Iso‐Branching of linear alkylbenzene sulphonate (LAS). Biodegradation study of two model compounds

Cavalli, L.; Cassani, G.; Lazzarin, M.; Maraschin, Christelle; Nucci, G.; Berná, José; Bravo, José Elías Becerril; Ferrer, J.; Moreno, A.

doi:10.1080/02772249609358310

Cited by 10 publications

(14 citation statements)

References 8 publications

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“…Radiochemical recoveries of 14 C in solids, liquids, and CO2 (including 14 CO3 2and H 14 CO3 -) were done at the end of each test and ranged from 65 to 107%; most were >90%. Radiochemical recoveries of 14 C in solids, liquids, and CO2 (including 14 CO3 2and H 14 CO3 -) were done at the end of each test and ranged from 65 to 107%; most were >90%.…”

Section: Figure 1 Chemical Structures Of [ 14 C]benzene Uniformly Rmentioning

confidence: 99%

“…Consequently, several workers developed appropriate analytical methods and monitored DATS and DATS biodegradation intermediates (DATSI). In order to better understand the fate of commercial LAS coproducts in the environment, 14 C-ringlabeled DATS and iso-LAS model compounds were synthesized and exposed to simulated activated sludge, soil, and receiving water environments. Field and co-workers (11,12) conducted monitoring of these compounds in a sewage contaminated groundwater, and Tabor and Barber (13) found DATS in some bottom sediments of the Mississippi River.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of Coproducts of Commercial Linear Alkylbenzene Sulfonate

Nielsen¹,

Britton²,

Beall³

et al. 1997

Environ. Sci. Technol.

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Dialkyltetralin sulfonate (DATS) and single methyl-branched isomers of linear alkylbenzene sulfonate (iso-LAS) are coproducts that together can range from 1 to 10% of commercial LAS depending on the manufacturing process. Biodegradation studies using radiolabeled DATS and iso-LAS showed mineralization by indigenous microbial populations in laboratory simulations of aquatic and soil environments. Half-lives ranged from 2 to 20 days, which is rapid enough to suggest that accumulation would not occur in these environments. Upon exposure to laboratory activated sludge treatment, most model iso-LAS compounds showed greater than 98% parent compound removal, extensive mineralization (>50%), and 79-90% ultimate biodegradation (mineralization plus conversion to biomass). Activated sludge treatment of DATS and one of the iso-LAS isomers (methyl group attached to the benzylic carbon of the alkyl chain) resulted in >98% removal, 3-12% ultimate biodegradation and apparent formation of carboxylated biodegradation intermediates that accounted for 88-97% of the original material. These DATS and iso-LAS biodegradation intermediates continued to mineralize in simulated receiving water and soil environments at rates similar to that of sulfophenyl carboxylate (SPC) intermediates of a standard LAS.

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Section: Figure 1 Chemical Structures Of [ 14 C]benzene Uniformly Rmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biodegradation of Coproducts of Commercial Linear Alkylbenzene Sulfonate

Nielsen¹,

Britton²,

Beall³

et al. 1997

Environ. Sci. Technol.

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“…The argument now centers on the biodegradability of the two major groups of the compounds identified in ROC, mSPC, and DATS‐C (1). Kölbener et al [10] find them to be refractory in a trickling filter, while others [11–13] report extensive biodegradability in different test systems. There need be no real contradiction among these data sets, apart from the different methods, and it would seem sensible to resolve the question by checking the behavior of ROC in the systems of Cavalli et al [12], and, correspondingly, the behavior of their compounds in a trickling filter.…”

Section: Discussionmentioning

confidence: 99%

“…ROC turns out to be mainly carboxylated dialkyltetralinesulfonates (DATS‐C) and sulfophenylcarboxylates with branched chains (mSPC; 1) [10]. A discussion now revolves about the biodegradability of these compounds [11–13].…”

Section: Introductionmentioning

confidence: 99%

Desulfonation of biotransformation products from commercial linear alkylbenzenesulfonates

Mämpel

Hitzler

Ritter

et al. 1998

Enviro Toxic and Chemistry

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Earlier work shows that the biodegradation and biotransformation of commercial linear alkylbenzenesulfonate (LAS) as a carbon source for growth leads to a residue of sulfonated aromatic compounds, termed refractory organic carbon, from the synthetic by‐products. We now show that this refractory organic carbon, after separation from sulfate ion, is utilized extensively as a sulfur source for bacterial growth. The products of desulfonation are expected to be biodegradable, so we question the value of adjectives like refractory.

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“…The MLAS also has a favorable biodegradability and toxicity profile compared with that of low-dialkyltetralin sulfonate LAS (37,38). At least a few new technologies have been developed (i) to meet today's changing environmental requirements, (ii) to take advantage of advances in process technology, and (iii) to address changes in consumer habits.…”

Section: New Milestones In Surfactant Technologymentioning

confidence: 98%

The evolution of anionic surfactant technology to meet the requirements of the laundry detergent industry

Scheibel¹

2004

J Surfact & Detergents

147

107

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Surfactants are the single most important ingredients in laundry and household cleaning products, comprising from 15 to 40% of the total detergent formulation. They play a key role in the $60 billion detergent market, which is the focus of this review. The past, present, and future trends of mainframe anionic surfactants and the key technological developments for these surfactants are discussed. The focus of this review is on how surfactants are changed (i) to meet changing environmental requirements, (ii) to take advantage of advances in process technology, and (iii) to address changes in consumer habits.

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Iso‐Branching of linear alkylbenzene sulphonate (LAS). Biodegradation study of two model compounds

Cited by 10 publications

References 8 publications

Biodegradation of Coproducts of Commercial Linear Alkylbenzene Sulfonate

Biodegradation of Coproducts of Commercial Linear Alkylbenzene Sulfonate

Desulfonation of biotransformation products from commercial linear alkylbenzenesulfonates

The evolution of anionic surfactant technology to meet the requirements of the laundry detergent industry

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