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Lanthanum ferrite nanoparticles modification onto biochar: derivation from four different methods and high performance for phosphate adsorption

文献类型： 外文期刊

作者： Yang, Bei 1 ; Feng, Yanfang 1 ; Yu, Yingliang 1 ; He, Shiyin 1 ; Liu, Hao 2 ; Xue, Lihong 1 ; Yang, Linzhang 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Minist Agr & Rural, Key Lab Agroenvironm Downstream Yangtze Plain, Nanjing 210014, Jiangsu, Peoples R China

2.Nanjing Hydraul Res Inst, State Lab Hydrol Water Resources & Hydraul Engn, Nanjing 210029, Jiangsu, Peoples R China

关键词： LaFeO3; Biochar; Modification; Phosphate; High performance; Adsorption

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期： 2019 年 26 卷 21 期

页码：

收录情况： SCI

摘要： To effectively remove phosphate pollution and convectively reuse phosphate resource, straw biochar was firstly functionalized with lanthanum ferrite (LaFeO3) via four different methods, including one-step co-precipitation (S-C), two-step co-precipitation (B-C), one-step impregnation (S-E), and two-step impregnation (B-E). LaFeO3/biochar was characterized systematically by a series of characterization methods. The influence of preparation methods, operation conditions on adsorption process, and the regenerability were studied. The products prepared by four methods displayed different physical morphology and chemical analysis proved chemical composition were similar. LaFeO3/biochar exhibited high adsorption capacity, the pseudo-second-order and Sips models were fitted for the adsorption equilibrium. The LaFeO3/biochar exhibited outstanding phosphate adsorption performance with pH values ranging from 2.3 to 10.6; La ions release was similarly negligible, when pH value was higher than 5.27. The adsorption mechanism was studied and inferred that La species is the key to adsorption ability. The results obtained provide better understanding of the adsorption phenomena and indicate the available preparation technologies and potential usefulness of LaFeO3/biochar for removing phosphate pollution.

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