研究表明 ,混凝去除分子量 >4 0 0 0u的溶解性有机物 (DOM)效果较好 ,而对分子量<4 0 0 0u的去除效果较差。粉末活性炭去除低分子量的DOM效果较好 ,去除大分子量的DOM效果较差。当粉末活性炭投加量较大时 ,DOM分子量的大小对吸附效果的影响减少。黄浦江水中分子量 <4 0 0 0u的一部分有机物难以被粉末活性炭吸附去除 The results show that the removal of dissolved organic matter (DOM) with molecular weight> 4000u is better by coagulation, while the removal of molecular weight is less than 4000u. Powder activated carbon removal of low molecular weight DOM effect is better, remove the large molecular weight of DOM less effective. When the amount of powdered activated carbon is large, the influence of the molecular weight of DOM on the adsorption effect is reduced. Part of the Huangpu River water with a molecular weight of <4000u is difficult to be adsorbed and removed by powdered activated carbon