Removal of harmful cyanobacterial blooms in Taihu Lake using local soils. III. Factors affecting the removal efficiency and an in situ field experiment using chitosan-modified local soils

被引：128

作者：

Pan, G ^{[1
]}

Zou, H ^{[1
]}

Chen, H ^{[1
]}

Yuan, XZ ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Environm Aquat Chem, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2006年 / 141卷 / 02期

基金：

中国国家自然科学基金;

关键词：

harmful cyanobacterial blooms; clays; chitosan-modified clays; flocculation; ionic strength; organic content; pH; cell concentration; growth stage;

D O I：

10.1016/j.envpol.2005.08.047

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Effects of ionic strength, pH, organic content, cell concentration, and growth phase on the removal of MA. cells using chitosan-modified sepiolite were Studied in the laboratory. The MA removal efficiency increased with the increase of salinity for normal clay flocculation. In contrast, for chitosan-modified clays/soils, MA removal efficiency increased with the decrease of salinity. The removal efficiency of chitosan-modified sepiolite was not significantly affected by pH (6-9), but dropped dramatically beyond pH 10. Humic acid had a small negative effect on the removal of MA cells. Cells were removed more effectively by clays around the early senescence growth phase than other growth stages. The removal efficiency increased as the cell concentration increased. In a field enclosure of Taihu Lake, a loading of 0.025 g/L chitosan-modified local soils removed 99% algal cells and no increase of chlorophyll-a was observed during the following one month's monitoring process. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：206 / 212

页数：7

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