Zinc phytoremediation by desert shrub Acacia victoriae benth.
Subject Areas :
Khadijeh
Khermandar
1
(Ph.D. Candidate in Desert Management and Control, Gorgan University of Agriculture Sciences and Natural Resources, Gorgan, Iran.)
Ali
Mahdavi
2
(Associated Professor, Department of Forest Science, Faculty of Agriculture & Natural Resources Ilam University, Ilam, Iran.)
Keywords: Heavy Metals, Phytoremediation, Pollution, Tolerance index, Zinc,
Abstract :
In this study was purposed to investigate the absorption of zinc by Acacia victoriae. ‎The one year old shrubs were randomly selected in 3 replications and exposed by Zinc-sulfate in four concentration (0, 50, 250, 500 mg/l). Some of the morphological and physiological properties such as plant height, collar diameter, leaf number and area, green and dry weight of plant, tolerance index, grade of growth inhibition and chlorophyll content as well as bioaccumulations of Zn in different plant tissues ‎were evaluated. Results showed that the properties were significantly affected by Zn. However, the effect of high concentration of Zn ‎had slight decrease in the properties, that didn't have any series effects on tree as well as the signs of toxicity with zincwas not observed. In addition, the amounts of accumulation of Zn in the roots were higher than above-ground tissues, so that about 80% of Zn (4794.5 mg/kg), more than 13% of Zn (797.9 mg/kg), and about ‎7% of Zn (488.35 mg/kg) were accumulated in the root tissues, the stem tissues, and the leaves, respectively. The bioaccumulation and transfer factors were also measured to higher one and lower one, respectively. Generally, the result demonstrated that the Acacia victoriae ‎could be affected‏‎ as a phytoremediation‎ in‏ ‏reduction of soil pollution to Zn‏.
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