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Boron removal and desalination from seawater by PVDF flat-sheet membrane through direct contact membrane distillation
Hou, Deyin; Dai, Guohua; Wang, Jun; Fan, Hua; Luan, Zhaokun; Fu, Chaochen; Hou, DY
2013
Source PublicationDESALINATION
Volume326Issue:1Pages:115-124
AbstractBoron removal and desalination from seawater by direct contact membrane distillation (DCMD) was studied with self-prepared polyvinylidene fluoride (PVDF) flat-sheet membrane. The membrane had an ultra-thin top skin and a porous network sponge-like layer and its effective pores showed a narrow distribution with a mean pore size of 022 mu m. The membrane exhibited good hydrophobicity and its contact angle was about 82.6 +/- 0.7 degrees. During DCMD test of 35 g/L sodium chloride solution, the maximum permeate flux can achieve 47.6 kg/m(2) h. The natural seawater containing 4.65 mg/L boron was treated by DCMD for simultaneous boron removal and desalination. Although the permeate flux decreased with concentration factor (CF) value increase, the permeate boron kept below 20 mu g/L and salt rejection was over 99.9%. When the CF value exceeded 4.0, there would be scale deposits formed, and the permeate quality and flux declined rapidly. The antiscalant polyaciylic acid could delay the deposit formation and the advisable dosage was 10 mg/L The membrane showed satisfying performance stability in a 300 h continuous DCMD experiment even with the CF value as high as 7.0, indicating that the self-prepared membrane and DCMD process could be efficiently used for boron removal and desalination from seawater. (C) 2013 Elsevier B.V. All rights reserved.
Department环境水质学国家重点实验室
Indexed BySCI
WOS IDWOS:000324973800015
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/7390
Collection环境水质学国家重点实验室
Corresponding AuthorHou, DY
Recommended Citation
GB/T 7714
Hou, Deyin,Dai, Guohua,Wang, Jun,et al. Boron removal and desalination from seawater by PVDF flat-sheet membrane through direct contact membrane distillation[J]. DESALINATION,2013,326(1):115-124.
APA Hou, Deyin.,Dai, Guohua.,Wang, Jun.,Fan, Hua.,Luan, Zhaokun.,...&Hou, DY.(2013).Boron removal and desalination from seawater by PVDF flat-sheet membrane through direct contact membrane distillation.DESALINATION,326(1),115-124.
MLA Hou, Deyin,et al."Boron removal and desalination from seawater by PVDF flat-sheet membrane through direct contact membrane distillation".DESALINATION 326.1(2013):115-124.
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