Biochar enhances the microbial and chemical transformation of pentachlorophenol in paddy soil

Tong, Hui; Hu, Min; Li, F.B.; Liu, Chengshuai; Chen, M.J.

doi:10.1016/j.soilbio.2013.12.012

Cited by 184 publications

(64 citation statements)

References 53 publications

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“…Some other studies showed that biochar-derived dissolved organic matter could increase Fe/Mn oxide solubilization from soils via reductive dissolution, enhance Cr(VI) reduction, but promote As(III) oxidation (Dong et al 2014;Graber et al 2014;Tong et al 2014). These redox reactions caused by biochar addition play a considerable role in soil metal(loid)s availability due to potential formation of sulfide precipitation, loss of iron plaque, release of As from Fe/Mn oxide, etc..…”

Section: Discussionmentioning

confidence: 99%

Mitigating heavy metal accumulation into rice (Oryza sativa L.) using biochar amendment — a field experiment in Hunan, China

Zheng

Chen

Cai

et al. 2015

Environ Sci Pollut Res

138

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A field experiment was conducted to investigate the effect of bean stalk (BBC) and rice straw (RBC) biochars on the bioavailability of metal(loid)s in soil and their accumulation into rice plants. Phytoavailability of Cd was most dramatically influenced by biochars addition. Both biochars significantly decreased Cd concentrations in iron plaque (35-81 %), roots (30-75 %), shoots (43-79 %) and rice grain (26-71 %). Following biochars addition, Zinc concentrations in roots and shoots decreased by 25.0-44.1 and 19.9-44.2 %, respectively, although no significant decreases were observed in iron plaque and rice grain. Only RBC significantly reduced Pb concentrations in iron plaque (65.0 %) and roots (40.7 %). However, neither biochar significantly changed Pb concentrations in rice shoots and grain. Arsenic phytoavailability was not significantly altered by biochars addition. Calculation of hazard quotients (HQ) associated with rice consumption revealed RBC to represent a promising candidate to mitigate hazards associated with metal(loid) bioaccumulation. RBC reduced Cd HQ from a 5.5 to 1.6. A dynamic factor's way was also used to evaluate the changes in metal(loid) plant uptake process after the soil amendment with two types of biochar. In conclusion, these results highlight the potential for biochar to mitigate the phytoaccumulation of metal(loid)s and to thereby reduce metal(loid) exposure associated with rice consumption.

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Section: Discussionmentioning

confidence: 99%

Mitigating heavy metal accumulation into rice (Oryza sativa L.) using biochar amendment — a field experiment in Hunan, China

Zheng

Chen

Cai

et al. 2015

Environ Sci Pollut Res

138

View full text Add to dashboard Cite

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“…The filtrate was collected for highperformance liquid chromatography (HPLC) analysis of the PCP concentration. Details of the HPLC analysis are provided elsewhere (Lan et al 2008;Chen et al 2012;Wang et al 2012;Tong et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Essentially, in the anaerobic environment, PCP degradation is a microbial dechlorinated respiration process, during which the chlorinated compounds serve as terminal electron acceptors (Saia et al 2007;Payne et al 2011). In our previous study, Chen et al (2012) revealed that the dechlorinated products of degradation of PCP are 2,3,5,6-tetrachlorophenol (TeCP) and 2,3,5-trichlorophenol (TCP), and Tong et al (2014) also found the similar intermediates in dechlorination of PCP. According to these reports, PCP is expected to be dechlorinated under anaerobic conditions by microbes at the ortho-position (Bouchard et al 1996;Field and Sierra-Alvarez 2008).…”

Section: Introductionmentioning

confidence: 94%

Shifts in indigenous microbial communities during the anaerobic degradation of pentachlorophenol in upland and paddy soils from southern China

Chen

Tao

et al. 2016

Environ Sci Pollut Res

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Pentachlorophenol (PCP) is a common persistent pesticide in soil that has generated a significant environmental problem worldwide. Therefore, anaerobic degradation of PCP by the soil indigenous microbial community has gained increasing attention. However, little information is available concerning the functional microorganisms and the potential shifts in the microbial community associated with PCP degradation. In this study, we conducted a set of experiments to determine which components of the indigenous microbial community were capable of degrading PCP in soils of two land use types (upland and paddy soils) in southern China. Our results showed that the PCP degradation rate was significantly higher in paddy soils than that in upland soils. 16S ribosomal RNA (rRNA) high-throughput sequencing revealed significant differences in microbial taxonomic composition between the soil with PCP and blank (soil without PCP) with Acinetobacter, Clostridium, Coprococcus, Oxobacter, and Sedimentibacter dominating the PCP-affected communities. Acinetobacter was also apparently enriched in the paddy soils with PCP (up to 52.2 %) indicated this genus is likely to play an important role in PCP degradation. Additionally, the Fe(III)-reducing bacteria Clostridium may also be involved in PCP degradation. Our data further revealed hitherto unknown metabolisms of potential PCP degradation by microorganisms including Coprococcus, Oxobacter, and Ruminiclostridium. Overall, these findings indicated that land use types may affect the PCP anaerobic degradation rate via the activities of indigenous bacterial populations and extend our knowledge of the bacterial populations responsible for PCP degradation.

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“…The genomic DNA was extracted from the cells in triplicate from 2 ml of biochar or HA culture media using a PowerSoil TM DNA isolation kit (Mo Bio Laboratories, Carlsbad, CA, USA) according to the manufacturer's instructions (Tong et al 2014). The extracted DNA samples were quantified by real-time fluorescent quantitative PCR (qPCR) based on the 16S rRNA gene numbers of G. sulfurreducens as previously described (Tong et al 2014;Xu et al 2013).…”

Section: Real-time Quantitative Pcrmentioning

confidence: 99%

“…Moreover, recent studies revealed that biochar amended in paddy soil was a growth stimulant for Fe(III)-reducing and dechlorinating bacteria (Tong et al 2014). These results suggest that biochar might be involved in the MER.…”

Section: Introductionmentioning

confidence: 99%

Biochar as Electron Acceptor for Microbial Extracellular Respiration

Wang

Yuan

et al. 2016

Geomicrobiology Journal

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Biochar is a charred carbonaceous material that has recently been identified to provide many potential environmental and agricultural applications. Biochar amendments are shown to effectively improve the quality of soil and increase soil microbial biomass. However, the interactions between biochar and microorganisms and the mechanisms through which biochar influences soil microbial growth and activities remain unclear. In this study, we investigated the potential for biochar to function as an electron acceptor for microbial extracellular respiration and growth. Anaerobic incubation of Geobacter sulfurreducens revealed that biochar was used as a sole terminal electron acceptor, as evidenced by a 31-fold increase of biomass and gradual increase in reducing equivalents of biochar and the consumption of acetate after 15 d. An electron stoichiometry analysis showed that 58.7% of the electrons released from acetate oxidation could be recovered in biochar, which was comparable to that of humic substances (44.8%). The finding that biochar participates in microbial extracellular respiration may have important environmental implications considering the widespread existence of both extracellular-respiring microorganisms and black carbon in the environment.

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Biochar enhances the microbial and chemical transformation of pentachlorophenol in paddy soil

Cited by 184 publications

References 53 publications

Mitigating heavy metal accumulation into rice (Oryza sativa L.) using biochar amendment — a field experiment in Hunan, China

Mitigating heavy metal accumulation into rice (Oryza sativa L.) using biochar amendment — a field experiment in Hunan, China

Shifts in indigenous microbial communities during the anaerobic degradation of pentachlorophenol in upland and paddy soils from southern China

Biochar as Electron Acceptor for Microbial Extracellular Respiration

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