在莫来石和莫来石-氧化铝微滤支架上采用涂层法制造用于工业废水处理的二氧化钛和氧化锆陶瓷纳滤膜

IF 5.3 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Arabian Journal of Chemistry Pub Date : 2024-08-18 DOI:10.1016/j.arabjc.2024.105973
Iman Fooladi , Parnian Ghanbarizadeh , Ahmad Azari , Mohsen Abbasi , Rahim Karami , Mohammad Akrami
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引用次数: 0

摘要

工业废水处理越来越多地依赖于膜分离,陶瓷膜具有热稳定性和耐 pH 值等诸多优势。陶瓷膜对极端 pH 值条件的耐受性表明,当陶瓷膜暴露在高酸性或高碱性环境中时,仍能保持其结构和性能。我们开发了一种高渗透性陶瓷纳滤膜,它采用多层不对称设计,具有极佳的排斥率。首先,使用挤压法制造了两个管状多孔支撑物,即莫来石和莫来石-氧化铝,其重量百分比为 50。随后,通过溶胶-凝胶法制备了二氧化钛(TiO2)和二氧化钛-氧化锆(TiO2-ZrO2)胶体溶胶,并采用浸涂法将其涂在陶瓷支撑物上。使用 SEM、XRD 和 BET 分析膜的微观结构后,评估了膜处理合成含油废水的效率。结果表明,唐南排阻机制对纳滤膜的排阻效果有重大影响。压力的增加导致排斥率上升,最高可达 7 巴。莫来石-钛氧化锆(MTZ)和莫来石-氧化铝-钛氧化锆(MATZ)膜的化学需氧量(COD)去除率分别为 98.65 % 和 98 %。莫来石和莫来石-氧化铝支撑物以及 MTZ 和 MATZ 膜的纯水渗透性测试结果分别为 254、382、70 和 89 L bar-1m-2h-1。
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Titania and zirconia ceramic nanofiltration membrane fabrication by coating method on mullite and mullite-alumina microfiltration supports for industrial wastewater treatment

Industrial wastewater treatment increasingly relies on membrane separation, with ceramic membranes offering many advantages such as thermal stability and pH resistance. The resistance of ceramic membranes to extreme pH conditions indicates their ability to maintain structure and performance when exposed to highly acidic or alkaline environments. A high-permeability ceramic nanofiltration membrane was developed, boasting excellent rejection rates through a multilayer asymmetric design. Initially, two tubular porous supports, mullite and mullite-alumina, with a weight percent of 50, were fabricated using the extrusion method. Subsequently, a colloidal sol of titania (TiO2) and titania-zirconia (TiO2- ZrO2) was prepared via the sol–gel method and coated on the ceramic supports using the dip-coating method. After analyzing the membrane microstructure using SEM, XRD, and BET, the efficiency of the membranes in treating synthetic oily wastewater was evaluated. The results underscore the significant impact of the Donnan exclusion mechanism on the rejection of nanofiltration (NF) membranes. An increase in pressure led to a rise in rejection rates up to 7 bars. The Chemical Oxygen Demand (COD) rejection for mullite-titania zirconia (MTZ) and mullite-alumina-titania zirconia (MATZ) membranes was 98.65 % and 98 %, respectively. The pure water permeability test results for mullite and mullite-alumina supports, as well as MTZ and MATZ membranes, were recorded as 254, 382, 70, and 89 L bar-1m-2h−1, respectively.

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来源期刊
Arabian Journal of Chemistry
Arabian Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
10.80
自引率
3.30%
发文量
763
审稿时长
63 days
期刊介绍: The Arabian Journal of Chemistry is an English language, peer-reviewed scholarly publication in the area of chemistry. The Arabian Journal of Chemistry publishes original papers, reviews and short reports on, but not limited to: inorganic, physical, organic, analytical and biochemistry. The Arabian Journal of Chemistry is issued by the Arab Union of Chemists and is published by King Saud University together with the Saudi Chemical Society in collaboration with Elsevier and is edited by an international group of eminent researchers.
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