壳聚糖改性硅藻土对太湖含藻水体处理效果的研究  

Efficiency of chitosan-modified diatomite for remediation of algae-containing water in Taihu Lake

作　　者：马久远[1] 曹勋[1] 王国祥[1] 韩睿明[1] 王风贺[1] 欧媛[1] 许宽[1,2] 李振国[1,3] 徐磊[1] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210023 [2]徐州市环境保护科学研究所,江苏徐州221000 [3]湖南科技大学地理系,湖南湘潭411201

出　　处：《环境污染与防治》2014年第7期22-26,30,共6页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41173078);江苏省太湖水环境治理专项基金资助项目(No.TH2011207);江苏省科技厅科技支撑计划项目(No.BE2011690)

摘　　要：研究了壳聚糖改性硅藻土对太湖含藻水体中浊度和蓝藻的去除效果。结果表明:(1)在室内模拟实验中,综合叶绿素a的去除率和去除速率来看,较适宜的改性硅藻土投加量为50mg/L。在此投加量下,室内模拟实验中浊度去除率达到91.50%,叶绿素a去除率达到98.10%;(2)在原位实验中,投加改性硅藻土也能有效去除浊度和叶绿素a,表、中、下层3层水体的最终浊度去除率分别达到82.41%、79.09%、72.82%,叶绿素a去除率分别为92.43%、87.17%、65.62%。(3)无论在室内模拟实验还是原位实验中,投加改性硅藻土后水体的浊度去除和叶绿素a去除均呈现出显著的相关性(p<0.01),即两者的去除具有一定的同步性。Pot and in-situ experiments were carried out to verify the performance of chitosan-modified diatomite on turbidity and chlorophyll a removal from algae-containing waters of Taihu Lake. Considering the removal rate and speed of chlorophyll a, the appropriate chitosan-modified diatomite dosage in pot experiments was 50 mg/L. Under this condition,the removal rate of water turbidity and chlorophyll a was 91.50% and 98.10% respectively. In the in-situ experiments, chitosan-modified diatomite could also remove the turbidity and chlorophyll a effectively. For the surface, middle and bottom layers of Taihu Lake, the turbidity removal rate was 82. 41%, 79.09 %, 72.82 %, and chlorophyll a removal rate was 92.43% ,87.17% ,65.62% respectively. The removal rates of water turbidity was significantly posi- tive correlated with that of chlorophyll a （p〈0.01） both in pot and in-situ experiment,implicating a synchronized de- creasing trend of water turbidity and algae content.

关 键 词：硅藻土 壳聚糖 叶绿素A 浊度 太湖 

分 类 号：X524[环境科学与工程—环境工程]