堆肥(或堆肥化)与生物炭联合修复洞庭湖湿地（水稻地）污染土壤的方法及机理研究

堆肥、生物炭是两种重要的廉价修复材料。堆肥（或堆肥化）与生物炭的相互作用为进一步提高二者的修复效率提供了可能。目前，尚未见到有关堆肥化处理过的生物炭、生物炭和生物质材料混合后的堆肥材料对土壤重金属及难降解有机物原位修复效果的报道。本项目将围绕“堆肥(或堆肥化)及生物炭联合修复洞庭湖湿地污染土壤的机理与方法”，研究堆肥（或堆肥化）与生物炭联合修复土壤重金属、难降解有机物污染的效果及机理，揭示复合污染条件下重金属与难降解有机物在修复过程中的交互作用及修复机理，开发能有效修复土壤重金属及难降解有机物复合污染的廉价修复技术和方法。本项目的研究成果对生物质材料（如农业秸秆、畜禽粪便、树木枝叶、生活垃圾、活性污泥等）的资源化利用和土壤重金属与难降解有机物复合污染的原位修复有重要意义，同时可以为洞庭湖湿地（水稻地）生态保护提供科学支撑。

Compost and biochar are two inexpensive and important remediation materials.Interaction of compost (or composting) and biochar could provide a method for improving the effectiveness of compost and biochar remediation. However, little information is about the efficiency of composted biochar or composting product of mixture of biochar and biomass on heavy metal or recalcitrant organic contaminated soil in situ remediation. This item is about the mechanism and method of compost (or composting) and biochar combined remediation of contaminated soil in Dongting Lake wetland. This research will study the effects and mechanism of combined remediation of heavy metal or recalcitrant organic contaminated soil, figure out the interaction of heavy metal remediation and recalcitrant organic remediation under combined pollution. It will develop technology of remediation of heavy metal and recalcitrant organic combined polluted soil. The results of this research have important implications for utilization of biomass (such as, agricultural straw,livestock excrement, branches and leaves, household waste, sludge et al.) and soil heavy metal and recalcitrant organic combined pollution in situ remediation, and also provide scientific supports for ecological protection of Dongting Lake wetland（riceland).