Ultralong hydroxyapatite-based forward osmosis membrane for freshwater generation  

作　　者：Mohamed Gamal Gomaa Hamdy Maamoun Abdel-Ghafar Francesco Galiano Francesca Russo Alberto Figoli El-Sayed Ali Abdel-Aal Abdel-Hakim Taha Kandil Bahaa Ahmed Salah 

机构地区：[1]Central Metallurgical Research and Development Institute(CMRDI),11421 Cairo,Egypt [2]Chemistry Department,Faculty of Science,Helwan University,11795 Cairo,Egypt [3]Institute on Membrane Technology(CNR-ITM),87036 Rende,Italy

出　　处：《Frontiers of Chemical Science and Engineering》2024年第9期37-49,共13页化学科学与工程前沿（英文版）

基　　金：received fund through the CNR-ASRT(Italy-Egypt)2022-2023 international Exchanges(project ID:18775);the Science and Technology Development Fund(STDF),projects ID 41528 and 43224。

摘　　要：Increasing global water shortages are accelerating the pace of membrane manufacturing,which generates many environmentally harmful solvents.Such challenges need a radical rethink of developing innovative membranes that can address freshwater production without generating environmentally harmful solvents.This work utilized the synthesized ultra-long hydroxyapatite(UHA)by the solvothermal method using the green solvent oleic acid in preparing UHA-based forward osmosis membranes.The membranes were developed using different loading ratios of graphene oxide(GO)by vacuum-assisted filtration technique.The prepared GO/UHA membranes were identified using X-ray diffraction,scanning electron microscope,Fourier-transform infrared spectroscopy,and X-ray photoelectron spectroscopy.Water contact angle and pore size distribution were determined for the obtained GO/UHA membranes.The obtained hierarchical porous structure in the prepared membranes with interconnected channels results in a stable water flux with reverse salt flux.The best water flux rate of 42±2 L·m^(–2)·h^(–1)was achieved using the 50 mg GO/UHA membrane,which is 3.3 times higher than the pristine membrane,and a reverse salt flux of 67 g·m^(-2)·h^(–1).The obtained results showed a promising capability of a new generation of sustainable inorganic-based membranes that can be utilized in freshwater generation by energy-efficient techniques such as forward osmosis.

关 键 词：forward osmosis ultra-long hydroxyapatite graphene oxide inorganic-based membrane 

分 类 号：TB43[一般工业技术]