中文摘要：

摘要通过烧杯混凝试验分别考察了低温低浊水中聚合氯化铝（PAC）与水合MnO2的除浊去污效果，研究了PAC与水合MnO2联用的混凝效果以及对水中残余铝的影响，结果表明低温低浊水中PAC虽对溶解性有机物（DOM）有一定的去除效果，但最大浊度去除率仅为30．63％，并伴有水中残余铝大幅上升趋势。单独使用水合MnO：将会导致水中浊度升高，但对溶解性有机碳（DOC）与UVzu去除率可达17．78％和6．9％。PAC与水合MnO：联用能够有效降低沉后水浊度（最大去除率为61．9％），并降低水中DOC，其最大去除率达23．05％，且使水中胶体铝与溶解性铝的浓度得到降低。

英文摘要：

In this paper, the decontamination performance was investigated with polyaluminum chloride （PAC） and hydrous MnO2 respectively in low-temperature and low-turbidity water by the bench-scales tests. The combined influence of PAC and MnO2 on both coagulation effect and residual aluminum removal in water was also studied. The results show though PAC can remove a certain amount of dissolved organic matter （DOM） in low-temperature and low-turbidity water, the maximum removal rate of turbidity is only about 30.63 % and residual aluminum increases obviously in water. Additionally, using hydrous MnO2 alone can lead to the increase of water turbidity, but it improves the removal rates of DOC and UV~ to 17.78 % and 6.9 %, respectively. By combining PAC with hydrous MnO2, turbidity is reduced efficiently, the maximum removal rate of which is 61.9 %, and the content of DOC is also reduced, the maximum removal rate of which is 23.05 %. On the other hand, lower concentrations of colloidal aluminum and dissolved alu- minum are achieved