| Autor: |
Toolabi A; Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran., Malakootian M; Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran.; Department of Environmental Health Engineering, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran., Ghaneian MT; Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. mtghaneian@yahoo.com., Esrafili A; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran., Ehrampoush MH; Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran., AskarShahi M; Department of Biostatistics and Epidemiology, Shahid Sadoughi University of Medical Science, Yazd, Iran., Tabatabaei M; Department of chemistry, Islamic Azad University, Yazd, Iran. |
| Jazyk: |
angličtina |
| Zdroj: |
AMB Express [AMB Express] 2018 Apr 18; Vol. 8 (1), pp. 59. Date of Electronic Publication: 2018 Apr 18. |
| DOI: |
10.1186/s13568-018-0589-0 |
| Abstrakt: |
In this study, modeling and degradation of diazinon from contaminated water by advanced oxidation process together with a new test for effluent bioassay using E. coli were investigated. The experiments were designed based on response surface methodology. Nanoparticles (NPs) were synthesized using the sol-gel method. The shape characteristics and specifications of elements in the nanoparticles were characterized using scanning electron microscope and energy dispersive X-ray, respectively. Diazinon was measured using high performance liquid chromatography device and by-products due to its decomposition were identified by gas chromatography-mass (GC-MS). In the present study, effluent bioassay tests were conducted by defining the rate of dehydrogenase enzyme reducing alamar blue method. According to statistical analyses (R 2 = 0.986), the optimized values for pH, dose of NPs, and contact time were found to be 6.75, 775 mg/L, and 65 min, respectively. At these conditions, 96.06% of the diazinon was removed. Four main by-products, diazoxon, 7-methyl-3-octyne, 2-isopropyl-6-methyl-4pyrimidinol and diethyl phosphonate were detected. According to the alamar blue reducing (ABR) test, 50% effective concentration, no observed effect concentration, and 100% effective concentration (EC 100 ) for the mortality rate of E. coli were obtained as 2.275, 0.839, and 4.430 mg/L, respectively. Based on the results obtained, it was found that mentioned process was high efficiency in removing diazinon, and also a significant relationship between toxicity assessment tests were obtained (P < 0.05). |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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