Removal of reactive black 5 dye by using polyoxometalate-membrane

IF 0.8 4区工程技术 Q4 ENGINEERING, CHEMICAL

Membrane Water Treatment Pub Date : 2021-01-01 DOI:10.12989/MWT.2021.12.1.023

A. Topaloğlu, Y. Yildirim

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引用次数: 3

Abstract

A POM-membrane was fabricated by immobilizing a keggin type polyoxometalate (POM) H5PV2Mo10O40 onto the surface of microporous flat-sheet polymeric polyvinylidene fluoride (PVFD) membrane using a chemical deposition method. The POM-membrane was characterized by FT-IR, SEM and EDX to confirm existing of the POM onto the membrane surface. The POM-membrane was used to remove an anionic textile dye (Reactive Black 5 named as an RB5) from aqueous phases with a cross-flow membrane filtration and a batch adsorption system. The dye removal efficiency of the POM-membrane using the cross-flow membrane filtration system and the batch adsorption system was about 88% and 98%, respectively. The influence factors such as contact time, adsorbent dosage, pH, and initial dye concentration were investigated to understand the adsorption mechanism of the RB5 dye onto the POM-membrane. To find the best fitting isotherm model, Langmuir, Freundlich, BET and Harkins-Jura isotherm models were used to analyze the experimental data. The isotherm analysis showed that the Langmuir isotherm model was found to the best fit for the adsorption data (R 2=0.9982, qmax=24.87 mg/g). Also, adsorption kinetic models showed the pseudo second order kinetic model was found the best model to fit the experimental data (R2=0.9989, q=8.29 mg/g, C0=15 ppm). Moreover, after four times regeneration with HNO3 acid, the POM-membrane showed high regenerability without losing dye adsorption capacity.

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多金属酸氧膜法去除活性黑5染料

采用化学沉积法将keggin型聚金属氧酸盐(POM) H5PV2Mo10O40固定在微孔平板聚偏氟乙烯(PVFD)膜表面，制备了聚偏氟乙烯膜。通过FT-IR、SEM和EDX对聚甲醛膜进行表征，证实了聚甲醛在膜表面的存在。采用交叉流膜过滤和间歇吸附系统，将pom -膜用于去除水中的阴离子纺织染料(活性黑5，简称RB5)。跨流膜过滤系统和间歇吸附系统对pom -膜的去除率分别为88%和98%左右。考察了接触时间、吸附剂用量、pH、初始染料浓度等因素对RB5染料在pom膜上的吸附机理。采用Langmuir、Freundlich、BET和Harkins-Jura等温线模型对实验数据进行了分析，以寻找最合适的等温线模型。等温线分析表明，Langmuir等温线模型最适合吸附数据(r2 =0.9982, qmax=24.87 mg/g)。吸附动力学模型表明，拟二级动力学模型最适合实验数据(R2=0.9989, q=8.29 mg/g, C0=15 ppm)。经4次HNO3酸再生后，pom -膜在不损失染料吸附能力的情况下表现出较高的可再生性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Membrane Water Treatment ENGINEERING, CHEMICAL-WATER RESOURCES

CiteScore

1.90

自引率

30.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Membrane and Water Treatment(MWT), An International Journal, aims at opening an access to the valuable source of technical information and providing an excellent publication channel for the global community of researchers in Membrane and Water Treatment related area. Specific emphasis of the journal may include but not limited to; the engineering and scientific aspects of understanding the basic mechanisms and applying membranes for water and waste water treatment, such as transport phenomena, surface characteristics, fouling, scaling, desalination, membrane bioreactors, water reuse, and system optimization.