University Of Tehran Press Pollution 2383-451X 6 4 2020 12 01 Effect of Barley and Oat Plants on Phytoremediation of Petroleum Polluted Soils 695 703 78822 10.22059/poll.2020.297258.746 EN M. Barati Department of Chemical Engineering, Faculty of Shahid Rajaee, Shiraz Branch, Technical and Vocational University, Shiraz, Iran S. Safarzadeh Department of Soil Science, School of Agriculture, Shiraz University, Shiraz, Iran D. Mowla Chemical and Petroleum Engineering Department, School of Engineering, Shiraz University, Shiraz, Iran F. Bakhtiari Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran Journal Article 2020 02 04 Total Petroleum Hydrocarbons (TPHs) are one of the most dangerous<br />organic contaminants in the environment. Therefore, the remediation of the oilcontaminated<br />soil is necessary. The growth of barley and oat plant was studied in the<br />contaminated soils (4, 6, 8% TPHs) during 5 months. Plant height, wet and dry weight of<br />shoots and roots of both plants were measured. Results showed that oat and barley height,<br />wet and dry weight of shoots and roots decreased with increasing contamination levels.<br />Regardless of the plants species, the highest rate of TPH reduction was observed in soil<br />with 4% contamination and decreased with increasing the contamination level. The TPHs<br />concentration in the rhizosphere of barley and oat decreased by 29.66 and 24.04% at the<br />6% TPHs level and by 21.24 and 17.48% at the 8% TPHs level, respectively. Cultivation<br />of barley and oat plants significantly accelerated the biodegradation of hydrocarbons and<br />reduced TPHs content in soil as compared to unplanted soil. https://jpoll.ut.ac.ir/article_78822_103ac568e62fd31843941e865041a36f.pdf