Adsorption behavior of EE2 (17 alpha-ethinylestradiol) onto the inactivated sewage sludge: kinetics, thermodynamics and influence factors

Journal of Hazardous Materials
Yujie FengNanqi Ren

Abstract

The adsorption behavior of 17 alpha-ethinylestradiol (EE(2)) onto inactivated sludge was investigated to assess the function of adsorption on EE(2) removal in activated sludge system. The adsorption equilibrium of EE(2) can be achieved in 5.0 h at the research temperature and the adsorption process could be well described by pseudo-second-order model. The equilibrium data at different temperatures were fitted by a linear regression. The thermodynamics analysis revealed that EE(2) adsorption onto inactivated sludge was spontaneous (Delta G=-15.18 to -16.35 kJ/mol), enthalpy-driven (Delta H=-27.2 kJ/mol), entropy-retarded (DeltaS=-39.18 J/(mol K)), and mainly physical adsorption. Effects of pH, ionic strength and coexisting organic matters (methanol and bisphenol A) on EE(2) adsorption onto inactivated sludge were also examined. The amounts of EE(2) equilibrium adsorption ability were unchanged as the pH values increasing from 2.0 to 6.0, but decreased from 2.14 to 1.43 mg/g MLSS when the initial EE(2) concentration was 5.0mg/L as pH above 6.0. The adsorption capacities were first increased from 2.19 to 2.50mg/g MLSS, then sharply decreased and stabilized at 1.12 mg/g MLSS during the ionic strength was adjusted from 0 to 1 mol/L....Continue Reading

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Citations

May 29, 2013·SAR and QSAR in Environmental Research·C Li, L M Colosi
Jan 23, 2014·The Science of the Total Environment·Bahman Banihashemi, Ronald L Droste
Aug 11, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·A E BurgosRochel M Lago
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