Arsenic attenuation in geothermal streamwater coupled with biogenic arsenic(III) oxidation

Mitsunobu, Satoshi; Hamanura, Natsuko; Kataoka, Takafumi; Shiraishi, Fumito

doi:10.1016/j.apgeochem.2013.04.005

Cited by 21 publications

(11 citation statements)

References 36 publications

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“…S5), which is consistent with the results of previous reports (Xiu et al, 2015;Huhmann et al, 2017). In the As(V) treatments, the proportion of precipitated arsenic was larger than that in the As(III) treatments, indicating that As(V) was preferentially partitioned into the solid phase (Mitsunobu et al, 2013). This may be due to the maximization of the number of coordination sites, such as occurs in neutralization of acidic As(V)-Fe(III) solutions, which provides more surface sites for reaction between As(V) and Fe(III) (Jia and Demopoulos, 2005).…”

Section: Arsenic Immobilization During Microaerophilic Microbial Fe(isupporting

confidence: 92%

“…Total As was quantified on an inductively coupled plasma mass spectrometry (ICP-MS, NexION 300X, Perkin-Elmer) (Sun et al, 2009). The As(III) and As(V) concentrations were determined on an ICP-MS equipped with a high performance liquid chromatography column (HPLC) to separate the As(III) and As(V) (Mitsunobu et al, 2013). To differentiate between arsenic adsorption to surfaces and co-precipitation into Fe(III) oxyhydroxides, an extraction protocol involving NaOH was used to desorb the arsenic from the Fe(III) oxyhydroxides (Huhmann et al, 2017).…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the oxidation of As(III) to As(V) decreases the mobility of arsenic. Chemical and microbial oxidation of As(III) to As(V) could increase the immobilization efficiency for arsenic (Mitsunobu et al, 2013). Under micro-oxic conditions at circumneutral pH, the abiotic oxidation of As(III) by oxygen is slow and the oxidation of As(III) is mainly driven by microorganisms (Bissen et al, 2003;Meharg and Zhao, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Biological Fe(II) and As(III) oxidation immobilizes arsenic in micro-oxic environments

Tong

Liu

Hao

et al. 2019

Geochimica et Cosmochimica Acta

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Fe(III) oxyhydroxides play critical roles in arsenic immobilization due to their strong surface affinity for arsenic. However, the role of bacteria in Fe(II) oxidation and the subsequent immobilization of arsenic has not been thoroughly investigated to date, especially under the micro-oxic conditions present in soils and sediments where these microorganisms thrive. In the present study, we used gel-stabilized gradient systems to investigate arsenic immobilization during microaerophilic microbial Fe(II) oxidation and Fe(III) oxyhydroxide formation. The removal and immobilization of dissolved As(III) and As(V) proceeded via the formation of biogenic Fe(III) oxyhydroxides through microbial Fe(II) oxidation. After 30 days of incubation, the concentration of dissolved arsenic decreased from 600 to 4.8 μg L-1. When an Fe(III) oxyhydroxide formed in the presence of As(III), most of the arsenic ultimately was found as As(V), indicating that As(III) oxidation accompanied arsenic immobilization. The structure of the microbial community in As(III) incubations was highly differentiated with respect to the As(V)-bearing ending incubations. The As(III)containing incubations contained the arsenite oxidase gene, suggesting the potential for microbially mediated As(III) oxidation. The findings of the present study suggest that As(III) immobilization can occur in microoxic environments after microbial Fe(II) oxidation and biogenic Fe(III) oxyhydroxide formation via the direct microbial oxidation of As(III) to As(V). This study demonstrates that microbial Fe(II) and As(III) oxidation are important geochemical processes for arsenic immobilization in micro-oxic soils and sediments.

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Section: Arsenic Immobilization During Microaerophilic Microbial Fe(isupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biological Fe(II) and As(III) oxidation immobilizes arsenic in micro-oxic environments

Tong

Liu

Hao

et al. 2019

Geochimica et Cosmochimica Acta

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“…Recent molecular studies have revealed the distribution of the diverse arsenite oxidase gene such as aroA/asoA/ aoxB in various As-contaminated environments (Inskeep et al 2007;Quéméneur et al 2008;Hamamura et al 2013,). Contribution of rapid biotic As(III) oxidation was found in spring outflow channel waters, and bacterial arsenite oxidase gene was detected in channel soil samples (Mitsunobu et al 2013). However, little or no information is available on the role of microbial As(III) oxidation in the sand filtration units of AIRPs.…”

Section: Introductionmentioning

confidence: 99%

Potential of biological arsenite oxidation in sand filtration units at arsenic–iron removal plants (AIRPs) in Bangladesh

et al. 2019

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This study is aimed to investigate biological oxidation of arsenic [As(III)] in sand component of arsenic-iron removal plant (AIRP). Water and sand samples were collected from the municipal and household AIRP units (MAIRP and HAIRPs) at Manikganj district, Bangladesh. These samples were analyzed using arsenic speciation cartridge with inductively coupled plasma-mass spectrometry for arsenic and iron detection and phylogenetic analysis based on aoxB gene sequencing. It was observed that arsenic concentration in the raw water, before and after sand filtration, ranged from 13.0-81.0 to 4.0-21.0 μg/L, respectively, which majorly contained reduced arsenic [As(III)] in the inlet and oxidized arsenic [As(V)] in the outlet. The results of our batch experiments showed that indeed sand unit of MAIRP oxidized As(III) with 36 g/h estimated biological oxidation potential which was considered enough to oxidize all the As(III) loading (6.3 g/h) in the influent. Additionally, bacterial arsenite oxidase gene (aoxB) was detected in the sand sample and has 80% sequence similarity with Polymorphum gilvum, an alphaproteobacteria on the phylogenetic tree. This study, therefore, revealed that AIRP sand units have enough potential of biological activity to ensure overall arsenic removal through As(III) oxidation. However, future research is necessary to unfold the basic mechanistic approach explored in this plant for further modification if need arises.

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“…Total RNA was extracted using the RNeasy mini kit (Qiagen, Chatsworth, CA) followed by a DNase treatment as described previously ( 9 ). In qRT-PCR, 25 ng of total RNA was reverse-transcribed, then qPCR was performed in triplicate for each RNA sample using the CFX96 real-time PCR detection system (Bio-Rad) as described previously ( 19 ). The bacterial and prokaryote universal primers Bact1369-F and Prok1492-R ( 26 ) were used to detect the 16S rRNA gene, while aoxB 1-2F and aoxB M2-1R primers were used for the aioA gene ( 21 ).…”

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confidence: 99%

Cellular Response of <i>Sinorhizobium</i> sp. Strain A2 during Arsenite Oxidation

2015

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Arsenic (As) is a widely distributed toxic element in the environment and microorganisms have developed resistance mechanisms in order to tolerate it. The cellular response of the chemoorganotrophic arsenite (As[III])-oxidizing α-Proteobacteria, Sinorhizobium sp. strain A2, to arsenic was examined in the present study. Several proteins associated with arsenite oxidase and As resistance were shown to be accumulated in the presence of As(III). A shift in central carbon metabolism from the tricarboxylic acid pathway to glyoxylate pathway was also observed in response to oxidative stress. Our results revealed the strategy of the As(III)-oxidizing Sinorhizobium strain to mitigate arsenic toxicity and oxidative damage by multiple metabolic adaptations.

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Arsenic attenuation in geothermal streamwater coupled with biogenic arsenic(III) oxidation

Cited by 21 publications

References 36 publications

Biological Fe(II) and As(III) oxidation immobilizes arsenic in micro-oxic environments

Biological Fe(II) and As(III) oxidation immobilizes arsenic in micro-oxic environments

Potential of biological arsenite oxidation in sand filtration units at arsenic–iron removal plants (AIRPs) in Bangladesh

Cellular Response of <i>Sinorhizobium</i> sp. Strain A2 during Arsenite Oxidation

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