新型复合絮凝剂在水处理中的应用

制备了无机-有机天然高分子复合絮凝剂PAC-CTS,探讨了其组成、投加量以及废水pH值对城市废水和金属合成水样絮凝效果的影响。结果表明,当处理的城市废水pH值为8,复合絮凝剂组成中CTS含量为200g/kg,投加量为80mg/L时,废水的色度、浊度和CODCr的去除率分别达到94%,99%和68%;在金属合成水样的应用中,当水样pH值为8,CTS含量为300g/kg时,复合絮凝剂絮凝效果最好,投加量分别为4和5mg/L时,Cu2+和Pb2+的去除效果分别为85%和73%。说明复合絮凝剂PAC-CTS兼有无机和有机絮凝剂的优点,是一种使用范围较广的新型絮凝剂。

Application of composite flocculant in waste water treatment

The inorganic-organic composite flocculants PAC-CTS were prepared and used for treatment of municipal sewage and waste water of heavy metal.It showed that the composite flocculants were better than primary inorganic and organic flocculants.For municipal sewage more than 94% chromaticity,99% turbidity and 68% COD were wiped off by 80 mg/L dosage of the flocculants with 20% weight fraction chitosan in the composite flocculant at about 8 pH value;And for waste water containing metal,the rate of removing metal Cu²⁺ and Pb²⁺ reached above 85% and 73% respectively at about 8 pH and 300 g/kg CTS when the dosages were 4 mg/L and 5 mg/L respectively.