饮水砷中毒病区水砷形态变化特征

发布时间：2018-03-26 01:46

  本文选题：饮用水　切入点：砷形态　出处：《环境化学》2017年10期

【摘要】：水源水经水管传输后,其砷形态的含量及其百分比变化特征研究较少.因此,本文选择内蒙古某饮水型砷中毒病区为研究区,分析饮用的水源水日际和日内总无机砷含量(iAs)、以及水源水传输到用户端的末梢水和储存水的无机砷形态含量(iAs~Ⅲ、iAs~Ⅴ).结果发现,水源水iAs~Ⅲ、iAs~Ⅴ和iAs的平均含量分别为32.19、64.58、96.77μg·L~(-1),末梢水iAs~Ⅲ、iAs~Ⅴ和iAs的平均含量分别为100.11、63.09、163.21μg·L~(-1),而储存水iAs~Ⅲ、iAs~Ⅴ和iAs的平均含量分别为14.72、126.41、141.12μg·L_(-1).水源水的iAs~Ⅴ和iAs含量日内具有明显的变化,iAs含量在日际间无明显的差异,而iAs~Ⅲ和iAs~Ⅴ含量在日际间存在较为明显的变化.此外,水源水、末梢水和储存水的iAs~Ⅲ占总无机砷的比例分别为33.26%、61.33%和10.43%,而iAs~Ⅴ占总无机砷的比例分别为66.74%、38.67%和89.57%.该结果表明,饮水砷形态的转化可能受到水与空气接触时间、气温、气压和水温等因素的影响,且水源水在水管传输过程中可能导致末梢水和储存水的iAs含量增加.因此,饮水砷的暴露评估应关注不同形态的砷暴露以及饮水类型的砷暴露.
[Abstract]:After the source water is transported through the water pipe, there are few studies on the content of arsenic and its percentage change. Therefore, a drinking water type arsenism area in Inner Mongolia is selected as the study area in this paper. The contents of total inorganic arsenic in drinking water during the day and in the day, as well as the terminal water transported to the user side and the inorganic arsenic species in the storage water are analyzed. The results show that, The average contents of iAs- 鈪，

本文编号：1665791