SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 60 ›› Issue (8): 46-52.DOI: 10.1016/j.cjche.2023.02.002

Previous Articles     Next Articles

Arsenic removal from acidic industrial wastewater by ultrasonic activated phosphorus pentasulfide

Bo Yu1,2,3, Guang Fu4, Xinpei Li1,2,3, Libo Zhang1,2,3, Jing Li1,2,3, Hongtao Qu4, Dongbin Wang1,2,3, Qingfeng Dong1,2,3, Mengmeng Zhang1,2,3   

  1. 1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
    2. Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China;
    3. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming 650093, China;
    4. Yunnan Chihong Zn & Ge Co., Ltd, Qujing 655011, China
  • Received:2022-10-03 Revised:2023-01-17 Online:2023-10-28 Published:2023-08-28
  • Contact: Jing Li,E-mail:20130010@kust.edu.cn
  • Supported by:
    Thanks for the support of the Basic Research Project of Science and Technology Planning Project of Yunnan Provincial Department of Science and Technology (202201AS070031), Yunnan Pronince Top young talents of The Ten Thousand Project, the central government guides local science and technology development projects (CB22005R006A), the National Key Research and Development Program of China (2019YFC1904204), Kunming Key Laboratory of Special Metallurgy, Kunming Academician Workstation of Advanced Preparation for Super hard Materials Field, Kunming Academician Workstation of Metallurgical Process Intensification.

Arsenic removal from acidic industrial wastewater by ultrasonic activated phosphorus pentasulfide

Bo Yu1,2,3, Guang Fu4, Xinpei Li1,2,3, Libo Zhang1,2,3, Jing Li1,2,3, Hongtao Qu4, Dongbin Wang1,2,3, Qingfeng Dong1,2,3, Mengmeng Zhang1,2,3   

  1. 1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
    2. Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China;
    3. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming 650093, China;
    4. Yunnan Chihong Zn & Ge Co., Ltd, Qujing 655011, China
  • 通讯作者: Jing Li,E-mail:20130010@kust.edu.cn
  • 基金资助:
    Thanks for the support of the Basic Research Project of Science and Technology Planning Project of Yunnan Provincial Department of Science and Technology (202201AS070031), Yunnan Pronince Top young talents of The Ten Thousand Project, the central government guides local science and technology development projects (CB22005R006A), the National Key Research and Development Program of China (2019YFC1904204), Kunming Key Laboratory of Special Metallurgy, Kunming Academician Workstation of Advanced Preparation for Super hard Materials Field, Kunming Academician Workstation of Metallurgical Process Intensification.

Abstract: Arsenic is one of the main harmful elements in industrial wastewater. How to remove arsenic has always been one of the research hotspots in academic circles. In the process of arsenic removal by traditional sulfuration, the use of traditional sulfurizing agent will introduce new metal cations, which will affect the recycling of acid. In this study, phosphorus pentasulfide (P2S5) was used as sulfurizing agent, which hydrolyzed to produce H3PO4 and H2S without introducing new metal cations. The effect of ultrasound on arsenic removal by P2S5 was studied. Under the action of ultrasound, the utilization of P2S5 was improved and the reaction time was shortened. The effects of S/As molar ratio and reaction time on arsenic removal rate were investigated under ultrasonic conditions. Ultrasonic enhanced heat and mass transfer so that the arsenic removal rate of 94.5% could be achieved under the conditions of S/As molar ratio of 2.1:1 and reaction time of 20 min. In the first 60 min, under the same S/As molar ratio and reaction time, the ultrasonic hydrolysis efficiency of P2S5 was higher. This is because P2S5 forms ([(P2S4)])2+ under the ultrasonic action, and the structure is damaged, which is easier to be hydrolyzed. In addition, the precipitation after arsenic removal was characterized and analyzed by X-ray diffraction, scanning electron microscope-energy dispersive spectrometer, X-ray fluorescence spectrometer and X-ray photoelectron spectroscopy. Our research avoids the introduction of metal cations in the arsenic removal process, and shortens the reaction time.

Key words: Arsenic removal, Mass transfer, Precipitation, Waste water, Ultrasound

摘要: Arsenic is one of the main harmful elements in industrial wastewater. How to remove arsenic has always been one of the research hotspots in academic circles. In the process of arsenic removal by traditional sulfuration, the use of traditional sulfurizing agent will introduce new metal cations, which will affect the recycling of acid. In this study, phosphorus pentasulfide (P2S5) was used as sulfurizing agent, which hydrolyzed to produce H3PO4 and H2S without introducing new metal cations. The effect of ultrasound on arsenic removal by P2S5 was studied. Under the action of ultrasound, the utilization of P2S5 was improved and the reaction time was shortened. The effects of S/As molar ratio and reaction time on arsenic removal rate were investigated under ultrasonic conditions. Ultrasonic enhanced heat and mass transfer so that the arsenic removal rate of 94.5% could be achieved under the conditions of S/As molar ratio of 2.1:1 and reaction time of 20 min. In the first 60 min, under the same S/As molar ratio and reaction time, the ultrasonic hydrolysis efficiency of P2S5 was higher. This is because P2S5 forms ([(P2S4)])2+ under the ultrasonic action, and the structure is damaged, which is easier to be hydrolyzed. In addition, the precipitation after arsenic removal was characterized and analyzed by X-ray diffraction, scanning electron microscope-energy dispersive spectrometer, X-ray fluorescence spectrometer and X-ray photoelectron spectroscopy. Our research avoids the introduction of metal cations in the arsenic removal process, and shortens the reaction time.

关键词: Arsenic removal, Mass transfer, Precipitation, Waste water, Ultrasound