聚苯乙烯基Ce-La双金属氧化物对磷的吸附特性

李含; 申萌萌; 楼冉; 陈嘉超; 陈志辉; 朱雅娴; 杨文澜

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中国环境科学 ›› 2024, Vol. 44 ›› Issue (11) : 6201-6209.

水污染与控制

聚苯乙烯基Ce-La双金属氧化物对磷的吸附特性

李含^1,2, 申萌萌¹, 楼冉¹, 陈嘉超¹, 陈志辉¹, 朱雅娴¹, 杨文澜¹

作者信息 +

Adsorption characteristics of polystyrene-based Ce-La bimetal oxides for phosphate

LI Han^1,2, SHEN Meng-meng¹, LOU Ran¹, CHEN Jia-chao¹, CHEN Zhi-hui¹, ZHU Ya-xian¹, YANG Wen-lan¹

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摘要

Ce-La bimetal oxides (CLBOs) nanoparticles were immobilized within the pores of a polystyrene anion exchanger (PAE) to fabricate a polystyrene-based nanocomposite CLBOs@PAE for efficient phosphate removal from acidic wastewater. Experimental results indicated that CLBOs@PAE exhibited excellent stability at pH≥3, and acidic conditions favor its adsorption of phosphate. At a pH of 4 and an initial phosphate concentration of 30mg/L, the maximum phosphate adsorption capacity reached 56.71mg/L. The phosphate adsorption process of CLBOs@PAE followed pseudo-second-order kinetics, achieving adsorption equilibrium within 180minutes. Benefiting from the preferential adsorption of embedded CLBOs nanoparticles towards phosphate (involving hydroxyl ligand exchange and inner-sphere complexation), CLBOs@PAE showed significant phosphate adsorption selectivity in the presence of high concentrations of coexisting anions (SO₄^2-, HCO₃^-, NO₃^- and Cl^-). Fixed-bed adsorption experiments demonstrated that at an influent phosphate concentration of 5mg/L, CLBOs@PAE exhibited an effective treatment capacity of up to 5000BV before reaching the breakthrough point (0.5mg/L). Moreover, CLBOs@PAE displayed excellent desorption and regeneration properties, maintaining a relatively stable adsorption capacity over long-term cyclic use, highlighting its promising potential for phosphate removal in acidic wastewater treatment.

Abstract

导出引用

李含, 申萌萌, 楼冉, 陈嘉超, 陈志辉, 朱雅娴, 杨文澜. 聚苯乙烯基Ce-La双金属氧化物对磷的吸附特性[J]. 中国环境科学. 2024, 44(11): 6201-6209

LI Han, SHEN Meng-meng, LOU Ran, CHEN Jia-chao, CHEN Zhi-hui, ZHU Ya-xian, YANG Wen-lan. Adsorption characteristics of polystyrene-based Ce-La bimetal oxides for phosphate[J]. China Environmental Science. 2024, 44(11): 6201-6209

中图分类号： X703.5

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基金

国家自然科学基金资助面上项目(52070160);江苏省重点研发计划社会发展项目(BE2023751);扬州大学高端人才支持计划项目;宜兴市“陶都英才”创新创业人才项目(CX202011C);宜兴市科技创新专项资金资助重点研发项目(Y2022002);江苏省大学生创新创业训练计划项目(X20220563)