二氧化锰基纳米材料对重金属离子的去除及机理研究进展
Removal of heavy metal ions by manganese dioxide-based nanomaterials and mechanism research: A review
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摘要: 重金属离子对人类健康和环境安全产生了严重威胁，因此重金属废水高效处理成为了环境领域最具挑战性的热点问题之一.二氧化锰（MnO2）是一种环境友好型金属氧化物，具有来源广泛、成本低廉、形貌多样、晶型丰富、结构稳定、粒径可控等优异的性质，在重金属离子的去除应用上展现出巨大的潜力.近年来，人们利用MnO2基纳米材料在重金属离子的有效治理方面开展了大量的研究.本文综述了MnO2基纳米材料在重金属离子环境修复方面取得的研究进展，包括MnO2的制备和改性方法，MnO2基纳米材料在水溶液重金属离子去除中的应用及吸附作用机制，并对研究方向进行了总结和展望，旨在为进一步设计合成对重金属离子的吸附去除具有实际应用价值的MnO2基纳米材料提供参考.Abstract: Heavy metal ions pollution poses a serious threat to human health and environment safety, so the efficient treatment of heavy metal wastewater has become one of the most challenging hot issues in the environmental field. Manganese dioxide (MnO2), an environment-friendly metal oxide, shows great potential applications in the field of heavy metal ions' removal, which are mainly attributed to their multiple advantages, such as wide source, low cost, various morphologies, rich crystal forms, stable structure, controllable particle size. Recently, people have carried out a large number of researches on the effective treatment of heavy metal ions by using MnO2-based nanomaterials. This paper reviewed the research progress of MnO2-based nanomaterials in the environmental remediation of heavy metal ions, including the preparation and modification methods of MnO2, the application and adsorption mechanism of MnO2-based nanomaterials in the removal of heavy metal ions from aqueous solution. Summary and outlook for this research direction were also briefly addressed. This paper aimed to provide a reference for the further design and synthesis of MnO2-based nanomaterials with practical potential for adsorbing heavy metal ions in aqueous solutions.
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