenated solvents like TCE, PCE, and cis-DCE, pesticides like alachlor, atrazine and bromacyl, and common ions like nitrate, within minutes to hours.

 

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  • Prof. Brian Berkowitz

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