Effects of pre-ozonation on organic matter removal by coagulation with IPF-PACl
文献类型：期刊论文
| 作者 | Liu, HL; Wang, DS; Shi, BY; Wang, M; Tang, HX |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
 |
| 出版日期 | 2006 |
| 卷号 | 18期号:3页码:453-458 |
| 关键词 | natural organic matter (NOM) fractionation pre-ozonation PACl coagulation |
| 英文摘要 | Ozone plays an important role as a disinfectant and oxidant in potable water treatment practice and is increasingly being used as a pre-oxidant before coagulation. The purpose of this study is to obtain insight into the mechanisms that are operative in pre-ozonized coagulation. Effects of pre-ozonation on organic matter removal during coagulation with IPF-PACl were investigated by using PDA (photometric disperse analysis), apparent molecular weight distribution and chemical fractionation. The dynamic formation of floes during coagulation process was detected. Changes of aquatic organic matter (AOM) structure resulted from the influence of pre-ozonation were evaluated. Results show that dosage of O-3 and characteristics of AOM are two of the major factors influencing the performance of O-3 on coagulation. No significant coagulation-aid effect of O-3 was observed for all experiments using either AlCl3 or PACl On the contrary, with the application of pre-ozonation, the coagulation efficiency of AlCl3 was significantly deteriorated, reflected by the retardation of floe formation, and the removal decreases of turbidity, DOC, and UV254. However, if PACl was used instead of AlCl3, the adverse effects of pre-ozonation were mitigated obviously, particularly when the O-3 dosage was less than 0.69 (mg O-3/mg TOC). The difference between removals of UV254 and DOC indicated that pre-ozonation greatly changed the molecular structure of AOM, but its capability of mineralization was not remarkable. Only 5% or so DOC was removed by pre-ozonation at 0.6-0.8 mg/L alone. Fractionation results showed that the organic products of pre-ozonation exhibited lower molecular weight and more hydrophilicity, which impaired the removal of DOC in the following coagulation process. |
| WOS记录号 | WOS:000237568200007 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22987]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu, HL,Wang, DS,Shi, BY,et al. Effects of pre-ozonation on organic matter removal by coagulation with IPF-PACl[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2006,18(3):453-458. |
| APA | Liu, HL,Wang, DS,Shi, BY,Wang, M,&Tang, HX.(2006).Effects of pre-ozonation on organic matter removal by coagulation with IPF-PACl.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,18(3),453-458. |
| MLA | Liu, HL,et al."Effects of pre-ozonation on organic matter removal by coagulation with IPF-PACl".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 18.3(2006):453-458. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。