The removal of amoxicillin from wastewater using organobentonite.

Abstract:

:Organobentonites used as absorbents to remove amoxicillin from wastewater have been investigated here because they are effective in removing organic pollutants. It is evident that bentonite modified with hexadecyl trimethyl ammonium (DK1) can effectively remove amoxicillin from aqueous solution. Batch experiments showed that the adsorption of amoxicillin onto DK1 fitted well to a pseudo second-order kinetic model with corresponding rate constants (0.0187 g/mg min at 20 °C). The Langmuir isotherm provided the highest adsorption capacity (26.18 mg/g at 20 °C). Our thermodynamic study suggested that the adsorption of amoxicillin onto DK1 was physisorptive and endothermic in nature. Furthermore DK1 was characterized by scanning electronic microscopy (SEM), Specific Surface Area (SSA), X-ray powder diffraction (XRD) and Fourier Transform Infrared (FTIR) spectrometer. These characterizations provided evidence of the morphological properties and how well the adsorption process performed. An adsorption mechanism including both ion-exchange and partition was proposed. Finally, DK1 was used to remove amoxicillin from wastewaters and the results showed 81.9% and 87.5% of amoxicillin was removed at 19.0 mg/L and 2.0 mg/L, respectively.

journal_name

J Environ Manage

authors

Zha Sx,Zhou Y,Jin X,Chen Z

doi

10.1016/j.jenvman.2013.08.032

subject

Has Abstract

pub_date

2013-11-15 00:00:00

pages

569-76

eissn

0301-4797

issn

1095-8630

pii

S0301-4797(13)00555-0

journal_volume

129

pub_type

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