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给水管网中管材对水质变化的影响研究

Water & Wastewater Engineering(2006)

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Abstract
研究了给水管网中镀锌钢管、铝塑管等常用管材中水质变化的规律,得出了三种管材中游离氯和化合氯的衰减规律,分析了金属离子溶出的影响因素。发现三种管材中旧镀锌钢管的余氯衰减最快,新镀锌钢管比铝塑复合管余氯衰减要快,旧镀锌钢管中余氯衰减呈现一级动力学特征,新镀锌钢管和塑料管余氯衰减呈现零级动力学特征。随着管网水停留时间的增加,锌、铁等金属离子浓度增加,溶出铁的含量与浊度、色度呈现很好的线性相关关系。
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Key words
Chlorine decay,Pipe materials,Water supply system,Metal ion release
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