生物质炭钝化农田土壤镉的若干研究进展

利用生物质炭治理农田镉污染是农业和环境界关注的热点。本文综述了近年来生物质炭对污染土壤中镉的生物有效性以及对作物镉吸收的影响等方面的研究进展,阐述了生物质炭钝化土壤中镉的多作用机制,分析探讨了影响镉钝化效应的生物质炭性质、土壤和管理因素,提出了提升钝化材料性能并改善管理以提高生物质炭钝化的高效性和持效性机制,建议未来该领域应加强生物质炭大田长期定位试验研究,以进一步为生物质炭污染治理提供科学依据。

Several research progresses in Cd inactivation by biochar application in agricultural soil

The application of biochar for Cd pollution remediation in agriculture soil is a hot topic of concern. This paper reviewed the study progress in several aspects, including the impacts of biochar on Cd bioavailability in polluted soil and Cd uptake in plants. Meanwhile, we expounded the multi-mechanism for inactivation of cadmium by biochar and discussed the influencing factors from the aspects of properties of biochar, soil and management factors. The analysis results suggested that the mechanisms for high-efficiency and sustainable inactivation performance of biochar could be realized by improving materials properties and management. Finally, we proposed that long-term location field experiments should be enhanced in this area to provide further scientific evidence for pollution remediation with biochar.