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Volume 6, Issue 4, (2018)

Table of Contents

 

 

 

 

Air Pollution and Infertility A letter to Editor

Sanaz Alaee

Volume 6  |  Issue 4 |  Pages: 72-73 | PDF | HTML | XML

 

Abstract: Air pollution is one of the most important environmental issues in 21 century. It is so essential to understand relationship between air pollution and human health effects. Many air pollutants such as volatile organic compounds (VOCs) have several negative effects on human reproductive system. The objective of this letter to editor is to introduce the fundamental relationship between air pollution and human infertility. An extensive literature review was done to gather a large number of studies on effect of various air pollutants on human reproductive system and then an extended abstract was written as a letter to editor. It is clear that a wide range of air pollutants are able to be effective on human infertility. If the emission of pollutants is not appropriately controlled, the rate of human infertility will be significantly increased in near future.

 

 

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Pilot-Scale Evaluation of CO2 Loading Capacity in AMP Aqueous Solution beside the Improvers HMDA-NH3 under a Series of Operational Conditions

Amin Ale-Ebrahim Dehkordi, Alireza Jahangiri, Amirreza Talaiekhozani, A.Heidari Semiromi

Volume 6  |  Issue 4 |  Pages: 74-80 | PDF | HTML | XML

 

Abstract: Nowadays, carbon dioxide removal has to be ingeniously managed because of its environmental and health effects. CO2 as a heat-trapping greenhouse gas is pumped into the atmosphere through anthropogenic activities. This specific characteristic of CO2 gas not only adversely impacts the environment but also imposes noxious effects on human life. In spite of all the various and potential scientific technics for CO2 removal, gas absorption using alkanolamines solvents has played a significant role in industries in recent decades. In the present research, the equilibrium set up for measuring CO2 solubility in aqueous solvents was assembled. CO2 loading data in aqueous Amp and Amp (3M) activated with HMDA and NH3 were assessed under the influence of various operational conditions of CO2 partial pressures (8.44, 25.33, and 42.22kPa), temperatures (303, 313, and 323K) and solvent concentrations of (0.5, 1.5 and 3M) for pure AMP and (0.4, 0.8 and 1.2M) for HMDA-NH3. The result showed that CO2 loading of AMP activated HMDA-NH3 increases with decreasing system temperature and increasing CO2 partial pressure. Furthermore adding the HMDA solvent into the system increased CO2 loading before it followed a slight decrease while adding NH3 decreased the amount. Concerning efficiency enhancement, it was comprehended that, HMDA could be considered among promising improvers while NH3 as an additive beside AMP or as a based solvent, perform well in CO2 absorption process only under specific operational condition.

 

Keywords: CO2 solubility, AMP, Ammonia (NH3), Loading

 

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The Study of Heavy Metals in Sediments Sampled From Dal Lake

 Faizanul Mukhtar, Hamida Chisti

Volume 6  |  Issue 4 |  Pages: 81-83 | PDF | HTML | XML

 

Abstract: Water quality monitoring has been high priority to determine the current conditions of the water system. The fast-growing population, unmanageable urbanization, steep industrialization and improper utilization of water resources have led to the unmatched destruction of water quality throughout the globe. The present study evaluates some of the heavy metals sampled from Dal Lake on temporal basis. These sediments were sampled and analyzed for heavy metals by atomic absorption spectrophotometery. However, the observed heavy metal concentration in these sediments was below the recommended limits. Thus, monitoring of man-made pollution which may lead to ecosystem and food chain contamination is necessary.

 

Keywords:  Water quality, Dal Lake, Sediments, Heavy metals, Temporal basis

 

 

 

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