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题名: Deposition behavior of residual aluminum in drinking water distribution system: Effect of aluminum speciation
作者: Zhang, Yue; Shi, Baoyou; Zhao, Yuanyuan; Yan, Mingquan; Lytle, Darren A.; Wang, Dongsheng
刊名: JOURNAL OF ENVIRONMENTAL SCIENCES
出版日期: 2016-04
卷号: 42, 期号:0, 页码:142-151
关键词: Aluminum deposition ; Drinking water distribution system ; Polyaluminum chloride (PACl) ; Quartz crystal microbalance
DOI: 10.1016/j.jes.2015.05.010
部门归属: 中国科学院饮用水科学与技术重点实验室
英文摘要: Finished drinking water usually contains some residual aluminum. The deposition of residual aluminum in distribution systems and potential release back to the drinking water could significantly influence the water quality at consumer taps. A preliminary analysis of aluminum content in cast iron pipe corrosion scales and loose deposits demonstrated that aluminum deposition on distribution pipe surfaces could be excessive for water treated by aluminum coagulants including polyaluminum chloride (PACl). In this work, the deposition features of different aluminum species in PACl were investigated by simulated coil-pipe test, batch reactor test and quartz crystal microbalance with dissipation monitoring. The deposition amount of non-polymeric aluminum species was the least, and its deposition layer was soft and hydrated, which indicated the possible formation of amorphous Al(OH)(3). Al-13 had the highest deposition tendency, and the deposition layer was rigid and much less hydrated, which indicated that the deposited aluminum might possess regular structure and self-aggregation of Al-13 could be the main deposition mechanism. While for Al-30, its deposition was relatively slower and deposited aluminum amount was relatively less compared with Al-13. However, the total deposited mass of Al-30 was much higher than that of Al-13, which was attributed to the deposition of particulate aluminum matters with much higher hydration state. Compared with stationary condition, stirring could significantly enhance the deposition process, while the effect of pH on deposition was relatively weak in the near neutral range of 6.7 to 8.7. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36167
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Recommended Citation:
Zhang, Yue,Shi, Baoyou,Zhao, Yuanyuan,et al. Deposition behavior of residual aluminum in drinking water distribution system: Effect of aluminum speciation[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2016,42(0):142-151.
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