中文摘要：

为了探索原位解决湖泛引起的水体感官和水质恶化问题，本研究在室内考察了改性当地土壤对湖泛黑物质的絮凝去除效果及土壤和沙子覆盖对絮体再悬浮的抑制作用，并在梅梁湾围隔实验中考察了改性当地土壤湖泊综合修复技术对模拟湖泛水体嗅味物质和营养盐的去除及水体溶解氧（DO）的改善效果．室内研究结果表明，壳聚糖改性土壤对湖泛水体黑物质的絮凝去除效果比聚合氯化铝更佳，在55mg／L的壳聚糖改性土壤投加量时，水体浊度从对照的〉2000NTU降低到5NTU，土壤和沙子覆盖能够有效地减少湖泛水体黑物质絮凝去除后的再悬浮．现场研究结果表明，该技术处理30min后总氮和总磷的去除率达到97．0％，嗅味物质DMTS和MIB的去除率达到75．0％以上，水体表层DO增加了75．0％，底层DO增加了183．5％．改性当地土壤湖泊综合修复技术对湖泛水体的感官和水质起到明显的应急改善效果．

英文摘要：

The modified local-soil-induced ecological restoration （MLS-IER） technology was tested to alleviate the organoleptic problem and water quality deterioration originated from the ＂black spots＂. The lab study showed that ehitosan modified local soil was more effective than PAC in the mitigation of black substances in the water of the black spots, the turbidity was reduced from 〉 2000 NTU in the control to 5 NTU at the dosage of 55 mg/L MLS, and the capping with soil or sand reduced the resuspension flock of black spots. The field pilot study showed that 30 vain after the treatment with MLS-IER, the level of nutrients （ TN, TP） decreased by 97% , odor compounds of MIB and DMTS decreased by 〉75% , DO of the surface and bottom water increased by 75% and 183.5% , respectively. MLS technology provides an in-situ strategy to alleviate the negative effect of black spots.