化物对腐蚀尺度成分和饮用水分配系统中重金属释放的影响
Hui Zhang1, Shan Zhang1, Yuekai Liu2
1School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
Journal of hazardous materials
|January 10, 2024
概括
饮用水配送系统 (DWDS) 的化物含量升高会增加管道尺度中的重金属释放. 这项研究表明,化物破坏腐蚀的稳定性,导致水中的铁,和其他金属污染.
科学领域:
- 环境科学 环境科学
- 水的化学 水的化学
- 材料科学 材料科学 材料科学
背景情况:
- 水的化学变化可能会导致饮用水分配系统 (DWDS) 中的重金属释放.
- 管道中的腐蚀可以作为重金属的来源.
- 了解影响金属释放的因素对于水安全至关重要.
研究的目的:
- 研究化物对DWDS中重金属释放 (Fe,Mn,As,Cr,Mo,V,Sr,Co) 的影响.
- 在不同的化物条件下分析管道尺度组成的变化.
- 为了确定金属释放和管道尺度特征之间的相关性.
主要方法:
- 使用钢铁和铁管道环的实验研究.
- 控制添加化物来模拟不同的水化学.
- 管道尺度组成的分析 (哥石,勒皮多克罗石, siderite,磁石).
- 监测废水中的重金属度.
主要成果:
- 化物添加增加了管道中的戈伊 (α-FeOOH) 和勒皮多克罗 (γ-FeOOH) 含量,同时降低了磁 (Fe3O4).
- 增加的化物水平显著提高了废水中的Fe,Mn,As,Cr,Mo,V,Sr和Co的度.
- 在Fe&Mn和其他重金属之间发现了强烈的正相关性,这表明共释放.
结论:
- 化物破坏稳定并溶解腐蚀,导致重金属在DWDS中释放.
- 吸附场的竞争也会导致这些金属的释放.
- 调查结果为预防重金属污染和加强供水安全的战略提供了见解.
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