水资源保护2016，Vol.32Issue(5)：97-102,6.DOI:10.3880/j.issn.1004-6933.2016.05.019
壳聚糖改性黏土作用下湖泛致黑悬浮物的沉降特性研究
Study on deposition of algal bloom-induced black suspended matter using chitosan-modified clay
摘要
Abstract
In order to study the regularities of flocculation, settlement, and resuspension of algal bloom-induced black suspended matter in Taihu Lake when using chitosan-modified clay, an indoor experiment was conducted to simulate the flocculation and resuspension processes under the effects of wind and wave disturbances. A cylindrical tank was used in the experiment, and chitosan-modified clay with doses of 0. 2 g/L of chitosan and 1 g/L of diatomite was selected as the flocculant. The experimental results show that, when shear stress exceeded 0. 042 N/m2 , resuspension occurred in the low-turbidity group;when shear stress exceeded 0. 109 N/m2 , resuspension occurred in the high-turbidity group. Comparison of shear stresses induced by different wind velocities shows that a wind speed of below 4 m/s would not cause floc resuspension. This study aims to provide references for disposal of algal blooms in emergencies in Taihu Lake.关键词
太湖湖泛/壳聚糖改性黏土/模拟流速实验/絮凝沉降/再悬浮/风浪扰动Key words
algal bloom in Taihu Lake/chitosan-modified clay/simulation of flow velocity/flocculation and settlement/resuspension/wind and wave disturbances分类
资源环境引用本文复制引用
徐磊,逄勇,黄亚文,张鹏..壳聚糖改性黏土作用下湖泛致黑悬浮物的沉降特性研究[J].水资源保护,2016,32(5):97-102,6.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07506-006,2012ZX07101-010) （2012ZX07506-006,2012ZX07101-010）
