Lanthanum activated palygorskite for selective phosphate separation from aqueous media: Comprehensive understanding of adsorptive behavior and mechanism affected by interfering substances

doi:10.1016/j.cej.2022.136423

IR > 土木工程学院

	Lanthanum activated palygorskite for selective phosphate separation from aqueous media: Comprehensive understanding of adsorptive behavior and mechanism affected by interfering substances
	Mi, Xiao 1; Yu, Fan 1; Zhang, Huining2 ; Chen, Rongfan 3; Hu, Xiaoling 3; Zhang, Wei 4; Wang, Bin 3
	2022-09-01
发表期刊	Chemical Engineering Journal
ISSN	1385-8947
卷号	443
摘要	Eutrophication problem in surface waterbodies has attracted increasing attention. Herein, raw palygorskite (PAL) was activated by lanthanum engineering in alkaline surrounding for phosphate removal, and alkaline etching modified its structure and facilitated phosphate migration from bulk solution to active sites. Results indicated that stable and satisfactory phosphate capturing was maintained by as-prepared material within a wide pH range (3–9) and the disturbance of co-existing substances (Cl-, NO3–, HCO3–, SO42–, F- and HA). Further investigation on the role of interfering species in overall adsorption process indicated that phosphate capturing was accelerated rather than hindered at the initial hours, while the ultimate captured amount decreased owing to their competitive occupation on La active sites. Kinetic study suggested the chemisorption of phosphate and isotherm investigation illustrated the multilayer coverage of phosphate on the heterogeneous surface. Thermodynamic study implied spontaneous and endothermic process of phosphate uptake on La-PAL, and cyclic desorption-adsorption experiments demonstrated feasible regeneration and reuse of La-PAL for phosphate separation. Materials characterization demonstrated the formation of amorphous La-O-P inner-sphere complex through ligands exchange (i.e., –CO3–, –OH), whereas the interference of co-existing substances by competitive occupation and overlap on active sites was indicated. The present work could provide comprehensive insight into the role of interfering substances in phosphate adsorption on functionalized materials. © 2022 Elsevier B.V.
关键词	Adsorption Etching Eutrophication Lanthanum compounds Separation Active site Adsorption behaviour Alkalines Aqueous media Co-existing Co-existing substance Interfering substances Palygorskites Phosphate separation Waterbodies
DOI	10.1016/j.cej.2022.136423
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Environmental ; Engineering, Chemical
WOS记录号	WOS:000799988300003
出版者	Elsevier B.V.
EI入藏号	20221712009075
EI主题词	Alkalinity
EI分类号	801.1 Chemistry, General ; 802.2 Chemical Reactions ; 802.3 Chemical Operations
来源库	WOS
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/158477
专题	土木工程学院
通讯作者	Wang, Bin
作者单位	1.North China Univ Water Resources & Elect Power, Sch Environm & Municipal Engn, Zhengzhou 450011, Henan, Peoples R China; 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Peoples R China; 3.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China; 4.Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Peoples R China
推荐引用方式 GB/T 7714	Mi, Xiao,Yu, Fan,Zhang, Huining,et al. Lanthanum activated palygorskite for selective phosphate separation from aqueous media: Comprehensive understanding of adsorptive behavior and mechanism affected by interfering substances[J]. Chemical Engineering Journal,2022,443.
APA	Mi, Xiao.,Yu, Fan.,Zhang, Huining.,Chen, Rongfan.,Hu, Xiaoling.,...&Wang, Bin.(2022).Lanthanum activated palygorskite for selective phosphate separation from aqueous media: Comprehensive understanding of adsorptive behavior and mechanism affected by interfering substances.Chemical Engineering Journal,443.
MLA	Mi, Xiao,et al."Lanthanum activated palygorskite for selective phosphate separation from aqueous media: Comprehensive understanding of adsorptive behavior and mechanism affected by interfering substances".Chemical Engineering Journal 443(2022).