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Treatment of Butyl Xanthate Wastewater with Chalcopyrite Activated Persulfate
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Xiaofei WEN, Meirong WU, Yipeng ZHAI, Runqing LIU
Mining and Metallurgical Engineering | 2023, 43(3) : 61 - 66
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Mining and Metallurgical Engineering | 2023, 43(3): 61-66
• MINERAL PROCESSING •
Treatment of Butyl Xanthate Wastewater with Chalcopyrite Activated Persulfate
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Xiaofei WEN, Meirong WU, Yipeng ZHAI, Runqing LIU
Affiliations
  • School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China
Published: 2023-06-01 doi: 10.3969/j.issn.0253-6099.2023.03.014
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Natural chalcopyrite (CuFeS2) was used as a catalyst to activate persulfate (PS) for butyl xanthate wastewater treatment. The influences of CuFeS2 dosage, PS dosage and initial pH of solution on the removal rate of butyl xanthate in CuFeS2/PS system were investigated, and the recyclability of CuFeS2 was also evaluated. The results show that CuFeS2 can significantly activate PS. After 10 min reaction with initial pH of 3, CuFeS2 dosage of 4 g/L and PS dosage of 5 mmol/L, the removal rate of butyl xanthate reached 99.23%, while the removal rate of total organic carbon (TOC) was only 31.29%. After the reaction time was extended to 60 min, the TOC removal rate reached 68.31%, and CuFeS2 still sustained good catalytic activity after being recycled for five times. The UV-Visible absorption spectra of butyl xanthate wastewater degradation showed that butyl xanthate was initially oxidized to alcohols, then decomposed and mineralized to carbon dioxide and water. X-ray diffraction and fourier transform infra-red spectroscopy analysis showed that CuFeS2 reacted with PS without surface passivation, thus could be reused. A free radical quenching test and an electron spin resonance analysis showed that the removal mechanism of xanthate included free radical degradation and CuFeS2 physisorption, in which sulfate radical (SO4-·) and hydroxyl radical (HO·) were the main active substances to promote xanthate degradation, and the SO4-· played a dominant role.

chalcopyrite  /  persulfate  /  butyl xanthate  /  activation  /  free radical  /  adsorption  /  wastewater treatment
Xiaofei WEN, Meirong WU, Yipeng ZHAI, Runqing LIU. Treatment of Butyl Xanthate Wastewater with Chalcopyrite Activated Persulfate[J]. Mining and Metallurgical Engineering, 2023 , 43 (3) : 61 -66 . DOI: 10.3969/j.issn.0253-6099.2023.03.014
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Year 2023 volume 43 Issue 3
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doi: 10.3969/j.issn.0253-6099.2023.03.014
  • Receive Date：2022-12-12
  • Online Date：2026-03-05
  • Published：2023-06-01
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  • Received：2022-12-12
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    School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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