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基于多表面形态模型的土壤镉在小白菜中的富集效应

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屈晓泽, 许伟伟, 赵晓鹏, 朱泊静, 顾雪元. 基于多表面形态模型的土壤镉在小白菜中的富集效应[J]. 环境化学, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
引用本文: 屈晓泽, 许伟伟, 赵晓鹏, 朱泊静, 顾雪元. 基于多表面形态模型的土壤镉在小白菜中的富集效应[J]. 环境化学, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
shu
QU Xiaoze, XU Weiwei, ZHAO Xiaopeng, ZHU Bojing, GU Xueyuan. Accumulation of Cd in soil-cabbage system based on multi-surface speciation model[J]. Environmental Chemistry, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
Citation: QU Xiaoze, XU Weiwei, ZHAO Xiaopeng, ZHU Bojing, GU Xueyuan. Accumulation of Cd in soil-cabbage system based on multi-surface speciation model[J]. Environmental Chemistry, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
shu

基于多表面形态模型的土壤镉在小白菜中的富集效应

  • 1. 南京大学环境学院, 南京, 210023;

  • 2. 江苏省地质调查研究院, 南京, 210018;

  • 3. 自然资源部国土(耕地)生态监测与修复工程技术创新中心, 南京, 210018

    • 通讯作者: 顾雪元, E-mail: xygu@nju.edu.cn
  • 基金项目:

    国家重点研发专项（2018YFC1800602）和国家自然科学基金（21876080，21577062）资助.

Accumulation of Cd in soil-cabbage system based on multi-surface speciation model

  • 1. School of the Environment, Nanjing University, Nanjing, 210023, China;

  • 2. Geological Survey of Jiangsu Province, Nanjing, 210018, China;

  • 3. Technical Inovation Center of Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Rsesource, Nanjing, 210018, China

    • Corresponding author: GU Xueyuan, xygu@nju.edu.cn
  • Fund Project: Supported by National Key Research and Development Programs(2018YFC1800602)and the Natural Science Foundation of China(21876080, 21577062).

  • 摘要: 基于土壤理化性质和热力学化学平衡的多表面形态模型（multi-surface speciation model，MSM）近年来已成功被应用于描述多种痕量元素在土壤固/液相间的分配，但在土壤-植物系统中的应用尚不多见.本文采用室内盆栽实验，调查了我国6种代表性土壤中Cd（Ⅱ）在小白菜中的生物富集情况，首先比较了5种化学提取方法（总Cd、CaCl2、HNO3、Mehlich-3和BCR）测定的有效态Cd与小白菜中Cd富集量之间的相关性，其次基于MSM预测土壤中溶解态Cd（Ⅱ）浓度并与Cd在白菜中富集量进行了相关性分析，同时考察了不同模型架构下模型对相关性的影响.结果表明，MSM预测的土壤中溶解态Cd浓度与小白菜中Cd富集量之间有较好的相关性，大部分模型架构下优于化学提取法，说明MSM一定程度上反映了土壤理化性质对Cd生物有效性的影响.由于MSM在计算过程中基于热力学参数，因此具有很好的外延性，说明其在土壤-植物系统中重金属生物有效性和风险评价方面具有较大的潜力.
    Abstract: In recent years, Multi-surface Speciation Model (MSM) based on thermodynamic chemical equilibrium and soil properties has been applied successfully in the description of the solid-solution partition of some describe trace elements in soils. However, its application in the soil-plant system has not been fully explored. In this study, pot experiments were carried out to investigate Cd(Ⅱ) accumulation in soil-cabbage system using 6 soils with various properties from China. Firstly, the correlation of bioavailable Cd(Ⅱ) in soil and the accumulation amount in cabbage was measured by five chemical extraction methods in order to evaluate the feasibility. Secondly, the relationship of soluble Cd(Ⅱ) concentration in soil and the bioaccumulation Cd(Ⅱ) in cabbage was analyzed by the prediction of MSM. Meanwhile, the study also explored the influence of different model composition. The results demonstrate that the dissolved Cd(Ⅱ) predicted by MSM in most composition showed better correlation with Cd in cabbage than chemical extraction methods, indicating the MSM can assess the effect of soil properties on Cd bioavailability. Because MSM calculation is based on thermodynamic parameters, it is easy to be extrapolated to other soil system. The feasibility of MSM in the soil-plant system makes it a promising tool in soil risk assessment for heavy metals.
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  • 收稿日期:  2019-02-20
屈晓泽, 许伟伟, 赵晓鹏, 朱泊静, 顾雪元. 基于多表面形态模型的土壤镉在小白菜中的富集效应[J]. 环境化学, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
引用本文: 屈晓泽, 许伟伟, 赵晓鹏, 朱泊静, 顾雪元. 基于多表面形态模型的土壤镉在小白菜中的富集效应[J]. 环境化学, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
shu
QU Xiaoze, XU Weiwei, ZHAO Xiaopeng, ZHU Bojing, GU Xueyuan. Accumulation of Cd in soil-cabbage system based on multi-surface speciation model[J]. Environmental Chemistry, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
Citation: QU Xiaoze, XU Weiwei, ZHAO Xiaopeng, ZHU Bojing, GU Xueyuan. Accumulation of Cd in soil-cabbage system based on multi-surface speciation model[J]. Environmental Chemistry, 2019, (9): 1945-1954. doi: 10.7524/j.issn.0254-6108.2019022001
shu

基于多表面形态模型的土壤镉在小白菜中的富集效应

    通讯作者: 顾雪元, E-mail: xygu@nju.edu.cn
  • 1. 南京大学环境学院, 南京, 210023;
  • 2. 江苏省地质调查研究院, 南京, 210018;
  • 3. 自然资源部国土(耕地)生态监测与修复工程技术创新中心, 南京, 210018
  • 收稿日期:  2019-02-20
基金项目:

国家重点研发专项（2018YFC1800602）和国家自然科学基金（21876080，21577062）资助.

摘要: 基于土壤理化性质和热力学化学平衡的多表面形态模型（multi-surface speciation model，MSM）近年来已成功被应用于描述多种痕量元素在土壤固/液相间的分配，但在土壤-植物系统中的应用尚不多见.本文采用室内盆栽实验，调查了我国6种代表性土壤中Cd（Ⅱ）在小白菜中的生物富集情况，首先比较了5种化学提取方法（总Cd、CaCl2、HNO3、Mehlich-3和BCR）测定的有效态Cd与小白菜中Cd富集量之间的相关性，其次基于MSM预测土壤中溶解态Cd（Ⅱ）浓度并与Cd在白菜中富集量进行了相关性分析，同时考察了不同模型架构下模型对相关性的影响.结果表明，MSM预测的土壤中溶解态Cd浓度与小白菜中Cd富集量之间有较好的相关性，大部分模型架构下优于化学提取法，说明MSM一定程度上反映了土壤理化性质对Cd生物有效性的影响.由于MSM在计算过程中基于热力学参数，因此具有很好的外延性，说明其在土壤-植物系统中重金属生物有效性和风险评价方面具有较大的潜力.

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