Mohsen Yazdani; Ali Asghar Najafpoor; Ali Akbar Dehghan; Hossein Alidadi; mahmood dankoob; Reyhane Zangi; Sima Nourbakhsh; Reza Ataei; Ali Asghar Navaei fezabady
Abstract
Background and objectives: Tetracycline is known as the second high consumed groups of antibiotics throughout the world, which their entrance into the domestic wastewater will lead to pollute the water resources. The aim of this study was to determine the performance of combined Ultrasonic/UVprocess ...
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Background and objectives: Tetracycline is known as the second high consumed groups of antibiotics throughout the world, which their entrance into the domestic wastewater will lead to pollute the water resources. The aim of this study was to determine the performance of combined Ultrasonic/UVprocess in removal of tetracycline antibiotic from aqueous environments. Material and methods: This experimental study was performed by the ultrasonic bath associated with ultraviolet radiation. To determine the effects of independent variables including contact time (5-60 min), initial antibiotic concentration (5-25 mg/l), pH (3-10) and the input power (100- 300 W) on response variable (tetracycline removal), the samples were taken from reactor in different time intervals and the residual concentrations of tetracycline were measured by spectrophotometer in 261 nm wavelength. Results: The results of this study showed that the removal efficiency of UV and Ultrasonic processes was16% and 32% in optimum conditions, respectively. While in Ultrasonic /UV process, removal efficiency increased. The best removal efficiency (72%) was observed in pHof 4.5, antibiotic concentrationof10 mg/I, input power of240 W and contact timeof50 min. Conclusion: According to the obtained results, Ultrasonic/UVprocess can be used as an effective process to remove the tetracycline antibiotic from aqueous solutions.
Ali Asghar Navaei fezabady; Hossein Alidadi; Ali Asghar Najafpoor; Mahmoud Dankoob; Mohsen Yazdani; Masoumeh Saghi; Mohammad Naser Shafiee
Abstract
Background & objective: Evaluation of the effects on environment is an executive view for sustainable development. Solid waste is one of the factors that pollute the environment and the management, control and proper hygiene play a key role in promoting the health of society. So, in establishing ...
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Background & objective: Evaluation of the effects on environment is an executive view for sustainable development. Solid waste is one of the factors that pollute the environment and the management, control and proper hygiene play a key role in promoting the health of society. So, in establishing the composting plants, the environmental issues should be considered and a proper place for these plants must be chosen. This can be one of the most important tasks in waste management programs in developing countries. The aim of this study was to determine the effects of these plants on environment and the procedures to be carried out in this field. Materials & Methods: This research was a review study. By Using the key words (such as compost plants, environmental impact assessment, Iran) the related articles on Web sites google schoolar, iranmedex , SID, Magiran and civilica were searched and studied. Results: In this study, Articles in the period 1995 to 2016 were studied and 40 papers were selected. One paper Environmental impact assessment study methods, One paper method Adkins and Brooke,7 paper method Leopold matrix, one paper matrix math,one paper matrix method of rapid, 2 paper Matrix interactions, the Check list for assessing and one paper matrix type III. Conclusion: In most reviewed studies, the method of Leopold matrix has been used to assess the environmental impact of compost plant. Leopold matrix method has been considered by researchers and experts because of its accuracy, surveying in the construction and operation phases, using two-dimensional tables to express the effects of a compost plant project on the environment, determining suitable place And finally scoring waypoint is placed by specialists for more Compost Plant