Adsorption Behavior Of Phosphorus In Water By Iron-Zirconium Loaded Biochar

Due to the high concentration of total phosphorus in the lake?>0.02 mg/L?,most lakes in China have different degrees of eutrophication.The adsorption method has attracted more and more attention in reducing the total phosphorus pollution in water due to its economy and the recyclability of materials.Therefore,this study intends to carry out adsorption method to remove total phosphorus pollution in water,prepare sludge biochar with different temperature conditions,and load modification with iron and zirconium metal ions;analyze the adsorption effect of the biochar material on phosphorus in water The prepared biochar materials were characterized by SEM,FTIR,XRD,etc.,and their internal morphology and adsorption effects were investigated.The main contents and conclusions are summarized as follows:?1?In a certain temperature range,the raw biochar prepared by putting the original sludge into the muffle furnace and calcined at 600°C for 2 h has the largest specific surface area and the best loading efficiency for iron and zirconium;?2?Comparing the removal effect of iron-zirconium-loaded biochar,iron-loaded biochar,zirconium-loaded biochar,and raw biochar on phosphorus,it is found that the molar ratio of n Fe³⁺:n Zr⁴⁺=3:7 is the best for the composite of zirconium-loaded composites;?3?By analyzing the preparation conditions of sludge bio-carbon materials,the iron and zirconium metal ions were found to be 40 mg/L of orthophosphoric acid in 200 mL of ultrapure water with 0.4 g/L of material,and the potassium solution was adsorbed for 120 min in a 200 r/min constant temperature shaker to obtain a maximum adsorption capacity of the composite material of 46.76 mg/g;?4?The adsorption-desorption experiment was carried out on the material,and the material was reused,showing that the removal efficiency of the material was reduced to a certain value and was basically stable.