versão On-line ISSN 1816-7950
versão impressa ISSN 0378-4738
BAJPAI, SK; CHAND, Navin e MAHENDRA, Manika. The adsorptive removal of a cationic drug from aqueous solution using poly (methacrylic acid) hydrogels. Water SA [online]. 2014, vol.40, n.1, pp.49-56. ISSN 1816-7950.
This study describes adsorptive removal of the antibiotic drug ciprofloxacin hydrochloride from simulated water using poly(methacrylic acid) (PMAA) as adsorbent. The adsorbent was characterised by various instrumental techniques such as X-ray diffraction (XRD), differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) spectroscopy. The adsorption equilibrium data, as studied at 3 temperatures, namely, 15, 25 and 37°C, were best interpreted by the Langmuir adsorption isotherm model. Moreover, an increase in temperature reduces drug uptake. A pH of the adsorption system in the range of 5.0 to 8.0 causes maximum adsorption of the drug. The presence of drug molecules in the adsorbent particles was shown by various techniques: X-ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) analysis. Antibacterial studies also reveal the adsorption of the drug from solution.
Palavras-chave : Adsorption; ciprofloxacin; Langmuir isotherm; X-ray diffraction; Fourier transform infrared (FTIR) spectroscopy.