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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Health Sciences and Surveillance System
- نوع مقاله: Journal Article
- کلمات کلیدی: Nanocomposite,Cefixime,azithromycin,PAC/Fe/Si/Zn,UV-assisted removal
- چکیده:
- چکیده انگلیسی: Background: Pharmaceutical pollutants are one of the most important pollutants for water resources, and their health and environmental effects have been well estimated.Absorption is one of the best methods of the removal of antibiotics using nanocomposite. Methods: This experimental study was performed on Nano composites. The PAC/Fe/Si/Zn Nano composite was successfully synthesized using a co-precipitation method in which iron (Fe), silicon (Si) and zinc (Zn) were loaded on the activated carbon powder (PAC). The structural features of the as-synthesized Nano composite were determined using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectroscopy (EDS). The as-synthesized Nano composite was utilized to remove azithromycin and cefixime from aqueous solution with the assistance of UV light. The effect of operational parameters such as pH, irradiation time, initial azithromycin/cefixime concentration and Nano composite dose on UV-assisted removal performance was evaluated using an optimization process. Results: The UV-assisted removal activities indicated more removal percentage (99.7%) for azithromycin compared to cefixime (95.6%). The kinetics of removal was tested using Langmuir-Hinshelwood model, indicating the first-order reaction kinetics as the best model for UV-assisted removal of both azithromycin and cefixime. Adsorption equilibrium data were modeled using Langmuir and Freundlich isotherms. Azithromycin equilibrium adsorption showed a good fit with both Langmuir and Freundlich models, while the most suitable model for cefixime adsorption was estimated to be Langmuir isotherm. Conclusion: The findings showed that PAC/Fe/Si/Zn Nano composite were well able to degrade non-biodegradable antibiotics in aqueous solutions, which is very valuable from environmental aspects.
- انتشار مقاله: 14-07-1399
- نویسندگان: Azadeh Mehrdoost,Reza Jalilzadeh Yengejeh,Mohammad Kazem Mohammadi,Ali Akbar Babaei,Azadeh Haghighatzadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Response surface methodology,Advanced oxidation processes,Moving Bed Biofilm Reactor,Antibiotic Azithromycin
- چکیده:
- چکیده انگلیسی: Antibiotics are among the major concerns in terms of environmental control due to their cumulative properties, adverse health effects on humans, and development of drug resistance. The present study aimed to investigate the efficiency of the combination of UV/H2O2 and moving-bed biofilm reactor (MBBR) systems in the removal of azithromycin from aqueous solutions using the response surface methodology (RSM). In the UV/H2O2 process, a low-pressure mercury vapor lamp with the power of eight Watts, wavelength of 254 nanometers, and intensity of 1.02 mw/cm2 was used to determine the effects of pH, azithromycin concentration, hydrogen peroxide concentration, and contact time on the removal efficiency of azithromycin. According to the obtained results, the highest removal efficiency in the UV/H2O2 process was obtained with the azithromycin concentration of 2 mg/L. Therefore, 2 mg/L of azithromycin was selected as the optimal concentration with the highest removal efficiency. Following that, the optimal concentration of azithromycin was injected into the MBBR reactor. In the combined process of UV/H2O2 and MBBR, the highest removal efficiency of azithromycin was 91.2%. Therefore, it could be concluded that the combined system of UV/H2O2 and MBBR had the highest efficiency in the removal of azithromycin from aqueous solutions.
- انتشار مقاله: 28-07-1398
- نویسندگان: Rouhollah Shokri,Reza Jalilzadeh Yengejeh,Ali Akbar Babaei,Ehsan Derikvand,Ali Almasi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Bagasse,sewage sludge,Vermicomposting ,Cow dung ,Kitchen Waste,Eisenia Fetida
- چکیده:
- چکیده انگلیسی: The sugar cane industry produces significant amounts of cane trash and bagasse. Inappropriate disposal of agro-wastes can lead to environmental problems. Converting wastes such as cane trash and bagasse (Bg) to a fertilizer and conditioner is the aim of sustainable waste management in sugar cane industry. Cow dung (CD), kitchen waste (KW), and sewage sludge (SS) were mixed with bagasse as amendment in different proportions: Bg:CD (1:1), Bg:CD (1:2), Bg:SS (1:1), Bg:SS (1:2), Bg:KW (1:1) and Bg:KW (1:2) in triplicate treatment with Eisenia fetida. Chemical analysis of the samples showed a significant decrease in total organic carbon (TOC) (20%-54%), total Kjeldahl nitrogen (TKN) (9.5%-39.7%) and C:N ratio (12%-31.2%), while total potassium (31.4%-54%) and available phosphorus (32%-55%) contents increased during vermicomposting. A significant difference was observed among weight and number of worms in control with other treatments at the end of vermicomposting. According to obtained results vermicomposting is an efficient method for sustainable recycling different classes of waste produced in sugar cane agro-industry.
- انتشار مقاله: 25-11-1394
- نویسندگان: Ali Akbar Babaei,Gholamreza Goudarzi,Abdolkazem Neisi,Zohreh Ebrahimi,Nadali Alavi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Adsorption,Methylene blue,kinetic,Linear and Non-Linear Models,Spent Tea
- چکیده:
- چکیده انگلیسی: The kinetic study of methylene blue (MB) adsorption using acid-activated spent tea (AAST) as an adsorbent from aqueous solution with the aim of comparing linear and non-linear regression analysis methods was performed at varying initial MB concentrations (10-100 mg/l). Hence, spent tea leaves, which were activated using concentrated sulfuric acid, were prepared. The physicochemical characteristics of the prepared adsorbent were also measured. In addition, a scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR) instruments were employed to determine the size, morphology, and functional groups of AAST. Furthermore, the influence of different particle sizes of adsorbent on the adsorptive removal efficiency of MB was evaluated. The obtained data on MB adsorption were fitted using 4 kinetic models, namely pseudo first-order, pseudo second-order, Elovich, and intraparticle diffusion (I-D). The results of kinetic investigations showed that pseudo second-order kinetic model compared to the other applied models, with significant coefficient of determination (r2 > 0.98), could best fit the experimental data of MB adsorption. In addition, among all linear forms of the pseudo second-order model, form 1 could better fit the MB adsorption data. Additionally, by comparing the performance of both linear and non-linear forms of the pseudo second-order kinetic model, it can be postulated that non-linear regression analysis could be more appropriate than the linear approach for kinetic study of MB adsorption onto the AAST adsorbent. Ultimately, based on the results of particle size experiments, the smaller the size of the adsorbent particles, the higher the adsorption efficiency of MB will be.
- انتشار مقاله: 27-08-1393
- نویسندگان: Ali Akbar Babaei,Zahra Alaee,Elham Ahmadpour,Amirhosein Ramazanpour-Esfahani
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Response surface methodology,Advanced oxidation processes,Moving Bed Biofilm Reactor,Antibiotic Azithromycin
- چکیده:
- چکیده انگلیسی: Antibiotics are among the major concerns in terms of environmental control due to their cumulative properties, adverse health effects on humans, and development of drug resistance. The present study aimed to investigate the efficiency of the combination of UV/H2O2 and moving-bed biofilm reactor (MBBR) systems in the removal of azithromycin from aqueous solutions using the response surface methodology (RSM). In the UV/H2O2 process, a low-pressure mercury vapor lamp with the power of eight Watts, wavelength of 254 nanometers, and intensity of 1.02 mw/cm2 was used to determine the effects of pH, azithromycin concentration, hydrogen peroxide concentration, and contact time on the removal efficiency of azithromycin. According to the obtained results, the highest removal efficiency in the UV/H2O2 process was obtained with the azithromycin concentration of 2 mg/L. Therefore, 2 mg/L of azithromycin was selected as the optimal concentration with the highest removal efficiency. Following that, the optimal concentration of azithromycin was injected into the MBBR reactor. In the combined process of UV/H2O2 and MBBR, the highest removal efficiency of azithromycin was 91.2%. Therefore, it could be concluded that the combined system of UV/H2O2 and MBBR had the highest efficiency in the removal of azithromycin from aqueous solutions.
- انتشار مقاله: 28-07-1398
- نویسندگان: Rouhollah Shokri,Reza Jalilzadeh Yengejeh,Ali Akbar Babaei,Ehsan Derikvand,Ali Almasi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Bagasse,sewage sludge,Vermicomposting ,Cow dung ,Kitchen Waste,Eisenia Fetida
- چکیده:
- چکیده انگلیسی: The sugar cane industry produces significant amounts of cane trash and bagasse. Inappropriate disposal of agro-wastes can lead to environmental problems. Converting wastes such as cane trash and bagasse (Bg) to a fertilizer and conditioner is the aim of sustainable waste management in sugar cane industry. Cow dung (CD), kitchen waste (KW), and sewage sludge (SS) were mixed with bagasse as amendment in different proportions: Bg:CD (1:1), Bg:CD (1:2), Bg:SS (1:1), Bg:SS (1:2), Bg:KW (1:1) and Bg:KW (1:2) in triplicate treatment with Eisenia fetida. Chemical analysis of the samples showed a significant decrease in total organic carbon (TOC) (20%-54%), total Kjeldahl nitrogen (TKN) (9.5%-39.7%) and C:N ratio (12%-31.2%), while total potassium (31.4%-54%) and available phosphorus (32%-55%) contents increased during vermicomposting. A significant difference was observed among weight and number of worms in control with other treatments at the end of vermicomposting. According to obtained results vermicomposting is an efficient method for sustainable recycling different classes of waste produced in sugar cane agro-industry.
- انتشار مقاله: 25-11-1394
- نویسندگان: Ali Akbar Babaei,Gholamreza Goudarzi,Abdolkazem Neisi,Zohreh Ebrahimi,Nadali Alavi
- مشاهده