ICAR-Indian Institute of Soil Science, Nabibagh, Bhopal, Madhya Pradesh, 462 038, India.
Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh, 482004, India.
Bull Environ Contam Toxicol. 2021 Mar;106(3):536-544. doi: 10.1007/s00128-020-03096-1. Epub 2021 Jan 27.
An experiment was conducted to study the effects of co-composted products of municipal solid waste (MSW) and pigeon pea biochar (PPB) on heavy metal mobility in soil and its uptake by spinach. Application of municipal solid waste biochar co-compost (MSWBC) significantly (p ≤ 0.05) reduced the heavy metal content in spinach leaves and roots compared to municipal solid waste compost (MSWC) amended soil. The percent decrease in spinach leaf following the application of MSWBC-10% PPB compared to MSWC was 20.62%, 28.95%, 36.02%, 41.88%, 41.50%, and 41.23% for Cu, Cd, Pb, Cr, Ni, and Zn, respectively. The dry matter yield of spinach and soil organic carbon (SOC) content in soil amended with MSWBC-10% PPB was significantly increased by 32.75% and 47.73%; and 17.62% and 27.45% relative to control and MSWC amended soil. The study concludes that co-composted product, MSWBC, stabilized heavy metals in MSW, reduced their uptake by spinach and thus making it a viable option for safe disposal of MSW.
进行了一项实验，以研究城市固体废物（MSW）和木豆生物炭（PPB）共堆肥产品对土壤中重金属迁移性及其被菠菜吸收的影响。与施用城市固体废物堆肥（MSWC）的土壤相比，施用城市固体废物生物炭共堆肥（MSWBC）显著（p≤0.05）降低了菠菜叶片和根部的重金属含量。与 MSWC 相比，施用 MSWBC-10% PPB 后，菠菜叶片中 Cu、Cd、Pb、Cr、Ni 和 Zn 的减少百分比分别为 20.62%、28.95%、36.02%、41.88%、41.50%和 41.23%。施用 MSWBC-10% PPB 可使菠菜干物质产量和土壤有机碳（SOC）含量分别显著增加 32.75%和 47.73%；相对于对照和 MSWC 处理的土壤，分别增加 17.62%和 27.45%。研究结论认为，共堆肥产品 MSWBC 稳定了 MSW 中的重金属，减少了其被菠菜吸收的量，因此是安全处理 MSW 的可行选择。
