reza hamed moghadam salari; Abbas Ali Ghezelsofloo; milad Iranshahy
Abstract
The purpose of this study is to investigate the potential of some plants for Phytoremediation of soil contaminated with lead, zinc, cadmium and copper. To do this, four plant species of Achillea millefolium, Agropyron elongatum, Bouteloua dactyloides and Artemisia sieberi were cultivated and plant samples ...
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The purpose of this study is to investigate the potential of some plants for Phytoremediation of soil contaminated with lead, zinc, cadmium and copper. To do this, four plant species of Achillea millefolium, Agropyron elongatum, Bouteloua dactyloides and Artemisia sieberi were cultivated and plant samples were irrigated with refinery wastewater. The results showed that in terms of plants, Bouteloua dactyloides, Artemisia sieberi and Achillea millefolium are good transfer of metals to their aerial parts which is suitable for plant extraction (the most important technique of Phytoremediation). Agropyron elongatum mostly accumulates copper and lead metals in the root. This is a proper feature of phytostabilization. Also the capability of these four plants species for Phytoremediation is as follows: Bouteloua dactyloides> of Achillea millefolium> Artemisia sieberi = Agropyron elongatum. Bouteloua dactyloides is proper for Phytoremediation of all heavy metals. For Bouteloua dactyloides, plant transfer factor (TF) in metals: zinc, copper, lead and cadmium is 1.17 and 1.9, 1.12 and 1.41, respectively, and bio concentration factor (BCF) for that in these metals are 1.77 and 1.22, 0.95 and 1.37, respectively. Since Bouteloua dactyloides has high tolerance to drought and high temperatures and is also suitable for lawn making, it is suggested that this type of species is used for Phytoremediation of soils contaminated with heavy metals in polluted areas as well as lawn making so that in addition to soil cleansing from heavy metals and being proper with native climates in many parts of Iran and having low irrigation requirements.
Javad Daeizadeh; MAHSHID souri; Ehsan Zandi Isfahan; javad motamedi
Abstract
Total Petroleum Hydrocarbons are toxic and persistent pollutants that are considered as fundamental threat to the ecosystem. Phytoremediation, the use of plants for remediation of contaminated soils, is an effective and affordable way to reduce soil pollution. In this study, the potential phytoremediation ...
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Total Petroleum Hydrocarbons are toxic and persistent pollutants that are considered as fundamental threat to the ecosystem. Phytoremediation, the use of plants for remediation of contaminated soils, is an effective and affordable way to reduce soil pollution. In this study, the potential phytoremediation of pasture plants i.e. Agropyron intermedium and Dactylisglomerata in soil contaminated with crude oil of different concentrations (20, 30, 40 and 50 percent) was scrutinized for 120 days under greenhouse condition. At the end of the study, changes in biological factors (shoot height, shoot dry weight and root dry weight) of each species and changes in petroleum hydrocarbons of soil were measured and results were analyzed using SPSS software. The process of decay kinetics curve of petroleum percent was used to calculate the time it takes for decomposition of petroleum hydrocarbons. Results showed that three main features of biological factors of both studied species in different treatments were significantly different compared to control group. Analysis of changes in petroleum hydrocarbons indicated that Agropyronintermedium reduced 79.81 percent of oil in the treatment of 20% and reduced 58.54 percent of oil in the treatment of 50%. Therefore, it has higher phytoremediation ability in comparison with Dactylisglomerata. The results of the analysis of petroleum in soil samples, fitted with zero-order kinetic model showed that the first order kinetic model is the best model for simulating the trend of changes of Petroleum hydrocarbon of the soil
