Open AccessElectrochemical degradation of chemical wastewater by anodic oxidation process
Author(s) -
Kenny Q. Zhu,
Hua Zhu,
Shangti Feng,
Jianying Fu,
Debao Guo,
Qing Sun,
Lihua Huang,
Xiaodong Hao
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/371/3/032018
Subject(s) - anode , wastewater , electrochemistry , electrolyte , degradation (telecommunications) , pollutant , materials science , supporting electrolyte , oxide , organic matter , chemistry , chemical engineering , environmental chemistry , inorganic chemistry , electrode , metallurgy , environmental engineering , environmental science , organic chemistry , telecommunications , computer science , engineering
The wastewaters produced in chemical production contain large numbers of persistent organic pollutants, posing potential adverse impacts to aquatic ecosystem and human health. In this work, the electrochemical degradation of organic pollutants in chemical wastewater belonging to Sunny wealth chemicals (Linyi, Shandong Province) was conducted using anodic oxidation process. Three commercially available anodes (Pt, boron-doped diamond (BDD) and Ti-Ru-Sn ternary oxide (Ti/RuO 2 -SnO 2 )) were chosen to investigate the effect of several primary operating parameters, such as electrolyte composition, electrolyte concentration and applied current density. Total organic carbon (TOC) was detected as reference parameters to assess the performance of anodic oxidation. The experimental results show that BDD anode exhibited excellent oxidation capacity for degradation of organics in chemical wastewater, achieving over 30% removal efficiency in all cases within 4 h. TOC removal efficiency of 52% was obtained with BDD anode in 4 h of reaction time at applied current density 30 mA cm -2 , NaCl concentration 0.05 mol L -1 ; nevertheless, less than 45 % of removal was achieved with Pt and Ti/RuO 2 -SnO 2 anode under the same conditions.