磷是水体富营养化的限制性污染因子,吸附法是污水深度除磷的常用技术之一。在众多吸附材料中,纳米金属氧化物因活性位点多、选择性强等特点被认为是理想的除磷吸附剂,但也存在易团聚、难操作、易流失等应用瓶颈。生物质材料来源广、成本低,具有丰富的孔隙结构和较高的比表面积,且富含羟基、羧基等功能基团,是纳米金属氧化物理想的载体材料。对生物基金属氧化物复合纳米材料在污水除磷领域的研究进展进行了总结和评述,介绍了材料的制备方法及深度除磷机制,并对其未来的研究发展方向进行了展望。
Phosphorus is regarded as the restrictive pollution factor for eutrophication,and adsorption is one of the commonly used technologies for advanced phosphate removal.Among the various adsorbent materials,nano-metal oxides have been proved to be a kind of promising adsorbents for selective phosphate removal because of their high specific surface area,adequate adsorption sites and excellent selectivity.However,there are application bottlenecks such as easy agglomeration,difficult operation,and easy loss.Biomass materials can be used as the ideal carrier materials for nano-metal oxides on account of their wide sources and low cost,abundant pore structure and large specific surface area,as well as rich in hydroxyl,carboxyl and other functional groups.This article reviewed the research progress of biomass-based metal oxide nanocomposites for advanced phosphate removal from water,analyzed the preparation methods of the materials and their dephosphorization mechanism.Also,the prospects of the development concerning biomass-based metal oxide nanocomposites for phosphate removal were briefly discussed.
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基金资助
国家自然科学基金(52070160);江苏省产学研合作项目(BY2020454);扬州大学高端人才支持计划;宜兴市“陶都英才”创新创业人才项目(CX202011C);2021年度宜兴市科技新专项资金重点研发项目(Y2022002);江苏省大学生实践创新训练计划项目(X20210576)
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