"Green chemistry reduces pollution at its source by minimizing or eliminating the hazards of chemical feedstocks, reagents, solvents, and products. "
What is your idea and what is new in this field?
Dear Dr. Parisa Ziarati , it is really an interesting issue for saving the environment of our world. Thank you very much for coming up with such a very useful point of discussion.
Green chemistry is the new and noble philosophy of chemistry, whose aim is to correct present practices in order to prevent problems in the future through its approaches and strategies of new sustainability priorities in technological and scientific innovation, on the basis of general rules stressing the need to abandon harmful products and processes that pollute the ecosystem.
According to the information obtained from (http://www.scienzagiovane.unibo.it/English/pollution/8-green-chemistry.html) , green chemistry strategically minimize pollution through :
Moreover , green chemistry innovations minimize environmental polluting via:
- Replacement of organic solvents with supercritical liquids.
- Replacement of brominated flame retardants.
- Replacement of non-selective persistent pesticides.
http://www.scienzagiovane.unibo.it/English/pollution/8-green-chemistry.html
https://www.linkedin.com/pulse/role-chemistry-prevent-environmental-pollution-mookhopadhayay/
Dear prof Parisa
I am so keen on sustainable way by reducing waste generation.
Thank you for all wise and essential questions, I am following!
Very interesting and important issue nowadays!
Thank you dear Dr Parisa
Hello,
Dear Dr. Parisa,
Thank you so much for your interesting, useful and applied question.
Thanks,
Dear Dr. Parisa,
I believe that finding new uses for waste could be a viable solution in line with the "green chemistry" approach.
Best regards,
Laura Bulgariu
It is a new expression which indicated to the less pollutants with less used chemicals like photochemistry, electrochemistry and using microwave technique in the organic compound preperation with using minimum amount of solvents (some drops).
Dear dr Parisa
Many thanks for this question, I find it very interesting and know that you are turning waste of foods and agricultural into bioadsorbents and cleaning up he contaminated soils and wastewater, Good Luck and appreciate your efforts!
Highest regards
Dear Dr. Parisa Ziarati , it is really an interesting issue for saving the environment of our world. Thank you very much for coming up with such a very useful point of discussion.
Green chemistry is the new and noble philosophy of chemistry, whose aim is to correct present practices in order to prevent problems in the future through its approaches and strategies of new sustainability priorities in technological and scientific innovation, on the basis of general rules stressing the need to abandon harmful products and processes that pollute the ecosystem.
According to the information obtained from (http://www.scienzagiovane.unibo.it/English/pollution/8-green-chemistry.html) , green chemistry strategically minimize pollution through :
Moreover , green chemistry innovations minimize environmental polluting via:
- Replacement of organic solvents with supercritical liquids.
- Replacement of brominated flame retardants.
- Replacement of non-selective persistent pesticides.
http://www.scienzagiovane.unibo.it/English/pollution/8-green-chemistry.html
https://www.linkedin.com/pulse/role-chemistry-prevent-environmental-pollution-mookhopadhayay/
Role of chemistry to prevent the Environmental pollution
https://www.linkedin.com/pulse/role-chemistry-prevent-environmental-pollution-mookhopadhayay/
Green chemistry is an approach that aims to eliminate the usage and generation of hazardous substances by designing better manufacturing processes for chemical products. Specifically, the goal of making the finished product and by-products less toxic directs the decisions made during chemical production. Aspects of the manufacturing process considered include the initial selection of chemicals, the mechanism of chemical synthesis, the end products of the process, and the management of toxic products generated during production. In addition to protecting the environment, green chemistry has the potential to benefit the large and diverse group of people whose job or residence places them at risk for exposure to toxic chemicals produced by manufacturing.
Good question @Parisa Ziarati
Thanks!
Green chemistry:
- Prevents pollution at the molecular level
- Is a philosophy that applies to all areas of chemistry, not a single discipline of chemistry
- Applies innovative scientific solutions to real-world environmental problems
- Results in source reduction because it prevents the generation of pollution
- Reduces the negative impacts of chemical products and processes on human health and the environment
- Lessens and sometimes eliminates hazard from existing products and processes
- Designs chemical products and processes to reduce their intrinsic hazards
Green chemistry's 12 principles
These principles demonstrate the breadth of the concept of green chemistry:
1. Prevent waste: Design chemical syntheses to prevent waste. Leave no waste to treat or clean up.
2. Maximize atom economy: Design syntheses so that the final product contains the maximum proportion of the starting materials. Waste few or no atoms.
3. Design less hazardous chemical syntheses: Design syntheses to use and generate substances with little or no toxicity to either humans or the environment.
4. Design safer chemicals and products: Design chemical products that are fully effective yet have little or no toxicity.
5. Use safer solvents and reaction conditions: Avoid using solvents, separation agents, or other auxiliary chemicals. If you must use these chemicals, use safer ones.
6. Increase energy efficiency: Run chemical reactions at room temperature and pressure whenever possible.
7. Use renewable feedstocks: Use starting materials (also known as feedstocks) that are renewable rather than depletable. The source of renewable feedstocks is often agricultural products or the wastes of other processes; the source of depletable feedstocks is often fossil fuels (petroleum, natural gas, or coal) or mining operations.
8. Avoid chemical derivatives: Avoid using blocking or protecting groups or any temporary modifications if possible. Derivatives use additional reagents and generate waste.
9. Use catalysts, not stoichiometric reagents: Minimize waste by using catalytic reactions. Catalysts are effective in small amounts and can carry out a single reaction many times. They are preferable to stoichiometric reagents, which are used in excess and carry out a reaction only once.
10. Design chemicals and products to degrade after use: Design chemical products to break down to innocuous substances after use so that they do not accumulate in the environment.
11. Analyze in real time to prevent pollution: Include in-process, real-time monitoring and control during syntheses to minimize or eliminate the formation of byproducts.
12. Minimize the potential for accidents: Design chemicals and their physical forms (solid, liquid, or gas) to minimize the potential for chemical accidents including explosions, fires, and releases to the environment.
https://www.epa.gov/greenchemistry/basics-green-chemistry
Dear Dr. Parisa, in my opinion Green Chemistry will be leading in the World as it cares for solving many medical problems with a less side effect and reducing the environmental pollution. Good luck
Green chemistry aims to minimise the environmental impact of the chemical industry. This includes shifting away from oil to renewable sources where possible.
Green chemistry also prioritises safety, improving energy efficiency and, most importantly, minimising (and ideally) eliminating toxic waste from the very beginning.
Important examples of green chemistry include: phasing out the use of chlorofluorocarbons (CFCs) in refrigerants, which have played a role in creating the ozone hole; developing more efficient ways of making pharmaceuticals, including the well-known painkiller ibuprofen and chemotherapy drug Taxol; and developing cheaper, more efficient solar cells.
For Further reading please follow the link:
http://theconversation.com/green-chemistry-is-key-to-reducing-waste-and-improving-sustainability-70740
Dear Dr. Parisa,
Green Chemistry is a vital field nowadays. As we should search for an alternative routes for the materials synthesis and application especially for Energy and wastewater treatment.
Article Sustainable Synthesis of High-Surface-Area Graphite Oxide vi...
Thank you all dears for your valuable answers!
According to my mother language wish you all be GREEN!
Green chemistry is a concept that has emerged in regulatory societies as a natural development of pollution prevention initiatives and aims to reduce emissions from chemical processes and eliminate the generation of hazardous substances. The field of green chemistry extends to energy conservation, waste reduction and life-cycle considerations such as the use of sustainable or renewable materials.
Green chemistry, also called sustainable chemistry, is an area of chemistry and chemical engineering focused on the designing of products and processes that minimize the use and generation of hazardous substances. Whereas environmental chemistry focuses on the effects of polluting chemicals on nature, green chemistry focuses on the environmental impact of chemistry, including technological approaches to preventing pollution and reducing consumption of nonrenewable resources.
regards
Where is meat in the sausages, where is wheat flour in bread? There are only pesticides in the vegetables, and we don't talk about water, milk, fish...Green chemistry can be only in the social countries. "Until man duplicates a blade of grass, nature can laugh at his so-called scientific knowledge. Remedies from chemicals will never stand in favour compared with the products of nature, the living cell of the plant, the final result of the rays of the sun, the mother of all life." - T. A. Edison and ”If people let the government decide what foods they eat and what medicines they take, their bodies will soon be in as sorry a state as are the souls who live under tyranny.”- Thomas Jefferson http://www.woodwifesjournal.com/p/inspiring-herbal-quotes.html
Wonderful thought and good approach to reduce waste generation..
The agro-ecological farming system is grounded in the idea that this practice will preserve the resources that allow us to meet our own needs, so that future generations can meet theirs too. This idea might seem too obvious to need stating, but its implications are far-reaching. If we are serious about sustainability, we cannot continue to farm in ways that deplete soil, pollute water, reduce biodiversity, and impoverish rural communities.
- Conversion of land from conventional farming practices to organic management (in terms of application of organic fertilizer, recommended dose of pesticides, insecticides)
- Management of the entire surrounding system to ensure biodiversity and sustainability of the system
- Crop production with the use of alternative sources of nutrients such as crop rotation, residue management, organic manures and biological inputs.
- Management of weeds and pests by better management practices, physical and cultural means and by biological control system like IPM which show how pesticide use can be reduced and pest management practices can be modified without yield penalties
Green extraction: Solvent free microwave extraction!
I have already developed this technique to extract essential oils
Dear Dr Salwa Bouabdallah
Very great job. Congratulation. Proud of you
Dr Parisa,
Good question, I am following it and learning...
want to be a good student.
Interesting theme. Only, unfortunately, gains more importance today for many companies and individuals.
I do not know much about this problem, but I know that in ancient times they have solved everyday problems, but with little chemistry.
Certainly there are alternatives to the use of various chemical agents. Maybe not short-term so effective, but in the long run it would give results ... the problem is what we all want now and immediately ...
This might be helpful
https://www.researchgate.net/publication/334163727_GREEN_CHEMISTRY_BEGINNING_RECENT_PROGRESS_AND_FUTURE_CHALLENGES
The growing development of green chemistry is due to the fact that ecofriendly processes are economic and environmental friendly on a long term. Frameworks of Twelve Principles are provided by green chemistry for scientists to use when designing any new processes, products, materials, and systems. The principles have demonstrated to be the basis of innovative solutions to various problems. Many of these principles, but not all, are applied successfully to green chemistry. The most commonly used principles in green analytical chemistry are are given below
1. Prevention
Prevention of waste is better than their treatment or cleans up after it has been produced. Waste product should be prevented before it is created or produced.
2. Atom Economy
Such type of synthetic methods should be conducted to increases the assimilation of all starting materials. Percent yield of chemical reactions should be increased. Incomplete chemical reactions should be prevented.
3. Less Toxic Chemical Synthesis
Wherever possible, synthetic methods should be designed to generate and use substances having less or no detrimental effect on human health and environment.
4. Safer Chemicals Designing
Designing of chemical products by maximizing their effect and increasing the desired function while reducing the toxicity.
5. Safer Auxiliaries
Auxiliary substances like solvents, catalyst, and separating agents, whenever possible should be made unnecessary and harmless.
6. Designing of Methods for Energy Efficiency
Energy supplies for chemical processes must be minimized as these processes possess their environmental and economic impacts. To reduce the environmental and economical effects, synthetic methods should be designed at ambient temperature and pressure.
7. Renewable Feedstock’s
A feedstock’s or raw materials should be renewable whenever practicable (technically or economically) rather than depleting (contributes no net CO2 to the atmosphere). Using biomass for the synthesis of nanomaterials and other chemical synthesis is an example of renewable feedstock.
8. Reduction of Derivatization
If possible unnecessary derivatization (protection/deprotection, use of blocking groups, and physical/chemical processes modification) should be avoided or minimized, because such steps in chemical reactions require extra secondary reagents and can produce waste.
9. Catalysis
Catalytic reagents are better than stoichiometric reagents and should be selective as much as possible.
10. Design for Degradation
Such type of chemical products should be designed so that at the end of their function they are biodegradable (break down into harmless final products) and do not persevere and persist in the environment.
11. Real-time or Instantaneous Analysis for Prevention of Pollution
Analytical methods are needed to be further developed that allows for real-time, control prior and in-process monitoring to the production of hazards material or toxic chemicals.
12. Intrinsically Safer use of Chemistry for Accident Prevention
Substances chosen for chemical process should possess minimum hazard for any chemical accidents, explosions, including releases, and fires.
Strategies to address the rising environmental anxiety with the current approaches include the use of ambient temperature and pressure synthesis, environmentally friendly solvents, uses of non-toxic chemicals and biodegradable polymers.
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