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2014, Volume 8, Issue 3

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Frontiers of Environmental Science & Engineering >> 2014, Volume 8, Issue 3 doi: 10.1007/s11783-013-0567-3

Removal of 17β-estradiol in laccase catalyzed treatment processes

Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing 210095, China.Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of PRC, Nanjing 210042, China.Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223, USA

Available online: 2014-05-19
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Abstract

The removal of 17β-estradiol (E2) in laccase catalyzed oxidative coupling processes was systematically studied in this work. We focused on the influence of pH and natural organic matter (NOM) on the performance of the enzymatic treatment processes. It was found that the optimal pH for E2 removal was between 4 and 6. The removal of E2 was slightly inhibited in the presence of NOM. Enzymatic transformation of E2 was second-order in kinetics with first-order to both the concentrations of the enzyme and contaminant. Mass spectrum (MS) analysis suggested that coupling products were formed through radical-radical coupling mechanism. The results of this study demonstrated that laccase catalyzed oxidative coupling process could potentially serve as a treatment strategy to control steroid estrogens.

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