纳米金属氧化物吸附剂除砷研究进展

Research progress of arsenic removal by nano-metal oxide adsorbents

综述了国内外诸多纳米金属氧化物吸附剂在除砷领域的研究现状和进展,系统地总结了不同类型纳米金属氧化物的材料组成、物相特性、吸附机制、吸附能力、应用情况等。阐述了单一、二元和三元金属氧化物纳米材料在除砷领域的应用。通过不同纳米金属氧化物的比表面积、吸附容量、除砷效率、适用pH范围等指标对比评估材料除砷性能优劣,并探讨了主要的吸附机理。总结归纳了当前纳米金属氧化物吸附剂除砷技术面临的转化应用难度大、再生性能差等问题,并提出了多金属协同、多种机理配合、优化设计专属性等具有一定参考价值的纳米金属氧化物吸附剂未来发展对策和建议。

The current research status and progress of many domestic and foreign metal oxide nanomaterials 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 capacity,arsenic removal efficiency,applicable pH range and other indicators of different metal oxide nanomaterials are compared to assess the advantages and disadvantages of the materials’arsenic removal performance,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-metal oxide adsorbents.