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Cd immobilization in a contaminated rice paddy by inorganic stabilizers of calcium hydroxide and silicon slag and by organic stabilizer of biochar.
Environ Sci Pollut Res Int. 2016 May; 23(10):10028-36.ES

Abstract

A field experiment was conducted in a Cd-contaminated rice paddy field to evaluate the effect of inorganic and organic metal stabilizers on Cd mobility and rice uptake. A dose of inorganic stabilizer of calcium hydroxide (CH), silicon slag (SS), and wheat straw biochar (BC) was amended respectively to topsoil before rice transplanting. Rice production was managed with the same water regime and fertilization practices consistently between treatments including a control without amendment. Samples of topsoil and rice plant were collected at rice harvest to analyze the Cd mobility and uptake by rice. Without affecting rice grain yield, the stabilizers significantly decreased CaCl2-extractable Cd in a range of 44 to 75 % compared to the control, corresponding to soil pH changes under the different treatments. Accordingly, Cd concentrations both in rice tissue and in rice grain were very significantly decreased under these treatments. The decrease in rice Cd uptake was correlated to the decrease in extractable Cd, which was again correlated to soil pH change under the different treatments, indicating a prevalent role of liming effect by the amendments. While applied at a large amount in a single year, organic stabilizer of BC decreased Cd extractability by up to 43 % and Cd rice uptake by up to 61 %, being the most effective on Cd immobilization. However, the long-term effect on soil health and potential tradeoff effects with different stabilizers deserve further field monitoring studies.

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Authors+Show Affiliations

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, 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.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, 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.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.

Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China. gxpan1@hotmail.com. Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China. gxpan1@hotmail.com.

MeSH

CadmiumCalcium HydroxideCharcoalCost-Benefit AnalysisEnvironmental Restoration and RemediationHydrogen-Ion ConcentrationOryzaSiliconSoil Pollutants

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26865487

Citation

Bian, Rongjun, et al. "Cd Immobilization in a Contaminated Rice Paddy By Inorganic Stabilizers of Calcium Hydroxide and Silicon Slag and By Organic Stabilizer of Biochar." Environmental Science and Pollution Research International, vol. 23, no. 10, 2016, pp. 10028-36.

Bian R, Li L, Bao D, et al. Cd immobilization in a contaminated rice paddy by inorganic stabilizers of calcium hydroxide and silicon slag and by organic stabilizer of biochar. Environ Sci Pollut Res Int. 2016;23(10):10028-36.

Bian, R., Li, L., Bao, D., Zheng, J., Zhang, X., Zheng, J., Liu, X., Cheng, K., & Pan, G. (2016). Cd immobilization in a contaminated rice paddy by inorganic stabilizers of calcium hydroxide and silicon slag and by organic stabilizer of biochar. Environmental Science and Pollution Research International, 23(10), 10028-36. https://doi.org/10.1007/s11356-016-6214-3

Bian R, et al. Cd Immobilization in a Contaminated Rice Paddy By Inorganic Stabilizers of Calcium Hydroxide and Silicon Slag and By Organic Stabilizer of Biochar. Environ Sci Pollut Res Int. 2016;23(10):10028-36. PubMed PMID: 26865487.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Cd immobilization in a contaminated rice paddy by inorganic stabilizers of calcium hydroxide and silicon slag and by organic stabilizer of biochar. AU - Bian,Rongjun, AU - Li,Lianqing, AU - Bao,Dandan, AU - Zheng,Jinwei, AU - Zhang,Xuhui, AU - Zheng,Jufeng, AU - Liu,Xiaoyu, AU - Cheng,Kun, AU - Pan,Genxing, Y1 - 2016/02/11/ PY - 2015/11/16/received PY - 2016/01/31/accepted PY - 2016/2/12/entrez PY - 2016/2/13/pubmed PY - 2017/3/11/medline KW - Biochar KW - Cadmium KW - Metal stabilizer KW - Rice paddy KW - Soil mobility SP - 10028 EP - 36 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 23 IS - 10 N2 - A field experiment was conducted in a Cd-contaminated rice paddy field to evaluate the effect of inorganic and organic metal stabilizers on Cd mobility and rice uptake. A dose of inorganic stabilizer of calcium hydroxide (CH), silicon slag (SS), and wheat straw biochar (BC) was amended respectively to topsoil before rice transplanting. Rice production was managed with the same water regime and fertilization practices consistently between treatments including a control without amendment. Samples of topsoil and rice plant were collected at rice harvest to analyze the Cd mobility and uptake by rice. Without affecting rice grain yield, the stabilizers significantly decreased CaCl2-extractable Cd in a range of 44 to 75 % compared to the control, corresponding to soil pH changes under the different treatments. Accordingly, Cd concentrations both in rice tissue and in rice grain were very significantly decreased under these treatments. The decrease in rice Cd uptake was correlated to the decrease in extractable Cd, which was again correlated to soil pH change under the different treatments, indicating a prevalent role of liming effect by the amendments. While applied at a large amount in a single year, organic stabilizer of BC decreased Cd extractability by up to 43 % and Cd rice uptake by up to 61 %, being the most effective on Cd immobilization. However, the long-term effect on soil health and potential tradeoff effects with different stabilizers deserve further field monitoring studies. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/26865487/Cd_immobilization_in_a_contaminated_rice_paddy_by_inorganic_stabilizers_of_calcium_hydroxide_and_silicon_slag_and_by_organic_stabilizer_of_biochar_ DB - PRIME DP - Unbound Medicine ER -