腐殖酸特性及其对三卤甲烷形成的影响

以提取腐殖酸和商品腐殖酸为对象,研究了不同腐殖酸对加氯消毒后三卤甲烷生成量的影响,并对腐殖酸特性进行了分析。结果表明,伊春腐殖酸比松花江腐殖酸和商品腐殖酸具有更高的三卤甲烷生成量、生成速度和更高的卤代活性。松花江腐殖酸和商品腐殖酸中的芳香结构、不饱和双键的分子较少,分子质量较大,而伊春腐殖酸中芳香结构和不饱和双键的分子较多,分子质量较低。小分子质量和含不饱和双键的有机物通常是消毒副产物的主要前体物,因而伊春腐殖酸加氯消毒后的三卤甲烷生成量比松花江腐殖酸和商品腐殖酸高。

Characteristics of Humic Acid and Its Influence on Trihalomethane Formation

The influence of extracted and commercial humic acid on trihalomethane formation was studied, and the characteristics of humid acid were analyzed. The result shows that the humic acid extracted in Yichun produces more trihalomethane with higher formation rate and higher halogenated activity, as compared with the humic acid extracted in Songhuajiang and commercial humid acid. The Songhuajiang and commercial humic acid have less aromatic structure and unsaturated double bond, with larger molecular weight, while the Yichun humic acid is to the contrary. The organics with small molecular weight and unsaturated double bond content are always the main precursors of disinfection by-product, which leads to the higher trihalomethane formation with the Yichun humic acid than the Songhuajiang and commercial humic acid after chlorine disinfection.