Kinetic and Thermodynamic Behavior on the Sorption of Clindamycin from an Aqueous Medium by Modified Surface Zeolitic Tuffs

• Published in: Water, air, and soil pollution air, and soil pollution, 2018-10, Vol.229 (10), p.1-13, Article 340
• Main Authors: González-Ortiz, A., Ramírez-García, J. J., Solache-Ríos, M. J.
• Format: Article
• Language: English
• Subjects: Adsorption; Analysis; Antibiotics; Atmospheric Protection/Air Quality Control/Air Pollution; Bacteria; Climate Change/Climate Change Impacts; Clindamycin; Drugs; Earth and Environmental Science; Environment; Environmental monitoring; Hydrogeology; Isotherms; Lincomycin; Microbial drug resistance; pH effects; Soil Science & Conservation; Sorption; Surface active agents; Thermodynamic properties; Thermodynamics; Tuff; Volcanic rocks; Wastewater; Water Quality/Water Pollution
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-018-3970-3

Clindamycin (CLD), an antibiotic derivate of lincomycin, is widely used; the presence of this drug in the wastewater and the environment could produce resistance in bacteria. In this work, the sorption of this drug by two surfactant-modified zeolitic tuffs was studied considering contact time, initial concentration, pH, and temperature. The kinetic behavior indicates that the equilibrium times were between 15 and 12 h for all materials, and the results were best adjusted to Ho and Mc Kay model. The highest adsorption was obtained with the hexadecyltrimethylammonium-modified zeolitic tuff from Oaxaca, Mexico (1.56 mg/g). The sorption isotherms obtained showed a linear behavior, indicating a partition mechanism. The thermodynamic parameters were determined from the isotherms at different temperatures and Van Ho equation; the processes are exothermic and not spontaneous. The best pH for the adsorption is between 8 and 11. The results show that the modified zeolitic tuffs are potential materials for the adsorption of CLD from water.