Behavior of two differently radiolabelled 17α-ethinylestradiols continuously applied to a laboratory-scale membrane bioreactor with adapted industrial activated sludge

Cirja, Magdalena; Zuehlke, Sebastian; Ivashechkin, Pavel; Hollender, Juliane; Schäffer, Andreas; Corvini, Philippe F.-X.

doi:10.1016/j.watres.2007.06.022

Cited by 30 publications

(7 citation statements)

References 36 publications

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“…Therefore, adsorption is the only main removal mechanism of EE 2 in STPs. Previous studies also confirmed that EE 2 was strongly adsorbed onto the activated sludge particles in municipal wastewater treatment plants (Andersen et al 2005;Cirja et al 2007). Ren et al (2007) investigated the thermodynamics of EE 2 adsorption onto activated sludge biomass and determined that EE 2 adsorption was an exothermic process.…”

supporting

confidence: 53%

Comparing the adsorption and desorption characteristics of 17α-ethinylestradiol on sludge derived from different treatment units

Zhang

Feng

Gao

et al. 2012

Int. J. Environ. Sci. Technol.

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The adsorption and desorption behaviors of 17a-ethinylestradiol on various sludges derived from different treatment units of a sewage treatment plant were investigated using batch equilibration experiments. The results showed that adsorption process could be well described by pseudo-second-order kinetic model and fast adsorption played a main role. Adsorption ability varied as the order of aerobic sludge & anoxic sludge & primary sludge [ sludge cake [ anaerobic sludge. Adsorption/ desorption isotherms were well fitted by the modified Freundlich model, and K 0 f values increased with the organic matter content. Thermodynamic analysis indicated that 17a-ethinylestradiol adsorption/desorption was exothermic and conducted spontaneously. After heat treatment for removing the organic carbon, K 0 f values decreased by more than 78%, but organic carbon normalized adsorption constant was 7.76-29.51 mg/g. The 17a-ethinylestradiol adsorption capacity was found to decrease from 0.95-1.39 to 0.44-0.49 mg/g with sludge concentration increasing from 500 to 4,000 mg/L, being almost unchanged at pH 3-10 and sharply decreasing with pH [ 10. The adsorption capacity was also found to fluctuate in the range of 2.0-3.0 mg/g when Ca 2? concentration was \0.5 mol/L and increased rapidly above 0.5 mol/L. Addition of methanol and acetonitrile could improve 17a-ethinylestradiol desorption effect, which increased with the content of organic solvents, and the desorption degree of acetonitrile was higher than methanol.

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supporting

confidence: 53%

Comparing the adsorption and desorption characteristics of 17α-ethinylestradiol on sludge derived from different treatment units

Zhang

Feng

Gao

et al. 2012

Int. J. Environ. Sci. Technol.

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“…In the current study, we observed a high degree of removal of EE2 confirming results from our complementary work (Khunjar In Preparation b) but contrasting with results from prior researchers (Cirja 2007). To explain the differences, we propose that the lower rbCOD concentration in the effluent of the reactors in our work (10-20 mg sCOD/L), as compared to that reported by Cirja et al (37.5 mg sCOD/L), selected for organisms that were physiologically adapted to simultaneous utilize EE2 and residual organics.…”

Section: Short Term Experiments Confirm That Heterotrophs Can Oxidizecontrasting

confidence: 69%

The Impact of Physiological State and Residual Organic Carbon on the Biotransformation of 17α-ethinylestradiol by Heterotrophic Bacteria

Khunjar¹,

Love²,

Aga³

et al. 2009

proc water environ fed

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Experiments were performed to investigate the fate of 17-ethinylestradiol (EE2) in the presence of continuous flow cultivated heterotrophs. Results indicate that physiological state and residual organic matter affected the biodegradation of EE2 by heterotrophs. As such, mineralization of EE2 and metabolites generated by ammonia oxidizing bacteria is ultimately governed by heterotrophic activity.

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“…12 Among these approaches, adsorption is a proven technology used widely in water treatment facilities for water detoxication and purication because of its high efficiency, simple operation conditions, the fact that it does not generate harmful byproducts, and its cost effective. 13 Moreover, EE2 is a kind of nonpolar and hydrophobic compound which is difficult to dissolve in polar water solution, therefore, it can be strongly adsorbed onto solid particles in wastewater treatment. 13,14 Fe oxide is the most abundant metal oxide found in soils and sediments and has been widely used as adsorbents to remove contaminants from water for their relatively high specic area and charge.…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of 17α-ethinylestradiol (EE2) from water using freshly formed Fe–Mn binary oxide

Jiang

Guo

et al. 2017

RSC Adv.

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Behavior of two differently radiolabelled 17α-ethinylestradiols continuously applied to a laboratory-scale membrane bioreactor with adapted industrial activated sludge

Cited by 30 publications

References 36 publications

Comparing the adsorption and desorption characteristics of 17α-ethinylestradiol on sludge derived from different treatment units

Comparing the adsorption and desorption characteristics of 17α-ethinylestradiol on sludge derived from different treatment units

The Impact of Physiological State and Residual Organic Carbon on the Biotransformation of 17α-ethinylestradiol by Heterotrophic Bacteria

Efficient removal of 17α-ethinylestradiol (EE2) from water using freshly formed Fe–Mn binary oxide

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