SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 67 ›› Issue (3): 157-165.DOI: 10.1016/j.cjche.2023.11.019

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Mechanism study of Cu(II) adsorption from acidic wastewater by ultrasonic-modified municipal solid waste incineration fly ash

Shunda lin1,2, Yang Lu1,2, Lin Zheng3, Ling Long1,2, Xuguang Jiang1,2, Jianhua Yan1,2   

  1. 1 State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China;
    2 Zhejiang University Qingshanhu Energy Research Center, Hangzhou 310027, China;
    3 Hangzhou Xiaoshan Jinjiang Green Energy Co., Ltd., Xiaoshan, Hangzhou 310000, China
  • 收稿日期:2023-04-24 修回日期:2023-11-14 出版日期:2024-03-28 发布日期:2024-06-01
  • 通讯作者: Xuguang Jiang,E-mail address:jiangxg@zju.edu.cn.
  • 基金资助:
    This study was supported by the key program of the National Natural Science Foundation of China (52236008).

Mechanism study of Cu(II) adsorption from acidic wastewater by ultrasonic-modified municipal solid waste incineration fly ash

Shunda lin1,2, Yang Lu1,2, Lin Zheng3, Ling Long1,2, Xuguang Jiang1,2, Jianhua Yan1,2   

  1. 1 State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China;
    2 Zhejiang University Qingshanhu Energy Research Center, Hangzhou 310027, China;
    3 Hangzhou Xiaoshan Jinjiang Green Energy Co., Ltd., Xiaoshan, Hangzhou 310000, China
  • Received:2023-04-24 Revised:2023-11-14 Online:2024-03-28 Published:2024-06-01
  • Contact: Xuguang Jiang,E-mail address:jiangxg@zju.edu.cn.
  • Supported by:
    This study was supported by the key program of the National Natural Science Foundation of China (52236008).

摘要: 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, respectively. 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 (∆H and ∆S > 0, ∆G < 0). Finally, the enhanced adsorption performance of the modified MSWI fly ash for Cu(II) may be attributed to electrostatic interaction and chelation effects.

关键词: Ultrasound, MSWI fly ash, Cu(II), Wastewater, Adsorption

Abstract: 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, respectively. 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 (∆H and ∆S > 0, ∆G < 0). Finally, the enhanced adsorption performance of the modified MSWI fly ash for Cu(II) may be attributed to electrostatic interaction and chelation effects.

Key words: Ultrasound, MSWI fly ash, Cu(II), Wastewater, Adsorption