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Advanced Decomposition of Coking Wastewater in Relation to Total Organic Carbon Using an Electrochemical System
Hao Wang1, Bingxu Quan1, Xiaoqing An1, Yang Yang1, Can Tian1,2
 
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1College of Civil and Architectural Engineering, North China University of Science and Technology,
Tangshan, 063009, P.R. China
2Drainage Engineering Technology Research Center of Tangshan City,
Tangshan, 063009, P.R. China
Online publish date: 2017-03-22
Publish date: 2017-03-22
Submission date: 2016-08-04
Final revision date: 2016-09-25
Acceptance date: 2016-09-26
 
Pol. J. Environ. Stud. 2017;26(2):941–947
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ABSTRACT
This research included experiments on the advanced treatment of coking wastewater by electrochemical reactor. The results showed that a favorable operating condition could be obtained through the electrochemical course, when electrolysis time was 60 min, current density was 8 A, and electrode span was 1 cm. Under this condition, total organic carbon (TOC) removal efficiency could reach 73%, and the removal mechanism had also been analyzed. In addition, the electrodes’ morphology characteristics and components were analyzed through a scanning electron microscope, and the results showed that on the surface of anode and cathode electrodes there were quite a few cracks, the amount of which increased after use. Meanwhile, the content of chemical elements on the electrodes’ surface changed obviously after use – especially Ti content (from 39.66% to 92.69%) on the anode and Fe content (from 72.57% to 53.66%) on the cathode. The result was probably caused by the redox reaction, namely the shedding of the coating on the anode electrode’s surface, and reactions around the cathode electrode’s surface.
eISSN:2083-5906
ISSN:1230-1485