江西科学2026，Vol.44Issue(1)：1-9,9.DOI:10.13990/j.issn1001-3679.2026.01.001
钝化-疏浚协同抑制太湖底泥总磷释放研究
Study on the Synergistic Inhibition of Total Phosphorus Release from Sediment of Taihu Lake by Passivation-dredging
摘要
Abstract
Taihu lake,one of China's largest freshwater bodies,has been experiencing severe eutrophication and endogenous pollution in recent years,with sediment phosphorus release identified as a key driver of water quality degradation.Although traditional dredging can re-move nutrient-rich sediments,construction disturbance often leads to secondary pollution.To address this issue,this study innovatively integrates chemical passivation with dredging by employing polyaluminum chloride(PAC)as the passivating agent.Batch simulation ex-periments determined the optimal PAC dosage to be 4 g/kg.Results demonstrated that this passivation-dredging approach effectively inhibited the release of total phosphorus(TP)from sediments,achieving removal rates of 82.8%in Yueliang Bay and 62.6%in Meiliang Bay.Furthermore,PAC treatment improved the physicochemical properties of the overlying water by stabilizing pH,decreasing the oxidation-reduction potential(ORP),and reducing conductivity fluctuations,thereby mitigating the impacts of dredging disturbance.High-throughput 16S rRNA gene sequencing further revealed that PAC addition altered the micro-bial community structure in sediments by reducing the abundance of sulfur-cycling bacteria and promoting heterotrophic and nutrient-transforming taxa,which enhanced overall sys-tem stability.This study demonstrates that the synergistic passivation-dredging technique can effectively mitigate secondary pollution risks,providing both technical and microbiologi-cal support for large-scale ecological dredging in Taihu lake and other eutrophic water bodies.关键词
太湖/底泥疏浚/钝化技术/内源污染/富营养化Key words
Taihu lake/sediment dredging/passivation technology/endogenous pollution/eutrophication分类
建筑与水利引用本文复制引用
顾晓慧,倪守高,曹耀初,罗超锋,霍雷..钝化-疏浚协同抑制太湖底泥总磷释放研究[J].江西科学,2026,44(1):1-9,9.基金项目
国家重点研发项目(2022YFC3202702) （2022YFC3202702）
无锡市科技发展资金项目(WX0302B010505230012PB). （WX0302B010505230012PB）
