金属元素改性生物质炭应用于磷酸盐吸附的研究进展

磷含量过高是造成农业面源污染以及水体富营养化的主要原因,因此如何科学合理地控制农业径流以及河流湖泊中的磷酸盐浓度,对农业面源污染及水体富营养化防控具有重要意义。在众多磷酸盐固持方法中,生物质炭吸附法得到相关研究领域的广泛关注。未经改性的生物质炭对磷酸盐的吸附效率不佳,而通过金属元素改性能够显著提高该材料的磷酸盐吸附性能。本综述着重介绍不同金属元素(镁、钙、铁、镧及双金属)改性生物质炭应用于磷酸盐吸附领域中的主要制备方法和研究思路,并总结出该类材料在磷酸盐吸附过程中的主要影响因素,旨在为农业面源污染及水体富营养化防控提供科学依据和理论支撑。

Research progress of metal-modified biochar for phosphate adsorption

High phosphorus content is the main cause of agricultural non-point source pollution and eutrophication. Therefore, scientifically and rationally controlling the phosphate concentration in rivers, lakes, and agricultural runoff is of great significance to their prevention and control. Among the many phosphate retention methods, biochar adsorption has received extensive attention in related fields. However, unmodified biochar has poor adsorption efficiency for phosphates, and metal-element modification can significantly improve the phosphate adsorption performance of the materials. This review introduces the main preparation methods and research ideas of different metal element (i.e., magnesium, calcium, iron, strontium, and bimetal)modified biochars, applied in the field of phosphate adsorption. It summaries the main influences of these materials in the phosphate adsorption process. It aims to provide scientific bases and theoretical support for the prevention and control of agricultural non-point source pollution and water eutrophication.