Immobilization and assessment of heavy metals in chicken manure compost amended with rice straw-derived biochar
文献类型： 外文期刊
作者： Li, Hui 1 ; Wu, Wei 2 ; Min, Xue 1 ; Zhan, Wenyong 3 ; Fang, Ting 4 ; Dong, Xinju 5 ; Shi, Yanhong 1 ;
作者机构： 1.Anhui Agr Univ, Sch Resources & Environm, Hefei, Anhui, Peoples R China
2.Anhui Acad Agr Sci, Agr Engn Res Inst, Hefei, Anhui, Peoples R China
3.Anhui Dechang Miao Mu Co LTD, Hefei, Anhui, Peoples R China
4.Anhui Acad Agr Sci, Fisheries Res Inst, Key Lab Freshwater Aquaculture & Enhancement Anhu, Hefei, Anhui, Peoples R China
5.Univ Louisville, Dept Chem, Louisville, KY 40292 USA
关键词： Compost; biochar; chemical speciation; risk assessment; heavy metals
期刊名称：ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY （ 影响因子：1.737； 五年影响因子：1.737 ）
ISSN： 2639-5932
年卷期： 2021 年 33 卷 1 期
页码：
收录情况： SCI
摘要： In this study, a 30-days laboratory experiment was implemented to investigate the impact of additive biochar on the stabilization of heavy metals in chicken manure compost. Results showed that after the addition of rice straw-derived biochar, heavy metals were more stabilized except Cu, of which the residual fractions distinctly decreased due to the interaction with organic functional groups from biochar. Given the bioavailability of heavy metals, the biochar addition at a 10% proportion decreased the concentration of CaCl2-extractable Cr, Zn, Ni, and Cd. Besides, CaCl2-extractable As did not differ significantly between treatments with and without biochar addition. Furthermore, the CaCl2-extractable Cu was higher than the control, in agreement with the observed changes in speciation. Environment pollution assessment by integrating potential ecological risk assessment explicated the chicken manure compost reached avery high-risk pollution level, and decreased with biochar addition. Therein, Cd was the dominant pollutant with very high potential risk.
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