Effective Phosphate adsorption by LaFeO3 nanoparticles uploaded onto biochar
作者单位：Key Laboratory of Agro-Environment in Downstream of Yangtze PlainMinistry of AgricultureInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural Sciences State Laboratory of Hydrology-Water Resources and Hydraulic EngineeringNanjing Hydraulic Research Institute
会议名称：《第二届全国环境纳米技术及生物效应学术研讨会》
会议日期：2018年
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学]
关 键 词：LaFeO3 biochar preparation methods Phosphate adsorption
摘 要：In this paper,straw biochar was firstly modified with lanthanum ferrite *** methods were developed to prepare LaFeO/***-step impregnation(S-E) and two-step impregnation(B-E).The LaFeO/biochar derived from the two methods was utilized to remove phosphate from *** means of SEM,BET,VSM,XRD and *** effects of the different preparation methods on the morphology,magnetism,and structure of he samples are *** results imply the biochar is successfully modified by LaFeO,*** maximum adsorption capacity was 40.99 mg/g(S-E) and 40.11 mg/g(B-E),implying that LaFeO/biochar is an effective adsorbent for phosphate removal Pseudo-first-order,*** and Freundlich models were used to simulate the kinetic data and equilibrium adsorption isotherms LaFeO/biochar exhibits an outstanding adsorption performance for phosphate with pH values ranging from 2 to 10,and the adsorption performance decreases as the pH *** a magnet can effectively recollect the adsorbent,and a negligible adsorption capacity loss was observed after five adsorption-desorption cycles.