Highly effective nanoparticle removal in plant-based water filters
Highly effective nanoparticle removal in plant-based water filters
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在植物水过滤器中高效去除纳米颗粒
DOI：
10.1039/d3va00035d
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Kumar, Manish
中科院分区：
文献类型：
--
作者：
Samineni, Laxmicharan;DeRespino, Sophie;Depaolis, Mekayla;Mohanty, Rashmi P.;Tu, Yu-Ming;Pemmaraju, Sanjana;Velegol, Stephanie;Ghosh, Debadyuti;Kumar, Manish
纳米技术的优势及其潜在风险引起了越来越多的纳米颗粒（NP）污染环境及其对人类健康的潜在影响的报告。水处理设施是暴露于NP污染的关键节点，但也提供了捕获NP以最大限度地减少暴露的机会。不幸的是，典型的饮用水处理系统不适合完全去除NP。事实上，水处理技术在去除病毒（天然NP）方面面临的挑战是能源-水关系的一个明显例子。任何即将出台的针对控制工程和偶然NP的法规都必然会增加现有技术的负担。为了应对这一新出现的挑战，我们确定了利用植物基材料制成的深层过滤器高效去除人造和天然NP的可行性。使用能够快速定量NP浓度的高分辨率分析技术，我们表明，用辣木种子中的阳离子蛋白质官能化的棉纤维对模型纳米塑料和金属纳米颗粒的去除率大于4 log 10（99.99%）。 我们的研究结果还表明，实现的去除是一致的pH值和盐度的范围内典型的饮用水处理。在这项研究中提出的过滤器显示出作为一个低成本和可持续的解决方案，用于捕获NP污染的负载率典型的传统水处理的承诺。
There is emerging discussion over the advantages of nanotechnology and its prospective risks prompted by increasing reports of nanoparticle (NP) contamination of the environment and its potential impacts on human health. Water treatment facilities are a critical node for exposure to NP contamination but also offer an opportunity for their capture to minimize the exposure. Unfortunately, the typical drinking water treatment train is not suitable for the complete removal of NPs. In fact, the challenges facing the water treatment techniques with the removal of viruses (natural NPs) present a marked example of the energy-water nexus. Any upcoming regulations targeting the control of engineered and incidental NPs are bound to increase the burden on the available techniques. To address this emerging challenge, we established the feasibility of high-efficiency removal of man-made and natural NPs with a depth filter fabricated from plant-based materials. Using high-resolution analytical techniques that enable quick quantification of NP concentration, we showed that cotton fiber functionalized with cationic proteins from Moringa oleifera seeds achieve removals greater than 4 log10 (99.99%) for model nano-plastics and metal nanoparticles. Our results also show that the removals achieved are consistent under a range of pH values and salinities typical to drinking water treatment. The proposed filters in this study show promise as a low-cost and sustainable solution for the capture of NP contamination at loading rates typical to conventional water treatment.
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