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Effect of sulfur-iron modified biochar on the available cadmium and bacterial community structure in contaminated soils.
Sci Total Environ. 2019 Jan 10; 647:1158-1168.ST

Abstract

Cadmium contamination in paddy soils has aroused increasing concern around the world, and biochar has many positive properties, such as large specific surface areas, micro porous structure for the heavy metal immobilization in soils. However there are few studies on sulfur-iron modified biochar as well as its microbiology effects. The purpose of this study was to evaluate the Cd immobilization effects of sulfur or sulfur-iron modified biochar and its related microbial community changes in Cd-contaminated soils. SEM-EDX analysis confirmed that sulfur and iron were loaded on the raw biochar successfully. Sulfur-modified biochar (S-BC) and sulfur-iron modified biochar (SF-BC) addition increased pH value and the content of soil organic matter, and also decreased DTPA-extractable Cd. There was a negative significant correlation between organic matter content and the available Cd (P < 0.05). During a 45-d incubation period, the fractions of Cd are mainly with the exchangeable (25.16-35.79%) and carbonate (22.01-25.10%) fractions. Compared with the control, the concentrations of exchangeable Cd in soil were significantly (P < 0.05) decreased by 12.54%, 29.71%, 18.53% under the treatments of BC, S-BC, SF-BC respectively. The S-BC and SF-BC treatments significantly (P < 0.05) increased Chao1, observed, Shannon and Simpson diversity indices compared with the control and biochar treatments. Meanwhile, the relative abundance of Proteobacteria, Bacteroidetes, and Actinobacteria increased, whereas the abundance of Acidobacteria and Germmatimonadetes decreased. Capsule: Sulfur-modified and sulfur-iron modified biochar applications decreased the available Cd and changed the microbial community.

Authors+Show Affiliations

School of Metallurgy and Environment, Central South University, Changsha 410083, PR China.School of Metallurgy and Environment, Central South University, Changsha 410083, PR China.School of Metallurgy and Environment, Central South University, Changsha 410083, PR China. Electronic address: sgxue@csu.edu.cn.Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong Special Administrative Region, PR China. Electronic address: waichin@eduhk.hk.School of Metallurgy and Environment, Central South University, Changsha 410083, PR China.School of Metallurgy and Environment, Central South University, Changsha 410083, PR China.School of Metallurgy and Environment, Central South University, Changsha 410083, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30180324

Citation

Wu, Chuan, et al. "Effect of Sulfur-iron Modified Biochar On the Available Cadmium and Bacterial Community Structure in Contaminated Soils." The Science of the Total Environment, vol. 647, 2019, pp. 1158-1168.
Wu C, Shi L, Xue S, et al. Effect of sulfur-iron modified biochar on the available cadmium and bacterial community structure in contaminated soils. Sci Total Environ. 2019;647:1158-1168.
Wu, C., Shi, L., Xue, S., Li, W., Jiang, X., Rajendran, M., & Qian, Z. (2019). Effect of sulfur-iron modified biochar on the available cadmium and bacterial community structure in contaminated soils. The Science of the Total Environment, 647, 1158-1168. https://doi.org/10.1016/j.scitotenv.2018.08.087
Wu C, et al. Effect of Sulfur-iron Modified Biochar On the Available Cadmium and Bacterial Community Structure in Contaminated Soils. Sci Total Environ. 2019 Jan 10;647:1158-1168. PubMed PMID: 30180324.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of sulfur-iron modified biochar on the available cadmium and bacterial community structure in contaminated soils. AU - Wu,Chuan, AU - Shi,Lizheng, AU - Xue,Shengguo, AU - Li,Waichin, AU - Jiang,Xingxing, AU - Rajendran,Manikandan, AU - Qian,Ziyan, Y1 - 2018/08/07/ PY - 2018/05/08/received PY - 2018/07/24/revised PY - 2018/08/06/accepted PY - 2018/9/6/pubmed PY - 2019/3/26/medline PY - 2018/9/6/entrez KW - Cadmium KW - Soil KW - Sulfur-iron modified biochar KW - Sulfur-modified biochar SP - 1158 EP - 1168 JF - The Science of the total environment JO - Sci Total Environ VL - 647 N2 - Cadmium contamination in paddy soils has aroused increasing concern around the world, and biochar has many positive properties, such as large specific surface areas, micro porous structure for the heavy metal immobilization in soils. However there are few studies on sulfur-iron modified biochar as well as its microbiology effects. The purpose of this study was to evaluate the Cd immobilization effects of sulfur or sulfur-iron modified biochar and its related microbial community changes in Cd-contaminated soils. SEM-EDX analysis confirmed that sulfur and iron were loaded on the raw biochar successfully. Sulfur-modified biochar (S-BC) and sulfur-iron modified biochar (SF-BC) addition increased pH value and the content of soil organic matter, and also decreased DTPA-extractable Cd. There was a negative significant correlation between organic matter content and the available Cd (P < 0.05). During a 45-d incubation period, the fractions of Cd are mainly with the exchangeable (25.16-35.79%) and carbonate (22.01-25.10%) fractions. Compared with the control, the concentrations of exchangeable Cd in soil were significantly (P < 0.05) decreased by 12.54%, 29.71%, 18.53% under the treatments of BC, S-BC, SF-BC respectively. The S-BC and SF-BC treatments significantly (P < 0.05) increased Chao1, observed, Shannon and Simpson diversity indices compared with the control and biochar treatments. Meanwhile, the relative abundance of Proteobacteria, Bacteroidetes, and Actinobacteria increased, whereas the abundance of Acidobacteria and Germmatimonadetes decreased. Capsule: Sulfur-modified and sulfur-iron modified biochar applications decreased the available Cd and changed the microbial community. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/30180324/Effect_of_sulfur_iron_modified_biochar_on_the_available_cadmium_and_bacterial_community_structure_in_contaminated_soils_ DB - PRIME DP - Unbound Medicine ER -