标题:Adsorption of phosphate from aqueous solution by vegetable biochar/layered double oxides: Fast removal and mechanistic studies
作者:Zhang, Zhaoran ;Yan, Liangguo ;Yu, Haiqin ;Yan, Tao ;Li, Xuguang
作者机构:[Zhang, Zhaoran ;Yan, Liangguo ;Yu, Haiqin ;Yan, Tao ;Li, Xuguang ] School of Water Conservancy and Environment, University of Jinan, Key Laboratory o 更多
通讯作者:Yan, Liangguo
来源:Bioresource Technology
出版年:2019
页码:65-71
DOI:10.1016/j.biortech.2019.03.113
摘要:Two biochars, from Chinese cabbage (Cc, Brassica rapa pekinensis) and rape (Ra, Brassia campestris L.), were used to prepare biochar/Mg-Al layered double oxides (LDOs) as adsorbents for phosphate removal from aqueous solution. The biochar/LDOs were horizontally alternated lamellar particles and had abundant groups of oxides and biochars. The phosphate removal percentage remained above 92% at a pH range of 2–10, and above 95% during the first 5 min for 50 mg/L phosphate by 0.05 g biochar/LDOs. The adsorption kinetics and isotherms data were well fitted by the pseudo-second-order kinetic equation, as well as by the Freundlich and Langmuir models. Based on FTIR, XPS, and zeta potential analysis, the interaction mechanisms were defined as “memory effect” electrostatic attraction, surface complexation, and anion exchange. The results indicate that vegetable biochar/LDOs can be considered a novel and efficient sorbent for phosphate removal from water or wastewater.
© 2019 Elsevier Ltd
收录类别:EI
资源类型:期刊论文
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