Bioavailability of cadmium in paddy soils around typical mining area

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Apr.2024, Vol.47 No.4: 508-515

DOI: 10.3969/j.issn.1003-5060.2024.04.012

Authors

XU Jingye $ ^{1} $, LI Xiangling $ ^{1,2} $, LU Xinzhe $ ^{3,4} $, ZHANG Zijian $ ^{1} $, WEI Yingchun $ ^{3,4} $

(1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, China; 3. Technology Innovation Center of Ecological Evaluation and Remediation of Agricultural Land in Plain Area, Ministry of Natural Resources, Hangzhou 311200, China; 4. Zhejiang Institute of Geological Survey, Hangzhou 311200, China)

Abstract and Keywords

Abstract: To select indicators that can effectively characterize the bioavailability of cadmium(Cd) in farmland soil, this paper, based on 20 sets of rice and its synergistic soil from an area in Zhejiang Province, analyzed the Cd content of rice, the basic physical and chemical properties of soil, the total amount of Cd, the Cd content of different extractable states and the European Community Bureau of Reference(BCR) form. The results show that the Cd content of rice is 0.01-0.51 mg/kg, the Cd content of soil is 0.17-3.15 mg/kg, the bioconcentration factor of Cd in rice is 0.04-1.42; the soil Cd is mainly in acid-soluble states (40.5%) and reducible states (37.1%), diethylenetriaminepentaacetic acid(DTPA) has the strongest ability to extract soil Cd (15.6%); the regression model based on the cubic function constructed by $ w(\mathrm{CaCl}_{2}-\mathrm{Cd}) $ can explain 57.4% variance of Cd in rice, hence $ w(\mathrm{CaCl}_{2}-\mathrm{Cd}) $ is preferably chosen as an indicator of Cd bioavailability in rice soil, and research based on the Cd bioavailability in rice soil can make pollution risk assessment more scientific.

Keywords: soil; fractionation; bioavailability; cadmium(Cd); rice

作者信息

徐景烨 $ ^{1} $，李湘凌 $ ^{1,2} $，卢新哲 $ ^{3,4} $，张子健 $ ^{1} $，魏迎春 $ ^{3,4} $

(1. 合肥工业大学资源与环境工程学院，安徽合肥 230009；2. 安徽省矿产资源与矿山环境工程技术研究中心，安徽合肥 230009；3. 自然资源部平原区农用地生态评价与修复工程技术创新中心，浙江杭州 311200；4. 浙江省地质调查院，浙江杭州 311200)

摘要和关键词

摘要: 为遴选可有效表征农田土壤Cd生物有效性的指标,文章采集浙江某地20组稻米及其协同土壤,分析稻米Cd质量比、土壤的基本理化性质、Cd总质量比、不同浸提态Cd质量比及欧共体标准物质局(European Community Bureau of Reference, BCR)形态。结果表明:稻米Cd质量比为0.01~0.51 mg/kg,土壤Cd质量比为0.17~3.15 mg/kg,稻米Cd富集系数为0.04~1.42;土壤Cd主要以弱酸态(40.5%)和还原态(37.1%)存在,二乙烯三胺五乙酸(diethylenetriaminepentaacetic acid, DTPA)浸提土壤Cd能力最强(15.6%);基于 $ \omega(\mathrm{CaCl}_{2}-\mathrm{Cd}) $构建的三次函数建立的回归模型可解释稻米Cd 57.4%方差, $ \omega(\mathrm{CaCl}_{2}-\mathrm{Cd}) $可以作为表征水稻土壤Cd生物有效性的指标,基于水稻土壤Cd生物有效性可提高污染风险评价的科学性。

关键词: 土壤；形态；生物有效性；Cd；水稻

Funding

浙江省重点研发计划资助项目（2021C04020）；浙江省自然资源厅科技资助项目（202045）和浙江省地勘资金资助项目（2019007；2020006）

合肥工业大学学报(自然科学版)

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