Tetracycline degradation by ozonation in the aqueous phase: Proposed degradation intermediates and pathway

Khan, Muhummadh; Bae, Hyun-Joo; Jung, Jin‐Young

doi:10.1016/j.jhazmat.2010.05.063

Cited by 319 publications

(82 citation statements)

References 26 publications

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“…Similar pattern is observed for ERY, where the problematic associated to the discharged amounts into the environment from WWTPs is still present at ng L À1 (Gros et al, 2012). Another problem is associated to the presence of these compounds into the media since it can induce the development of the so called ''environmental antibiotic-resistant pathogens'' (Hirsch et al, 1999;Bautitz and Nogueira, 2007;Alighardashi et al, 2009;Khan et al, 2010;Huerta et al, 2013). The development of this resistance to antibiotics could cause problems at environmental levels (maybe affecting biota and, finally, human health) although this information is scarce and contradictory (Rizzo et al, 2013).…”

Section: Introductionsupporting

confidence: 58%

Identification of new transformation products during enzymatic treatment of tetracycline and erythromycin antibiotics at laboratory scale by an on-line turbulent flow liquid-chromatography coupled to a high resolution mass spectrometer LTQ-Orbitrap

et al. 2015

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33In the case of Tc, the tentative molecular formulas with errors mass within 2 ppm have been 34 based on the hypothesis of dehydroxylation, (bi)demethylation and oxidation of the rings A and 35C as major reactions. In contrast, the major TP detected for ERY has been identified as the 36 "dehydration ERY-A", with the same molecular formula of its parent compound. In addition, the 37 evaluation of the antibiotic activity of the samples along the enzymatic treatments showed a 38 decrease around 100% in both cases.

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Section: Introductionsupporting

confidence: 58%

Identification of new transformation products during enzymatic treatment of tetracycline and erythromycin antibiotics at laboratory scale by an on-line turbulent flow liquid-chromatography coupled to a high resolution mass spectrometer LTQ-Orbitrap

et al. 2015

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“…Therefore, the development of new efficient approaches is required to decrease the TC antibiotic discharge into the environment. In general, advanced oxidation processes (AOPs) are the most efficient technology for degradation of various refractory pollutants in aqueous solutions and, during the last few decades, have been widely applied for removal of many organic pollutants such as ozonation (Khan et al 2010), Fenton (Zgajnar Gotvajn et al 2013), photo-Fenton (Liu et al 2012), ultrasound waves (Mahvi 2009;Mahvi et al 2009), sonochemical (Ifelebuegu et al 2014), photosonochemical processes (Mahvi and Maleki 2010;Hoseini et al 2013b), ultraviolet irradiation (Dobaradaran et al 2010), and sulfate radical-based oxidation (Tay et al 2013;Lin et al 2014;Deng et al 2014). In recent years, AOPs have been demonstrated to be an effective technology for the removal of pharmaceuticals, including TC antibiotics (Maroga et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of tetracycline using nanosized titanium dioxide in aqueous solution

Safari

Hoseini

Seyedsalehi

et al. 2014

Int. J. Environ. Sci. Technol.

250

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The aim of the study was to investigate the degradation kinetics of tetracycline antibiotic by nanosized titanium dioxide under ultraviolet irradiation. Enhancement of photocatalysis by addition of Hydrogen peroxide was also evaluated. Various experimental parameters such as initial tetracycline concentrations, initial titanium dioxide concentration, initial pH, reaction times, initial Hydrogen peroxide concentrations, as well as water matrix using ultrapure water, drinking water and secondary effluent were investigated. The initial rate of photocatalytic degradation of tetracycline well fitted the Langmuir-Hinshelwood kinetic model (R 2 = 0.9926) with a reaction rate constant of 1.4 mg/L min. The degradation rate depended on initial tetracycline concentration and initial pH. The degradation rate also increased with higher titanium dioxide density and reached a plateau at titanium dioxide concentration of 1.0 g/L. The tetracycline degradation rate was higher in drinking water compared to ultrapure water. The addition of Hydrogen peroxide to titanium dioxide suspension significantly enhanced the tetracycline degradation rate and substantially reduced the time required to degrade 100 % of tetracycline. Changes of chemical oxygen demand values during photolysis indicated that tetracycline transformed into intermediate products without complete mineralization. The ultraviolet visible spectra obtained before and after ultraviolet irradiation in the presence of titanium dioxide can indicate the formation of 4a,12a-anhydro-4-oxo-4-dimethylaminotetracycline.

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“…Various techniques such as ozonation [10], photo-Fenton process [11], photo electrocatalytic degradation [12], ion exchange [13] and adsorption [14] have been employed for the removal of tetracycline from water. Among these available methods, adsorption is a widely used effective technology for the treatment of low concentration antibiotics.…”

Section: Introductionmentioning

confidence: 99%

Removal of tetracycline by electrocoagulation: Kinetic and isotherm modeling through adsorption

Ouaissa

Chabani

Amrane

et al. 2014

Journal of Environmental Chemical Engineering

108

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The use of antibiotics and growth hormones in human and veterinary medicine has a significant effect on the quality of surface and groundwater. The relevance of an electrocoagulation (EC) process for the removal of an antibiotic selected because of its wide application, high solubility in water, high residual toxicity and an absence of biodegradability, was examined in this study.Metal hydroxides generated during EC were used to remove tetracycline (TC) from aqueous solution. The knowledge regarding the removal mechanism of this substance has not been investigated up to now. Experiments were carried out in a batch electrochemical reactor using aluminum electrodes. The removal of TC was relatively fast and equilibrium was reached within 15 min. The effects of the main operating parameters were examined and showed that irrespective of the initial concentration and for pH ranging from 3 to 10, maximum removal efficiency remained close to 99%; while a sharp decrease was recorded at pH 2 (10 % removal).The results of this study also showed that the removal of TC from water was strongly affected by the current intensity. The mechanism of electrocoagulation was modeled using isotherm models and showed that the Sips isotherm matched satisfactorily experimental data, suggesting monolayer coverage of adsorbed molecules and assumed a quasi-Gaussian distribution energy owing to the high correlation also found for the Toth model. In addition, adsorption kinetic studies showed that the EC process followed a pseudo-second-order kinetic model at the various current densities, pH and initial antibiotic concentrations considered.

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Tetracycline degradation by ozonation in the aqueous phase: Proposed degradation intermediates and pathway

Cited by 319 publications

References 26 publications

Identification of new transformation products during enzymatic treatment of tetracycline and erythromycin antibiotics at laboratory scale by an on-line turbulent flow liquid-chromatography coupled to a high resolution mass spectrometer LTQ-Orbitrap

Identification of new transformation products during enzymatic treatment of tetracycline and erythromycin antibiotics at laboratory scale by an on-line turbulent flow liquid-chromatography coupled to a high resolution mass spectrometer LTQ-Orbitrap

Photocatalytic degradation of tetracycline using nanosized titanium dioxide in aqueous solution

Removal of tetracycline by electrocoagulation: Kinetic and isotherm modeling through adsorption

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