臭氧/氯消毒中藻类有机物生成消毒副产物的特征  

Formation Characteristics of Disinfection By-products from Algal Organic Matter in Ozonation/Chlorine Disinfection

作　　者：闫雨薇 翟洪艳[1] 王雪娇[1] YAN Yu-wei;ZHAI Hong-yan;WANG Xue-jiao(School of Environmental Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学环境科学与工程学院,天津300350

出　　处：《中国给水排水》2020年第5期7-13,共7页China Water & Wastewater

基　　金：天津市环保局天津市引滦沿线水质特征分析与藻华预测技术研究项目(TJBD-2018-C-1826);国家自然科学基金资助项目(21207096)。

摘　　要：饮用水源地藻华会释放大量藻类有机物(AOM),AOM与氯消毒剂反应生成的消毒副产物(DBPs)会给饮用水用户带来不容忽视的健康风险。为此,探究了臭氧/氯消毒对AOM结构和DBPs生成的影响。结果表明,臭氧氧化能有效去除AOM中芳香蛋白和酚类、叶绿素a、藻蓝蛋白结构物质,但是对腐殖酸类结构的去除效果相对较差。DBPs生成总量随臭氧投加浓度的升高而增加,其中主要是三氯甲烷(TCM);卤代乙腈和卤代酮的生成总量随臭氧投加浓度的变化趋势不明显。延长臭氧接触时间会明显增加1 h氯化中TCM的生成量,氯化24 h时DBPs生成总量与臭氧接触时间无关。在臭氧/氯消毒过程中,AOM的DBPs生成潜能低于天然有机物(NOM)。AOM有利于一溴一氯乙腈的生成,而NOM会生成更多的二氯乙腈。Algae blooms in drinking water sources will release a large amount of algal organic matter(AOM),and disinfection by-products(DBPs)generated by the reaction of AOM and chlorine will bring significant health risks to drinking water users.Therefore,the effects of ozonation/chlorine disinfection on AOM structure and DBPs formation were explored.Ozonation could effectively remove aromatic proteins,phenols,chlorophyll a and phycocyanin in AOM,but the removal efficiency of humic acid-like structure was relatively lower than the other structures.The total DBPs production increased with the increase of ozone concentration,among which was mainly trichloromethane(TCM).The total production of haloacetonitriles and halocatones did not change significantly with the ozone concentration.Increasing the contact time of ozone would obviously enhance the TCM formation in the subsequent 1 h chlorination,but it had no effect on the formation of DBPs in the subsequent 24 h chlorination.During ozonation/chlorine disinfection,the DBPs formation potential of AOM was lower than that of natural organic matter(NOM).AOM facilitated the formation of bromochloroacetonitrile,while NOM favored the formation of dichloroacetonitrile.

关 键 词：藻类有机物 臭氧氧化 氯消毒 消毒副产物 天然有机物 

分 类 号：TU991[建筑科学—市政工程]