改性水葫芦生物炭对磷的吸附性能研究

Study on Adsorption Properties of Modified Biomass Carbon of Eihhornia crassipes to Phosphorus

摘要: 不同的生物炭对水体中磷的吸附效果不同，因此筛选制备低成本、高效、环境友好的吸附剂对废水处理有着现实意义。本文采用水葫芦来制备生物质炭，通过锰、镁改性以期提高生物质炭对水体中磷的吸附性能。通过实验研究，发现未改性、锰改性和镁改性生物炭对水体中磷的吸附性能各不相同。其中，锰改性生物质、镁改性生物炭和未改性生物炭对磷的最大吸附量分别为13.21 mg∙g⁻¹、52.49 mg∙g⁻¹和98.04 mg∙g⁻¹，其中对锰改性生物炭对磷的吸附量是未改性生物质炭的7.42倍。从实验结果看出水葫芦制备生物质炭可以对水体中磷有一定的修复作用，同时也可实现水生植物的资源化利用，具有很好的应用前景。

Abstract: Different biochar have different adsorption effects on phosphorus in water, so it is of practical sig-nificance to screen and prepare low-cost, efficient and environmentally friendly adsorbents for wastewater treatment. In this paper, Eichhornia crassipes was used to prepare biomass carbon, which was modified by manganese and magnesium in order to improve the adsorption performance of biomass carbon to phosphorus in water. It was found that the adsorption properties of unmodified, manganese modified and magnesium modified biochar to phosphorus in water were different. Among them, the maximum phosphorus adsorption capacity of manganese modified bi-omass, magnesium modified biochar and unmodified biochar is 13.21 mg∙g⁻¹, 52.49 mg∙g⁻¹ and 98.04 mg∙g⁻¹, respectively, and the phosphorus adsorption capacity of manganese modified biochar is 7.42 times that of unmodified biochar. The experimental results show that the biomass charcoal prepared by Eihhornia crassipes has a certain remediation effect on phosphorus in water, and can also realize the resource utilization of aquatic plants, which has a good application prospect.