湖泊科学2012，Vol.24Issue(6)：801-810,10.
改性当地土壤技术修复富营养化水体综合效果研究:Ⅰ.水质改善的应急与长期效果与机制
Eutrophication control using modified local soil/sand induced ecological restoration technology: Ⅰ.Effect and mechanism on short and long term improvement of water quality
摘要
Abstract
The effect of algal bloom control and water quality improvement using modified local soil/sand induced ecological restoration technology ( MTS-IER) was studied in an enclosure in Meiliang Bay in the northern Lake Taihu from October 2010 to September 2011. Lab experiments were used to study the mechanism of long-term water quality improvement including resuspension and internal loads control at water-sediment interfaces. Field monitoring results indicated that, TN, NO3- -N, NH4+ -N, TP and PO43- -P were reduced by 66% , 57% , 60% , 93% , 92% and 98% , respectively, 30 min after treatment using MLS; and the average concentrations were reduced by 39. 83% ,48.53% ,52.30% , 18.75% and 60. 00% , respectively, within the following 11 months compared to the control area. The resuspension experiment showed that the anti-resuspension ability of modified soil and sand increased by a factor of 3 and 5 compared to unmodified soil. The sediment-water incubation experiment showed that algae flocculation followed by capping with MLS remarkably increased the ORP and DO at the sediment-water interface, which reversed the source of sediment-water flux of TP and TN into a sink and remarkably reduced the flux of PO43- -P and NH4+ -N from sediment to water column. The results suggested that, after nutrients were quickly removed from the waler by flocculating the algal blooms, it is possible to physically reduce the resuspension of the algae floes and chemically block the release of nutrients from the sediment by MLS capping. The sustainable water quality improvement and reduction of algal bloom recruitment can be achieved when the buried algae banks arc decomposed and absorbed by the restoration of submerged vegetal ions in shallow waters, which is triggered by the MLS-IER technology.关键词
改性当地土壤/水生态修复/富营养化控制/内源污染控制/水华控制/太湖/梅梁湾Key words
Modified local soil/sand/ aquatic ecological restoration/ eutrophication control/ internal load control/ algal bloom control/ Lake Taihu/ Meiliang Bay引用本文复制引用
潘纲,李巧霞,黎丽雯,古小治,钟继承,余育和,颜庆云,代立春,李梁,尚媛媛,李宏,毕磊,何林宸,王丽静,王丹..改性当地土壤技术修复富营养化水体综合效果研究:Ⅰ.水质改善的应急与长期效果与机制[J].湖泊科学,2012,24(6):801-810,10.基金项目
国家重点基础研究发展计划"973"项目(2008CB418105,2010CB933600)资助. （2008CB418105,2010CB933600）
