臭氧—生物活性炭净水工艺出水卤乙酸分布  

Distribution of haloacetic acids at ozone-biological activated carbon water treatment plant

作　　者：王晓云 李启明 付爱民 Wang Xiaoyun;Li Qiming;Fu Aimin(College of Ecological Environment and Urban Construction,Fujian University of Technology,Fuzhou 350008 , China;7th District Office,Taiwan Water Corporation,Kaohsiung000833 , China;Fujian Ningde Nuclear Power Co.,Ltd.,Ningde 355200 China)

机构地区：[1]福建工程学院生态环境与城市建设学院,福州350008 [2]台湾自来水公司第七区管理处,高雄000833 [3]福建宁德核电有限公司,宁德355200

出　　处：《给水排水》2019年第7期11-16,31,共7页Water & Wastewater Engineering

摘　　要：2017年7月~2018年6月,以周为单位对臭氧-生物活性炭(O3-BAC)净水工艺水厂出水进行水样采集,共取样52次,研究了出水卤乙酸(haloacetic acids,HAAs)分布情况。研究表明,出水一氯乙酸(monochloroacetic acid,MCAA)、二氯乙酸(dichloroacetic acid,DCAA)、三氯乙酸(trichloroacetic acid,TCAA)、一溴乙酸(monobromoacetic acid,MBAA)、二溴乙酸(dibromoacetic acid,DBAA)等5种卤乙酸(five haloacetic acids,HAA5)浓度介于1.18~7.18μg/L,低于USPEA所规定的最大允许浓度值30μg/L;出水一氯乙酸、二氯乙酸、三氯乙酸、一溴乙酸、二溴乙酸、三溴乙酸(tribromoacetic acid,TBAA)、一溴一氯乙酸(bromochloroacetic acid,BCAA)、一溴二氯乙酸(bromodichloroacetic acid,BDCAA)、二溴一氯乙酸(chlorodibromoacetic acid,CBDAA)等9种卤乙酸(nine haloacetic acids,HAA9)浓度介于3.20~11.69μg/L。水厂出水HAAs主要为DBAA、BCAA、DCAA及TCAA。夏季以DBAA与BCAA为主要成分,以含溴乙酸为主;冬季以DCAA与TCAA为主要成分,以含氯乙酸为主。HAAs浓度随着时间与季节的改变,由夏季至冬季浓度下降,然后自冬季至夏季浓度升高,说明水厂出水HAAs浓度与温度变化趋势一致。相关性分析结果表明,原水温度、出水温度与HAA5、HAA9浓度呈现正相关,出水pH与HAA5、HAA9浓度呈现负相关,表明水温与pH均会影响HAAs化合物的生成量。Water samples were collected once a week from ozone-biological activated carbon process purification plant effluent during the period from July 2017 to June 2018.A total of 52 samples were taken to study the change of haloacetic acid.Research shows monochloroacetic acid(MCAA),dichloroacetic acid(DCAA),trichloroacetic acid(TCAA),monobromoacetic acid(MBAA)and dibromoacetic acid(DBAA),the five kinds of haloacetic acids’ s concentrations varies from 1.18μg/L to 7.18μg/L,less than 30μg/L the prescribed maximum acceptable concentration of USPEA.And the concentrations of monochloroacetic acid(MCAA),dichloroacetic acid(DCAA),trichloroacetic acid(TCAA),monobromoacetic acid(MBAA),dibromoacetic acid(DBAA),tribromoacetic acid(TBAA),bromochloroacetic acid(BCAA),bromodichloroacetic acid(BDCAA)and chlorodibromoacetic acid(CBDAA),the nine kinds of haloacetic acids change between 3.20μg/L and 11.69μg/L.Water treatment plant effluent HAAs are mainly DBAA、BCAA、DCAA and TCAA.In summer DBAA and BCAA are the major constituents which mainly contained bromoacetic acid.However,in winter the main constituent becomes DCAA and TCAA,chloroacetic acid is more common.The concentration of haloacetic acid changes with time and season,it descendes from summer to winter and then increases from winter to summer,which illustrates the quantity of haloacetic acid in water samples changes in accord with air temperature.The results of correlation analysis show that there are positive correlations among the raw water temperature﹑the outlet temperature and the amount of HAA5 and HAA9.Nevertheless,there are negative correlations between pH of outlet water and them.Which means both water temperature and pH affected the turnout of halogenacetic acid compounds.

关 键 词：臭氧-生物活性炭 水厂出水 卤乙酸(HAAs) 主要成分 组分比例 温度 酸碱度 

分 类 号：TU991.2[建筑科学—市政工程]