Organic-Inorganic hybrid membrane for simultaneous heavy metal removal at drinking water pollution concentration levels

吸附 污染 废水 石墨烯 流出物 饮用水净化 氧化物 化学 金属 污染 环境化学 环境工程 环境科学 材料科学 纳米技术 有机化学 生态学 生物化学 生物
作者
Ali Alsalme
出处
期刊:Microchemical Journal [Elsevier BV]
卷期号:195: 109447-109447 被引量:4
标识
DOI:10.1016/j.microc.2023.109447
摘要

This study proposes a novel approach for simultaneous removal of potentially toxic metals from contaminated drinking water. The strategy is based on multi-layer graphene oxide hybrid membranes made up of Fe3O4@amyloid fibrils nanoclusters intercalated into the graphene oxide sheets via flow through approach. The hybrid membrane outperforms the previously known graphene-based membranes with adsorption capacity in the range of 128–570 mg g−1 of material. The membrane's removal efficacy exceeds 99.9% in both low (150 µg/L) and high (10,000 µg/L) metal concentration regimes, representative of ground water and wastewater contamination and complies with WHO drinking water requirements. Following NSF/ANSI 42,53–2007a American Standard Regulations, samples with metal concentrations of 150 µg/L and 20 mg L−1 calcium coexisted at pH 6.5 ± 0.25, complete removal of heavy metals (100%) in the effluent was observed. Benchmark testing on real municipal and ground water samples in continuous operation mode shows that ∼ 7500 and 5000 L water/g of membrane were treated well while maintaining WHO drinking water standards. The saturated membrane regenerated and successfully reused several times without losing purification performance. The present technique shows a great deal for addressing the worldwide problem of contaminated drinking water due to good selectivity, low fabrication cost, and excellent performance on real water.
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