摘要
针对目前广泛使用的无机高分子絮凝剂的分子量、吸附架桥能力与有机絮凝剂相比仍不足的问题,将两种及以上的絮凝剂产品联合使用,以获得良好的水处理效果。选择了不带电荷或带正电荷的有机絮凝剂与无机絮凝剂复合,结果表明:复合药剂中的有机成分对药剂的电荷特性有着重要的影响,含量越高,Zeta电位越高。复合药剂的Zeta电位随着碱化度B的增大呈现先升高后降低的趋势,当B为2.0时,形成了较多的多核羟基络合物,所带电荷较高,进一步增大B值会导致所带正电荷数下降。有机成分含量过高时,会吸附在微小絮体表面,使絮体进入复稳状态。分开投加混凝剂与助凝剂对DOC的去除效果最差,复合产品中的无机组分和有机组分之间存在协同增效作用,提高了对有机物的去除效果。
The molecular weight,adsorption ability and bridging effects of inorganic coagulant were insufficient compared to organic flocculants,and using the composite coagulants could guarantee the coagulation performances. Two kinds of organic flocculants（ without charges and with positively charged polymer） were selected. The results indicated that the concentrations of organic polymer had significant effects on the charges of the composite coagulant,and the zeta potential increased with increasing the concentration of organic polymer. The zeta potential of compound coagulants increased with increasing the B value until 2. 0. When the B value was larger than 2. 0,the charge neutralization ability was decreased. A high concentration of organic polymer would cause the polymers adsorbed on the surfaces of the micro-flocculation. Dosing coagulant and flocculant separately led to lowest removal efficiency of DOC,while the synergistic effects between the inorganic and organic components of composite flocculants could improve removal efficiency of organic matters.
作者
齐敦哲
曾继军
武仁超
徐慧
Qi Dunzhe Zeng Jijun Wu Renchao Xu Hui(Ningdong Water Co. Ltd, Yinchuan 751400, China State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beo＇ing 100085, China)
出处
《供水技术》
2017年第5期1-5,共5页
Water Technology
关键词
无机絮凝剂
强度因子
恢复因子
inorganic coagulant
strength factor
recovery factor
