曝气+底泥改良剂修复黑臭水体污染底泥  

Remediation of polluted sediment from black and odorous water by aeration combined with sediment modifier

作　　者：曹琳 刘煌 许国静 王图锦[2] CAO Lin;LIU Huang;XU Guojing;WANG Tujin(China Merchants Ecological Environment Protection Technology Co.,Ltd.,Chongqing 400067;School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074)

机构地区：[1]招商局生态环保科技有限公司,重庆400067 [2]重庆交通大学河海学院,重庆400074

出　　处：《环境污染与防治》2022年第6期734-739,共6页Environmental Pollution & Control

基　　金：重庆市技术创新与应用发展专项面上项目(No.2019jscx-msxmX0169);重庆市技术创新与应用示范项目(No.2018jscx-msybX0307)。

摘　　要：采用曝气+底泥改良剂修复技术对黑臭水体的污染底泥进行修复,分析修复前后底泥理化性状特征及其对沉水植物生长的影响。结果表明:曝气+底泥改良剂修复效果好于单一的曝气或底泥改良剂,修复后底泥的黑臭现象得到有效去除,和初始相比,底泥的硫化物、Fe^(2+)、氨氮、有机质降幅分别为89%、72%、70%、25%;底泥中磷的形态稳定性得到提升,尤其是钙结合态磷(HCl-P)增幅达到73%;修复后底泥为苦草(Vallisneria natans)和伊乐藻(Elodea nuttallii)的生长创造了良好的环境条件,成活率达到100%;曝气+底泥改良剂组中植株鲜质量低于曝气组,根冠比高于曝气组,表明底泥改良剂通过降低磷的生物可利用性,对植株生长造成一定胁迫,而这有益于抑制沉水植物的过度生长。The polluted sediment from black and odorous water was remediated by aeration+sediment modifier.The physical and chemical properties of sediment before and after remediation and influence on the growth of submerged macrophytes were analyzed.The results showed that the remediation effect of aeration+sediment modifier was better than that of single aeration or sediment modifier.After remediation,the black and odorous characteristics had been effectively removed,and the contents of sulfide,Fe^(2+),ammonia nitrogen and organic matter in sediment decreased by 89%,72%,70% and 25%,respectively.The stability of phosphorus fractionation in sediment was improved,especially the content of HCl-P increased significantly,with an increase of 73%.The remediated sediment was suitable for the growth of Vallisneria natans and Elodea nuttallii,with a survival rate of 100%.The plant’s fresh weight in aeration+sediment modifier group was lower than that in aeration group,while the plant’s root-shoot ratio was higher than that in the aeration group.The results suggested that sediment modifier caused a certain stress on the growth of plant by reducing the bioavailability of phosphorus,which was beneficial to inhibit the excessive growth of submerged macrophytes.

关 键 词：底泥 修复 曝气 底泥改良剂 沉水植物 

分 类 号：X52[环境科学与工程—环境工程]