چكيده به لاتين
Pharmaceutical pollutants are considered one of the acute problems in modern life. Login drugs including active components (PhACs) analgesics, antibiotics, disinfectants and hormones to the food cycle lead to many environmental hazards. In recent years the use of Adsorption process to remove organic pollutants to separate chemical elements have been widely used. In this study, batch and fixed bed operation were applied for the removal of Amoxicillin and Diclofenac Pharmaceuticals by raw and cetyltrimethylammonium bromide modified Clinoptilolite and Synthetic nano-adsorbents from aqueous solution. By comparing the synthesis adsorbents and the natural adsorbent, it can be concluded that the adsorption capacity of the modified natural adsorbent is more than of the synthesized adsorbents in an essential manner. The effects of sorption parameters such as contact time, solution pH, adsorbent dosage, initial Pharmaceutical concentration, and temperature were evaluated for the modified natural adsorbent in a batch system. By increasing the amount of the natural absorbent from 0.5 to 20 g/L, the removal percentage of the amoxicillin and the diclofenac increased 72.09% and 68.78%, respectively. In addition, the results showed, with increasing temperature, the adsorption capacity of amoxicillin increased and it for diclofenac decreased. The experimental data were fitted by three isotherm models (Langmuir, Freundlich, and Temkin adsorption models), that the maximum adsorption capacity obtained by the Langmuir isotherm model for Diclofenac was 34.364 mg/g. Additionally, the maximum adsorption capacity calculated by Freundlich isotherm model for Amoxicillin is 37.303 mg/g at 25 °C. In each of the cases, the adsorption kinetic data for natural adsorbent and modified adsorbent were better described by the pseudo-second order kinetic model. Characterization of Clinoptilolite has been accomplished by XRF, SEM, BET, XRD and FTIR analysis, Which is based on the BET test, The specific surface area, mean pore diameter, and total volume cavities of clinoptilolite were 11.931 m2/g, 31.546 nm and 0.0941 cm3/g, respectively.
