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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 6    December 2006

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Treatment of naphthalene derivatives with iron-carbon micro-electrolysis
WANG Yu-ping(王玉萍)1, 2, WANG Lian-jun(王连军)1
PENG Pan-ying(彭盘英)2, LU Tian-hong(陆天虹)2

1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; 
2. School of Chemistry and Environmental Science, Nanjing Normal University, 
Nanjing 210097, China

Abstract: The degradation of five naphthalene derivatives in the simulated wastewater was investigated using the iron-carbon micro-electrolysis method. The optimal initial pH of solution and adsorption of iron-carbon and removal efficiency of the total organic carbon(TOC) were investigated. The results show that the removal efficiency of the naphthalene derivatives can reach 48.9%−92.6% and the removal efficiency of TOC is 42.8%−78.0% for the simulated wastewater with 200 mg/L naphthalene derivatives at optimal pH of 2.0−2.5 after 120 min treatment. The degradation of five naphthalene derivatives with the micro-electrolysis shows the apparent first-order kinetics and the order of removal efficiency of the naphthalene derivatives is sodium 2-naphthalenesulfonate, 2-naphthol, 2, 7-dihydroxynaphthalene, 1-naphthamine, 1-naphthol-8-sulfonic acid in turn. It is illustrated that the substituents of the naphthalene ring can affect the removal efficiency of naphthalene due to their electron-withdrawing or electron-donating ability.

 

Key words: cast iron scrap; micro-electrolysis; naphthalene; substituent; wastewater treatment

ISSN 1672-7029
CN 43-1423/U

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