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Investigation of heavy metals containing acidic waste waters from coal mine
, Article 2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010, 18 June 2010 through 20 June 2010 ; June , 2010 ; 9781424447138 (ISBN) ; Sharif University of Technology
2010
Abstract
Waste water from ore plant layout central Alborz's coal has been investigated and analyzed. Studies showed that because of acidic character, the waste water contains heavy metals including Cu, Cr, Ba, Zn, V, Sr, Pb, Ni. Considering the importance of this topic for outgoing acidic waste waters which is hazardous for the environment, i.e. heavy metals, the same should not be transferred into the environment. Since their waste water is transferred into nearby agricultural ground, it was developed a method, so that waste water is primarily directed into a slug pond for sedimentation. In the second stage in another pond, the outflow of waste water was treated with chemicals. Also the pH was...
An integrated dynamic model for evaluating the influence of ground to air heat transfer system on heating, cooling and CO2 supply in Greenhouses: Considering crop transpiration
, Article Renewable Energy ; Volume 173 , 2021 , Pages 42-56 ; 09601481 (ISSN) ; Roshandel, R ; Avami, A ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Nowadays, one of the most important challenges in developing greenhouses is meeting their energy demand. The other challenge is the high water consumption of evaporative-cooling systems in arid and semi-arid regions. In this study, a integrated dynamic model is developed to determine the greenhouse relative humidity, carbon dioxide, and temperature, considering transpiration. The model is applied to a greenhouse utilizing a ground to air heat transfer system, located in the Alborz province of Iran and the results are validated with experimental data. Energy and water performance of the greenhouse are evaluated for the case study greenhouse. Then, the model is applied to a greenhouse (similar...
Effects of membrane compliance on pore water pressure generation in gravelly sands under cyclic loading
, Article Geotechnical Testing Journal ; Volume 33, Issue 5 , 2010 ; 01496115 (ISSN) ; Shakeri, M. R ; Sharif University of Technology
Abstract
The paper deals with an experimental study of the undrained cyclic behavior of a natural coarse sand and gravel deposit located in Tehran, a megacity situated on the continental side of the Alborz Mountain in Iran. Membrane compliance that plays a significant role in inhibiting redistribution of pore pressure and liquefaction in undrained cyclic triaxial tests performed on coarse granular soils is studied in this paper. Currently there is no or little satisfactory method for accounting for this phenomenon for gravelly soils, and thus the non-compliant cyclic loading resistanceof granular soils and the evaluation of the behavior of such material in natural and in situ state are not easily...