铁盐和铝盐混凝剂对消毒副产物的控制作用及机制研究
THE EFFICIENCY AND MECHANISM OF CONTROLLING CHLOROFORM FORMATION BY FERRIC AND ALUMINIUM
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摘要: 以三氯化铁和硫酸铝为研究对象,探讨了两种混凝剂对三氯甲烷生成量的控制作用及控制机制.结果表明,与硫酸铝相比,三氯化铁可以更好地控制三氯甲烷的生成量,对有机物的去除方面,也具有良好的效果.E4/E6变化表明,三氯化铁和硫酸铝对水中有机物的去除机制不同,硫酸铝主要去除水中大分子的有机物,三氯化铁更倾向于去除水中小分子有机物,而这些小分子有机物通常是消毒副产物的前体物,从而使三氯化铁对消毒副产物的控制作用较硫酸铝明显.Abstract: The controlling and mechanism of ferric chloride and aluminium sulphate in trihalomethane formation were investigated.The results showed that:compared with that of aluminium sulphate,ferric chloride has priority over aluminium sulphate in controlling trihalomethane formation and organic matter removal efficiency. E4/E6 implied that the mechanism of removal between ferric chloride and aluminium sulphate is different.Ferric chloride prefers to removing middle to little molecular weight organic matter,and that aluminium sulphate removing high molecular weight organic matter.So ferric chloride is more effective in controlling trihalomethane formation than aluminium sulphate.
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Key words:
- ferric chloride /
- aluminium sulphate /
- coagulation /
- disinfection by-products
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