Sorptive removal of tetracycline from water by palygorskite

Chang, Po Hsiang; Li, Zhaohui; Yu, Tong Lei; Munkhbayer, Sandagdori; Kuo, Tzu Hsing; Hung, Yu Chiao; Jean, Jiin-Shuh; Lin, Kuo‐Hung

doi:10.1016/j.jhazmat.2008.09.113

Cited by 247 publications

(76 citation statements)

References 36 publications

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“…The negative DG values indicate attractive interaction between TC and birnessite surfaces, and the magnitude of DG values suggested physical sorption such as cation exchange. These values are larger than -8 kJ/mol for TC sorption on silica (Turku et al 2007), but slightly smaller than TC sorption on palygorskite (Chang et al 2009b). The small positive DS values indicate that the sorption of TC on birnessite is spontaneous due to an increase in system randomness.…”

Section: Influence Of Temperature On Tc Removal By Birnessitementioning

confidence: 75%

Sorption and desorption of tetracycline on layered manganese dioxide birnessite

Jiang

Chang

Wang

et al. 2014

Int. J. Environ. Sci. Technol.

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Birnessite is one of the most common manganese oxides in the clay-sized fraction (\2 lm) of soils and has high cation exchange capacity and larger surface area. Birnessite was previously studied for decomposition of selected antibiotics from water. In this study, the removal of tetracycline (TC) by birnessite from aqueous solution was investigated as a function of initial tetracycline concentration, solution pH, temperature, and equilibrium time. Changes in solid phase after TC adsorption and desorption were characterized by X-ray photoelectron spectroscopy, X-ray diffraction (XRD), and Fourier transform infrared analyses. Desorption of exchangeable cations accompanying TC removal and partial desorption of TC from birnessite by AlCl 3 confirmed that cation exchange was responsible for TC removal at low initial concentrations. Both the external and internal surface areas were readily available for TC uptake by birnessite. The intercalated TC formed a horizontal monolayer configuration in the interlayer of birnessite as deduced from XRD analyses.

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Section: Influence Of Temperature On Tc Removal By Birnessitementioning

confidence: 75%

Sorption and desorption of tetracycline on layered manganese dioxide birnessite

Jiang

Chang

Wang

et al. 2014

Int. J. Environ. Sci. Technol.

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“…91.12% of TC adsorption on activated carbon (i.e. 483.09 mmol kg À1 of final adsorption) could be obtained within 2 h, which was much faster than TC sorption on rectorite [32] and palygorskite [10]. The fast sorption of TC onto the composite was due to the smaller particle size (about 75 mm) of the adsorbent, which was favorable for the diffusion of TC molecules from solution onto the active sites of the adsorbent.…”

Section: Tc Sorption Kineticsmentioning

confidence: 95%

“…Various sorbents including natural minerals and synthetic materials such as palygorskite [10], carbon nanotubes [7], montmorillonite, kaolinite [11,12], iron oxides, silica, iron/ aluminum hydroxides [13e15] have been employed to remove undesirable TCs from the water. Besides, powdered activated carbon with the properties of high surface area, porous structure and special surface reactivity [16], offers an attractive and inexpensive option for the removal of TCs from water.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis, characterization of a MnFe2O4/activated carbon magnetic composite and its effectiveness in tetracycline removal

Shao

Ren

Zhang

et al. 2012

Materials Chemistry and Physics

182

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a b s t r a c tIn this study, MnFe 2 O 4 /activated carbon magnetic composites with mass ratio of 1:1, 1:1.5 and 1:2 were synthesized using a simple chemical coprecipitation procedure. A variety of techniques such as X-ray diffractometer, scanning electron microscope, magnetization measurements, BET surface area measurements were used to characterize the structure, morphology and magnetic performance of the prepared composite adsorbents. The results showed that the composites had good magnetic properties, which allowed their convenient magnetic separation from water. Spinel manganese ferrite was found to occur in the magnetic phase and the presence of magnetic particles of MnFe 2 O 4 did not significantly affect the surface area and pore structure of the activated carbon. The magnetic composites were effective for tetracycline (TC) removal from water and the maximal adsorption capacity was 590.5 mmol kg À1 at pH 5.0. The TC adsorption followed pseudo-second-order kinetic model and its removal decreases gradually with an increase in pH value, whereas the removal rate was over 60% even at pH 9.0. The TC adsorption process is endothermic and the increase of temperature is favoring its removal. All these results indicated that the prepared composites had the potential to be used as adsorbents for the removal of TC from water or wastewater.

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“…Additional studies investigated various strategies for efficient removal and transformation of pharmaceuticals using advanced treatment employing processes of chemical [32,[40][41][42][43], biological [44][45][46][47] and physical nature [48,49]. Since not all pharmaceuticals present in sewage are the result of intentional intake, metabolism and excretion, some researchers have investigated the composition of wastewaters from the pharmaceutical industry [50], and healthcare facilities [51], as well as the importance of disposal of unwanted or leftover pharmaceuticals into sanitary sewers [1,2,[52][53][54][55][56].…”

Section: Introductionmentioning

confidence: 99%

Pharmaceuticals in the Built and Natural Water Environment of the United States

Deo

Halden

2013

Water

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Abstract:The known occurrence of pharmaceuticals in the built and natural water environment, including in drinking water supplies, continues to raise concerns over inadvertent exposures and associated potential health risks in humans and aquatic organisms. At the same time, the number and concentrations of new and existing pharmaceuticals in the water environment are destined to increase further in the future as a result of increased consumption of pharmaceuticals by a growing and aging population and ongoing measures to decrease per-capita water consumption. This review examines the occurrence and movement of pharmaceuticals in the built and natural water environment, with special emphasis on contamination of the drinking water supply, and opportunities for sustainable pollution control. We surveyed peer-reviewed publications dealing with quantitative measurements of pharmaceuticals in U.S. drinking water, surface water, groundwater, raw and treated wastewater as well as municipal biosolids. Pharmaceuticals have been observed to reenter the built water environment contained in raw drinking water, and they remain detectable in finished drinking water at concentrations in the ng/L to μg/L range.

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Sorptive removal of tetracycline from water by palygorskite

Cited by 247 publications

References 36 publications

Sorption and desorption of tetracycline on layered manganese dioxide birnessite

Sorption and desorption of tetracycline on layered manganese dioxide birnessite

Facile synthesis, characterization of a MnFe2O4/activated carbon magnetic composite and its effectiveness in tetracycline removal

Pharmaceuticals in the Built and Natural Water Environment of the United States

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