Modification of Biochar and Its Removal Mechanism of Phosphorus

How to effectively control water eutrophication is the current research hotspot in related fields. It has been found that modified biochar has great performance of adsorption of phosphorous. Therefore, this paper mainly discusses the modified biomass materials to remove phosphorus in eutrophication water. Firstlly, the present situation of phosphorus pollution in eutrophication water is introduced, and then phosphorus removal technology is described, especially the modified biomass phosphorus removal materials. The necessity of modification is demonstrated by comparing the physicochemical properties of unmodified and modified biomass. And all kinds of modified biomass materials discussed in this paper are listed as: acid and alkali modified biomass materials, metal-modified biomass materials, oxidizer activated biomass materials, magnetization modified biomass materials and so on. The meaning, application range, advantages and disadvantages of these modified biomass materials are also introduced in detail. In addition, this paper also introduces the mechanism of water purification of modified biomass materials, and briefly discusses its future development trend of the application of biomass sponge and biomass aerogel.