Institute of Process Equipment and Environmental Engineering, School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China; Department of Mechanical and Mathematical Engineering, Kumamoto University, Kumamoto 860-8555, Japan.
Institute of Process Equipment and Environmental Engineering, School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China.
Bioresour Technol. 2024 Oct;410:131292. doi: 10.1016/j.biortech.2024.131292. Epub 2024 Aug 15.
Due to high humification, hyperthermophilic composting products (HP) show potential for remediating heavy metal pollution. However, the interaction between HP and heavy metals remains unclear. This study investigated the adsorption mechanism and soil remediation effect of HP on heavy metals. The results showed that the maximum adsorption capacity of HP increased by an average of 30.74 % compared to conventional composting products. HP transformed 34.87 % of copper, 42.55 % of zinc, and 35.63 % of lead from exchangeable and reducible forms into residual and oxidizable forms, thus reducing the soil risk level. In conclusion, HP significantly enhanced the adsorption of heavy metals and their transformation from unstable to stable forms, primarily due to the higher content of hydroxyl and carboxyl groups. This study aims to demonstrate the effectiveness of HP for remediating heavy metal pollution and to enhance the understanding of the underlying mechanism, which lays a foundation for waste utilization.
由于高度腐殖化，高温堆肥产品（HP）显示出修复重金属污染的潜力。然而，HP 与重金属之间的相互作用仍不清楚。本研究调查了 HP 对重金属的吸附机制和土壤修复效果。结果表明，与传统堆肥产品相比，HP 的最大吸附容量平均增加了 30.74%。HP 将 34.87%的铜、42.55%的锌和 35.63%的铅从可交换和可还原形式转化为残余和可氧化形式，从而降低了土壤风险水平。总之，HP 显著增强了重金属的吸附及其从不稳定向稳定形式的转化，主要归因于其更高的羟基和羧基含量。本研究旨在证明 HP 修复重金属污染的有效性，并深入了解其潜在机制，为废物利用奠定基础。
