摘要
为了通过对磷和藻类的控制实现对富营养化水体的快速修复,该文采用CMK+LMB联用方法对富营养化水体开展修复实验研究。研究结果表明,相比单一絮凝剂或镧改性膨润土的使用存在的局限性,CMK+LMB联用能够快速沉淀水体中的藻细胞及除磷。实验开始后第1天,藻细胞密度从实验前的14.37×10^(6)cell/L迅速降至3.20×10^(6)cell/L,降幅达到78%。实验开始后水体透明度从0.42 m迅速提高至1.2 m,水体水质大幅度改善,第6天水体从重度富营养化状态改善至中营养水平;表层沉积物中磷的形态的稳定性得到提升,活性磷组分平均占比从26.07%下降至17.93%。研究结果表明,使用CMK+LMB联用技术能够在短期内达到修复水体富营养化的目的,并通过固磷作用持久性的稳定水质,防止水质的再次恶化。
In order to control phosphorus and algae in eutrophic water for promising greater and quicker ecological recovery,the CMK+LMB technology was used to carry out the remediation experiment of eutrophic water.The results showed that compared with the limitations of single flocculant or lanthanum modified bentonite,CMK+LMB technology could quickly precipitate algae cells and remove phosphorus in water.On the first day after the experiment,the density of algae cells decreased rapidly from 14.37×10^(6)cell/L to 3.20×10^(6)cells/L,with a decrease rate of 78%.After the experiment,the transparency of water increased rapidly from 0.42 m to 1.2 m,and the water quality was improved greatly.On the 6 th day,the water quality was improved from severe eutrophication to mesotrophic level.The stability of phosphorus fractionation in surface sediments was improved,and the average proportion of active phosphorus components decreased from 26.07%to17.93%.This field trial study indicated that restoration of eutrophication water could be significantly accelerated by using CMK+LMB technology,and stabilize water quality continuously through phosphorus fixation thus preventing water quality from deteriorating again.
作者
曹琳
刘煌
许国静
王图锦
CAO Lin;LIU Huang;XU Guojing;WANG Tujin(China Merchants Ecological Environment Protection Technology Co.Ltd.,Chongqing 400067,China;School of River arid Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第6期91-97,共7页
Environmental Science & Technology
基金
重庆市技术创新与应用发展专项面上项目(cstc2019jscx-msxmX0169)
重庆市技术创新与应用示范项目(社会民生类一般项目,cstc2018jscx-msybX0307)。
关键词
壳聚糖改性高岭土
镧改性膨润土
富营养化水体
固磷
除藻
chitosan-modified kaolinite
lanthanum modified bentonite
eutrophic water
phosphorus fixation
algae removal
作者简介
曹琳(1984-),女,高级工程师,博士,主要研究方向为新型复合功能环境材料的开发及应用,(电子信箱)82803926@qq.com;通讯作者:王图锦,(电子信箱)wangtujin@163.com。
