Enhanced bioreduction of iron and arsenic in sediment by biochar amendment influencing microbial community composition and dissolved organic matter content and composition

Chen, Zheng; Wang, Yuanpeng; Xia, Dong; Jiang, Xiuli; Fu, Dun; Shen, Liang; Wang, Haitao; Li, Qing Biao

doi:10.1016/j.jhazmat.2016.02.069

Cited by 189 publications

(49 citation statements)

References 52 publications

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“…A total of 10 cm 3 of the supernatants and 3.0 g of slurry were collected for the characterization of the properties of LDOM and SDOM. The extractive fraction of SDOM was collected by shaking the mixture of freeze‐dried slurry and the deionized water in a ratio of 1:10 (solid samples/water: weight/volume; Z. Chen et al, ). To obtain the filtrate of LDOM, SDOM, and dissolved organic carbon (DOC), the supernatants of LDOM and SDOM were filtered through a previously ignited 0.70‐μm glass fibre filter (Whatman, United Kingdom) to obtain the final corresponding filtrates.…”

Section: Methodsmentioning

confidence: 99%

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Addition of graphene sheets enhances reductive dissolution of arsenic and iron from arsenic contaminated soil

Chen

et al. 2018

Land Degrad Dev

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The deposition of slag from a realgar tailing mine has caused serious land degradation to those farming and mining coexisting areas. However, nanomaterial‐mediated biogeochemical arsenic cycle from arsenic‐enriched soil was severely limited. In this study, the environmental impact of graphene oxide (GO) and reduced GO (rGO) on the speciation and mobilization of Fe/As from the flooding of arsenic‐enriched soil was investigated. Regarding overall performance, rGO exhibited a more significant facilitation than GO on mediating microbial reduction of Fe(III)/As(V). The maximal levels of soluble Fe(II) and As(III) in the soil supplemented with acetate alone were 53.58 g.m−3 and 9592 mg·m−3 during the 50‐day culture period. Nearly 1.37‐fold and 1.15‐fold of As(III) levels were released when amending with rGO acetate and GO acetate. Meanwhile, approximately 1.40‐fold and 1.24‐fold of Fe(II) levels were released under the same conditions. The underlying mechanism was correlated with the interactions between graphene and microbial activities. The properties of GO have been evolved through microbial reduction and eventually exhibited characteristics similar to rGO. Additionally, the application of graphene potentially altered the compositions of the microbial community and increased the abundance of some metal‐reducing bacteria (e.g., Bacillus, Geobacter, and Desulfitobacterium), thereby favouring the dissolved organic matter bioavailability for bioreduction of Fe(III)/As(V). In addition, promotion of the electron transfer process of As(V)/Fe(III) reduction was predominantly responsible for the crucial role that rGO exhibited as a special redox‐active mediator and electrical conductor. These findings might provoke more consideration of the integrated ecological effects of graphene and evaluate their environmental impact on land degradation.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Addition of graphene sheets enhances reductive dissolution of arsenic and iron from arsenic contaminated soil

Chen

et al. 2018

Land Degrad Dev

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“…The pH was measured in a 1:1 suspension of solid and deionized water and shaken for 3 hours at 160 rpm. This test showed that all samples were alkaline ( spectrometry The surface physical morphology of the SBIO was analyzed using scanning electron microscopy (SEM) (Chen et al, 2016). The functional groups were recorded using Fourier transform infrared spectra (Chen et al, 2016).…”

Section: Sediment and Biochar Propertiesmentioning

confidence: 99%

“…The results from a series of field trials showed that the bioavailability of metals in soil and the metal concentrations in rice grains decreased by between 20% ~ 70%, and 20% ~ 60%, respectively, in soils treated with biochar (Wang et al, 2017). In terms of sediment, studies have addressed the effects of biochar on (1) mercury-related processes such as methylation and demethylation (Liu et al, 2016), (2) the fractions of Fe and As (Chen et al, 2016), and…”

Section: Introductionmentioning

confidence: 99%

“…It is well-known that, when incorporated into the lattice structures of minerals, heavy metals are stable and less bioavailable than weakly-bound labile metals. To date, a series of chemical methods, including porewater extraction, membrane extraction, and chemical reagent extraction, have been developed to facilitate rapid evaluation of the bioavailability of metals in soils or sediments (Chen et al, 2016;Yin et al, 2014;Zhang et al, 2001). In these methods, speciation analysis and leaching tests are based on the different abilities of chemical reagents to extract and classify metal geochemical fractions and evaluate their mobility and bioavailability, and membrane extraction is based on the equilibrium between the solid and liquid to assess the dissolved pollutants concentration and their resupply ability from solid phase.…”

Section: Introductionmentioning

confidence: 99%

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Assessing the capacity of biochar to stabilize copper and lead in contaminated sediments using chemical and extraction methods

Wang

Ren

Wang

et al. 2019

Journal of Environmental Sciences

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Succession of metabolically active Anaeromyxobacter community in flooded paddy soil owing to organic carbon input

Jia

et al. 2022

Soil Science Soc of Amer J

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Anaeromyxobacter spp. are prevalent and can make important contribution to microbial Fe(III) reduction in flooded paddy soils, which could be greatly regulated by exogenous organic C input. In this study, dynamics in the abundance and structure of metabolically active Anaeromyxobacter community based on RNA level were investigated by a 40-d anaerobic incubation of paddy soils amended with glucose at 0.1 and 0.5 mol C kg −1 soil, respectively. Compared with the control treatment, glucose additions generally showed obvious inhibitory effect on the Anaeromyxobacter growth; glucose addition at low concentration decreased the abundance of Anaeromyxobacter by 3.56 × 10 6 to 4.06 × 10 7 copies g -1 soil within the first 5 d of incubation, whereas a remarkable decrease by 4.54 × 10 6 to 7.71 × 10 7 copies g -1 soil occurred after paddy soils were amended with high glucose concentration. Anaeromyxobacter dehalogenans-like OTU_1 (where OTU stands for operational taxonomic unit) was dominant in the metabolically active Anaeromyxobacter community and showed significant and positive relationship with Fe(III) reduction process. The structure of Anaeromyxobacter community was greatly altered by glucose additions, and divergences mainly occurred after 5 d of incubation. Additionally, glucose additions could enhance interactions within the Anaeromyxobacter community, especially for positive correlations. In general, glucose addition could greatly inhibit the abundance and alter the structure of Anaeromyxobacter community by jointly decreasing soil pH; however, it could promote the final Fe(III) reduction by enhancing the utilization of Anaeromyxobacter to crystalline Fe oxide.

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Enhanced bioreduction of iron and arsenic in sediment by biochar amendment influencing microbial community composition and dissolved organic matter content and composition

Cited by 189 publications

References 52 publications

Addition of graphene sheets enhances reductive dissolution of arsenic and iron from arsenic contaminated soil

Addition of graphene sheets enhances reductive dissolution of arsenic and iron from arsenic contaminated soil

Assessing the capacity of biochar to stabilize copper and lead in contaminated sediments using chemical and extraction methods

Succession of metabolically active Anaeromyxobacter community in flooded paddy soil owing to organic carbon input

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