Effect of pyrolysis temperature of biochar on Cd, Pb and As bioavailability and bacterial community composition in contaminated paddy soil.

Autor: Wang Y; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China. Electronic address: cqwy68@163.com., Shen X; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China., Bian R; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China., Liu X; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China., Zheng J; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China., Cheng K; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China., Xuhui Z; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China., Li L; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China., Pan G; Institute of Resource, Ecosystem and Environment of Agriculture, department of Soil Science, College of Resources and Environmental Sciences, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Center of Biomass Green Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2022 Dec 01; Vol. 247, pp. 114237. Date of Electronic Publication: 2022 Oct 25.
DOI: 10.1016/j.ecoenv.2022.114237
Abstrakt: To further investigate the effect of pyrolysis temperature on bioavailable Cd, Pb and As, as well as the bacterial community structure in multi-metal(loid) contaminated paddy soil, six types of biochar derived from wood sawdust and peanut shell at 300 °C, 500 °C and 700 °C were prepared and incubated with Cd, Pb and As contaminated paddy soil for 45 days. The results showed that adding biochar decreased bioavailable Cd by 31.3%- 42.9%, Pb by 0.61-56.1%, while bioavailable As changed from 9.68 mg kg -1 to 9.55-10.84 mg kg -1 . We found that pyrolysis temperature of biochar had no significant effect on Cd bioavailability while Pb bioavailability decreased obviously with pyrolysis temperature raising. Biochar reduced the proportion of soluble and exchangeable Cd from 45.0% to 11.2-15.4% in comparison with the control, while no significant effect on the speciation of Pb and As. Wood sawdust biochar (WSBs) had more potential in decreasing bioavailable Cd and Pb than peanut shell biochar (PSBs). Although high-temperature biochar resulted a larger increase in bacterial species than low-and mid- temperature biochar, feedstock played a more important role in altering soil bacterial diversity and community composition than pyrolysis temperature. PSBs increased the diversity of soil bacteria through elevating soil dissolved carbon (DOC). Biochar altered soil bacterial community structure mainly by altering the level of soil electricity conductivity, DOC and bioavailable Cd. In addition, applying high-temperature PSBs increased the genus of bacteria that relevant to nitrogen cycling, such as Nitrospira, Nitrosotaleaceae and Candidatus_Nitrosotalea.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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