Oxidative degradation kinetics and products of chlortetracycline by manganese dioxide

Gao, Chen; Zhao, Ling; Dong, Yuanhua

doi:10.1016/j.jhazmat.2011.07.039

Cited by 89 publications

(53 citation statements)

References 54 publications

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“…2b) increased from 0.000834 to 0.00279 with increasing initial MnO 2 dosage from 20 mg L À1 to 200 mg L À1 (p < 0.05). The positive dependence of oxidative transformation of tetracycline and other pollutants by dosage gradients of Mn dioxides has also been reported in previous studies (Chen et al, 2011a;Lu et al, 2011;Lu and Gan, 2013).…”

Section: Effect Of Mno 2 Dosage On Tc and As(iii) Removalsupporting

confidence: 83%

“…They have strong ability in degradation of antibiotics (e.g., oxytetracycline, sulfamethazine and ciprofloxacin) (Zhang and Huang, 2005;Rubert and Pedersen, 2006;Gao et al, 2012), and oxidation and adsorption of heavy metals including As(III), Cr(III) and Co(II) (Lafferty et al, 2010a;Landrot et al, 2012;Crowther et al, 1983). The decrease of MnO 2 reactivity during oxidation of pollutants was also observed in recent studies (Lafferty et al, 2010a,b;Chen et al, 2011a). For example, Lafferty et al (2010a) showed that As(III) oxidation by MnO 2 was rapid initially but the passivation phenomenon occurred on MnO 2 surface after several hours of reaction.…”

Section: Introductionsupporting

confidence: 56%

“…This implies that high dosage of MnO 2 may alleviate MnO 2 surface passivation phenomenon. Moreover, the inhibitory effect of adsorbed Mn(II) on reactivity of MnO 2 was also reported during the oxidation of other pollutants including chlortetracycline, octylphenol and nonylphenol (Chen et al, 2011a;Lu and Gan, 2013).…”

Section: Effect Of Mno 2 Dosage On Tc and As(iii) Removalmentioning

confidence: 80%

“…Briefly, various proportions of MnO 2 suspension (0-200 mg L À1 ), TC (0-100 lM) and As(III) (0-125 lM) solutions were mixed together for reaction (Table 1). Before addition of TC and/or As(III) solution(s), the MnO 2 suspension was magnetically stirred at 500 rpm for at least 12 h to homogenize MnO 2 (Chen et al, 2011a). Table 1 listed the initial concentrations of MnO 2 , TC and/or As(III) for batch experiments.…”

Section: Batch Experimentsmentioning

confidence: 99%

“…For example, Lafferty et al (2010a) showed that As(III) oxidation by MnO 2 was rapid initially but the passivation phenomenon occurred on MnO 2 surface after several hours of reaction. Additionally, the co-solutes (substituted phenols) can significantly decrease the oxidation rate of chlortetracycline by MnO 2 (Chen et al, 2011a). However, the interactive effects of arsenic and antibiotics on their removal by MnO 2 are poorly understood.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous removal of tetracycline hydrochloride and As(III) using poorly-crystalline manganese dioxide

et al. 2015

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Section: Effect Of Mno 2 Dosage On Tc and As(iii) Removalsupporting

confidence: 83%

Section: Introductionsupporting

confidence: 56%

Section: Effect Of Mno 2 Dosage On Tc and As(iii) Removalmentioning

confidence: 80%

Section: Batch Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simultaneous removal of tetracycline hydrochloride and As(III) using poorly-crystalline manganese dioxide

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Efficient catalytic aerobic oxidation of chlorinated phenols with mixed-valent manganese oxide nanoparticles

Yang

2014

J. Chem. Technol. Biotechnol.

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Dissipation of chlortetracycline in the aquatic environment: Characterization in terms of a generalized multiphase pseudo–zero‐order rate law

Zaranyika

Dzomba

2019

Int J of Chemical Kinetics

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The kinetics of the dissipation of chlortetracycline in the aquatic environment was studied over a period of 90 days using microcosm experiments and distilled water controls. The distilled water control experiments, carried out under dark conditions as well as exposed to natural sunlight, exhibited biphasic linear rates of dissipation. The microcosm experiments exhibited triphasic linear rates of degradation both in the water phase (2.7 × 10−2, 7 × 10−3, 1.3 × 10−3 μg g−1 day–1) and the sediment phase (3.4 × 10−2, 6 × 10−3, 1 × 10−3 μg g−1 day–1). The initial slow rate of dissipation in the dark control (3 × 10−3 μg g−1 day–1) was attributed to a combination of evaporation and hydrolysis, whereas the subsequent fast rate (1.8 × 10−3 μg g−1 day–1) was attributed to a combination of evaporation, hydrolysis, and microbial degradation. For the sunlight‐exposed control, the initial slow rate of dissipation (1.5 × 10−3 μg g−1 day–1) was attributed to a combination of evaporation, hydrolysis, and photolysis, whereas the subsequent fast rate was attributed to a combination of evaporation, hydrolysis, photolysis, and microbial degradation (5.1 × 10−3 μg g−1 day–1). The initial fast rate of dissipation in the water phase of the microcosm experiment is attributed to a combination of evaporation, hydrolysis, photolysis, and microbial degradation, whereas all subsequent slow rates in the water phase and all rates of degradation in the sediment phase are attributed to microbial degradation of the colloidal and sediment particle adsorbed antibiotic. A multiphase zero‐order kinetic model is presented that takes into account (a) dissipation of the antibiotic via evaporation, hydrolysis, photolysis, microbial degradation, and adsorption by colloidal and sediment particles and (b) the dependence of the dissipation rate on the concentration of the antibiotic, type and count of microorganisms, and type and concentration of colloidal particles and sediment particle adsorption sites within a given aquatic environment.

show abstract

Oxidative degradation kinetics and products of chlortetracycline by manganese dioxide

Cited by 89 publications

References 54 publications

Simultaneous removal of tetracycline hydrochloride and As(III) using poorly-crystalline manganese dioxide

Simultaneous removal of tetracycline hydrochloride and As(III) using poorly-crystalline manganese dioxide

Efficient catalytic aerobic oxidation of chlorinated phenols with mixed-valent manganese oxide nanoparticles

Dissipation of chlortetracycline in the aquatic environment: Characterization in terms of a generalized multiphase pseudo–zero‐order rate law

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