Fate, behavior and effects of surfactants and their degradation products in the environment

Environment International, Год журнала: 2005, Номер 32(3), С. 417 - 431

Опубликована: Авг. 26, 2005

Язык: Английский

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2 Surfactants and their applications

Annual Reports Section C (Physical Chemistry), Год журнала: 2003, Номер 99, С. 3 - 48

Опубликована: Янв. 1, 2003

Surfactants form a unique class of chemical compounds. This review provides an introduction to the nature and physical properties surfactants, emphasizing their ability radically alter surface interfacial self-associate solubilize themselves in micelles. These provide means apply surfactants wettability modification, detergency, displacement liquid phases through porous media on one hand, stabilize dispersions (including foams, froths emulsions), or destabilize (again including foams emulsions) other hand. turn lead vast array practical application areas which are illustrated terms mineral petroleum processing, biological systems, health personal care products, foods, crop protection.

Язык: Английский

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Constructed wetlands for treatment of industrial wastewaters: A review

Ecological Engineering, Год журнала: 2014, Номер 73, С. 724 - 751

Опубликована: Окт. 17, 2014

Язык: Английский

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Biodegradable ionic liquids: Part I. Concept, preliminary targets and evaluation

Green Chemistry, Год журнала: 2004, Номер 6(3), С. 166 - 166

Опубликована: Янв. 1, 2004

The design, preparation and evaluation of biodegradable ionic liquids containing ester or amide groups in the alkyl side chain are presented. Factors improving biodegradation surfactants were successfully applied to liquids. These novel can be prepared from readily available starting materials high yield. introduction a group susceptible enzymatic hydrolysis greatly improves (OECD 301D 'Closed Bottle Test') compared with commonly used dialkylimidazolium liquids, bmimBF4 bmimPF6. For 3-methyl-1-(alkyloxycarbonylmethyl)imidazolium bromide series, greatest was observed when = butyl, pentyl, hexyl octyl. corresponding analogs proved poorly biodegradable.

Язык: Английский

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Designing Small Molecules for Biodegradability

Chemical Reviews, Год журнала: 2007, Номер 107(6), С. 2207 - 2227

Опубликована: Май 27, 2007

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesigning Small Molecules for BiodegradabilityR. S. Boethling, Elizabeth Sommer, and David DiFioreView Author Information U.S. Environmental Protection Agency, Office of Pollution Prevention Toxics 7406M, 1200 Pennsylvania Avenue, NW, Washington, DC 20460 Cite this: Chem. Rev. 2007, 107, 6, 2207–2227Publication Date (Web):May 27, 2007Publication History Received14 September 2006Published online27 May 2007Published inissue 1 June 2007https://doi.org/10.1021/cr050952tCopyright © 2007 American Chemical SocietyRIGHTS & PERMISSIONSACS AuthorChoiceArticle Views11063Altmetric-Citations230LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text article downloads since November 2008 (both PDF HTML) across all institutions individuals. These metrics regularly updated to reflect usage leading up last few days.Citations number other articles citing this article, calculated by Crossref daily. Find more information about citation counts.The Altmetric Attention Score is a quantitative measure attention that research has received online. Clicking on donut icon will load page at altmetric.com with additional details score social media presence given article. how calculated. Share Add toView InAdd Full Text ReferenceAdd Description ExportRISCitationCitation abstractCitation referencesMore Options onFacebookTwitterWechatLinked InReddit (511 KB) Get e-AlertscloseSUBJECTS:Alkyls,Biodegradation,Chemical structure,Lipids,Organic compounds e-Alerts

Язык: Английский

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Ecological Risk Assessment for Aquatic Organisms from Over-Water Uses of Glyphosate

Journal of Toxicology and Environmental Health Part B, Год журнала: 2003, Номер 6(3), С. 289 - 324

Опубликована: Янв. 1, 2003

Although the herbicide glyphosate is most widely used in agriculture, some for control of emergent aquatic weeds ditches, wetlands, and margins water bodies, largely as formulation Rodeo. This article presents an ecological risk assessment (ERA) recommended surfactants or near systems. Glyphosate does not bioaccumulate, biomagnify, persist a biologically available form environment. Its mechanism action specific to plants it relatively nontoxic animals. As commercial product, may be formulated with that increased efficacy but, cases, are more toxic organisms than parent material. For this assessment, three model exposure scenarios--static low-flow systems such ponds, flowing waters streams, subjected tidal flows estuaries--were chosen application rates from 1 8 kg glyphosate/ha were modeled. Additional measured data several field studies also used. acute exposures likely occur, toxicity effect measures purposes assessment. Toxicity obtained literature characterized using probabilistic techniques. Risk assessments based on estimated concentrations would result its use undesirable wetlands over-water situations showed negligible small at less 4 kg/ha only slightly greater kg/ha. Less known about environmental fate toxicology commonly combination Rodeo glyphosate. The purpose judged persistent nor bioaccumulative Distributional analysis deposition LI 700, suggest surfactant insignificant organisms. Assuming similar applications rates, significant effects expected other Induce X-77. Risks +MON 0818 (Roundup) those 700; however, uses, risks still considered small. Similar observed surface resulting aerial Vision (a equivalent Roundup) forestry areas Canada. Concentrations after ground presented risk, but sparse uncertain.

Язык: Английский

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Ozonation and Advanced Oxidation Treatment of Emerging Organic Pollutants in Water and Wastewater

Ozone Science and Engineering, Год журнала: 2008, Номер 30(1), С. 21 - 26

Опубликована: Фев. 14, 2008

A vast number of persistent organic pollutants have been found in wastewater effluent, surface water, and drinking water around the world. This indicates their ineffective removal from using conventional treatment technologies. In addition to classical organics such as organochlorine insecticides, solvents, polychlorinated biphenyls, a growing emerging both synthetic natural origins identified major environmental recent years. variety advanced options suggested for and/or destruction these wastewater, chemical oxidation, activated carbon adsorption, membrane filtration. Of options, oxidation ozone, alone or combination with additional physical/chemical agents (i.e., oxidation), has proved highly effective process wide spectrum aqueous pollutants, including pesticides, pharmaceuticals, personal care products, surfactants, microbial toxins, fatty acids. this paper, we discuss concern aquatic environment focus on issues associated ozonation processes.

Язык: Английский

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Effects of nonionic surfactants on the solubilization and mineralization of phenanthrene in soil–water systems

Biotechnology and Bioengineering, Год журнала: 1992, Номер 40(11), С. 1367 - 1380

Опубликована: Дек. 20, 1992

The solubilization and mineralization of (14)C-phenanthrene in soil-water systems was examined with several commercially available surface-active agents, viz., an alkyl ethoxylate C(12)E(4); two alkylphenol surfactants: C(8)PE(9.5) C(9)PE(10.5); sorbitan the monolaurate (Tween 20) monooleate 80); pairs nonionic surfactant mixtures: C(12)E(4)/C(12)E(23) at a 1:1 ratio, C(12-15)E(3)/C(12-15)E(9) 1:3 ratio; surfactants possessing relatively high critical micelle concentration (CMC) values low aggregation numbers: CHAPS octyglucoside. Surface tension experiments were performed to evaluate sorption onto soil doses required attain CMC systems. Surfactant commenced onset micellization. addition agents observed not be beneficial microbial phenanthrene and, for supra-CMC doses, completely inhibited all tested. A comparison solubilization, surface tension, data confirms that inhibitory effect on degradation is related presence soil. Additional tests demonstrated recovery upon dilution sub-CMC levels, exit rate from micelles. These suggest probably reversible physiological micelle-bacteria interaction, possibly through partial complexing or release membrane material disrupting lamellar structure. This study indicates sorbed hydrophobic organic compounds may concomitant enhancement bioremediation. work needed address physicochemical processes bioavailability enhancement, effects solubilizing microorganisms remediation treatment nonaqueous phase liquids.

Язык: Английский

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Degradation of Recalcitrant Surfactants in Wastewater by Ozonation and Advanced Oxidation Processes: A Review

Ozone Science and Engineering, Год журнала: 2004, Номер 26(4), С. 327 - 343

Опубликована: Авг. 1, 2004

ABSTRACT Surfactants are used in varieties of industrial cleansing processes as well consumer products. Spent surfactants normally enter domestic or wastewater and treated biologically. However, some them resistant to biodegradation released into the environment. Thus, toxicity environmental persistence these emerging concerns. Based on extensive review literature, ozonation advanced oxidation using various combinations ozone, hydrogen peroxide, ultraviolet light irradiation, iron salts were found effective degrading recalcitrant surfactants, including linear alkylbenzene sulfonates, alkylphenol ethoxylates, quaternary ammonium surfactants. Biodegradability was improved after treatment extent aqueous solution real wastewaters. Keywords: OzoneAdvanced Oxidation ProcessesAlkylphenol EthoxylatesFenton ProcessHydrogen PeroxideLinear Alkylbenzene SulfonatesOzonationQuaternary AmmoniumSurfactantWastewater Treatment ACKNOWLEDGMENT This work funded by Natural Sciences Engineering Research Council Canada Alberta Ingenuity Fund.

Язык: Английский

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Surfactant-Enhanced Mobilization and Biodegradation of Polycyclic Aromatic Hydrocarbons in Manufactured Gas Plant Soil

Environmental Science & Technology, Год журнала: 1997, Номер 31(9), С. 2570 - 2576

Опубликована: Авг. 28, 1997

The bioremediation of soil contaminated with polycyclic aromatic hydrocarbons (PAH) often is limited by a low bioavailability the contaminants. effect two nonionic surfactants alkylphenolethoxylate type, Arkopal N-300 and Sapogenat T-300, on PAH in manufactured gas plant was evaluated columns percolated recirculating flushing water. Both enhanced mass transfer rate sorbed into aqueous phase due to solubilization. Solubilized were available for biodegradation. Degradation themselves monitored counting cell numbers surfactant degraders. It could be demonstrated that rapid degradation resulted lack oxygen an inhibition degradation. T-300 degraded more slowly, but depletion occurred after 54 d incubation. Until then surfactant-enhanced mobilization increased as compared treatment without surfactant. Therefore, biodegradability shown one key functions use practice. Reduction content toxicity obtained all cases. Decrease indicated bioluminescence test most pronounced case T-300-amended treatment. concluded can useful tool stimulating biodegradation soil.

Язык: Английский

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