Nastaran Aghelan; Soheil Sobhan Ardakani; Mehrdad Cheraghi; Bahareh Lorestani
Abstract
Background and Purpose: Phytoremediation is a new technology forremediation of contaminated soils, this study was conducted to evaluationof efficiency of EDTA, citric acid and salicylic acid chelating agents inphytoremediation enhancing of Amaranthus caudatus and Tagetes patula forelimination of Cr(III) ...
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Background and Purpose: Phytoremediation is a new technology forremediation of contaminated soils, this study was conducted to evaluationof efficiency of EDTA, citric acid and salicylic acid chelating agents inphytoremediation enhancing of Amaranthus caudatus and Tagetes patula forelimination of Cr(III) and Cu(II) from contaminated soils in 2018.Material and Methods: After soil pots contaminating by 50 and 100 (mg/kg)K2Cr2O7 and 200 and 400 (mg/kg) CuSO4 salts, and 2.5 (mmol/kg) of EDTAand citric acid (CA) and 2.0 (mmol/kg) of salicylic acid (SA) solution treating,the cultured seedlings were harvested after 60 days. Then, after seedlingsdigestion, Cr and Cu contents were determined using ICP-OESResults: Based on the results obtained, the maximum contents of Cr (mg/kg) in cultivated soil, root and stem samples of A. caudatus were 2.40, 5.18and 1.86 were found in the SA, EDTA and EDTA treatments, respectively andin T. patula with 2.74, 6.00 and 1.30 were found to be in the SA, EDTA andEDTA treatments, respectively. Also, the maximum contents of Cu (mg/kg)in cultivated soil, root and stem samples of A. caudatus with 6.74, 3.77 and3.34 were found to be in the SA, SA and EDTA treatments, respectively andin T. patula with 6.65, 3.45 and 9.50 were found to be in the SA, EDTA andEDTA treatments, respectively. On the other hand, translocation (TF) andbioconcentration (BCF) factors of A. caudatus both were greater than 1 insoils with 100 mg/kg added K2Cr2O7 containing CA, which indicates that thisspecies can be known as hyperaccumulator of CrConclusion: In conclusion, concerning to the considerable role of organic acidsin soil refining electrokinetic and phytoremediation efficiency enhancing,using of these soil amendment agents is recommended to cleanup ofcontaminated soil with heavy metals
Amin panah; Abdolali Karamshahi; Javad Mirzaei; Mohsen Darabi
Abstract
Background and abjective: Cement factories are considered as one of the most important pollution sources, especially heavy metals pollution. At present, Phytoremediation is known as one of the best strategies to eliminate or reduce these pollutants. In the present study the phytoremediation ability of ...
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Background and abjective: Cement factories are considered as one of the most important pollution sources, especially heavy metals pollution. At present, Phytoremediation is known as one of the best strategies to eliminate or reduce these pollutants. In the present study the phytoremediation ability of Cd, Zn, pb and Mn by nine trees species including Ailanthus glandulosa, Fraxinus rotundifolia, Robinia Pseudo Acasia, Ulmus umbraculifera, Eucalyptus microtheca, Quercus branti, Cupressus arizonica, Pinus eldarica and Cupressus sempervirens were investigated around the Ilam Cement Factory. Material and Methods: For measuring the deposition of metals in the leaves of studied species, 0.2 grams of their biomasses were separately weighed then 4 ml nitric acid (65%) was added to each sample. After 24-hincubation at room temperature, the proportions of considered metals were determined by atomic absorption spectrometry.. The obtainedresults were analyzed by SPSS 20 software usingKolmogrov-Smirnov, Leven and One-way ANOVA Tests. Results: Results showed that the amount of Cd in electro filter of factory was approximately close to the amount of Cd deposited in leaves of considered species, however; the amounts of pb, zn and mn in electro filter of factory were much more than the amounts of these three metals in leaves. The maximum and minimum accumulation of pb were related to Eucalyptus microtheca and Cupressus sempervirens respectively. In addition, the maximum and minimum amounts of deposited Mn were in Ailanthus glandulosa and Pinus eldarica respectively. The results also indicated that the maximum and minimum accumulation of Zn were in Quercus branti and Fraxinus rotundifolia respectively. Conclusion: It can be concluded from the results; the broad-leaf species are much more efficient than narrow-leaf ones in heavy metals remediation, so; it is suggested that in future development plans of green space, the broad-leaf species, especially Quercus branti, Ailanthus glandulosa Desf and Eucalyptus microtheca are more considered.