A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination

The applications of forward osmosis (FO) have been hindered because of the lack of an optimal draw solution. The reverse salt flux from the draw solution not only reduces the water flux but also increases the cost of draw solute replenishment. Therefore, in this study, Tergitol NP7 and NP9 with a lo...

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Những tác giả chính:	Nguyen Thi Hau, Nguyen Cong Nguyen, Chen, Shiao-Shing, Ngo, Huu Hao, Guo, Wenshan, Li, Chi-Wang
Định dạng:	Journal article
Ngôn ngữ:	English
Được phát hành:	2023
Những chủ đề:	Forward osmosis; Draw solution; Water flux; Reverse salt flux
Truy cập trực tuyến:	https://scholar.dlu.edu.vn/handle/123456789/3019 https://www.sciencedirect.com/science/article/pii/S0048969715304976
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spelling	oai:scholar.dlu.edu.vn:123456789-30192023-09-28T06:25:48Z A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination Nguyen Thi Hau Nguyen Cong Nguyen Chen, Shiao-Shing Ngo, Huu Hao Guo, Wenshan Li, Chi-Wang Forward osmosis; Draw solution; Water flux; Reverse salt flux The applications of forward osmosis (FO) have been hindered because of the lack of an optimal draw solution. The reverse salt flux from the draw solution not only reduces the water flux but also increases the cost of draw solute replenishment. Therefore, in this study, Tergitol NP7 and NP9 with a long straight carbon chain and low critical micelle concentration (CMC) were coupled with highly charged ethylenediaminetetraacetic acid (EDTA) as an innovative draw solution to minimize reverse salt diffusion in FO for the first time. The results showed that the lowest reverse salt flux of 0.067 GMH was observed when 0.1M EDTA-2Na coupled with 15mM NP7 was used as a draw solution and deionized water was used as a feed solution in FO mode (active layer facing with the feed solution). This is due to the hydrophobic interaction between the tails of NP7 and the FO membrane, thus creating layers on the membrane surface and constricting the FO membrane pores. Moreover, 1M EDTA-2Na coupled with 15mM NP7 is promising as an optimal draw solution for brackish water and sea water desalination. Average water fluxes of 7.68, 6.78, and 5.95 LMH were achieved when brackish water was used as a feed solution (5, 10, and 20g/L NaCl), and an average water flux of 3.81 LMH was achieved when sea water was used as a feed solution (35g/L NaCl). The diluted draw solution was recovered using a nanofiltration (NF-TS80) membrane with a high efficiency of 95% because of the high charge and large size of the draw solution. 2023-09-28T06:25:44Z 2023-09-28T06:25:44Z 2015-12-15 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter 0048-9697 https://scholar.dlu.edu.vn/handle/123456789/3019 10.1016/j.scitotenv.2015.07.156 https://www.sciencedirect.com/science/article/pii/S0048969715304976 en
institution	Thư viện Trường Đại học Đà Lạt
collection	Thư viện số
language	English
topic	Forward osmosis; Draw solution; Water flux; Reverse salt flux
spellingShingle	Forward osmosis; Draw solution; Water flux; Reverse salt flux Nguyen Thi Hau Nguyen Cong Nguyen Chen, Shiao-Shing Ngo, Huu Hao Guo, Wenshan Li, Chi-Wang A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination
description	The applications of forward osmosis (FO) have been hindered because of the lack of an optimal draw solution. The reverse salt flux from the draw solution not only reduces the water flux but also increases the cost of draw solute replenishment. Therefore, in this study, Tergitol NP7 and NP9 with a long straight carbon chain and low critical micelle concentration (CMC) were coupled with highly charged ethylenediaminetetraacetic acid (EDTA) as an innovative draw solution to minimize reverse salt diffusion in FO for the first time. The results showed that the lowest reverse salt flux of 0.067 GMH was observed when 0.1M EDTA-2Na coupled with 15mM NP7 was used as a draw solution and deionized water was used as a feed solution in FO mode (active layer facing with the feed solution). This is due to the hydrophobic interaction between the tails of NP7 and the FO membrane, thus creating layers on the membrane surface and constricting the FO membrane pores. Moreover, 1M EDTA-2Na coupled with 15mM NP7 is promising as an optimal draw solution for brackish water and sea water desalination. Average water fluxes of 7.68, 6.78, and 5.95 LMH were achieved when brackish water was used as a feed solution (5, 10, and 20g/L NaCl), and an average water flux of 3.81 LMH was achieved when sea water was used as a feed solution (35g/L NaCl). The diluted draw solution was recovered using a nanofiltration (NF-TS80) membrane with a high efficiency of 95% because of the high charge and large size of the draw solution.
format	Journal article
author	Nguyen Thi Hau Nguyen Cong Nguyen Chen, Shiao-Shing Ngo, Huu Hao Guo, Wenshan Li, Chi-Wang
author_facet	Nguyen Thi Hau Nguyen Cong Nguyen Chen, Shiao-Shing Ngo, Huu Hao Guo, Wenshan Li, Chi-Wang
author_sort	Nguyen Thi Hau
title	A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination
title_short	A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination
title_full	A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination
title_fullStr	A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination
title_full_unstemmed	A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination
title_sort	new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination
publishDate	2023
url	https://scholar.dlu.edu.vn/handle/123456789/3019 https://www.sciencedirect.com/science/article/pii/S0048969715304976
_version_	1778792478952914944

A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination

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