The degradation of linear alkylbenzene sulfonate (LAS) in the presence of light and natural biofilms: The important role of photosynthesis

Xia, Hua; Li, Ming; Su, Yulong; Dong, Deming; Guo, Zhiyong; Liang, Dapeng

doi:10.1016/j.jhazmat.2012.06.005

Cited by 25 publications

(13 citation statements)

References 38 publications

(79 reference statements)

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“…Hormesis has been observed in all groups of organisms, including bacteria, fungi, higher plants, and animals (Calabrese 2005). Low LAS concentrations improved the growth of M. aeruginosa in the present study possibly because of the following: (1) LAS could be degraded by algae (Hua et al 2012), which could provide carbon resource for their growth; (2) LAS could alter membrane permeability, which may change nutrient uptake from the medium by M. aeruginosa; and (3) low concentrations of LAS could stimulate the photosynthesis of M. aeruginosa (Fig. 4).…”

Section: Discussionmentioning

confidence: 52%

“…1). Considering that the experiments were conducted in a relatively sterile manner, we speculated that LAS concentrations decreased possibly because algae adsorbed/absorbed and degraded these substances (Fernadez et al 1995;Hua et al 2012). Hence, exposure concentrations in the present study corresponded to initial exposure concentrations or nominal exposure concentrations.…”

Section: Discussionmentioning

confidence: 82%

“…This phenomenon indicated that cells were in a lag phase or prolonged the lag phase to cope with the toxicity of high LAS concentrations. Resumption may be explained as follows: first, M. aeruginosa can adsorb, absorb, or degrade the LAS; as M. aeruginosa proliferation, LAS concentration in the medium could be reduced (Fernadez et al 1995;Hua et al 2012); second, the lower LAS concentrations in the late stage of the experiments could stimulate the growth of Fig. 3 Contents of chlorophyll a (a), carotenoid (b), and protein (c) per cell of M. aeruginosa exposed to various concentrations of LAS at 12 days.…”

Section: Discussionmentioning

confidence: 99%

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Effects of linear alkylbenzene sulfonate on the growth and toxin production of Microcystis aeruginosa isolated from Lake Dianchi

Wang

Zhang

Song

et al. 2014

Environ Sci Pollut Res

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The exogenous organic pollutant linear alkylbenzene sulfonate (LAS) pollution and Microcystis bloom are two common phenomena in eutrophic lakes, but the effects of LAS alone on Microcystis remain unclear. In the present study, we investigated the effects of LAS on the growth, photochemical efficiency, and microcystin production of Microcystis aeruginosa in the laboratory. Results showed that low LAS (≤10 mg/L) concentrations improved the growth of M. aeruginosa (12 days of exposure). High LAS (20 mg/L) concentrations inhibited the growth of M. aeruginosa on the first 8 days of exposure; afterward, growth progressed. After 12 days of exposure, the concentrations of chlorophyll a in algal cells were not significantly affected by any of LAS concentrations (0.05 to 20 mg/L) in the present study; by contrast, carotenoid and protein concentrations were significantly inhibited when LAS concentrations reached as high as 20 mg/L. After 6 and 12 days of exposure, low LAS (≤10 mg/ L) concentrations enhanced the maximal photochemical efficiency (Fv/Fm) and the maximal electron transport rate (ETRmax) of M. aeruginosa. Furthermore, LAS increased the microcystin production of M. aeruginosa. Extracellular and intracellular microcystin contents were significantly increased after M. aeruginosa was exposed to high LAS concentrations. Our results indicated that LAS in eutrophic lakes may increase the risk of Microcystis bloom and microcystin production.

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Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

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Effects of linear alkylbenzene sulfonate on the growth and toxin production of Microcystis aeruginosa isolated from Lake Dianchi

Wang

Zhang

Song

et al. 2014

Environ Sci Pollut Res

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“…Sorption of LAS by algal cells was followed by release and degradation by bacteria 21) . Although the contribution of direct photogradation was negligible, some reactive oxidants other than dissolved oxygen produced by photosynthesis might account for LAS degradation 5) . It has also been reported that algae can increase caffeine removal by releasing exudates to stimulate biodegradation processes 22) .…”

Section: Advantage Of Algal-bacterial Culture Over Bacteria-based Culmentioning

confidence: 98%

Nutrient, Linear Alkyl Benzene Sulfonate, and Caffeine Removal from Synthetic Wastewater with an Algal–bacterial Culture and an Activated Sludge Culture in Batch Mode

Katam

聡行²,

Bhattacharyya

et al. 2019

Japanese J. Wat. Treat. Biol.

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An algal-bacterial culture and an activated sludge culture were cultivated for simulating wastewater treatment in an algal pond and an aerated pond, respectively. Linear alkyl benzene sulfonates (LAS) and caffeine were selected as model pollutants. In 7-day batch treatment of synthetic wastewater (dissolved organic carbon (DOC) 106 mg/L, dissolved nitrogen (DN) 57 mg/L, dissolved phosphorous (DP) 6.7 mg/L, LAS 16 mg/L, caffeine 0.03 mg/L), the degradation kinetics for LAS and sulfophenyl carboxylic acids as the intermediates, and caffeine suggested that the bacterial species and population in the activated sludge culture and the algal-bacterial culture were quite different from each other. Finally, the algal-bacterial culture showed balanced removals for the pollutants (DOC 82%, DN 32%, DP 72%, LAS 100%, caffeine 50%). The activated sludge culture showed rapid degradation of LAS and caffeine but it only insufficiently removed nutrients (DOC 73%, DN-20%, DP 23%, LAS 100%, caffeine 63%). These results suggest that the algal pond is a promising technology for simple and low-cost wastewater treatment in warm countries.

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“…There are many studies in the literature about the treatment of surfactants such as adsorption, electrochemical coagulation, electrochemical oxidation, photochemical treatment, sonication, wet air oxidation, photodegradation and ozonation, anaerobic degradation, functionalized multi‐walled carbon nanotubes, photosynthesis, combined electrochemical and photocatalytic process, and Fenton oxidation …”

Section: Introductionmentioning

confidence: 99%

Optimization of Ultrasonication Process for the Degradation of Linear Alkyl Benzene Sulfonic Acid by Response Surface Methodology

Arslan

Topkaya

Veli

et al. 2018

CLEAN Soil Air Water

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The optimization of ultrasonication process applied to linear alkyl benzene sulfonic acid (LABSA) degradation is investigated with response surface methodology in this study. Methylene blue active substance assay is used as a mean to monitor the degradation of LABSA. The effects of independent process variables (initial LABSA concentration, pH, and reaction time) on main material degradation are investigated. Among the independent variables, the greatest effect on LABSA degradation is observed for reaction time. Besides this, the effects of both reaction time and initial LABSA concentration are quite similar. The initial pH value of the solution has a lower effect on degradation performance when compared to other parameters. The predicted maximum detergent degradation was 75% at the optimal conditions of pH 7.8, initial LABSA concentration of 20 mg L−1, and reaction time of 70 min. Specific cost of LABSA degradation by ultrasonic treatment varies from 0.579 to 4.657 Euro g−1 removal LABSA. According to the results of sonication treatment applied to real wastewater, approximately 40% of the LABSA degradation is achieved at three pH values (5.27, 7.50, and 9.59). Because the original pH of the real wastewater is 9.59, it is more feasible to run experiments at this pH value.

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The degradation of linear alkylbenzene sulfonate (LAS) in the presence of light and natural biofilms: The important role of photosynthesis

Cited by 25 publications

References 38 publications

Effects of linear alkylbenzene sulfonate on the growth and toxin production of Microcystis aeruginosa isolated from Lake Dianchi

Effects of linear alkylbenzene sulfonate on the growth and toxin production of Microcystis aeruginosa isolated from Lake Dianchi

Nutrient, Linear Alkyl Benzene Sulfonate, and Caffeine Removal from Synthetic Wastewater with an Algal–bacterial Culture and an Activated Sludge Culture in Batch Mode

Optimization of Ultrasonication Process for the Degradation of Linear Alkyl Benzene Sulfonic Acid by Response Surface Methodology

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