不同分子量腐殖酸的氯化反应  

Chlorination of humic acid with different molecular weights

作　　者：薛文娟 刘立超 李征[4] 李静 XUE Wenjuan;LIU Lichao;LI Zheng;LI Jing(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;Tangshan Shougang Jingtang Xishan Coking Co.Ltd.,Tangshan,Hebei 063200,China;Qinhuangdao Glass Industry Research and Design Institute Company Limited,Qinhuangdao,Hebei 066000,China;China First Design&Research Institute,North China Municipal Engineering Design&Research Institute,Tianjin 300074,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]唐山首钢京唐西山焦化有限公司,河北唐山063200 [3]秦皇岛玻璃工业研究设计院有限公司,河北秦皇岛066000 [4]中国市政工程华北设计研究总院第一设计研究院,天津300074

出　　处：《河北工业大学学报》2023年第1期81-85,96,共6页Journal of Hebei University of Technology

基　　金：河北省高等学校科学技术研究项目(QN2014081)。

摘　　要：以天然水体底泥提取的腐殖酸(HA)为研究对象,进行超滤膜分级,对不同分子量区间的HA进行氯化,考察其三卤甲烷生成能力(THMsFP)以及氯化过程中UV_(254)、A_(265)/A_(465)、A_(465)/A_(665)和红外谱图的变化情况。结果表明:不同分子量级别的HA样品具有相似的结构,但其含氧官能团数量随分子量降低呈现增加趋势。氯化反应破坏了多重聚合苯环结构,生成了饱和脂肪烃类结构、烯烃类不饱和C=C结构、C=O、C-O官能团和C-Cl、C-Br结构。由于不同分子量范围HA的C=C不饱和结构和C-O官能团数量不同,导致各个分子量HA的THMsFP产率和其溴代贡献因子不同。其中10~30 kDa的HA具有最大的THMsFP产率和最小的溴代贡献因子。The humic acid(HA)extracted from the sediment was separated by ultrafiltration,and chlorinated subsequently.The trihalomethanes formation potential(THMsFP)UV-Vis and infrared spectrum of HA fractions with different molecule weight(MW)were analyzed.The results showed that the HA samples with different MW levels had similar structures,while the number of oxygen-containing functional groups increases while decreasing the MW.The aromatic structures were destroyed and the aliphatic hydrocarbon structures,olefin unsaturated structures,C=O,C-O and C-Cl,C-Br structures were formed during chlorination.The amount of THMsFP yields and bromine incorporation in THMs,n(Br)THMs,were affected by unsaturated structures and C-O functional groups in HA fractions with different MW.The HA with MW between 10~30 kDa had the highest THMsFP yields and lowest n(Br)THMs.

关 键 词：腐殖酸(HA) 分子量(MW) 三卤甲烷生成能力(THMsFP) 

分 类 号：X703.5[环境科学与工程—环境工程]