Removal of linear alkylbenzene sulfonates and their degradation intermediates at low temperatures during activated sludge treatment

León, Victor; López, Carmen; Lara-Martín, Pablo A.; Prats, Daniel; Varó, Pedro; González-Mazo, Eduardo

doi:10.1016/j.chemosphere.2005.11.045

Cited by 37 publications

(15 citation statements)

References 22 publications

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“…By contrast, long-chain homologues (C 16 and C 17 SAS) represented the major fraction in samples from the effluent, which may be attributed in part to their lower bioavailability and, hence, slower degradation in the WWTP. The same behavior has been previously observed for LAS homologues in both aerobic and anaerobic degradation assays (León et al, 2006;Lara-Martín et al, 2007). Additionally, long-chain homologues showed a higher tendency to be sorpted onto sludge, where the highest SAS concentrations were measured in this and a previous study by Field et al…”

supporting

confidence: 89%

“…In spite of the efficiency of WWTP removing surfactants from wastewater, significant concentrations of these compounds can be measured in many surface water, sediment and suspended solid samples (Prats et al, 1997;Di Corcia, 1998;Matthijs et al, 1999;Morrall et al, 2006). So far, most of the effort has been put into understanding the distribution and environmental behavior of two surfactants: linear alkylbenzene sulfonates (LAS) and nonylphenol polyethoxylates (NPEO).…”

mentioning

confidence: 99%

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Determination and occurrence of secondary alkane sulfonates (SAS) in aquatic environments

Baena-Nogueras

González-Mazo

Lara-Martín

2013

Environmental Pollution

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a b s t r a c tA new methodology has been developed for the determination of secondary alkane sulfonates (SAS), an anionic surfactant, in environmental matrices. Sediment and sludge samples were extracted using pressurized liquid extraction and sonication, whereas wastewater and surface water samples were processed using solid-phase extraction. Extraction recoveries were acceptable for both aqueous (78e120%) and solid samples (83e100%). Determination of SAS was carried out by high or ultra performance liquid chromatography e mass spectrometry using ion trap and time-of-flight detectors. The methodology was applied to samples from Guadalete River (SW Spain), where SAS concentrations below 1 mg L À1 were measured in surface water, and from 72 to 9737 mg kg À1 in sediments. Differential partitioning was observed for SAS homologues as those having a longer hydrocarbon chain which preferentially sorbed onto particulate matter. A preliminary environmental risk assessment also showed that SAS measured levels were not harmful to the aquatic community in the sampling area.

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supporting

confidence: 89%

mentioning

confidence: 99%

Determination and occurrence of secondary alkane sulfonates (SAS) in aquatic environments

Baena-Nogueras

González-Mazo

Lara-Martín

2013

Environmental Pollution

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“…Sua aplicação é como o princípio ativo da maioria dos detergentes e sabões para lavar roupas. O produto comercial consiste em uma mistura de homólogos e seus isômeros de posição, com cadeias alquílicas lineares variando de 10 a 14 átomos de carbono (homólogos C 10 a C 14 , respectivamente), entretanto, nos produtos atuais de limpeza predomina o LAS com uma mistura dos homólogos C 10 , C 11 , C 12 e C 13 (NAKAE;TSUJI;YAMANAKA, 1981 (BERNA et al, 1989;CLARA et al, 2007;LEÓN et al, 2006;TEMMINK & KLAPWIJK, 2004).…”

Section: Introductionunclassified

Degradação dos homólogos do alquilbenzeno linear sulfonato em lodo anaeróbio disperso

Silva

Silva²,

Oliveira³

et al. 2017

Eng. Sanit. Ambient.

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RESUMO: Avaliou-se a degradação anaeróbia do alquilbenzeno linear sulfonato (LAS) e seus homólogos em experimento em escala de laboratório. Foi usado lodo disperso para minimizar o efeito da adsorção. Em primeiro lugar, determinaram-se a maior concentração de LAS (substrato) e a menor concentração de etanol (cossubstrato) que manteriam os micro-organismos ativos, resultando em 25 e 200 mg.L-1, nessa ordem. Posteriormente, o experimento (90 dias) foi realizado em um reator somente com etanol (controle) e outro (reator teste, triplicata) com ambos os substratos nas concentrações anteriores. Os micro-organismos apresentaram crescimento exponencial em 48 h para os 2 reatores; não ocorreu toxicidade pelo LAS no reator teste durante esse período inicial, quando o etanol foi todo consumido. Após então, houve decréscimo de micro-organismos, indicando possível toxicidade por LAS ou intermediários. Observou-se também a diminuição ou ausência da produção de ácidos graxos voláteis e de metano. Portanto, com lodo disperso, a maior parcela da remoção foi por conta da biodegradação, porém, com formação de intermediários que não o acetato nem o metano, apontando a inibição à acidogênese e à metanogênese. Ao final, a remoção do LAS foi de 35% por biodegradação e apenas 0,35% por adsorção ao lodo. A ordem preferencial de biodegradação para os homólogos foi de C13 para C12, C11 e C10, com percentual de degradação em relação à massa inicial de 49, 31, 24 e 17%, respectivamente. A mesma ordem deu-se para a adsorção, da maior para a menor cadeia alquílica, sendo a remoção por adsorção de 0,85; 0,32; 0,13 e 0,01%, respectivamente.

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“…The extensive use of LAS results in thousands of tons of these contaminants being incorporated into wastewater and, consequently, into the sludge. The fate and effect of LAS in the aquatic environment have been studied extensively by several authors over the last decades [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A new method for the routine analysis of LAS and PAH in sewage sludge by simultaneous sonication-assisted extraction prior to liquid chromatographic determination

Santos

Aparicio

Alonso

2007

Analytica Chimica Acta

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Removal of linear alkylbenzene sulfonates and their degradation intermediates at low temperatures during activated sludge treatment

Cited by 37 publications

References 22 publications

Determination and occurrence of secondary alkane sulfonates (SAS) in aquatic environments

Determination and occurrence of secondary alkane sulfonates (SAS) in aquatic environments

Degradação dos homólogos do alquilbenzeno linear sulfonato em lodo anaeróbio disperso

A new method for the routine analysis of LAS and PAH in sewage sludge by simultaneous sonication-assisted extraction prior to liquid chromatographic determination

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