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Effect of peanut shell and wheat straw biochar on the availability of Cd and Pb in a soil-rice (Oryza sativa L.) system.
Environ Sci Pollut Res Int. 2018 Jan; 25(2):1147-1156.ES

Abstract

Soil amendments, such as biochar, have been used to enhance the immobilization of heavy metals in contaminated soil. A pot experiment was conducted to immobilize the available cadmium (Cd) and lead (Pb) in soil using peanut shell biochar (PBC) and wheat straw biochar (WBC), and to observe the accumulation of these heavy metals in rice (Oryza sativa L.). The application of PBC and WBC led to significantly higher pH, soil organic carbon (SOC), and cation exchange capacity (CEC) in paddy soil, while the content of MgCl2-extractable Cd and Pb was lower than that of untreated soil. MgCl2-extractable Cd and Pb showed significant negative correlations with pH, SOC, and CEC (p < 0.01). The application of 5% biochar to contaminated paddy soil led to reductions of 40.4-45.7 and 68.6-79.0%, respectively, in the content of MgCl2-extractable Cd and Pb. PBC more effectively immobilized Cd and Pb than WBC. Sequential chemical extractions revealed that biochar induced the transformation of the acid-soluble fraction of Cd to oxidizable and residual fractions, and the acid-soluble fraction of Pb to reducible and residual fractions. PBC and WBC clearly inhibited the uptake and accumulation of Cd and Pb in rice plants. Specially, when compared to the corresponding concentrations in rice grown in control soils, 5% PBC addition lowered Cd and Pb concentrations in grains by 22.9 and 12.2%, respectively, while WBC addition lowered them by 29.1 and 15.0%, respectively. Compared to Pb content, Cd content was reduced to a greater extent in grain by PBC and WBC. These results suggest that biochar application is effective for immobilizing Cd and Pb in contaminated paddy soil, and reduces their bioavailability in rice. Biochar could be used as a soil amendment for the remediation of soils contaminated with heavy metals.

Authors+Show Affiliations

Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China. xuchao1388@126.com. College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China. xuchao1388@126.com.College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China.Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 10085, China.Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China.Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China.Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China.Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China.College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China. zhangyangzhu2006@163.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29079982

Citation

Xu, Chao, et al. "Effect of Peanut Shell and Wheat Straw Biochar On the Availability of Cd and Pb in a Soil-rice (Oryza Sativa L.) System." Environmental Science and Pollution Research International, vol. 25, no. 2, 2018, pp. 1147-1156.
Xu C, Chen HX, Xiang Q, et al. Effect of peanut shell and wheat straw biochar on the availability of Cd and Pb in a soil-rice (Oryza sativa L.) system. Environ Sci Pollut Res Int. 2018;25(2):1147-1156.
Xu, C., Chen, H. X., Xiang, Q., Zhu, H. H., Wang, S., Zhu, Q. H., Huang, D. Y., & Zhang, Y. Z. (2018). Effect of peanut shell and wheat straw biochar on the availability of Cd and Pb in a soil-rice (Oryza sativa L.) system. Environmental Science and Pollution Research International, 25(2), 1147-1156. https://doi.org/10.1007/s11356-017-0495-z
Xu C, et al. Effect of Peanut Shell and Wheat Straw Biochar On the Availability of Cd and Pb in a Soil-rice (Oryza Sativa L.) System. Environ Sci Pollut Res Int. 2018;25(2):1147-1156. PubMed PMID: 29079982.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of peanut shell and wheat straw biochar on the availability of Cd and Pb in a soil-rice (Oryza sativa L.) system. AU - Xu,Chao, AU - Chen,Hao-Xiang, AU - Xiang,Qian, AU - Zhu,Han-Hua, AU - Wang,Shuai, AU - Zhu,Qi-Hong, AU - Huang,Dao-You, AU - Zhang,Yang-Zhu, Y1 - 2017/10/27/ PY - 2017/04/19/received PY - 2017/10/16/accepted PY - 2017/10/29/pubmed PY - 2018/11/6/medline PY - 2017/10/29/entrez KW - Bioavailability KW - Biochar KW - Contaminated paddy soil KW - Heavy metals KW - Rice SP - 1147 EP - 1156 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 25 IS - 2 N2 - Soil amendments, such as biochar, have been used to enhance the immobilization of heavy metals in contaminated soil. A pot experiment was conducted to immobilize the available cadmium (Cd) and lead (Pb) in soil using peanut shell biochar (PBC) and wheat straw biochar (WBC), and to observe the accumulation of these heavy metals in rice (Oryza sativa L.). The application of PBC and WBC led to significantly higher pH, soil organic carbon (SOC), and cation exchange capacity (CEC) in paddy soil, while the content of MgCl2-extractable Cd and Pb was lower than that of untreated soil. MgCl2-extractable Cd and Pb showed significant negative correlations with pH, SOC, and CEC (p < 0.01). The application of 5% biochar to contaminated paddy soil led to reductions of 40.4-45.7 and 68.6-79.0%, respectively, in the content of MgCl2-extractable Cd and Pb. PBC more effectively immobilized Cd and Pb than WBC. Sequential chemical extractions revealed that biochar induced the transformation of the acid-soluble fraction of Cd to oxidizable and residual fractions, and the acid-soluble fraction of Pb to reducible and residual fractions. PBC and WBC clearly inhibited the uptake and accumulation of Cd and Pb in rice plants. Specially, when compared to the corresponding concentrations in rice grown in control soils, 5% PBC addition lowered Cd and Pb concentrations in grains by 22.9 and 12.2%, respectively, while WBC addition lowered them by 29.1 and 15.0%, respectively. Compared to Pb content, Cd content was reduced to a greater extent in grain by PBC and WBC. These results suggest that biochar application is effective for immobilizing Cd and Pb in contaminated paddy soil, and reduces their bioavailability in rice. Biochar could be used as a soil amendment for the remediation of soils contaminated with heavy metals. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/29079982/Effect_of_peanut_shell_and_wheat_straw_biochar_on_the_availability_of_Cd_and_Pb_in_a_soil_rice__Oryza_sativa_L___system_ DB - PRIME DP - Unbound Medicine ER -