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Open AccessArticle

Adsorptive Removal of Pyridine in Simulation Wastewater Using Coke Powder

National Engineering Research Center of Coal Preparation and Purification, Xuzhou 221116, China
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
Authors to whom correspondence should be addressed.
Processes 2019, 7(7), 459;
Received: 17 June 2019 / Revised: 15 July 2019 / Accepted: 16 July 2019 / Published: 18 July 2019
(This article belongs to the Special Issue Wastewater Treatment Processes)
PDF [4658 KB, uploaded 18 July 2019]


Pyridine is a toxic component in industrial wastewater, which is difficult to remove using conventional methods. In this study, the cost-effective coke powder was used to remove pyridine from a pyridine simulation wastewater. The removal efficiency and adsorption capacity of pyridine reached up to 67.32% and 0.4488 mg/g, respectively, at a coke powder concentration of 60 mg/L and an adsorption time of 30 min. The pyridine removal efficiency and adsorption capacity of coke powder reached saturation when the initial concentration was 40 mg/L. The pH of 2–12 in the solution was found to have little effect on the pyridine adsorption process of coke powder, while the coke powder with lower ash content was of better adsorbability for pyridine. The coke powder was regenerated by heat treatment, and reused for pyridine adsorption. It was found that the pyridine removal efficiency slightly decreased after nine times of reuse, in addition to a small cumulative weight loss rate of coke powder. Adsorption isotherm analysis showed that the adsorption of pyridine by coke powder could be well described by the Freundlich isothermal adsorption model, indicating multi-molecular layers mainly dominated the adsorption of pyridine on the surface of coke powder. View Full-Text
Keywords: adsorbent; adsorption thermodynamics; coke powder; pyridine adsorbent; adsorption thermodynamics; coke powder; pyridine

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Gao, Q.; Wang, L.; Li, Z.; Xie, Y.; He, Q.; Wang, Y. Adsorptive Removal of Pyridine in Simulation Wastewater Using Coke Powder. Processes 2019, 7, 459.

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