首页|Mechanism study of Cu(Ⅱ)adsorption from acidic wastewater by ultrasonic-modified municipal solid waste incineration fly ash
Mechanism study of Cu(Ⅱ)adsorption from acidic wastewater by ultrasonic-modified municipal solid waste incineration fly ash
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High concentrations of copper ions(Cu(Ⅱ))in water will pose health risks to humans and the ecological environment.Therefore,this study aims to utilize ultrasonic-cured modified municipal solid waste incineration(MSWI)fly ash for Cu(Ⅱ)adsorption to achieve the purpose of"treating waste by waste."The effects of pH,adsorption time,initial concentration,and temperature on the modified MSWI fly ash's adsorption efficiency were systematically studied in this article.The adsorption performance of the modified MSWI fly ash can be enhanced by the ultrasonic modification.At pH=2,3 and 4,the adsorption capacity of the modified MSWI fly ash for Cu(Ⅱ)increased by 2.7,1.9 and 1.2 times,respec-tively.Furthermore,it was suggested that the adsorption process of the modified MSWI fly ash can be better simulated by the pseudo-second-order kinetic model,with a maximum adsorption capacity calculated by the Langmuir model of 24.196 mg·g-1.Additionally,the adsorption process is spontaneous,endothermic,and chemisorption-dominated from the thermodynamic studies(ΔH and ΔS＞0,ΔG＜0).Finally,the enhanced adsorption performance of the modified MSWI fly ash for Cu(Ⅱ)may be attributed to electrostatic interaction and chelation effects.
UltrasoundMSWI fly ashCu(Ⅱ)WastewaterAdsorption
Shunda lin、Yang Lu、Lin Zheng、Ling Long、Xuguang Jiang、Jianhua Yan
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State Key Laboratory of Clean Energy Utilization,Institute for Thermal Power Engineering,Zhejiang University,Hangzhou 310027,China
Zhejiang University Qingshanhu Energy Research Center,Hangzhou 310027,China
Hangzhou Xiaoshan Jinjiang Green Energy Co.,Ltd.,Xiaoshan,Hangzhou 310000,China
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