PREPARATION OF BIOCHAR BY PYROLYSIS OF PHARMACEUTICAL SLUDGE AND ITS ADSORPTION PERFORMANCE IN TREATING PHARMACEUTICAL WASTEWATER

WU Qin-yue; LIU He; ZHENG Wei; LIU Hong-bo; ZHENG Zhi-yong; ZHANG Yan; ZHANG Cui-cui

doi:10.13205/j.hjgc.202111013

Volume 39 Issue 11

Jan. 2022

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WU Qin-yue, LIU He, ZHENG Wei, LIU Hong-bo, ZHENG Zhi-yong, ZHANG Yan, ZHANG Cui-cui. PREPARATION OF BIOCHAR BY PYROLYSIS OF PHARMACEUTICAL SLUDGE AND ITS ADSORPTION PERFORMANCE IN TREATING PHARMACEUTICAL WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 103-109. doi: 10.13205/j.hjgc.202111013

Citation:

WU Qin-yue, LIU He, ZHENG Wei, LIU Hong-bo, ZHENG Zhi-yong, ZHANG Yan, ZHANG Cui-cui. PREPARATION OF BIOCHAR BY PYROLYSIS OF PHARMACEUTICAL SLUDGE AND ITS ADSORPTION PERFORMANCE IN TREATING PHARMACEUTICAL WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 103-109. doi: 10.13205/j.hjgc.202111013

Citation:

WU Qin-yue, LIU He, ZHENG Wei, LIU Hong-bo, ZHENG Zhi-yong, ZHANG Yan, ZHANG Cui-cui. PREPARATION OF BIOCHAR BY PYROLYSIS OF PHARMACEUTICAL SLUDGE AND ITS ADSORPTION PERFORMANCE IN TREATING PHARMACEUTICAL WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 103-109. doi: 10.13205/j.hjgc.202111013

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PREPARATION OF BIOCHAR BY PYROLYSIS OF PHARMACEUTICAL SLUDGE AND ITS ADSORPTION PERFORMANCE IN TREATING PHARMACEUTICAL WASTEWATER

doi: 10.13205/j.hjgc.202111013

1. Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;
2. Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou 215011, China;
3. Department of Environmental Technology and Ecology, Yangtze Delta Region Institute of Tsinghua University Zhejiang, Jiaxing 314006, China;
4. Envirtecs Water and Wastewater Technology Company, Jiaxing 314000, China

Received Date: 2021-07-15
Available Online: 2022-01-26

Abstract

Abstract

This study adopted pyrolysis to prepare biochar from pharmaceutical sludge, investigated the influence of ZnCl₂ activation conditions on the adsorption performance of biochar, and explored its performance in pharmaceutical wastewater treatment. Increasing the concentration and impregnation ratio of ZnCl₂ activator improved the adsorption performance of pharmaceutical sludge biochar. The specific surface area of biochar reached 534.91 m²/g, and iodine value and phenol adsorption value reached 674.61 mg/g and 119.12 mg/g, respectively, under ZnCl₂ concentration of 5 mol/L and impregnation ratio of 1:1. The adsorption kinetics of COD in pharmaceutical wastewater by the pharmaceutical sludge biochar was more consistent with the Elovich model and the pseudo-second order model. The rapid adsorption of COD by the biochar occurred within 1 h. The increase in the dosage of biochar improved the removal of pollutants in wastewater. COD removal and AOX removal achieved 66.3% and 61.8%, respectively, by adsorption at 50 g/L biochar dosage for 1 h. The multi-stage adsorption could achieve better pollutant removal effect at a lower dosage, as the 6-stage adsorption at a biochar dosage of 1 g/L removed 72.8% of COD and 65.2% of AOX. The study revealed that pyrolysis of pharmaceutical sludge with ZnCl₂ activation could produce high quality biochar, which possessed excellent potential in pharmaceutical wastewater adsorption treatment.
- biochar,
- pharmaceutical sludge,
- pharmaceutical wastewater,
- adsorption,
- AOX

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References(26)

References

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