Microbial driven iron reduction affects arsenic transformation and transportation in soil-rice system

Xue, Shengguo; Jiang, Xingxing; Wu, Chuan; Hartley, William; Zhang, Qian; Luo, Xinghua

doi:10.1016/j.envpol.2020.114010

Cited by 50 publications

(14 citation statements)

References 72 publications

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“…The presence of NO 3 − could facilitate Fe(II) oxidation (Zhao et al, 2013), enhancing As immobilization (Figure 6c). Soil is a complex system containing varies of microbes, and the activities of indigenous microorganisms could result in the reductive dissolution of Fe(III) and led to the release of As adsorbed on iron(hydrogen) oxides (Xue et al, 2020). Therefore, the immobilization effect of adding only Fe(II) or NO 3 − was unstable over the long term.…”

Section: Discussionmentioning

confidence: 99%

“…Total Fe and Fe(II) were quantified as previously described in Section 2.3. Arsenic concentrations in solutions were determined with hydride generation atomic fluorescence spectrometry (HG‐AFS, AFS‐8230, Beijing Jitian Instruments Co., China) (Xue et al, 2020). L ‐ascorbic acid (5%, wt/vol) and thiourea solutions (5%, wt/vol) were added as reducing reagents.…”

Section: Methodsmentioning

confidence: 99%

“…The bioavailability and mobilization of As are significantly enhanced in flooded paddy soils (Lee, Huang, Syu, Lin, & Lee, 2014), leading to the feasible uptake of As by rice plants and hence its accumulation in grains (Manikandan et al, 2019; Williams, Raab, Feldmann, & Meharg, 2007). In addition, contaminated rice consumption is deemed to the main As exposure route (Xue et al, 2020), posing a great risk to human health. It's urgent necessary to alleviate As toxicity and reduce As availability in contaminated soils which, specifically, including the transformation of chemical speciation (Cui, Wu, Jiang, Liu, & Xue, 2019; Zhang, Yin, Du, Cai, & Cui, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Biological remediation is widespread appreciated as a low‐cost and environmentally friendly approach in contaminated soils. Recently, biological mediated ferrous iron [Fe(II)] oxidation is shown to be able to trigger the transformation of As speciation (Tong et al, 2019; Xue et al, 2020; Zhang et al, 2020). Fe oxidizing bacteria (FeOB) play a dominant driving role in Fe(II) oxidation under neutral anaerobic environment (Chen et al, 2018; Li et al, 2016), followed by the formation of poorly soluble iron(hydrogen) oxides (Zhao et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Arsenic biomineralization by iron oxidizing strain (Ochrobactrum sp.) isolated from a paddy soil in Hunan, China

et al. 2020

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The biogeochemistry of iron (Fe) could affect arsenic (As) fate and change its availability. Fe(II) oxidation mediated by Fe oxidizing bacteria (FeOB) has the potential for As contamination remediation due to the formation of biogenic minerals. However, microbial Fe(II) oxidation coupled with the immobilization of As and the effect of FeOB on As remediation in soils has not been thoroughly investigated. In this study, a FeOB was isolated from a paddy soil and identified as Ochrobactrum sp. EEELCW01. The kinetics reactions were used to investigate how biological and chemical reactions were involved in the Fe(II)-NO 3 − -FeOB system. Microbial Fe(II) oxidation coupled As mineralization, as well as its application in As contaminated paddy soils was studied. The results suggested that biological pathway contributed to the Fe(II) oxidation and NO 3 − reduction in the whole process, in which the chemical Fe(II) oxidation by biogenic NO 2 − was involved. Meanwhile, Fe(II) facilitated the reduction of NO 2 − while inhibited the reduction of NO 3 −. Adding 2% or more bacteria led to a significant removal effect for aqueous As, resulting in the formation of lepidocrocite and two As-containing minerals (angelellite, loellingite). With the simultaneous application of FeOB and NO 3 − , the available As content in soils decreased by 37.6% and stabilized at 0.80 mg kg −1 finally. In addition, the immobilization showed long-term effect compared to the treatment with Fe(II) or NO 3 − alone.The study proved that the isolated FeOB had a significant ability for As mineralization and immobilization, which provided theoretical and application basis for the remediation of As contaminated soils.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Arsenic biomineralization by iron oxidizing strain (Ochrobactrum sp.) isolated from a paddy soil in Hunan, China

et al. 2020

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“…To date, homologs of genes encoding AioAB have been found in phylogenetically diverse strains including members of α-,β-,γ-Proteobacteria, Actinobacteria, Aquificae, Bacteroidetes, Chlorobi, Chloroflexi, Crenarchaeota, Deinococcus-Thermus, Firmicutes, and Nitrospira (Yamamura and Amachi, 2014). The aioA gene has been successfully used as a molecular marker to capture the diversity and taxonomic information for As(III)-oxidizing microbial communities in environments (Zhang et al, 2017;Xue et al, 2020;Zhai et al, 2020). Primers targeting the aioA genes, such as M1-2F/M3-2R (approximate amplicon size of 1,100 bp) (Quéméneur et al, 2008) and deg1F/deg1R (530 bp) (Inskeep et al, 2007) have been developed.…”

Section: Introductionmentioning

confidence: 99%

New Arsenite Oxidase Gene (aioA) PCR Primers for Assessing Arsenite-Oxidizer Diversity in the Environment Using High-Throughput Sequencing

Qiao

et al. 2021

Front. Microbiol.

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Gene encoding the large subunit of As(III) oxidase (AioA), an important component of the microbial As(III) oxidation system, is a widely used biomarker to characterize As(III)-oxidizing communities in the environment. However, many studies were restricted to a few sequences generated by clone libraries and Sanger sequencing, which may have underestimated the diversity of As(III)-oxidizers in natural environments. In this study, we designed a primer pair, 1109F (5′-ATC TGG GGB AAY RAC AAY TA−3′) and 1548R (5′-TTC ATB GAS GTS AGR TTC AT−3′), targeting gene sequence encoding for the conserved molybdopterin center of the AioA protein, yielding amplicons approximately 450 bp in size that are feasible for highly parallel amplicon sequencing. By utilizing in silico analyses and the experimental construction of clone libraries using Sanger sequencing, the specificity and resolution of 1109F/1548R are approximated with two other previously published and commonly used primers, i.e., M1-2F/M3-2R and deg1F/deg1R. With the use of the 1109F/1548R primer pair, the taxonomic composition of the aioA genes was similar both according to the Sanger and next-generation sequencing (NGS) platforms. Furthermore, high-throughput amplicon sequencing using the primer pair, 1109F/1548R, successfully identified the well-known As(III)-oxidizers in paddy soils and sediments, and they also revealed the differences in the community structure and composition of As(III)-oxidizers in above two biotopes. The random forest analysis showed that the dissolved As(III) had the highest relative influence on the Chao1 index of the aioA genes. These observations demonstrate that the newly designed PCR primers enhanced the ability to detect the diversity of aioA-encoding microorganisms in environments using highly parallel short amplicon sequencing.

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Effects of Dissolved Organic Matter on the Bioavailability of Heavy Metals During Microbial Dissimilatory Iron Reduction: A Review

Gong

2021

Reviews of Environmental Contamination and Toxicology Volume 257

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Microbial driven iron reduction affects arsenic transformation and transportation in soil-rice system

Cited by 50 publications

References 72 publications

Arsenic biomineralization by iron oxidizing strain (Ochrobactrum sp.) isolated from a paddy soil in Hunan, China

Arsenic biomineralization by iron oxidizing strain (Ochrobactrum sp.) isolated from a paddy soil in Hunan, China

New Arsenite Oxidase Gene (aioA) PCR Primers for Assessing Arsenite-Oxidizer Diversity in the Environment Using High-Throughput Sequencing

Effects of Dissolved Organic Matter on the Bioavailability of Heavy Metals During Microbial Dissimilatory Iron Reduction: A Review

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