高性价比的用于阳离子染料去除的聚氯乙烯基吸附膜

IF 0.8 4区工程技术 Q4 ENGINEERING, CHEMICAL

Membrane Water Treatment Pub Date : 2020-03-01 DOI:10.12989/MWT.2020.11.2.131

M. Namvar-Mahboub, Z. Jafari, Yasaman Khojasteh

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引用次数: 1

摘要

目前的研究重点是制备低成本的聚氯乙烯基吸附膜。采用溶液共混法将偏高岭土作为吸附剂包埋在聚氯乙烯基体中。采用扫描电镜(SEM)、能量色散x射线能谱(EDS)、衰减全反射-傅里叶变换红外光谱(ATR-FTIR)、原子力显微镜(AFM)、纯水渗透率和接触角测量对制备的聚氯乙烯/偏高岭土混合基质膜进行了表征。结果表明，偏高岭土的存在改善了聚氯乙烯基体的PWP和亲水性。此外，偏高岭土在聚合物基体中的掺入改变了PVC膜的结构。所有样品的静态吸附能力通过染料去除测定。考察了偏高岭土用量(0 ~ 7%)和pH(4、8、12)对染料吸附能力的影响。结果表明，所有样品在pH = 4时的吸附量最高。此外，吸附数据拟合Langmuir, Freundlich和Temkin模型，以确定合适的控制等温线模型。最后，采用终端过滤池对最佳PVC/偏高岭土膜的动态吸附能力进行了研究。测定了纯PVC和PVC/偏高岭土膜对染料的去除率。结果表明，聚氯乙烯/偏高岭土混合基质膜对水溶液中染料有较高的吸附能力。

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Cost-effective polyvinylchloride-based adsorbing membrane for cationic dye removal

The current study focused on the preparation of low-cost PVC-based adsorbing membrane. Metakaolin, as available adsorbent, was embedded into the PVC matrix via solution blending method. The as-prepared PVC/metakaolin mixed matrix membranes were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, atomic force microscopy (AFM), pure water permeability and contact angle measurements. The results confirmed the improvement of PWP and hydrophilicity due to the presence of metakaolin in the PVC matrix. Additionally the structure of PVC membrane was changed due to the incorporation of metakaolin in the polymer matrix. The static adsorption capacity of all samples was determined through dye removal. The effect of metakaolin dosage (0-7%) and pH (4, 8, 12) on dye adsorption capacity was investigated. The results depicted that the highest adsorption capacity was achieved at pH of 4 for all samples. Additionally, adsorption data were fitted on Langmuir, Freundlich, and Temkin models to determine the appropriate governing isotherm model. Finally, the dynamic adsorption capacity of the optimum PVC/metakaolin membrane was studied using dead-end filtration cell. The dye removal efficiency was determined for pure PVC and PVC/metakaolin membrane. The results demonstrated that PVC/metakaolin mixed matrix membrane had a high adsorption capacity for dye removal from aqueous solution.

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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.