Evaluation of Linear Alkylbenzene Sulfonate (LAS) behaviour in agricultural soil through laboratory continuous studies

Oliver-Rodríguez, B.; Zafra-Gómez, A.; Reis, Marco S.; Duarte, Belmiro P.M.; Verge, C.; Ferrer, J.; Pérez-Pascual, M.; Vı́lchez, J.L.

doi:10.1016/j.chemosphere.2015.02.037

Cited by 15 publications

(7 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They are widely used in soap, toothpaste, cleaning detergents, and shampoo [2,3]. They also have numerous industrial applications in cosmetic and medicinal products, textiles, foodstuffs, paper, oil recovery, paints, polymers, pesticides, and mining [2,4].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Fenton and Photo-Fenton Processes for Removal of Linear Alkyle Benzene Sulfonate (Las) from Aqueous Solutions

Miranzadeh¹,

Zarjam²,

Dehghani³

et al. 2016

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

The aim of our study was to investigate the effectiveness of Fenton and photo-Fenton processes for removing anionic surfactants from aqueous solutions. The study was conducted using 200 mgL and 120 mgL -1 ferrous ion) were 69.38 and 86.66%, respectively, which is consistent with the significant increase in the rate of LAS removal efficiency with reaction time (P<0.05). In conclusion, anionic surfactants removal was significantly correlated with reaction time by both methods, but showed less dependence on H 2 O 2 and Fe 2+ concentrations.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of Fenton and Photo-Fenton Processes for Removal of Linear Alkyle Benzene Sulfonate (Las) from Aqueous Solutions

Miranzadeh¹,

Zarjam²,

Dehghani³

et al. 2016

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

show abstract

“…O efeito matriz foi pouco pronunciado, com valores na faixa que corresponde à baixa interferência da matriz no sinal do detector (-20% < efeito matriz < 20%) (Tabela 1); portanto, não influenciando nos limites de detecção e quantificação do método, calculados a partir dos parâmetros das equações de regressão. 25 Os resultados apresentados na Tabela 1 referem-se ao método com a coluna analítica C 18 , mas os do método com a C 8 foram muito semelhantes.…”

Section: Condições Cromatográficasunclassified

“…Ou ainda, pela extração em fase sólida (SPE -solid phase extraction), que também atua na remoção de interferentes que coeluem com os homólogos do LAS, utilizando as colunas de troca aniônica muito forte (SAX -strong anionic exchange) e fase reversa octadecilsilano (C 18 ), já que o LAS possui na sua estrutura uma porção não polar, a cadeia alquílica, e outra polar, o grupo fenilsulfonato, fazendo com que ele seja retido nas duas colunas. 4,5,9,20,[23][24][25] Dada a crescente preocupação sobre a presença de LAS em amostras ambientais, líquidas e sólidas, e levando-se em conta o maior uso de tratamento anaeróbio para esgotos sanitários, bem como os avanços nos estudos sobre a sua biodegradabilidade, é importante que a sua concentração seja quantificada por método analítico adequado. O objetivo do trabalho foi implantar uma metodologia empregando CLAE e SPE para a quantificação de LAS em afluente, efluente e lodo de ETE e em água e sedimento de rio.…”

Section: Introductionunclassified

Quantificação de alquilbenzeno linear sulfonato em estação de tratamento de efluentes e rios por cromatografia líquida de alta eficiência e extração em fase sólida

Silva¹,

Gavazza²,

Florêncio³

et al. 2017

Quim. Nova

View full text Add to dashboard Cite

Recebido em 28/06/2016; aceito em 21/12/2016; publicado na web em 05/02/2017 QUANTIFICATION OF LINEAR ALKYLBENZENE SULFONATE IN SEWAGE TREATMENT PLANTS AND RIVERS BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY AND SOLID PHASE EXTRACTION. The procedures to implement a chromatographic method for the quantification of linear alkyl benzene sulfonate (LAS) in the influent, effluent and sludge of a wastewater treatment plant (WWTP), and in river water and sediment, are described and evaluated. The columns octylsilane (C 8 ) and octadecylsilane (C 18 ) for high performance liquid chromatography were evaluated for separation of LAS homologues. The results showed that both columns separated the four homologues, but C 18 was better for separation of the isomers of each homologue. This enabled to qualitatively evaluate the degradation of homologues in the WWTP, according to their respective isomers. Samples pretreatment by solid phase extraction (SPE) columns, strong anionic exchange (SAX) and C 18 , was also evaluated. SPE was necessary for water river samples, either to concentrate LAS or to remove interference in the matrix; however, for WWTP samples, SPE showed unnecessary. The recovery of LAS homologues, after the procedures for sample preparation, was 90 to 110% with an accuracy of 1 to 5%. The WWTP was efficient in LAS removal from domestic sewage; however, the concentrations in water and sediments of the receiving body were higher than the limits established by legislation due to illegal discharges of untreated sewage.Keywords: LAS homologues and isomers; anaerobic treatment; validation of chromatographic method; SPE pre-treatment. INTRODUÇÃOAlquilbenzeno linear sulfonato (LAS -linear alkylbenzene sulfonate) é o tensoativo aniônico mais utilizado como princípio ativo dos detergentes e sabões em pó, e por isso, o de maior produção (3 milhões de toneladas em 2000) e consumo mundial (18,2 milhões de toneladas em 2003). O produto comercial é uma mistura de homólogos e isômeros de posição com cadeias lineares contendo de 10 a 14 átomos de carbono e foi introduzido no mercado como substituto biodegradável do alquilbenzeno sulfonato (ABS -alkylbenzene sulfonate). 1,2 O LAS é produzido pela sulfonação do alquilbenzeno linear (LAB -linear alkylbenzene), obtido pela alquilação de Friedel Crafts. Neste processo são usados diferentes catalisadores, alterando o percentual dos isômeros e, consequentemente, a viscosidade, a solubilidade e a aplicação do produto final. Quando o ácido fluorídrico é utilizado como catalisador, o percentual dos isômeros em cada homólogo é quase equivalente (17 a 20%); e quando o cloreto de alumínio é utilizado, são produzidos, majoritariamente, os isômeros 2-fenil (2Ø) (30%), seguido do 3Ø (20%) e decrescendo gradualmente para os isômeros 4Ø a 6Ø (15 a 16%). 1,3 O maior consumo doméstico de LAS tem provocado o aumento das suas concentrações em esgotos sanitários (1 a 15 mg L -1 ) que chegam nas estações de tratamento (ETE) ou nas águas de rio, bem como nos lodos de ETE (<1 a 10 g kg -1 de matéria seca) ...

show abstract

“…De-ionized (DI) water was used in all experiments. Commercial HLAS consists of 20 or more isomers and homologues, with a sulfonated benzene ring at the para-position attached to a linear alkyl chain (10-13 carbon atoms) [2,12]. For the positional isomers, the benzene ring is substituted on any carbon except the end of the alkyl chain.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…Surfactants are widely used in many fields including cosmetics, coatings and especially in the detergent industry [1][2][3]. Anionic surfactants, such as linear sodium alkylbenzenesulfonate (NaLAS), alkylether sulfate (AES) and alkyl sulfate (AS) are popular due to their attractive economics to meet consumer requirements for lower-cost and higher-performance products [4,5].…”

Section: Introductionmentioning

confidence: 99%

Insights into the Dissolution Kinetics of NaLAS Tablets

Pan

Shen²,

Guan³

et al. 2017

J Surfact & Detergents

View full text Add to dashboard Cite

In this work, the dissolution behaviors of a series of sodium alkylbenzenesulfonates (NaLAS) tablets with different moisture contents and neutralization degrees were investigated in aqueous solution. The ANOVA‐based, model‐independent and model‐dependent methods were employed to perform comparison analyses on dissolution profiles. The measurements of powder X‐ray diffraction patterns and mechanical properties elucidate distinct differences in each formula. The results show that ANOVA provides a possibility for finding the source of differences among different variables, and the model‐independent methods including the k values and mean dissolution time are easy to interpret and perform comparison analyses. The Hixson–Crowell model gives satisfactory correlation results for the dissolution data and the dissolution kinetics parameters are obtained. The inhibition effects of neutralization degree and moisture content on NaLAS dissolution were examined, which reveals that the increase in lamellar phase proportion leads to the reduction of dissolution rate. The comparison analyses performed in this work form part of a methodology for dissolution profile prediction and comparison.

show abstract

Evaluation of Linear Alkylbenzene Sulfonate (LAS) behaviour in agricultural soil through laboratory continuous studies

Cited by 15 publications

References 21 publications

Comparison of Fenton and Photo-Fenton Processes for Removal of Linear Alkyle Benzene Sulfonate (Las) from Aqueous Solutions

Comparison of Fenton and Photo-Fenton Processes for Removal of Linear Alkyle Benzene Sulfonate (Las) from Aqueous Solutions

Quantificação de alquilbenzeno linear sulfonato em estação de tratamento de efluentes e rios por cromatografia líquida de alta eficiência e extração em fase sólida

Insights into the Dissolution Kinetics of NaLAS Tablets

Contact Info

Product

Resources

About