Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation

Ethylenediaminetetraacetic acid disodium (EDTA-2Na) has been demonstrated as an excellent draw solution in the forward osmosis (FO) process because of its high osmotic pressure together with low reverse salt flux but its application is hindered by difficulties in the recovery of draw solution. Hence...

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Những tác giả chính:	Nguyen Cong Nguyen, Shiao-Shing Chen, Su-Thing Ho, Nguyen Thi Hau, Saikat Sinha Ray, Nhat Thien Nguyen, Hung-Te Hsu, Ngoc Chung Le, Thi Tinh Tran
Định dạng:	Journal article
Ngôn ngữ:	English
Được phát hành:	2023
Những chủ đề:	Forward osmosis, Membrane distillation, Waste heat source, Draw solution, Recovery
Truy cập trực tuyến:	https://scholar.dlu.edu.vn/handle/123456789/3006 https://www.sciencedirect.com/science/article/pii/S1383586616313776
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spelling	oai:scholar.dlu.edu.vn:123456789-30062023-09-28T05:55:35Z Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation Nguyen Cong Nguyen Shiao-Shing Chen Su-Thing Ho Nguyen Thi Hau Saikat Sinha Ray Nhat Thien Nguyen Hung-Te Hsu Ngoc Chung Le Thi Tinh Tran Forward osmosis, Membrane distillation, Waste heat source, Draw solution, Recovery Ethylenediaminetetraacetic acid disodium (EDTA-2Na) has been demonstrated as an excellent draw solution in the forward osmosis (FO) process because of its high osmotic pressure together with low reverse salt flux but its application is hindered by difficulties in the recovery of draw solution. Hence, in this study, microporous hydrophobic membranes were used in direct contact membrane distillation (DCMD) to concentrate the diluted EDTA-2Na draw solution. The MD was found to require lower operating pressures than do all other widely applied pressure-driven membrane processes, particularly in RO. This study systematically investigated the effect of different polytetrafluoroethylene membranes under various cross flow velocities of 2.67–14.67cm/s, feed temperatures of 35–60°C, and distillate temperatures of 10–20°C in DCMD process for regeneration of diluted EDTA-2Na. The results revealed that DCMD system could achieve a salinity rejection rate exceeding 99.99%; furthermore, the conductivity of the permeate distillate was consistently below 6.4µS/cm for all of the EDTA-2Na feed concentrations. More importantly, the water flux slightly decreased from 8.27 to 7.04L/m2h when the concentration of the EDTA-2Na feed increased from 0.1 to 0.5M, corresponding to increased osmolality from 300 to 1411mOsm/kg, indicating that water flux in DCMD is not significantly influenced by the osmotic pressure gradient across the membrane. This study demonstrated that MD could be an effective method for EDTA-2Na recovery in FO–MD systems and could economically utilize the wasted heat from industrial sources. 2023-09-28T05:55:31Z 2023-09-28T05:55:31Z 2018-06-08 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter 1383-5866 https://scholar.dlu.edu.vn/handle/123456789/3006 10.1016/j.seppur.2017.02.001 https://www.sciencedirect.com/science/article/pii/S1383586616313776 en Separation and Purification Technology
institution	Thư viện Trường Đại học Đà Lạt
collection	Thư viện số
language	English
topic	Forward osmosis, Membrane distillation, Waste heat source, Draw solution, Recovery
spellingShingle	Forward osmosis, Membrane distillation, Waste heat source, Draw solution, Recovery Nguyen Cong Nguyen Shiao-Shing Chen Su-Thing Ho Nguyen Thi Hau Saikat Sinha Ray Nhat Thien Nguyen Hung-Te Hsu Ngoc Chung Le Thi Tinh Tran Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation
description	Ethylenediaminetetraacetic acid disodium (EDTA-2Na) has been demonstrated as an excellent draw solution in the forward osmosis (FO) process because of its high osmotic pressure together with low reverse salt flux but its application is hindered by difficulties in the recovery of draw solution. Hence, in this study, microporous hydrophobic membranes were used in direct contact membrane distillation (DCMD) to concentrate the diluted EDTA-2Na draw solution. The MD was found to require lower operating pressures than do all other widely applied pressure-driven membrane processes, particularly in RO. This study systematically investigated the effect of different polytetrafluoroethylene membranes under various cross flow velocities of 2.67–14.67cm/s, feed temperatures of 35–60°C, and distillate temperatures of 10–20°C in DCMD process for regeneration of diluted EDTA-2Na. The results revealed that DCMD system could achieve a salinity rejection rate exceeding 99.99%; furthermore, the conductivity of the permeate distillate was consistently below 6.4µS/cm for all of the EDTA-2Na feed concentrations. More importantly, the water flux slightly decreased from 8.27 to 7.04L/m2h when the concentration of the EDTA-2Na feed increased from 0.1 to 0.5M, corresponding to increased osmolality from 300 to 1411mOsm/kg, indicating that water flux in DCMD is not significantly influenced by the osmotic pressure gradient across the membrane. This study demonstrated that MD could be an effective method for EDTA-2Na recovery in FO–MD systems and could economically utilize the wasted heat from industrial sources.
format	Journal article
author	Nguyen Cong Nguyen Shiao-Shing Chen Su-Thing Ho Nguyen Thi Hau Saikat Sinha Ray Nhat Thien Nguyen Hung-Te Hsu Ngoc Chung Le Thi Tinh Tran
author_facet	Nguyen Cong Nguyen Shiao-Shing Chen Su-Thing Ho Nguyen Thi Hau Saikat Sinha Ray Nhat Thien Nguyen Hung-Te Hsu Ngoc Chung Le Thi Tinh Tran
author_sort	Nguyen Cong Nguyen
title	Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation
title_short	Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation
title_full	Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation
title_fullStr	Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation
title_full_unstemmed	Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation
title_sort	optimising the recovery of edta-2na draw solution in forward osmosis through direct contact membrane distillation
publishDate	2023
url	https://scholar.dlu.edu.vn/handle/123456789/3006 https://www.sciencedirect.com/science/article/pii/S1383586616313776
_version_	1778792474666336256

Optimising the recovery of EDTA-2Na draw solution in forward osmosis through direct contact membrane distillation

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