Biotransformation of arsenite and bacterial aox activity in drinking water produced from surface water of floating houses: Arsenic contamination in Cambodia

Chang, Jin-Soo

doi:10.1016/j.envpol.2015.07.027

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…The large increase in bacteria carrying As(III) oxidation genes might be responsible for the lower As availability. This study found that more than 80% of the As(III) oxidation genes were increased by the addition of 100 mg kg –1 CuO NPs, and aoxA , aoxB , aoxC , aoxS , and aoxR genes carried by bacteria could promote the biotransformation of As(III) in the environment . In addition, arsR , arsB , and arsC genes were carried by strain 3AB3 and were found to have oxidation ability and promote the increase in As(V) .…”

Section: Discussionmentioning

confidence: 82%

“…This study found that more than 80% of the As(III) oxidation genes were increased by the addition of 100 mg kg −1 CuO NPs, and aoxA, aoxB, aoxC, aoxS, and aoxR genes carried by bacteria could promote the biotransformation of As(III) in the environment. 90 In addition, arsR, arsB, and arsC genes were carried by strain 3AB3 and were found to have oxidation ability and promote the increase in As(V). 91 Therefore, in this study, low-concentration CuO NP treatment increased the abundance of most arsR and arsC genes and reduced the migration of As to a certain extent.…”

Section: Discussionmentioning

confidence: 99%

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Effects and Mechanisms of Copper Oxide Nanoparticles with Regard to Arsenic Availability in Soil–Rice Systems: Adsorption Behavior and Microbial Response

Jiang

et al. 2022

Environ. Sci. Technol.

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Copper oxide nanoparticles (CuO NPs) are widely used as fungicides in agriculture. Arsenic (As) is a ubiquitous contaminant in paddy soil. The present study was focused on the adsorption behavior of CuO NPs with regard to As as well as the characteristics of the microbial community changes in As-contaminated soil–rice systems in response to CuO NPs. The study found that CuO NPs could be a temporary sink of As in soil; a high dose of CuO NPs promoted the release of As from crystalline iron oxide, which increased the As content in the liquid phase. The study also found that the As bioavailability changed significantly when the dose of CuO NPs was higher than 50 mg kg–1 in the soil–rice system. The addition of 100 mg kg–1 CuO NPs increased the microbial diversity and the abundance of genes involved in As cycling, decreased the abundance of Fe(III)-reducing bacteria and sulfate-reducing genes, and decreased As accumulation in grains. Treatment with 500 mg kg–1 CuO NPs increased the abundance of Fe(III)-reducing bacteria and sulfate-reducing genes, decreased Fe plaques, and increased As accumulation in rice. The adverse effects of CuO NPs on crops and associated risks need to be considered carefully.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Effects and Mechanisms of Copper Oxide Nanoparticles with Regard to Arsenic Availability in Soil–Rice Systems: Adsorption Behavior and Microbial Response

Jiang

et al. 2022

Environ. Sci. Technol.

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“…Since As has been detected to be >100 μg/L in drinking water in some regions, such as China, Argentina, and Chile, , 100 μg/L and 600 μg/L As were chosen in this study. The exposed As was iAs III , which is present in a significant amount under reducing conditions in groundwater. , The As 2 O 3 solution and FeCl 3 powder was purchased from O2si (U.S.) and Adamas reagent (China), respectively. In purchased As 2 O 3 solution, As 2 O 3 was dissolved in 2% nitric acid solution.…”

Section: Methodsmentioning

confidence: 99%

“…The exposed As was iAs III , which is present in a significant amount under reducing conditions in groundwater. 24,25 The As 2 O 3 solution and FeCl 3 powder was purchased from O2si (U.S.) and Adamas reagent (China), respectively. In purchased As 2 O 3 solution, As 2 O 3 was dissolved in 2% nitric acid solution.…”

Section: Shimementioning

confidence: 99%

Arsenic Metabolism and Toxicity Influenced by Ferric Iron in Simulated Gastrointestinal Tract and the Roles of Gut Microbiota

Zhang

et al. 2016

Environ. Sci. Technol.

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Iron (Fe) is a common trace element in drinking water. However, little is known about how environmental concentrations of Fe affect the metabolism and toxicity of arsenic (As) in drinking water. In this study, influence of Fe at drinking water-related concentrations (0.1, 0.3, and 3 mg Fe (total)/L) on As metabolism and toxicity, and the roles of gut microbiota during this process were investigated by using in vitro Simulator of the Human Intestinal Microbial Ecosystem (SHIME). Results showed that Fe had ability to decrease bioaccessible As by coflocculation in small intestine. 0.1 and 0.3 mg/L Fe significantly increased As methylation in simulated transverse and descending colon. Gut microbiota played an important role in alteration of As species, and Fe could affect As metabolism by changing the gut microbiota. Bacteroides, Clostridium, Alistipes, and Bilophila had As resistance and potential ability to methylate As. Cytotoxicity assays of effluents from simulated colons showed that the low levels of Fe decreased As toxicity on human hepatoma cell line HepG2, which might be due to the increase of methylated As. When assessing the health risk of As in drinking water, the residual Fe should be considered.

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Rapid arsenite oxidation by Paenarthrobacter nicotinovorans strain SSBW5: unravelling the role of GlpF, aioAB and aioE genes

Mujawar,

Shamim,

Vaigankar

et al. 2023

Arch Microbiol

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Biotransformation of arsenite and bacterial aox activity in drinking water produced from surface water of floating houses: Arsenic contamination in Cambodia

Cited by 13 publications

References 30 publications

Effects and Mechanisms of Copper Oxide Nanoparticles with Regard to Arsenic Availability in Soil–Rice Systems: Adsorption Behavior and Microbial Response

Effects and Mechanisms of Copper Oxide Nanoparticles with Regard to Arsenic Availability in Soil–Rice Systems: Adsorption Behavior and Microbial Response

Arsenic Metabolism and Toxicity Influenced by Ferric Iron in Simulated Gastrointestinal Tract and the Roles of Gut Microbiota

Rapid arsenite oxidation by Paenarthrobacter nicotinovorans strain SSBW5: unravelling the role of GlpF, aioAB and aioE genes

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