Combined toxicity of pesticide mixtures on green algae and photobacteria

Liu, Shu-Shen; Wang, Chenglin; Zhang, Jin; Zhu, Xiangwei; Li, Weiying

doi:10.1016/j.ecoenv.2013.05.018

Cited by 52 publications

(20 citation statements)

References 36 publications

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“…This temporal and spatial variability was consistent with other studies conducted for different water systems, which have reported high temporal and spatial variability of THMs and HAAs in the summer and spring months [14,48]. High natural organic matter, water temperature [49], pH, and chloramine dose [50] may explain the high temporal and spatial variability in the surface water systems.…”

Section: Discussionsupporting

confidence: 90%

Evaluation of Drinking Water Disinfectant Byproducts Compliance Data as an Indirect Measure for Short-Term Exposure in Humans

Parvez

Frost

Sundararajan

2017

IJERPH

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In the absence of shorter term disinfectant byproducts (DBPs) data on regulated Trihalomethanes (THMs) and Haloacetic acids (HAAs), epidemiologists and risk assessors have used long-term annual compliance (LRAA) or quarterly (QA) data to evaluate the association between DBP exposure and adverse birth outcomes, which resulted in inconclusive findings. Therefore, we evaluated the reliability of using long-term LRAA and QA data as an indirect measure for short-term exposure. Short-term residential tap water samples were collected in peak DBP months (May–August) in a community water system with five separate treatment stations and were sourced from surface or groundwater. Samples were analyzed for THMs and HAAs per the EPA (U.S. Environmental Protection Agency) standard methods (524.2 and 552.2). The measured levels of total THMs and HAAs were compared temporally and spatially with LRAA and QA data, which showed significant differences (p < 0.05). Most samples from surface water stations showed higher levels than LRAA or QA. Significant numbers of samples in surface water stations exceeded regulatory permissible limits: 27% had excessive THMs and 35% had excessive HAAs. Trichloromethane, trichloroacetic acid, and dichloroacetic acid were the major drivers of variability. This study suggests that LRAA and QA data are not good proxies of short-term exposure. Further investigation is needed to determine if other drinking water systems show consistent findings for improved regulation.

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Section: Discussionsupporting

confidence: 90%

Evaluation of Drinking Water Disinfectant Byproducts Compliance Data as an Indirect Measure for Short-Term Exposure in Humans

Parvez

Frost

Sundararajan

2017

IJERPH

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“…Single species of algae have been used to determine the eco‐toxic effects of wastewaters from municipalities, textile, paper mill, mining, oil refinery and herbicide manufacturing plants . In this present work, the eco‐toxicity of degraded drug solutions was evaluated by green algae Chlorella pyrenoidos , which is found to be very sensitive to sulfamethoxazole and its degraded products.…”

Section: Introductionmentioning

confidence: 99%

Combination of enzymatic degradation by chloroperoxidase with activated sludge treatment to remove sulfamethoxazole: performance, and eco-toxicity assessment

Xiao

Jiang

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND Sulfamethoxazole is found in surface and ground waters because it is usually not metabolized and simply passes through the human body after ingestion. This drug is difficult to degrade by conventional treatments and may cause environmental concerns. RESULTS A rapid and efficient enzymatic degradation of sulfamethoxazole by a heme peroxidase, chloroperoxidase (CPO), was investigated in this work. The degradation efficiency of sulfamethoxazole reached 98.64% within 20 min at room temperature, atmospheric pressure and environment‐friendly reaction conditions with an enzyme concentration of approximately 10−9 mol L−1. High performance liquid chromatography–mass spectrometry analysis was employed to identify the intermediates and final products. Moreover, chemical oxygen demand (COD) measurements showed that pre‐treatment by CPO‐H2O2 oxidative degradation followed by existing bioremediation technologies can effectively improve the efficiency and thoroughness of decontaminating this drug from wastewater. The degradation efficiency was enhanced from 76.5% to 84.47%, and the COD removal increased from 29.72% to 51.32%. The eco‐toxicity test using a green algae, Chlorella pyrenoidos, showed that the degraded products had lower toxicity than the parent drug. CONCLUSION CPO catalyzed oxidative degradation is a promising alternative for treatment of wastewater containing sulfonamide drugs. This enzymatic method is also suitable for treatment of other sulfonamide antibiotics. © 2016 Society of Chemical Industry

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“…The presence of agrochemicals in aquatic ecosystems is an evident concern given the risk they pose to non-target aquatic species (Liu et al, 2013). Environmental disturbance caused by agrochemicals can potentially impact the microalgae community and as a consequence the system's primary productivity (Gómez de Barreda Ferraz et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Many microalgae species have been used as test organisms in different studies focused on effects of contaminants in aquatic ecosystems (Lewis, 1995;Ma, 2002;Ma et al, 2003;Gómez de Barreda Ferraz et al, 2004;Dewez et al, 2005;Liu et al, 2013). The freshwater green microalgae Selenastrum capricornutum (=Pseudokirchneriella subcapitata) is an organism widely used in eco-toxicity assays to monitor disrupted ecosystems as well as to predict toxicity of different compounds (Oliveira-Filho et al, 2004;Chung et al, 2007;Rodgher et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Immediate and mid-term effects of pyrimethanil toxicity on microalgae by simulating an episodic contamination

et al. 2015

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Combined toxicity of pesticide mixtures on green algae and photobacteria

Cited by 52 publications

References 36 publications

Evaluation of Drinking Water Disinfectant Byproducts Compliance Data as an Indirect Measure for Short-Term Exposure in Humans

Evaluation of Drinking Water Disinfectant Byproducts Compliance Data as an Indirect Measure for Short-Term Exposure in Humans

Combination of enzymatic degradation by chloroperoxidase with activated sludge treatment to remove sulfamethoxazole: performance, and eco-toxicity assessment

Immediate and mid-term effects of pyrimethanil toxicity on microalgae by simulating an episodic contamination

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