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| Safe utilization of farmland soil with cadmium pollution: strategies and deliberations. |
Long MENG1( ),Tuhai HUANG1,Jian CHEN2,Fulin ZHONG3,Jiachun SHI1(),Jianming XU1 |
1. Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
2. Agricultural & Forestry Bureau of Wenling, Wenling 317500, Zhejiang, China
3. Agricultural Public Service Center of Zeguo, Wenling 317500, Zhejiang, China |
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Abstract The cadmium pollution in farmland soils of China has posed a potential threat to food safety and human health. Based on the analysis of sources, status and harms of cadmium pollution in farmland soils, we summarized related technologies and application status of safe utilization of farmland soils with Cd pollution, including screening of low cadmium accumulation crop, in situ immobilization technology, agronomic measures and comprehensive prevention and control patterns. Meanwhile, the safe utilization of farmland soils with cadmium pollution faces many problems including significant regional differences, insufficient pollution source control, incomplete process interception, limited prevention and control technologies and lack of risk evaluation system. Furthermore, corresponding suggestions were proposed towards the control of farmland soils with cadmium pollution in China.
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Received: 08 March 2018
Published: 25 June 2019
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Corresponding Authors:
Jiachun SHI
E-mail: lmeng2017@zju.edu.cn;jcshi@zju.edu.cn
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镉污染农田土壤安全利用策略及其思考
我国农田土壤镉（Cd）污染形势日益严峻，已对粮食安全及人体健康构成威胁。该文分析了我国农田土壤Cd污染的来源、污染现状及主要危害，从Cd低积累作物品种筛选、原位钝化技术、农艺措施调控及综合防控-安全利用模式等角度总结了Cd污染农田土壤安全利用的相关技术应用现状。在此基础上，提出了在Cd污染农田土壤安全利用过程中尚存在区域差异显著、源头管控不足、过程拦截不到位、末端治理技术的局限性及修复治理评价机制缺失等问题，认为今后应当从建立分区分类污染防治体系，重视污染源解析与源头管控，规范农业生产过程管理、技术完善、集成与应用及建立健全的防治效果评估机制等方面推进Cd污染农田土壤安全利用工作。
关键词：
农田土壤,
镉污染,
安全利用,
粮食安全
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