Recovery of Pure Water, Salicylic Acid Crystals, and Paracetamol using PVDF-MWCNT Membranes by Membrane Distillation-crystallization

IF 0.3 4区材料科学 Q4 POLYMER SCIENCE Journal of Polymer Materials Pub Date : 2023-05-01 DOI:10.32381/jpm.2022.39.3-4.9

Nikhil R. MENE, Sarita Kalla, Z. Murthy

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Abstract

Membrane distillation-crystallization (MDC) is presented as a novel technique in the treatment of waste concentrated water which produces valuable crystals along with pure water. In the present study, multi-walled carbon nanotubes (MWCNT)/polyvinylidene fluoride (PVDF) flat sheet membranes were prepared via the wet phase inversion method and applied in MDC for the treatment of pharmaceutical waste. The pure and modified membrane surface properties are characterized with the help of SEM, FTIR, and contact angle measurement. The present work reported the effect of MWCNT content and feed temperature on the MDCperformance and measured pure water flux and pharmaceutical compounds recovery. The observed maximum permeate flux and crystal recovery for Salicylic acid system was 5.5 kg/m2h and 50%, respectively for PVDF+0.5% CNT membrane and 5 kg/m2h and 48%, respectively for pure PVDF. Also, for paracetamol system it was 3.9 kg/m2h and 41% for PVDF +0.5% CNT membrane and 3.5 kg/ m2h and 38% for pure PVDF. Obtained results show that MDC has good potential in treating pharmaceutical waste.

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PVDF-MWCNT膜蒸馏结晶法回收纯水、水杨酸晶体和扑热息痛

膜蒸馏结晶(MDC)是一种处理废浓缩水的新技术，它可以在纯水的同时产生有价值的结晶。本研究采用湿相转化法制备了多壁碳纳米管(MWCNT)/聚偏氟乙烯(PVDF)平板膜，并将其应用于多壁碳纳米管/聚偏氟乙烯(PVDF)平板膜处理医药废弃物。利用扫描电镜(SEM)、红外光谱(FTIR)和接触角测量等手段对纯膜和改性膜的表面性能进行了表征。本工作报道了MWCNT含量和进料温度对mdc性能的影响，并测量了纯水通量和药物化合物回收率。水杨酸体系中PVDF+0.5% CNT膜的最大渗透通量和晶体回收率分别为5.5 kg/m2h和50%，纯PVDF膜的最大渗透通量和晶体回收率分别为5 kg/m2h和48%。此外，对于扑热息痛体系，PVDF +0.5% CNT膜为3.9 kg/m2h，为41%，纯PVDF为3.5 kg/m2h，为38%。结果表明，MDC在处理医药废弃物方面具有良好的潜力。

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来源期刊

Journal of Polymer Materials 工程技术-高分子科学

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

4.7 months

期刊介绍： Journal of Polymer Materials-An International Journal is published quarterly (4 issues per year), which covers broadly most of the important and fundamental areas of Polymer Science and Technology. It reports reviews on current topics and original research results on synthesis of monomers and polymers, polymer analysis, characterization and testing, properties of polymers, structure-property relation, polymer processing and fabrication, and polymer applications. Research and development activities on functional polymers, polymer blends and alloys, composites and nanocomposites, paints and surface coatings, rubbers and elastomeric materials, and adhesives are also published.