MgAl-Layered double hydroxide for amoxicillin removal from aqueous media

被引：19

作者：

Elhaci, Amina ^{[1
]}

Labed, Fatima ^{[1
]}

Khenifi, Aicha ^{[1
]}

Bouberka, Zohra ^{[1
]}

Kameche, Mostefa ^{[1
]}

Benabbou, Khalil ^{[1
]}

机构：

[1] Univ Sci & Technol Mohamed Boudiaf USTO MB, LPCMCE, Fac Chim, Oran, Algeria

来源：

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 2021年 / 101卷 / 15期

关键词：

Amoxicillin removal; layered double hydroxide; adsorption; isotherm; recycling; SUSTAINED-RELEASE PROPERTIES; ACTIVATED CARBON; INORGANIC MATERIALS; ANTIBIOTIC REMOVAL; ISOTHERM MODELS; METAL-IONS; ADSORPTION; SORPTION; KINETICS; BIOSORPTION;

D O I：

10.1080/03067319.2020.1715374

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Amoxicillin (AMX) removal from aqueous media by MgAl-Layered double hydroxide (LDH) was investigated. LDH material with Mg2+/Al(3+)molar ratio of 2 was synthesised by co-precipitation at pH 9. The resulting material was characterised by thermogravimetry (TG), Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction and scanning electron micrograph (SEM). The surface charge of LDH was measured using zeta potential technique. AMX adsorption tests were achieved at different pHs, temperatures, contact time and initial AMX concentrations. The adsorption process turned out to be spontaneous and endothermic. AMX was found to adsorb according to pseudo-second-order kinetics, while adsorption isotherms agree with Sips model, suggesting that the adsorption of AMX onto MgAl-LDH occurs predominantly by chemisorption mechanism, showing a maximum monolayer adsorption capacity of 30.42 mg/g at 30 degrees C. Triplicate regeneration tests did not reduce the retention capacity.

引用

页码：2876 / 2898

页数：23

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