Absence of biopolymers in surface waters inhibits flocs growth in winter: A secret of coagulation over decades
文献类型：期刊论文
| 作者 | Su, Zhaoyang ; Wu, Xiaoting; Yu, Wenbao; Liu, Ting; Li, Xing; Liu, Muyang; Yu, Wenzheng
|
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2022 |
| 卷号 | 375页码:134243-1-11 |
| 关键词 | Coagulation Low temperature Biopolymers Particles Floc formation |
| ISSN号 | 0959-6526 |
| 英文摘要 | Factors responsible for undesirable coagulation performance in winter have not been well understood by far. The aim of this work is to identify the critical factor(s) and to provide applicable suggestions for drinking water production under low temperature. Specifically, water samples were collected from the river Jingmi (JM), a major drinking water source of Beijing City (China), for a series of coagulation tests. Coagulation processes influenced by factors, including particles and organic matter (natural biopolymers and humics) which commonly present in surface waters, were investigated. A photometric dispersion analyzer (PDA) was employed to reveal flocs formation and their properties impacted by water temperature, ranging from 5 degrees C to 25 degrees C. Results showed that the absence of natural biopolymers (40-90 kDa, identified as mixtures of proteins and polysaccharides) in surface water in winter significantly hindered flocs growth at low temperature; flocs size and growth rate continuously improved with artificially increasing concentration of biopolymers with/without particulates (kaolin particles in this study), demonstrating positive roles of biopolymers in coagulating kaolinite/organic water. Nanoscale observation on flocs using scanning electron microscope (SEM) demonstrated a bridging capability of biopolymers in aggregating primary particles into larger clusters, and this facilitated flocs growth at low temperature. The findings of this work are expected to improve the understanding of coagulation mecha-nisms under low temperature, also contributing to better management of coagulation when purifying surface water during winter months. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/48530]  |
| 专题 | 生态环境研究中心_水污染控制实验室 |
| 作者单位 | 1.Research Center for Eco-Environmental Sciences (RCEES) 2.Beijing Institute of Technology 3.Beijing University of Technology 4.Chinese Academy of Sciences |
| 推荐引用方式 GB/T 7714 | Su, Zhaoyang,Wu, Xiaoting,Yu, Wenbao,et al. Absence of biopolymers in surface waters inhibits flocs growth in winter: A secret of coagulation over decades[J]. JOURNAL OF CLEANER PRODUCTION,2022,375:134243-1-11. |
| APA | Su, Zhaoyang.,Wu, Xiaoting.,Yu, Wenbao.,Liu, Ting.,Li, Xing.,...&Yu, Wenzheng.(2022).Absence of biopolymers in surface waters inhibits flocs growth in winter: A secret of coagulation over decades.JOURNAL OF CLEANER PRODUCTION,375,134243-1-11. |
| MLA | Su, Zhaoyang,et al."Absence of biopolymers in surface waters inhibits flocs growth in winter: A secret of coagulation over decades".JOURNAL OF CLEANER PRODUCTION 375(2022):134243-1-11. |
入库方式： OAI收割
来源：生态环境研究中心
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