2023-05-10 ノースウェスタン大学
◆研究者たちは、汚染された水から濃度1ppm以上の鉛を除去するためにこのスポンジをテストした結果、使用後、鉛の濃度は検出限界を下回った。この新しいスポンジは、家庭用浄水器または大規模な環境浄化のための安価で使いやすいツールとして将来的に利用される可能性があるとされる。研究論文は、ACS ES&T Waterに掲載された。
＜関連情報＞
- https://news.northwestern.edu/stories/2023/05/metal-filtering-sponge-removes-lead-from-water/
- https://pubs.acs.org/doi/10.1021/acsestwater.2c00646
環境修復プラットフォーム「Nano-SCHeMe」：重金属用ナノマテリアルスポンジコーティング Nano-SCHeMe: Nanomaterial Sponge Coatings for Heavy Metals, an Environmental Remediation Platform
Benjamin Shindel, Stephanie M. Ribet, Caroline Harms, Vikas Nandwana, and Vinayak P. Dravid
ACS ES&T Water Published:May 10, 2023
DOI:https://doi.org/10.1021/acsestwater.2c00646
Abstract
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.
