Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process
Forward osmosis (FO) has emerged as a viable technology to alleviate the global water crisis. The greatest challenge facing the application of FO technology is the lack of an ideal draw solution with high water flux and low reverse salt flux. Hence, the objective of this study was to enhance FO by l...
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
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2023
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| Truy cập trực tuyến: | https://scholar.dlu.edu.vn/handle/123456789/3004 https://doi.org/10.1007/s11356-017-9192-1 |
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oai:scholar.dlu.edu.vn:123456789-30042023-09-28T05:46:11Z Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process Nguyen Cong Nguyen Chen, Shiao-Shing Jain, Shubham Nguyen Thi Hau Ray, Saikat Sinha Ngo, Huu Hao Guo, Wenshan Lâm, Ngọc Tuấn Duong, Hung Cong Forward osmosis (FO) has emerged as a viable technology to alleviate the global water crisis. The greatest challenge facing the application of FO technology is the lack of an ideal draw solution with high water flux and low reverse salt flux. Hence, the objective of this study was to enhance FO by lowering reverse salt flux and maintaining high water flux; the method involved adding small concentrations of Al2(SO4)3 to a MgCl2 draw solution. Results showed that 0.5 M MgCl2 mixed with 0.05 M of Al2(SO4)3 at pH 6.5 achieved a lower reverse salt flux (0.53 gMH) than that of pure MgCl2 (1.55 gMH) using an FO cellulose triacetate nonwoven (CTA-NW) membrane. This was due possibly to the flocculation of aluminum hydroxide in the mixed draw solution that constricted membrane pores, resulting in reduced salt diffusion. Moreover, average water fluxes of 4.09 and 1.74 L/m2-h (LMH) were achieved over 180 min, respectively, when brackish water (5 g/L) and sea water (35 g/L) were used as feed solutions. Furthermore, three types of membrane distillation (MD) membranes were selected for draw solution recovery; of these, a polytetrafluoroethylene membrane with a pore size of 0.45 μm proved to be the most effective in achieving a high salt rejection (99.90%) and high water flux (5.41 LMH) in a diluted draw solution. 2023-09-28T05:46:05Z 2023-09-28T05:46:05Z 2017-05-19 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter 1614-7499 https://scholar.dlu.edu.vn/handle/123456789/3004 10.1007/s11356-017-9192-1 https://doi.org/10.1007/s11356-017-9192-1 en |
| institution |
Thư viện Trường Đại học Đà Lạt |
| collection |
Thư viện số |
| language |
English |
| description |
Forward osmosis (FO) has emerged as a viable technology to alleviate the global water crisis. The greatest challenge facing the application of FO technology is the lack of an ideal draw solution with high water flux and low reverse salt flux. Hence, the objective of this study was to enhance FO by lowering reverse salt flux and maintaining high water flux; the method involved adding small concentrations of Al2(SO4)3 to a MgCl2 draw solution. Results showed that 0.5 M MgCl2 mixed with 0.05 M of Al2(SO4)3 at pH 6.5 achieved a lower reverse salt flux (0.53 gMH) than that of pure MgCl2 (1.55 gMH) using an FO cellulose triacetate nonwoven (CTA-NW) membrane. This was due possibly to the flocculation of aluminum hydroxide in the mixed draw solution that constricted membrane pores, resulting in reduced salt diffusion. Moreover, average water fluxes of 4.09 and 1.74 L/m2-h (LMH) were achieved over 180 min, respectively, when brackish water (5 g/L) and sea water (35 g/L) were used as feed solutions. Furthermore, three types of membrane distillation (MD) membranes were selected for draw solution recovery; of these, a polytetrafluoroethylene membrane with a pore size of 0.45 μm proved to be the most effective in achieving a high salt rejection (99.90%) and high water flux (5.41 LMH) in a diluted draw solution. |
| format |
Journal article |
| author |
Nguyen Cong Nguyen Chen, Shiao-Shing Jain, Shubham Nguyen Thi Hau Ray, Saikat Sinha Ngo, Huu Hao Guo, Wenshan Lâm, Ngọc Tuấn Duong, Hung Cong |
| spellingShingle |
Nguyen Cong Nguyen Chen, Shiao-Shing Jain, Shubham Nguyen Thi Hau Ray, Saikat Sinha Ngo, Huu Hao Guo, Wenshan Lâm, Ngọc Tuấn Duong, Hung Cong Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process |
| author_facet |
Nguyen Cong Nguyen Chen, Shiao-Shing Jain, Shubham Nguyen Thi Hau Ray, Saikat Sinha Ngo, Huu Hao Guo, Wenshan Lâm, Ngọc Tuấn Duong, Hung Cong |
| author_sort |
Nguyen Cong Nguyen |
| title |
Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process |
| title_short |
Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process |
| title_full |
Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process |
| title_fullStr |
Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process |
| title_full_unstemmed |
Exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process |
| title_sort |
exploration of an innovative draw solution for a forward osmosis-membrane distillation desalination process |
| publishDate |
2023 |
| url |
https://scholar.dlu.edu.vn/handle/123456789/3004 https://doi.org/10.1007/s11356-017-9192-1 |
| _version_ |
1778792474003636224 |