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8735874 
Journal Article 
The role of phytoremediation in reduction of environmental pollution 
Ghasemi, N; Pourbalighy, M 
2016 
7 
86-92 
English 
Petroleum hydrocarbons are among the most important environmental organic pollutants and their existence in nature has caused many concerns due to toxicity, carcinogenic and genetic modification. These pollutants can absorbed to surface of soil particles or organic particles in the soil and gradually increase their concentration and enter surface water along with surface currents. There are several chemical and physical methods to deal with oil pollution in soil, most of which are used less due to high costs and harmful side effects. Thus, biology techniques such as phytoremediation have attracted more attention in recent years. Phytoremediation is a new and emerging technology in which resistant plants are used to remove or reduce the concentration of organic and inorganic pollutants and hazardous substances from the environment. This technique contains a series of technologies using natural or transgenic plants for refining of organic and inorganic environmental pollution of soil, water and air. In fact, phytoremediation using human interference such as agricultural technology will create right conditions for growth and plant establishment and will increase the normal activities of cleaning. The greatest advantage of this method compared to other methods is its low cost and simplicity. Appropriate plant selection is very important in this method which depends on climatic conditions of area, type and rate of soil contamination. Khuzestan province is considered as one of the most important centers of Iranian oil with vast oil and gas reserves and massive amounts of pollutants are transferred to this province due to the fact that it is near Persian Gulf. Crude oil well No. 69 of Marun 3 Oilfield which was sprayed to soil as oil contaminant in this study was injected into gas chromatography device in Microliter after extraction from soil with Soxhlet and bitumen asphalten. Each of the normal alkanes was calculated after presenting the GC peak of areas under the curve. Results of analysis of variance showed that using NPK fertilizer and regular aeration during modification process coincided with the growth of heterotrophic bacteria degrading oil had a significant effect on oil decomposition on the level of five percent. 37% of oil decomposition was observed in the control soil which has been due to regular aeration of oil and creation of 25-30 ° C soil temperature and humidity suitable for bacterial activity. © 2016, Institute of Integrative Omics and Applied Biotechnology. All rights reserved. 
Environmental pollutants; Heterotrophic bacteria; Khuzestan province; Oil pollution; Phytoremediation