Université de Toulouse, IMT Mines Albi, RAPSODEE CNRS UMR-5302, Campus Jarlard, Albi cedex 09, F-81013, France.
International and Inter-University Centre for Nanoscience and Nanotechnology, and School of Energy Studies, Mahatma Gandhi University, Kottayam, 686 560, India.
Chemosphere. 2024 Sep;363:142779. doi: 10.1016/j.chemosphere.2024.142779. Epub 2024 Jul 5.
Nanocomposites have emerged as promising materials for pollutant removal due to their unique properties. However, conventional synthesis methods often involve toxic solvents or expensive materials. In this study, we present a novel ternary nanocomposite synthesized via a simple, cost-effective vacuum filtration method. The composite consists of calcium phosphate (CaP), biowaste-derived nanocellulose (diameter <50 nm) (NC), and chitosan (CH). The nanocomposite exhibited exceptional pollutant removal capabilities due to the hybrid approach of combining adsorption and size exclusion that widens and accelerates pollutant removal. When tested with synthetic wastewater containing 10 ppm of Ni ions and 10 ppm of Congo red (CR) dye, it achieved impressive removal rates of 98.7% for Ni ions and 100% for CR dye. Moreover, the nanocomposite effectively removed heavy metals such as Cd, Ag, Al, Fe, Hg, Mo, Li, and Se at 100%, and Ba, Be, P, and Zn at 80%, 92%, 87%, and 97%, respectively, from real-world municipal wastewater. Importantly, this green nanocomposite membrane was synthesized without the use of harmful chemicals or complex modifications and operated at a high flux rate of 146 L/m.h.MPa. Its outstanding performance highlights its potential for sustainable pollutant removal applications.
纳米复合材料因其独特的性质而成为有前途的污染物去除材料。然而，传统的合成方法通常涉及有毒溶剂或昂贵的材料。在本研究中，我们提出了一种通过简单、经济高效的真空过滤方法合成的新型三元纳米复合材料。该复合材料由磷酸钙（CaP）、生物废料衍生的纳米纤维素（直径<50nm）（NC）和壳聚糖（CH）组成。由于结合了吸附和尺寸排阻的混合方法，纳米复合材料表现出了出色的污染物去除能力，这种方法拓宽并加速了污染物的去除。当用含有 10ppm 的 Ni 离子和 10ppm 的刚果红（CR）染料的合成废水进行测试时，它对 Ni 离子的去除率达到了 98.7%，对 CR 染料的去除率达到了 100%。此外，该纳米复合材料还能有效去除重金属，如 Cd、Ag、Al、Fe、Hg、Mo、Li 和 Se，去除率分别为 100%、100%、92%、87%、97%、80%、92%、87%和 97%，从实际的城市废水中去除 Ba、Be、P 和 Zn，去除率分别为 80%、97%、97%和 97%。重要的是，这种绿色纳米复合膜是在不使用有害化学物质或复杂修饰的情况下合成的，其通量率高达 146L/m.h.MPa。其出色的性能突出了其在可持续污染物去除应用中的潜力。
