Chlorinated Methylsiloxanes Generated in the Papermaking Process and Their Fate in Wastewater Treatment Processes
文献类型：期刊论文
| 作者 | Xu, Lin; He, Xudan; Zhi, Liqin ; Zhang, Chunhui; Zeng, Tao; Cai, Yaqi
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
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| 出版日期 | 2016-12-06 |
| 卷号 | 50期号:23页码:12732-12741 |
| 英文摘要 | Simulated experiments indicated that chlorinated volatile methylsiloxanes, detected by QTOF GC/MS, could be generated in a pulp bleaching process, where poly(dimethylsiloxane)s fluids with volatile methylsiloxanes as impurities and molecular chlorine were used as a defoamer and bleaching agent, respectively. In the producing processes of one papermaking factory, the mean total concentrations of monochlorinated D4, D5, and D6, i.e., D3D(CH2Cl), D4D(CH2Cl), and D5D(CH2Cl), were 0.0430-287 mu g/L in aqueous samples, while they were 0.0329-270 mu g/g in solid samples. In the coupled papermaking-wastewater treatment processes, D3D(CH2Cl), D4D(CH2Cl), and D5D(CH2Cl) were detected in all water (0.113-8.68 mu g/L) and solid samples (0.888-26.2 mu g), with solid-water partition values (468-3982 L/kg) 1.08-4.82 times higher than those of their corresponding nonchlorinated analogs. The removing efficiencies of D3D(CH2Cl) D5D(CH2Cl) in the whole wastewater treatment processes were 77.1-81.6%, and sorption to sludge (35.7-74.1%) and removal in the primary clarifier (7.19-32.5%) had major contributions to their total removal. Elimination experiments showed that 1) hydrolysis half-lives of D3D(CH2Cl) D5D(CH2Cl) (0.9-346 h) in the primary clarifier (pH = 7.8-9.2) were 2.16-3.60 times shorter than those of their nonchlorinated analogs; 2) D3D(CH2Cl) D5D(CH2Cl) were hardly degraded in oxic sludge treatment process, and their volatilization half-lives (7.38-21.1 h) in oxic sludge were 1.21-1.50 times longer than those of their nonchlorinated analogs. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35817]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Xu, Lin,He, Xudan,Zhi, Liqin,et al. Chlorinated Methylsiloxanes Generated in the Papermaking Process and Their Fate in Wastewater Treatment Processes[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(23):12732-12741. |
| APA | Xu, Lin,He, Xudan,Zhi, Liqin,Zhang, Chunhui,Zeng, Tao,&Cai, Yaqi.(2016).Chlorinated Methylsiloxanes Generated in the Papermaking Process and Their Fate in Wastewater Treatment Processes.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(23),12732-12741. |
| MLA | Xu, Lin,et al."Chlorinated Methylsiloxanes Generated in the Papermaking Process and Their Fate in Wastewater Treatment Processes".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.23(2016):12732-12741. |
入库方式： OAI收割
来源：生态环境研究中心
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