This study aimed to synthesize Fe 3 O 4 @Methylcellulose/3-Aminopropyltrimethoxysilane (Fe 3 O 4 @MC/APTMS) as a new magnetic nano-biocomposite by a facile, fast, and new microwave-assisted method and to be utilized as an adsorbent for tetracycline (TC) removal from aqueous solutions. Fe 3 O 4 @MC/APTMS was characterized by Fourier transform-infrared (FTIR), Field emission scanning electron microscopy (FESEM), Energy dispersive spectroscopy (EDS), Mapping, X-ray diffraction (XRD), Thermal gravimetric analysis (TGA), Brunauer-Emmett-Teller (BET) and vibrating sample magnetometer (VSM). The point of zero charge (pH zpc ) value of the nano-biocomposite was estimated to be 6.8 by the solid addition method.Optimum conditions were obtained in TC concentration: 10 mg L −1 , adsorbent dosage: 80 mg L −1 , contact time: 90 min, and solution pH: 6 with the maximum TC removal of 90% and 65.41% in synthetic and actual samples, respectively. The kinetic and isotherm equations pointed to a pseudosecond order kinetic and Langmuir isotherm optimum tting models. Based on the values of entropy changes (ΔS) (50.04 J/mol k), the enthalpy changes (ΔH) (9.26 kJ/mol), and the negative Gibbs free energy changes (ΔG), the adsorption process was endothermic, random, and spontaneous.The synthesized adsorbent exhibited outstanding properties, including proper removal e ciency of TC, excellent reusability, and simple separation from aqueous media by a magnet. Consequently, it is highly desirable that Fe 3 O 4 @MC/APTMS magnetic nano-biocomposite could be used as a promising adsorbent for TC adsorption from aqueous solutions. HighlightsFe 3 O 4 @MC/APTMSas a new magnetic nano-biocomposite has been synthesized by a new microwave-assisted method and characterized with FESEM, EDS, Mapping, FT-IR, XRD, TGA, BET, and VSM techniques.The maximum removal e ciencies under optimal conditions (pH=6, TC concentration 10 mg L -1 , adsorbent dosage: 80 mg L -1 and contact time: 90 min) for synthetic and actual samples were obtained 90% and 65.41%, respectively.Isotherm, kinetic and thermodynamic study of tetracycline adsorption were investigated.Fe 3 O 4 @MC/APTMS exhibited excellentreusability property up to 5 cycles.

Introduction: Schools are safe places in the training of human, and they play a very important role in providing a healthy and cheerful life for students. Therefore, these places should be ideal from view of health and safety. The aim of this study was to investigate the environmental health status of schools in Jiroft city accordance with national unifying plan in 2019. Methods: This descriptive cross-sectional study, took a census on 99 schools of Jiroft in the 2019. For gathering the data, the standard school inspection checklist of the Ministry of Health was used. The data were collected by referring to schools and via viewing and interview with officials. The collected data were analyzed by SPSS 22 software. Results: The results for the both urban and rural schools revealed that the highest health status was food hygiene (100%), and lowest score was related to safety status for rural schools (50%). The health status of tools and equipment was 84.61% for both urban and rural schools, while building health status in urban schools and rural schools were 87.5% and 71.87% respectively. Conclusion: According to the results, the environmental health and safety status of schools in Jiroft city was evaluated as favorable. The indicators of food, personal, tools and equipment hygiene in urban and rural schools, as well as the safety index in urban schools, were highly favorable. In general, in the investigation of the indicators of this research, 85.8% of schools were evaluated favorably in terms of environmental health and safety indicators. To increase the percentage of the environmental health and safety indicators, the coordination of related organizations in health and education is necessary.

This study aimed to synthesize Fe3O4@Methylcellulose/3-Aminopropyltrimethoxysilane (Fe3O4@MC/APTMS) as a new magnetic nano-biocomposite by a facile, fast, and new microwave-assisted method and to be utilized as an adsorbent for tetracycline (TC) removal from aqueous solutions. Fe3O4@MC/APTMS was characterized by Fourier transform-infrared (FTIR), Field emission scanning electron microscopy (FESEM), Energy dispersive spectroscopy (EDS), Mapping, X-ray diffraction (XRD), Thermal gravimetric analysis (TGA), Brunauer–Emmett–Teller (BET) and vibrating sample magnetometer (VSM). The point of zero charge (pHzpc) value of the nano-biocomposite was estimated to be 6.8 by the solid addition method. Optimum conditions were obtained in TC concentration: 10 mg L−1, adsorbent dosage: 80 mg L−1, contact time: 90 min, and solution pH: 6 with the maximum TC removal of 90% and 65.41% in synthetic and actual samples, respectively. The kinetic and isotherm equations pointed to a pseudo-second order kinetic and Langmuir isotherm optimum fitting models. Based on the values of entropy changes (ΔS) (50.04 J/mol k), the enthalpy changes (ΔH) (9.26 kJ/mol), and the negative Gibbs free energy changes (ΔG), the adsorption process was endothermic, random, and spontaneous. The synthesized adsorbent exhibited outstanding properties, including proper removal efficiency of TC, excellent reusability, and simple separation from aqueous media by a magnet. Consequently, it is highly desirable that Fe3O4@MC/APTMS magnetic nano-biocomposite could be used as a promising adsorbent for TC adsorption from aqueous solutions.