Nano-SCHeMe: Nanomaterial Sponge Coatings for Heavy Metals, an Environmental Remediation Platform
Nano-SCHeMe: Nanomaterial Sponge Coatings for Heavy Metals, an Environmental Remediation Platform
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DOI：
10.1021/acsestwater.2c00646
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发表时间：
2023-05-10
期刊：
影响因子：
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通讯作者：
Dravid，Vinayak P.
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文献类型：
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作者：
Shindel，Benjamin;Ribet，Stephanie M.;Dravid，Vinayak P.
我们的供水中存在的重金属构成了巨大的全球公共卫生负担。重金属消费与死亡率增加和广泛的潜在健康后果有关。近年来，纳米技术在解决环境问题方面取得了长足的进步，特别是设计吸附剂来解毒水，以及在低浓度下回收有价值金属的相关挑战。然而，大规模应用纳米材料并区分哪些纳米材料最适合特定应用可能具有挑战性。在这里，我们报告了一种方法，用于将纳米材料涂层加载到吸附膜上，测试不同的涂层，并在各种条件下利用这些材料。我们定制的铅修复涂层由掺锰针铁矿纳米颗粒制成，当涂覆在纤维素膜上时，可以将污染水中的铅过滤到可检测水平以下，并且通过温和调节pH，涂覆的膜可以回收并重复使用多次循环。SCheMe方法展示了一种平台方法，可有效地将纳米材料用于环境应用，并可直接和公平地比较这些纳米材料。此外，这种方法是灵活和可扩展的，因为我们的涂料有潜力应用于一系列吸附剂。
The presence of heavy metals in our water supply poses an immense global public health burden. Heavy metal consumption is tied to increased mortality and a wide range of insidious health outcomes. In recent years, great strides have been made toward nanotechnological approaches for environmental problems, specifically the design of adsorbents to detoxify water, as well as for a related challenge of recovering valuable metals at low concentrations. However, applying nanomaterials at scale and differentiating which nanomaterials are best suited for particular applications can be challenging. Here, we report a methodology for loading nanomaterial coatings onto adsorbent membranes, testing different coatings against one another, and leveraging these materials under a variety of conditions. Our tailored coating for lead remediation, made from manganese-doped goethite nanoparticles, can filter lead from contaminated water to below detectable levels when coated onto a cellulose membrane, and the coated membrane can be recovered and reused for multiple cycles through mild tuning of pH. The Nano-SCHeMe methodology demonstrates a platform approach for effectively deploying nanomaterials for environmental applications and for direct and fair comparisons among these nanomaterials. Moreover, this approach is flexible and expansive in that our coatings have the potential to be applied to a range of sorbents.