Adsorption behaviors of typical aromatic pollutants in biologically treated coking wastewater on powdered coal
Hao Sun 1, 2
Yongtian Wang 1, 2  
Yue Bian 1, 2
Xin He 1, 2
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School of Chemical Engineering and Technology, China University of Mining &Technology, Xuzhou221116, Jiangsu, China
Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining &Technology, Xuzhou 221116, Jiangsu, China
Yongtian Wang   

China University of Mining and Technology, No1,Daxue Road,Xuzhou,Jiangsu,P.R.China, 221116 Xuzhou, China
Physicochem. Probl. Miner. Process. 2018;54(2):496–504
The raw coal was utilized as adsorbent based on its remarkable adsorption ability of coal slime to organic compounds in the flotation process. This paper mainly investigates adsorption behaviors of benzpyrole (BZP), pyrrole (PR) and benzoic acid (BA) on powdered coal (PC). In the monocomponent solution, the removal efficiencies of BZP, PR and BA reached 85.23%, 55.02% and 24.84% at PC dosage of 20 g/dm3. Adsorption behaviors of three pollutants fitted perfectly to the pseudo-second order kinetics model and liquid film diffusion occupied the largest proportion in rate-limiting step according to the diffusion rates. Furthermore, the influences of pH on adsorption behaviors and competitive adsorption mechanism of three pollutants were also reported.