Comparison of negatively and positively charged thin-film nanocomposite membranes for boron removal

IF 1.4 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Lee Wei Poh, Nurul Hazirah Hasnol, Syed M. Saufi
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引用次数: 0

Abstract

The increasing demand for boron has resulted in its contamination of water supplies. Nanofiltration membranes, particularly thin-film nanocomposite (TFN) membranes, have shown promise in removing contaminants. This study evaluated the boron removal capabilities of negatively and positively charged TFN membranes alongside a control thin-film composite (TFC) membrane without nanoparticles. Piperazine (PIP, for negatively charged membrane) or polyethyleneimine (PEI, for positively charged membrane) aqueous monomer was reacted with trimesoyl chloride (TMC) in n-hexane solution via interfacial polymerization (IP) on the polyethersulfone (PES) membrane substrate to form the TFC membrane. During the TFN membrane preparation, titanium dioxide (TiO₂) and sulfocalix[4]arene (SCA4) were introduced as active nanoparticles to the aqueous monomer. Boron removal performance was evaluated using a 10 ppm aqueous boron solution. The PES substrate gave the highest water flux, which was 307.80 LMH. For the TFC membrane, TFC–PIP had a higher water flux at 113.71 LMH than TFC–PEI. Furthermore, the TFN membranes containing the PEI monomer had a lower water flux than those containing the PIP monomer. These findings highlight the potential of TFN membranes, particularly those incorporating nanoparticles, for effective boron removal. Further research and optimization of TFN membranes can contribute to addressing the challenge of boron contamination in water supplies.

带负电和带正电的纳米复合薄膜除硼效果比较
对硼的需求不断增加,导致供水受到污染。纳滤膜,尤其是纳米复合薄膜(TFN),在去除污染物方面已显示出良好的前景。本研究评估了带负电荷和带正电荷的 TFN 膜与不含纳米颗粒的对照薄膜复合 (TFC) 膜的除硼能力。哌嗪(PIP,用于带负电的膜)或聚乙烯亚胺(PEI,用于带正电的膜)水性单体在正己烷溶液中通过界面聚合(IP)与聚醚砜(PES)膜基质中的三甲基甲酰氯(TMC)反应,形成 TFC 膜。在制备 TFN 膜的过程中,二氧化钛(TiO₂)和硫代羰基[4]炔(SCA4)作为活性纳米颗粒被引入到水性单体中。使用 10ppm 的硼水溶液对硼的去除性能进行了评估。PES 基底的水通量最高,达到 307.80 LMH。就 TFC 膜而言,TFC-PIP 的水通量比 TFC-PEI 高,为 113.71 LMH。此外,含有 PEI 单体的 TFN 膜的水通量低于含有 PIP 单体的 TFN 膜。这些发现凸显了 TFN 膜,尤其是含有纳米颗粒的 TFN 膜在有效去除硼方面的潜力。对 TFN 膜的进一步研究和优化有助于应对供水中硼污染的挑战。
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来源期刊
自引率
11.10%
发文量
111
期刊介绍: Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).
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