Adsorption and transformation of tetracycline antibiotics with aluminum oxide

Chen, Wan Ru; Huang, Ching-Hua

doi:10.1016/j.chemosphere.2010.03.020

Cited by 230 publications

(105 citation statements)

References 37 publications

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“…They are used extensively for disease control and in livestock feed for several decades due to their great therapeutic values (Chen and Huang 2010;Sarmah et al 2006). It was estimated that 12.6 thousand metric tons of antibiotics were sold in the United States for animal use in 2007.…”

Section: Introductionmentioning

confidence: 99%

Tetracycline adsorption on kaolinite: pH, metal cations and humic acid effects

et al. 2011

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Contamination of environmental matrixes by human and animal wastes containing antibiotics is a growing health concern. Because tetracycline is one of the most widely-used antibiotics in the world, it is important to understand the factors that influence its mobility in soils. This study investigated the effects of pH, background electrolyte cations (Li(+), Na(+), K(+), Ca(2+) and Mg(2+)), heavy metal Cu(2+) and humic acid (HA) on tetracycline adsorption onto kaolinite. Results showed that tetracycline was greatly adsorbed by kaolinite over pH 3-6, then decreased with the increase of pH, indicating that tetracycline adsorption mainly through ion exchange of cations species and complexation of zwitterions species. In the presence of five types of cations (Li(+), Na(+), K(+), Ca(2+) and Mg(2+)), tetracycline adsorption decreased in accordance with the increasing of atomic radius and valence of metal cations, which suggested that outer-sphere complexes formed between tetracycline and kaolinite, and the existence of competitor ions lead to the decreasing adsorption. The presence of Cu(2+) greatly enhanced the adsorption probably by acting as a bridge ion between tetracycline species and the edge sites of kaolinite. HA also showed a major effect on the adsorption: at pH < 6, the presence of HA increased the adsorption, while the addition of HA showed little effect on tetracycline adsorption at higher pH. The soil environmental conditions, like pH, metal cations and soil organic matter, strongly influence the adsorption behavior of tetracycline onto kaolinite and need to be considered when assessing the environmental toxicity of tetracycline.

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Section: Introductionmentioning

confidence: 99%

Tetracycline adsorption on kaolinite: pH, metal cations and humic acid effects

et al. 2011

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“…against TC, TC-Cu complexes in aqueous phase, and to the increased positive surface charge of soil by Cu(II) adsorption . Adsorption of TC on Al 2 O 3 was involved in formation of complexes (Chen and Huang 2010). Meanwhile, coating of hydrous Al oxide (HAO) with soil humic acid significantly suppressed TC adsorption, attributable to altered HAO surface charge characteristics and/or direct competition between Elliott soil humic acid and TC for potential sorption sites (Gu and Karthikeyan 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Many functional groups, such as deprotonated -COO-in organic matter, offer the possibility of adsorption sites for antibiotics (Sibley and Pedersen 2008). Hydrogen bonding between antibiotics and the polar functional groups of organic matter could contribute further to antibiotic adsorption (Chen and Huang 2010). At low concentrations, co-adsorption of dissolved organic matter (DOM) could promote further adsorption of antibiotics on montmorillonite (Kulshrestha et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Desorption of tetracycline from montmorillonite by aluminum, calcium, and sodium: an indication of intercalation stability

Chang

Jean

et al. 2013

Int. J. Environ. Sci. Technol.

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As the uptake of cationic drugs, such as tetracycline (TC), was attributed to cation exchange, the stability of adsorbed TC on a Ca-montmorillonite SAz-2 was studied using cationic solutions of different valence charges under different pH conditions. At the initial loading of 356 mg g -1 , the amounts of TC desorbed by 0.05 M AlCl 3 , CaCl 2 , and NaCl were 133 ± 4, 83 ± 6, and 50 ± 4 mg g -1 , respectively, or 37, 23, and 14 %. However, when the amount or percentage of TC desorbed was normalized to the equivalence of each cation, the values were in the range of 44-50 mg g -1 or 11-14 % per 10 mmol of charge. The kinetics of TC desorption were moderately fast and almost reached equilibrium in 6 h. The results followed the pseudo-second-order kinetic model with reaction rate in the order of AlCl 3 [ CaCl 2 [ NaCl at a higher initial TC loading level. The total amount of TC desorbed after five desorption cycles followed the order of AlCl 3 [ CaCl 2 [ NaCl, too, suggesting that cations with higher positive charges, thus, less hydrated, are preferred to remove adsorbed cationic drugs. The FTIR analyses showed larger band shift when Al 3? was used as the desorbing reagent. The XRD patterns before and after TC desorption revealed no changes in basal spacing, even after five desorption cycles, suggesting that the removal of TC from SAz-2 was largely from the external surfaces.

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“…Among these available methods, adsorption is a widely used effective technology for the treatment of low concentration antibiotics. Recently, adsorption of tetracycline on sorbents based on metal or metal oxides such as montmorillonite [15], hydrous oxides of aluminum and iron [16,17] were reported.…”

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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Adsorption and transformation of tetracycline antibiotics with aluminum oxide

Cited by 230 publications

References 37 publications

Tetracycline adsorption on kaolinite: pH, metal cations and humic acid effects

Tetracycline adsorption on kaolinite: pH, metal cations and humic acid effects

Desorption of tetracycline from montmorillonite by aluminum, calcium, and sodium: an indication of intercalation stability

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

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