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Phytoremediation of Total Petroleum Hydrocarbons From Highly Saline and Clay Soil Using Sorghum Halepense (L.) Pers. and Aeluropus Littoralis (Guna) Parl Publisher



Alavi N1 ; Parseh I2 ; Ahmadi M3 ; Jafarzadeh N3 ; Yari AR4 ; Chehrazi M5 ; Chorom M5
Authors
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Authors Affiliations
  1. 1. Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  2. 2. Department of Environmental Health, Faculty of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
  4. 4. Research Center for Environmental Pollutants, Qom University of Medical Sciences, Qom, Iran
  5. 5. Department of Agriculture, Faculty of Agriculture, Shahid Chamran University, Ahvaz, Iran

Source: Soil and Sediment Contamination Published:2017


Abstract

This study evaluated the effects of native plants (Sorghum halepense and Aeluropus littoralis), total petroleum hydrocarbons (TPH) concentrations, and nutrients on the removal of TPHs from a highly saline clay soil. For a period of 180 days, rhizosphere microbial number, plant biomass, and residual TPHs were determined monthly. Results showed that TPH removal from soil in the rhizosphere was 13% higher than that in the control (unplanted soil). In addition, the number of heterotrophic bacteria in the rhizosphere and non-rhizosphere soil was 7.407 and 6.629 log10CFU/g, respectively. The maximum TPH removal, microbial numbers, and plant biomass were measured in the treated soil, polluted with 0.86% (w/w) of TPH. The high clay and salinity of the experimental soil had a negative effect on the phytoremediation efficiency. Hence, it was necessary to improve the physicochemical properties of the soil to provide a good condition for plants and microbes, thereby increasing the phytoremediation efficiency. © 2017 Taylor & Francis Group, LLC.
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