Biodegradability of Surfactants

Biodegradability of Surfactants
Author: D.R. Karsa
Publisher: Springer Science & Business Media
Total Pages: 278
Release: 1994-12-31
Genre: Technology & Engineering
ISBN: 0751402060

The awareness and development of 'biodegradable' surfactants pre-dates current pressures by the environmental movement by nearly three decades, wherein a responsible industry mutually agreed to replace 'hard', non-biodegradable com ponents of household detergents by 'soft', biodegradable alternatives, without course to legislation. The only requirement at that time was for surfactants used in detergents to exhibit a 'primary biodegradability' in excess of 80%; this referring to the disap pearance or removal from solution of the intact surface active material as de tected by specified analytical techniques. This proved useful, as observed environmental impacts of surfactants, e.g. visible foam on rivers, are associated with the intact molecule. Test methods for 'primary biodegradability' were eventually enshrined in EU legislation for nonionic surfactants (Directive 821242/EEC, amended 73/404IEEC) and for anionic surfactants (Directive 8212431EEC, amended 73/405IEEC). No approved test methods and resultant legislation have been developed for cationic and amphoteric surfactants to date. The environmental classification of chemical substances, which of course includes surfactants, and associated risk assessment utilises a second criterion 'ready biodegradability'. This may be assessed by a number of methods which monitor oxygen uptake (BOD), carbon dioxide production or removal of dis solved organic carbon (DOC). Some surfactants which comply with the above Detergents Directive are borderline when it comes to 'ready biodegradability'.

Biodegradation

Biodegradation
Author: Rolando Chamy
Publisher: BoD – Books on Demand
Total Pages: 382
Release: 2013-06-14
Genre: Technology & Engineering
ISBN: 953511154X

This book contains a collection of different biodegradation research activities where biological processes take place. The book has two main sections: A) Polymers and Surfactants Biodegradation and B) Biodegradation: Microbial Behaviour.

Surfactants from Renewable Resources

Surfactants from Renewable Resources
Author: Mikael Kjellin
Publisher: John Wiley & Sons
Total Pages: 336
Release: 2010-01-26
Genre: Science
ISBN: 9780470686614

Most modern surfactants are readily biodegradable and exhibit low toxicity in the aquatic environment, the two criteria for green surfactants. However the majority are synthesised from petroleum, so over the past decade the detergent industry has turned its attention to developing greener routes to create these surfactants via renewable building blocks. Surfactants from Renewable Resources presents the latest research and commercial applications in the emerging field of sustainable surfactant chemistry, with emphasis on production technology, surface chemical properties, biodegradability, ecotoxicity, market trends, economic viability and life-cycle analysis. Reviewing traditional sources for renewable surfactants as well as recent advances, this text focuses on techniques with potential for large scale application. Topics covered include: Renewable hydrophobes from natural fatty acids and forest industry by-products Renewable hydrophiles from carbohydrates, amino acids and lactic acid New ways of making renewable building blocks; ethylene from renewable resources and complex mixtures from waste biomass Biosurfactants Surface active polymers This book is a valuable resource for industrial researchers in companies that produce and use surfactants, as well as academic researchers in surface and polymer chemistry, sustainable chemistry and chemical engineering.

Biobased Surfactants

Biobased Surfactants
Author: Douglas G. Hayes
Publisher: Elsevier
Total Pages: 544
Release: 2019-04-30
Genre: Science
ISBN: 0128127066

Biobased Surfactants: Synthesis, Properties, and Applications, Second Edition, covers biosurfactant synthesis and applications and demonstrates how to reduce manufacturing and purification costs, impurities, and by-products. Fully updated, this book covers surfactants in biomedical applications, detergents, personal care, food, pharmaceuticals, cosmetics, and nanotechnology. It reflects on the latest developments in biobased surfactant science and provides case scenarios to guide readers in efficient and effective biobased surfactant application, along with strategies for research into new applications. This book is written from a biorefinery-based perspective by an international team of experts and acts as a key text for researchers and practitioners involved in the synthesis, utilization, and development of biobased surfactants. - Describes new and emerging biobased surfactants and their synthesis and development - Showcases an interdisciplinary approach to the topic, featuring applications to chemistry, biotechnology, biomedicine, and other areas - Presents the entire lifecycle of biobased surfactants in detail

Biodegradability of Surfactants

Biodegradability of Surfactants
Author: D.R. Karsa
Publisher: Springer Science & Business Media
Total Pages: 269
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 9401113483

The awareness and development of 'biodegradable' surfactants pre-dates current pressures by the environmental movement by nearly three decades, wherein a responsible industry mutually agreed to replace 'hard', non-biodegradable com ponents of household detergents by 'soft', biodegradable alternatives, without course to legislation. The only requirement at that time was for surfactants used in detergents to exhibit a 'primary biodegradability' in excess of 80%; this referring to the disap pearance or removal from solution of the intact surface active material as de tected by specified analytical techniques. This proved useful, as observed environmental impacts of surfactants, e.g. visible foam on rivers, are associated with the intact molecule. Test methods for 'primary biodegradability' were eventually enshrined in EU legislation for nonionic surfactants (Directive 821242/EEC, amended 73/404IEEC) and for anionic surfactants (Directive 8212431EEC, amended 73/405IEEC). No approved test methods and resultant legislation have been developed for cationic and amphoteric surfactants to date. The environmental classification of chemical substances, which of course includes surfactants, and associated risk assessment utilises a second criterion 'ready biodegradability'. This may be assessed by a number of methods which monitor oxygen uptake (BOD), carbon dioxide production or removal of dis solved organic carbon (DOC). Some surfactants which comply with the above Detergents Directive are borderline when it comes to 'ready biodegradability'.

Powdered Detergents

Powdered Detergents
Author: Michael Showell
Publisher: CRC Press
Total Pages: 376
Release: 1997-09-03
Genre: Science
ISBN: 9780824799885

Facilitating the development of important processes that yield increased detersive performance from smaller dosages, this work examines up-to-date and emerging process and chemical technologies used in the formulation of compact powdered detergents. It provides a survey of technological developments fundamental to powder compaction, such as the replacement of traditional phosphate builders and the introduction of insoluble zeolites as particle process aids.

Surfactants and Detergents

Surfactants and Detergents
Author: Ashim Dutta
Publisher: BoD – Books on Demand
Total Pages: 166
Release: 2022-09-28
Genre: Science
ISBN: 1839628960

Surfactants are ubiquitous and have applications in diverse areas, including food, cosmetics, detergents, lubricants, enhanced oil recovery (EOR), and targeted drug delivery systems. Their wide diversity of applications owes to their unique structure, namely, a hydrophilic and a hydrophobic group present in the same molecule. Although most surfactants used industrially are synthetic, there is a growing need for natural surfactants, as the latter is obtainable from renewable sources and are less toxic and highly biodegradable in contrast to their synthetic counterparts. This book is a compilation of interesting articles by various experts that cover various applications of both synthetic and natural surfactants.

Biosurfactants for a Sustainable Future

Biosurfactants for a Sustainable Future
Author: Hemen Sarma
Publisher: John Wiley & Sons
Total Pages: 556
Release: 2021-04-19
Genre: Technology & Engineering
ISBN: 1119671000

Biosurfactants for a Sustainable Future Explore the state-of-the-art in biosurfactant technology and its applications in environmental remediation, biomedicine, and biotechnology Biosurfactants for a Sustainable Future explores recent developments in biosurfactants and their use in a variety of cutting-edge applications. The book opens a window on the rapid development of microbiology by explaining how microbes and their products are used in advanced medical technology and in the sustainable remediation of emerging environmental contaminants. The book emphasizes the different techniques that are used for the production of biosurfactants from microorganisms and their characterization. Various aspects of biosurfactants, including structural characteristics, developments, production, bio-economics and their sustainable use in the environment and biomedicine, are addressed, and the book also presents metagenomic strategies to facilitate the discovery of novel biosurfactants producing microorganisms. Readers will benefit from the inclusion of: A thorough introduction to the state-of-the-art in biosurfactant technology, techniques, and applications An exploration of biosurfactant enhanced remediation of sediments contaminated with organics and inorganics A discussion of perspectives for biomedical and biotechnological applications of biosurfactants A review of the antiviral, antimicrobial, and antibiofilm potential of biosurfactants against multi-drug-resistant pathogens. An examination of biosurfactant-inspired control of methicillin-resistant Staphylococcus aureus Perfect for academic researchers and scientists working in the petrochemical industry, pharmaceutical industry, and in the agroindustry, Biosurfactants for a Sustainable Future will also earn a place in the libraries of scientists working in environmental biotechnology, environmental science, and biomedical engineering.

The Role of Colloidal Systems in Environmental Protection

The Role of Colloidal Systems in Environmental Protection
Author: Monzer Fanun
Publisher: Elsevier
Total Pages: 715
Release: 2014-02-08
Genre: Science
ISBN: 0444632840

The Role of Colloidal Systems in Environmental Protection describes the importance of colloids in many applications that contribute to environmental protection, including drinking water and wastewater treatment, heavy metal remediation, treatment of radioactive materials, corrosion, and energy conversion. Knowledge of the physical and chemical composition of colloids is important to understand and accurately model the relevant processes. The book familiarizes the reader with the technological features of the application of colloids in environmental protection, and provides chemical engineers, researchers, and scientists in academic and corporate communities with the latest developments in this field. Each chapter covers the whole spectrum of the relevant science, from the fundamentals to applications. - Provides the applied technological features of colloids in environmental protection - Gives insight into the use of bio-solid colloids as contaminant carriers - Covers the natural occurrence of biosurfactants in the environment and their applications - Provides information on the use of nanoparticles for environmental applications - Chapters written by recognized and respected experts in the field from all over the world