College of Geography and Environment, Shandong Normal University, Jinan 250358, China.
Int J Environ Res Public Health. 2023 Jan 19;20(3):1869. doi: 10.3390/ijerph20031869.
Reducing the mobility and bioavailability of heavy metals in soils by adding exogenous materials is a technology for remediating soils contaminated with heavy metals. Unlike industrial sites, the use of such techniques in agricultural soils requires consideration of not only reducing the mobility of heavy metals but also avoiding adverse effects on soil fertility and the growth of plants. Due to the uncertainty of the stability of amendments applied to agricultural soil, the application of amendments in farmland soil is controversial. This article reviewed the field studies in which amendments were used to immobilize heavy metals, and identified the potential environmental impacts of all aspects of soil amendment usage, including production and processing, transportation, storage, application to soil, long-term stability, and plant absorption. Results of the study indicated that after identifying the environmental risks of the whole process of the application of improvers in agricultural fields, it is necessary to classify the risks according to their characteristics, and design differentiated risk control measures for the safe application of this type of technology.
通过添加外源物质来降低土壤中重金属的迁移性和生物可利用性，是一种修复重金属污染土壤的技术。与工业场地不同，在农业土壤中使用此类技术不仅需要考虑降低重金属的迁移性，还要避免对土壤肥力和植物生长产生不利影响。由于施用于农业土壤的改良剂的稳定性存在不确定性，因此在农田土壤中应用改良剂存在争议。本文综述了将改良剂用于固定重金属的田间研究，并确定了土壤改良剂使用的各个方面，包括生产和加工、运输、储存、施用于土壤、长期稳定性和植物吸收，可能带来的潜在环境影响。研究结果表明，在确定农业领域改良剂应用全过程的环境风险后，有必要根据其特征对风险进行分类，并针对此类技术的安全应用设计差异化的风险控制措施。
