Preparation method and application of secondary lanthanum carbide modified sludge biochar

The invention discloses a preparation method and application of secondary lanthanum carbide modified sludge biochar, belongs to the field of functional materials and environmental water treatment, and is used for removing phosphate in municipal sewage. According to the method, the residual sludge is used as a biochar raw material, and after lanthanum modification, the efficient, economical and environment-friendly adsorbent BC-La-BC is prepared through pyrolysis. When the adding amount of the BC-La-BC is 10mg and the pH value is 3.0, the adsorption capacity is the maximum. In an experiment for removing municipal sewage by using a fixed bed column, the treatment time of 1-2g of BC-La-BC is 2.92-5.08 hours at the flow rate of 5mL/min. The lanthanum modified sludge biochar prepared by the scheme not only recycles residual sludge, but also has relatively strong adsorption capacity on phosphate, and the highest adsorption capacity can reach 131.58 mg/g. 本发明公开了一种二次碳化镧改性污泥生物炭的制备方法及其应用，属于功能材料和环境水处理领域，用来去除市政污水中的磷酸盐。此发