On-line optical determination of floc size of Fe(III) coagulants.
On-line optical determination of floc size of Fe(III) coagulants.
复制标题
DOI：
--
复制
发表时间：
2005
影响因子：
6.9
通讯作者：
Yan Wang;B. Gao;Qin-yan Y u e;Weizhi Zhou;Yong-bao Chu
中科院分区：
文献类型：
--
作者：
Yan Wang;B. Gao;Qin-yan Y u e;Weizhi Zhou;Yong-bao Chu
本研究研究了使用氯化铁（FeCl3）和聚合氯化铁（PFC）处理模拟水样时的絮体聚集情况、平均絮体尺寸、絮体尺寸方差和絮体生长速度。研究了混凝剂用量、离子强度、溶液pH等因素对絮凝体聚集的影响。实验是在小型反应器中使用光度色散分析仪（PDA）进行的。结果表明，PFC与FeCl3的絮体聚集效果存在较大差异。 PFC的平均絮体尺寸和絮体生长速度远大于FeCl3。与FeCl3相比，PFC在更宽的pH值、用量和离子强度范围内具有更好的混凝性能。研究还发现，PFC 的混凝效率并不取决于絮体的平均尺寸，而是取决于絮体的生长速度。
This study investigated the floc aggregation, average floc size, floc size variance and floc growth velocity when ferric chloride (FeCl3) and polyferric chloride (PFC) were used to treat the simulated water samples. The factors including coagulant dose, ionic strength and solution pH, which affect the floc aggregation, were studied. Experiments were carried out in a bench-scale reactor using photometric dispersion analyzer (PDA). Results showed that there were great differences between the floc aggregation of PFC and FeCl3. The average floc size and floc growth velocity of PFC were much larger than those of FeCl3. Compared with FeCl3, PFC gave a better coagulation performance in wider range of pH, dosage and ionic strength. It was also found that the coagulation efficiency of PFC did not depend on average floc size but on floc growth velocity.