Centre for Water Sciences, Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, Punjab, India.
Chitkara University School of Basic Sciences, Chitkara University, Baddi, Himachal Pradesh, India.
Environ Sci Pollut Res Int. 2020 Dec;27(36):44771-44796. doi: 10.1007/s11356-020-10738-8. Epub 2020 Sep 25.
Effective and substantial remediation of contaminants especially heavy metals from water is still a big challenge in terms of both environmental and biological perspectives because of their adverse effects on the human health. Many techniques including adsorption, ion exchange, co-precipitation, chemical reduction, ultrafiltration, etc. are reported for eliminating heavy metal ions from the water. However, adsorption has preferred because of its simple and easy handlings. Several types of adsorbents are observed and documented well for the purpose. Recently, highly porous metal-organic frameworks (MOFs) were developed by incorporating metals and organic ligands together and claimed as potent adsorbents for the remediation of highly toxic heavy metals from the aqueous solutions due to their unique features like greater surface area, high chemical stability, green and reuse material, etc. In this review, the authors discussed systematically some recent developments about secure MOFs to eliminate the toxic metals such as arsenic (both arsenite and arsenate), chromium(VI), cadmium (Cd), mercury (Hg) and lead (Pb). MOFs are observed as the most efficient adsorbents with greater selectivity as well as high adsorption capacity for metallic contamination. Graphical abstract.
从环境和生物学的角度来看，有效且大量地修复水中的污染物，尤其是重金属，仍然是一个巨大的挑战，因为它们会对人类健康产生不良影响。许多技术，包括吸附、离子交换、共沉淀、化学还原、超滤等，都被报道用于从水中去除重金属离子。然而，由于其简单易用的特点，吸附受到了青睐。已经观察到并记录了几种类型的吸附剂用于该目的。最近，通过将金属和有机配体结合在一起，开发出了高度多孔的金属有机骨架（MOFs），并因其具有更大的表面积、高化学稳定性、绿色和可重复使用的材料等独特特性，被宣称是从水溶液中修复高毒性重金属的有效吸附剂。在这篇综述中，作者系统地讨论了一些关于安全 MOFs 的最新发展，以去除有毒金属，如砷（亚砷酸盐和砷酸盐）、铬（VI）、镉（Cd）、汞（Hg）和铅（Pb）。MOFs 被观察到是最有效的吸附剂，具有更高的选择性和对金属污染的高吸附能力。
