摘要
以探究氯化消毒水源回灌过程对地下水水化学特征的影响为目标,以威海市乳山河地下水库为研究区,开展氯化消毒水源回灌试验,分析人工回灌过程中不同阶段地下水环境要素、典型化学组分及金属浓度的变化特征。结果表明:混合作用影响下环境要素及典型化学组分均趋于水源特征,地下水主流方向最大混合比为52.6%;加入NaClO易于发生阳离子交换和方解石溶解作用,Ca2+浓度的增大伴随着HCO3-浓度的升高,地下水环境氧化性增强使Fe、Mn矿物溶出作用,出现DO浓度增大和pH值低于原生地下水的变化趋势。氯化消毒水源的注入改变地下水中微生物群落,SO42-浓度降低是由于其作为电子受体参与降解作用。结果为评价人工回灌过程中水源水质条件对地下水环境安全影响提供科学参考。
To investigate the secondary formation of chloroform under the influence of colloidal effect during managed aquifer recharge,the formation of chloroform under different hydro-chemical conditions with and without colloids is investigated by batch experiments.Besides,the synergistic mode between chloroform and silica colloids is analyzed by tangential flow ultrafiltration technique combined with atomic force electron microscopy(AFM).The results indicate that the formation of chloroform increases with the increase in contact time.High chloride/TOC ratios,high pH,and low ionic strength can promote the formation of chloroform in a specific contact time.The presence of silica colloid would affect the adsorption of the reaction precursor,which inhibits the formation of chloroform at all times and has a strong adsorption effect on the chloroform in water.The results can provide a scientific understanding of the secondary formation of chloroform during artificial recharging.
作者
陈学群
刘丹
张文静
管清花
田婵娟
辛光明
CHEN Xue-qun;LIU Dan;ZHANG Wen-jing;GUAN Qing-hua;TIAN Chan-juan;XIN Guang-ming(Water Resources Research Institute of Shandong Province,Jinan 250013,China;Shandong Provincial Key Laboratory of Water Resources and Environment,Jinan 250013,China;Jilin University,Changchun 130021,China)
出处
《中国农村水利水电》
北大核心
2022年第5期1-6,12,共7页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目(41877175)
水利部技术示范项目(SF-201803)
山东省水利科学研究院自选课题资助项目(SDSKY⁃ZX202121-1)。
关键词
人工回灌
回灌水源
氯化消毒
水化学特征
野外试验
managed aquifer recharge
source of recharge water
chlorination
hydro-chemical characteristics
field test
