Institute of Mine Reclamation Technology, Korea Mine Reclamation Corporation (MIRECO), Coal Center, 30 Chungjin-dong Street, Jongno-gu, Seoul 110-727, Republic of Korea.
Environ Technol. 2010 Apr 1;31(4):423-32. doi: 10.1080/09593330903513245.
The processes of coagulation and flocculation using high molecular weight long-chain polymers were applied to treat mine water having fine flocs of which about 93% of the total mass was less than 3.02 microm, representing the size distribution of fine particles. Six different combinations of acryl-type anionic flocculants and polyamine-type cationic coagulants were selected to conduct kinetic tests on turbidity removal in mine water. Optimization studies on the types and concentrations of the coagulant and flocculant showed that the highest rate of turbidity removal was obtained with 10 mg L(-1) FL-2949 (coagulant) and 12 mg L(-1) A333E (flocculant), which was about 14.4 and 866.7 times higher than that obtained with A333E alone and that obtained through natural precipitation by gravity, respectively. With this optimized condition, the turbidity of mine water was reduced to 0 NTU within 20 min. Zeta potential measurements were conducted to elucidate the removal mechanism of the fine particles, and they revealed that there was a strong linear relationship between the removal rate of each pair of coagulant and flocculant application and the zeta potential differences that were obtained by subtracting the zeta potential of flocculant-treated mine water from the zeta potential of coagulant-treated mine water. Accordingly, through an optimization process, coagulation-flocculation by use of polymers could be advantageous to mine water treatment, because the process rapidly removes fine particles in mine water and only requires a small-scale plant for set-up purposes owing to the short retention time in the process.
采用高分子量长链聚合物的混凝和絮凝过程被应用于处理含有细小絮体的矿山废水，其中约 93%的总质量小于 3.02 微米，代表了细小颗粒的粒度分布。选择了六种不同的丙烯酰胺型阴离子絮凝剂和聚胺型阳离子混凝剂组合，对矿山水中浊度去除进行动力学试验。对混凝剂和絮凝剂的类型和浓度进行了优化研究，结果表明，用 10mg/L FL-2949（混凝剂）和 12mg/L A333E（絮凝剂）进行混凝，浊度去除率最高，分别比单独使用 A333E 和自然重力沉淀提高了约 14.4 倍和 866.7 倍。在这种优化条件下，矿山水的浊度在 20 分钟内降低到 0NTU。通过进行zeta 电位测量来阐明去除细小颗粒的机制，结果表明，每对混凝剂和絮凝剂应用的去除率与通过从混凝剂处理后的矿山水中减去絮凝剂处理后的矿山水中的 zeta 电位而获得的 zeta 电位差之间存在很强的线性关系。因此，通过优化过程，聚合物的混凝-絮凝处理对矿山水处理有利，因为该过程可以快速去除矿山水中的细小颗粒，并且由于处理过程中的短停留时间，仅需要小规模的工厂即可进行设置。
