Electrochemical, Photochemical, and Photoelectrochemical Treatment of Sodiump-Cumenesulfonate.
The degradation of sodiump-cumenesulfonate (SCS) by electrochemical, photochemical, and photoelectrochemical methods in aqueous solution of NaClO4, NaCl, and NaClO has been studied. It was found that as a result of NaClO4electroreduction and photodecomposition, the ions Cl-and ClO3-are formed. These ions undergo transformations into radicals, mainly Cl•, Cl2•-, ClO•-, ClO2•-, and ClO3•-, due to electrochemical and photochemical reactions. It was shown that the interpretation of results of the studies over mineralization processes carried out in the presence of ClO4-cannot be adequate without taking into consideration the reduction of ClO4-to Cl-and ClO3-. Therefore, previous works presented in the literature should be rediscussed on the basis of the new data. Photoelectrochemical mineralization of substrate in NaCl solution at the concentration of 16 mmol L-1is comparable with the efficiency of the reaction in NaClO4solution containing more than 8 mmol L-1of NaClO. Total SCS mineralization was obtained in the photoelectrochemical reactor with a UV immersion lamp with a power 15 W in the period of 135 min and current intensity of 350 mA. In such conditions, the power consumption was about 1.2 kWh per g of TOC removed.
Lodz University of Technology, Department of General and Ecological Chemistry, Zeromskiego 116, 90-924 Lodz, Poland.
Lidia
L
Osiewała
Adam
A
Socha
Aleksandra
A
Perek
Marek
M
Socha
Jacek
J
Rynkowski
Cyclic voltammetry; NaClO4 decomposition; Photoelectrochemical process; Sodium p-cumenesulfonate