Research progress of arsenic removal by nano-metal oxide adsorbents
The current research status and progress of many domestic and foreign metal oxide nanomateri-als adsorbents in the field of arsenic removal are reviewed,and the material compositions,physical phase properties,adsorption mechanisms,adsorption capacities,and applications of different types of metal oxide nanomaterials are systematically summarized.The applications of single,binary and ternary metal oxide nanomaterials in the field of arsenic removal are elaborated.The specific surface area,adsorption capaci-ty,arsenic removal efficiency,applicable pH range and other indicators of different metal oxide nanomate-rials are compared to assess the advantages and disadvantages of the materials'arsenic removal perform-ance,and the main adsorption mechanisms are discussed.It also summarizes the problems faced by the current arsenic removal technology of nano-metal oxide adsorbents,such as the difficulty of conversion and application,poor regeneration performance,etc.,and puts forward the future development countermeasures and suggestions of nano-metal oxide adsorbents with certain reference value,such as the synergy of multi-metal,the cooperation of multiple mechanisms,and the optimization of the design of proprietary nano-met-al oxide adsorbents.
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