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Effects of combined amendments on heavy metal accumulation in rice (Oryza sativa L.) planted on contaminated paddy soil.
Ecotoxicol Environ Saf. 2014 Mar; 101:226-32.EE

Abstract

Stabilization of heavy metals in situ was investigated. Two combined amendments (LS, limestone+sepiolite; HZ, hydroxyhistidine+zeolite) were applied at ratios of 0.2%, 0.4%, and 0.8% (w/w) to paddy soil with multi-metal (Pb, Cd, Cu, and Zn) contamination. The effects of these two combined amendments on heavy metal bioavailability in soil, and on uptake and accumulation of heavy metals in rice plants were investigated. Application of LS and HZ significantly increased soil pH values and cation exchange capacity contents, and resulted in a reduction in exchangeable fraction of metals and in extract metal concentrations of amended soils through toxicity characteristic leaching procedure (TCLP). LS and HZ obviously inhibited uptake and accumulation of Pb, Cd, Cu, and Zn in rice plants. Compared with the control soil, concentrations of Pb, Cd, Cu, and Zn in brown rice were decreased by 10.6-31.8%, 16.7-25.5%, 11.5-22.1%, and 11.7-16.3%, respectively, as a result of 0.2% to 0.8% addition of LS, and decreased by 5.1-40.8%, 16.7-20.0%, 8.1-16.2%, and 13.3-21.7%, respectively, as a result of 0.2-0.8% addition of HZ. Significant positive linear correlations were found between heavy metal concentrations in TCLP extracts and those in rice tissues except for Pb. Extracting heavy metals with TCLP was a more suitable method for estimating heavy metal bioavailability concentrations of amended soil than exchangeable fraction of heavy metals, because the latter underestimated heavy metal bioavailability. These results demonstrate that LS and HZ could be effective in reducing heavy metal bioavailability and accumulation in rice grown on multi-metal-contaminated soils.

Authors+Show Affiliations

Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; College of Bioscience and Technology, Hunan Agricultural University, Changsha 410128, China.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China. Electronic address: liaobh1020@163.com.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.Institute of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24507150

Citation

Zhou, Hang, et al. "Effects of Combined Amendments On Heavy Metal Accumulation in Rice (Oryza Sativa L.) Planted On Contaminated Paddy Soil." Ecotoxicology and Environmental Safety, vol. 101, 2014, pp. 226-32.
Zhou H, Zhou X, Zeng M, et al. Effects of combined amendments on heavy metal accumulation in rice (Oryza sativa L.) planted on contaminated paddy soil. Ecotoxicol Environ Saf. 2014;101:226-32.
Zhou, H., Zhou, X., Zeng, M., Liao, B. H., Liu, L., Yang, W. T., Wu, Y. M., Qiu, Q. Y., & Wang, Y. J. (2014). Effects of combined amendments on heavy metal accumulation in rice (Oryza sativa L.) planted on contaminated paddy soil. Ecotoxicology and Environmental Safety, 101, 226-32. https://doi.org/10.1016/j.ecoenv.2014.01.001
Zhou H, et al. Effects of Combined Amendments On Heavy Metal Accumulation in Rice (Oryza Sativa L.) Planted On Contaminated Paddy Soil. Ecotoxicol Environ Saf. 2014;101:226-32. PubMed PMID: 24507150.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of combined amendments on heavy metal accumulation in rice (Oryza sativa L.) planted on contaminated paddy soil. AU - Zhou,Hang, AU - Zhou,Xin, AU - Zeng,Min, AU - Liao,Bo-Han, AU - Liu,Li, AU - Yang,Wen-Tao, AU - Wu,Yan-Ming, AU - Qiu,Qiong-Yao, AU - Wang,Ying-Jie, Y1 - 2014/01/25/ PY - 2013/10/31/received PY - 2014/01/05/revised PY - 2014/01/06/accepted PY - 2014/2/11/entrez PY - 2014/2/11/pubmed PY - 2014/3/29/medline KW - Bioavailability KW - Combined amendment KW - Heavy metals KW - Rice (Oryza sativa L.) KW - Soil SP - 226 EP - 32 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 101 N2 - Stabilization of heavy metals in situ was investigated. Two combined amendments (LS, limestone+sepiolite; HZ, hydroxyhistidine+zeolite) were applied at ratios of 0.2%, 0.4%, and 0.8% (w/w) to paddy soil with multi-metal (Pb, Cd, Cu, and Zn) contamination. The effects of these two combined amendments on heavy metal bioavailability in soil, and on uptake and accumulation of heavy metals in rice plants were investigated. Application of LS and HZ significantly increased soil pH values and cation exchange capacity contents, and resulted in a reduction in exchangeable fraction of metals and in extract metal concentrations of amended soils through toxicity characteristic leaching procedure (TCLP). LS and HZ obviously inhibited uptake and accumulation of Pb, Cd, Cu, and Zn in rice plants. Compared with the control soil, concentrations of Pb, Cd, Cu, and Zn in brown rice were decreased by 10.6-31.8%, 16.7-25.5%, 11.5-22.1%, and 11.7-16.3%, respectively, as a result of 0.2% to 0.8% addition of LS, and decreased by 5.1-40.8%, 16.7-20.0%, 8.1-16.2%, and 13.3-21.7%, respectively, as a result of 0.2-0.8% addition of HZ. Significant positive linear correlations were found between heavy metal concentrations in TCLP extracts and those in rice tissues except for Pb. Extracting heavy metals with TCLP was a more suitable method for estimating heavy metal bioavailability concentrations of amended soil than exchangeable fraction of heavy metals, because the latter underestimated heavy metal bioavailability. These results demonstrate that LS and HZ could be effective in reducing heavy metal bioavailability and accumulation in rice grown on multi-metal-contaminated soils. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/24507150/Effects_of_combined_amendments_on_heavy_metal_accumulation_in_rice__Oryza_sativa_L___planted_on_contaminated_paddy_soil_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(14)00004-9 DB - PRIME DP - Unbound Medicine ER -