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The Use of Small Particle Catalysts in Pursuit of Green and Sustainable Chemistry
Published in Ahindra Nag, Greener Synthesis of Organic Compounds, Drugs and Natural Products, 2022
Synthetic chemistry ranges across a highly diverse field of applications.1,2 The petrochemical industry provides a separation and manufacturing capability which takes a highly complex mixture of organic molecules found in petroleum crude and synthesizes an extensive spectrum of materials ranging from low molecular weight gases to macromolecules.3 At a smaller scale, chemistry is used to synthesize products required for special applications such as pharmaceuticals, pesticides/fungicides, or fine chemicals. The process operations for these various chemical industry components have significant environmental footprints. Process emissions and significant waste streams become environmental hurdles that translate into economic burdens. The green chemistry perspective offers opportunities to reconsider how process chemistry and engineering can be utilized to mitigate these burdens. Twelve principles have been used to organize the green chemistry approach which identifies concerns such as safety, waste minimization, process efficiency, toxicity of materials, and energy consumption.4–6
Green Precipitation with Polysaccharide as a Tool for Enzyme Recovery
Published in Aidé Sáenz-Galindo, Adali Oliva Castañeda-Facio, Raúl Rodríguez-Herrera, Green Chemistry and Applications, 2020
Débora A. Campos, Ezequiel R. Coscueta, Maria Manuela Pintado
Green chemistry is the key to sustainable development. Green technologies are emerging as the best alternative due to their reduction in energy consumption, allowing the use of alternative resources and guaranteeing high quality and safe products. A process can be classified as a green process if integrated technologies allow the reduction of negative impacts on the environment, by reduction of water and energy requirements, as well as, reduction of processing time throughout the productions steps, which includes the downstream stage. As an example, natural enzyme isolation can be very difficult because usually it is present in a very low concentration and has to be separated from a complex biomass, requiring several stages in a process for enzyme separation and isolation, and is one of the crucial steps of precipitation. It is important to highlight that precipitation is a part of green chemistry, that is, using natural compounds as precipitants in sustainable conditions, we can refer to this methodology as “green precipitation”.
Nanocomposites: Recent Trends, Developments and Applications
Published in Mahmood Aliofkhazraei, Advances in Nanostructured Composites, 2019
Green materials are those which have biodegradable and renewable property. In similar fashion, if polymer is said to be green, it means it possesses environmentally favorable properties such as renewability and degradability. Green chemistry is the design of chemical products and processes that reduce or eliminate the use or generation of substances hazardous to humans, animals, plants, and the environment. Thus, green chemistry seeks to reduce and prevent pollution at its source. Natural polymers are almost green like biodegradable polymers (e.g., cellulose, chitin, starch, polyhydroxyalkanoates, polylactide, polycaprolactone, collagen and polypeptides). However, few microorganisms and enzymes capable of degrading green polymers have been identified (Kaplan et al. 1993, Chandra and Rustogi 1998). Figure 4 shows scheme of intercalated and exfoliated nanocomposite structure.
Eco-friendly based stability-indicating RP-HPLC technique for the determination of escitalopram and etizolam by employing QbD approach
Published in Green Chemistry Letters and Reviews, 2022
Durga Devi Perumal, Manikandan Krishnan, K.S. Lakshmi
Green chemistry involves the development of synthetic processes and products in which the use of hazardous compounds is reduced or eliminated. Environmentally friendly chemistry refers to every aspect of the chemical life cycle, including production, use, and disposal. Green chemicals either break down into harmless byproducts or are collected and reused. Plants and animals are affected by toxic substances in the environment owing to global climate change, ozone layer depletion, and smog generation (1, 2). Green analytical chemistry (GAC) focuses on creating analytical procedures that are both environmentally and analyst-friendly (3, 4). The GAC method has numerous benefits, such as reducing the use of dangerous chemicals and reagents, using equipment that uses less energy, and producing less waste.
Green and efficiently synthesized tetrasubstituted imidazole: introduced bismuth oxide co-doped Lu3+, Er3+ as a novel reusable heterogeneous nanocatalyst
Published in Inorganic and Nano-Metal Chemistry, 2021
Elmira Kohan, Mahdi Gholamhosseini-Nazari, Maryam Allahvirdinesbat, Abdol Ali Alemi
Green chemistry, an important term in modern-day’s chemical research, is the chemistry that provides us a new path to production of a desired product while minimizing the application and production of hazardous substances in the sustainable progress of future science and technologies. The use of green solvents like water shows both economical and synthetic advantages.[39,40] Ultrasonic-assisted organic synthesis as a green chemistry synthetic approach is a powerful technique which received significant attention in recent years to accelerate organic reactions.[41,42] Sonication of multicomponent reaction systems accelerates the reaction by confirming a better contact and increasing the reaction rate.[43]
Green chemistry & chemical stewardship certificate program: a novel, interdisciplinary approach to green chemistry and environmental health education
Published in Green Chemistry Letters and Reviews, 2019
Grace A. Lasker, Karolina E. Mellor, Nancy J. Simcox
Green chemistry is “the utilization of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture, and application of chemical products” (24). The purpose of this discipline is to allow for a focus on chemical design that reduces hazards, increases sustainability, and encourages a greener cradle to grave process for product development (25). The Green Chemistry & Chemical Stewardship Certificate Program (GC/CS Program) was developed with these frameworks as a guide for curriculum and outcome development. Students meet objectives not only related to industry and technical information, but focus on a systems thinking approach, which includes elements of business, public and environmental health, chemical safety assessment tools, and social and environmental justice along with green chemistry.