Title : ( Channelization of water pathway and encapsulation of DS in the SL of the TFC FO membrane as a novel approach for controlling dilutive internal concentration polarization )
Authors: mehrzad arjmandi , Majid Peyravi , Mahdi Pourafshari Chenar , Mohsen Jahanshahi ,
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Abstract
In this study, we explored the use of hydrophobic (ZIF-8) and hydrophilic (UiO-66) water-stable metal–organic-frameworks (MOFs) as well as their mixture for the fabrication of high-performance mixed-matrix membrane (MMM)-based thin film composite (TFC) forward osmosis (FO) membranes for controlling internal concentration polarization (ICP). According to the characteristic curve, the use of UiO-66 inside the support layer (SL) resulted in a negative effect on FO selectivity and positive effect on FO water permeability. Moreover, after the incorporation of ZIF-8 into the SL, the FO selectivity and FO water permeability increased and decreased, respectively. However, the incorporation of the mixture of ZIF-8 and UiO-66 (ZIF-8@UiO-66) into the SL (TFC-ZIF-UiO) caused positive effects on both FO water permeability and selectivity. Channelization and fast water transport through the UiO-66 cavities and the encapsulation of draw solution (DS) into the ZIF-8 cavities are the main reasons for increasing the water flux in the TFC-ZIF-UiO FO membrane. However, the long-time experiment showed that this phenomenon requires time. After replacing DI water with Caspian seawater, the more positive impact of using the TFC-ZIF-UiO membrane is more evident. Therefore, the strategy of using a mixture of hydrophobic and hydrophilic MOFs inside the SL of the TFC FO membranes is of great interest and potential for advancing membrane performance in water and wastewater treatment
Keywords
, Channelization, water pathway and encapsulation of DS, TFC FO membrane, internal concentration polarization
@article{paperid:1075688,
author = {Arjmandi, Mehrzad and Majid Peyravi and Pourafshari Chenar, Mahdi and محسن جهانشاهی},
title = {Channelization of water pathway and encapsulation of DS in the SL of the TFC FO membrane as a novel approach for controlling dilutive internal concentration polarization},
journal = {Environmental Science: Water Research and Technology},
year = {2019},
volume = {5},
number = {8},
month = {January},
issn = {2053-1400},
pages = {1436--1452},
numpages = {16},
keywords = {Channelization; water pathway and encapsulation of DS; TFC FO membrane; internal concentration polarization},
}
%0 Journal Article
%T Channelization of water pathway and encapsulation of DS in the SL of the TFC FO membrane as a novel approach for controlling dilutive internal concentration polarization
%A Arjmandi, Mehrzad
%A Majid Peyravi
%A Pourafshari Chenar, Mahdi
%A محسن جهانشاهی
%J Environmental Science: Water Research and Technology
%@ 2053-1400
%D 2019
