ion mobility spectrometry for evaluation of bovine serum albumin nanoparticles ability to adsorb nalidixic acid

Abstract: antibiotic pollutants in water and sewage can cause severe damage to the environment and human health. therefore, removing them from the water is very important [1]. ion mobility spectrometry (ims) is a separation method that works at atmospheric pressure. the advantages of ion mobility spectrometer are high sensitivity, low detection limit, simple operation, and low cost [2]. in the present study, an ion mobility spectrometer was used to measure the remaining nalidixic acid (na) in an aqueous solution. the adsorption of na on bovine serum albumin (bsa) nanoparticles was investigated aimed at the removal of na from a water environment. the bsa adsorbent was synthesized by the desolvation technique. transmission electron microscope (tem) and ft-ir were used to identify the characteristics of synthesized bsa nanoparticles. the adsorption experiments were performed to examine the effects of solution ph (3-10), contact time (0.5-5) hours, and initial na concentration 30-80 ppm. moreover, adsorption kinetics and isotherms were studied. the results showed that the removal efficiency of na in optimal conditions ph = 10, temperature 25 °c, na concentration 80 mg /l, contact time 5 hours, and adsorbent dose 0.5 mg was 75%. the na adsorption isotherms and kinetics were in agreement with the freundlich isotherm and pseudo-second-order model, respectively. regarding the results of this study, bsa nanoparticles can be used as appropriate adsorbents for antibiotic removal from aqueous solutions.