Home

Proceedings of the International Academy of Ecology and Environmental Sciences, 2014, 4(2): 62-67
[XML] [EndNote] [RefManager] [BibTex] [ Full PDF (367K)] [Comment Article]

Article

Bioaccumulation of chromium by Zea mays in wastewater-irrigated soil: An experimental study

Fatemeh Zojaji1 , Amir Hessam Hassani1, Mohammad Hossein Sayadi2
1Department of Environmental Science, faculty of environment and Energy, Science and Research Branch, Islamic Azad University, Tehran, Iran
2Environmental Sciences Department, University of Birjand, Iran

Received 5 July 2013;Accepted 15 August 2013;Published online 1 June 2014
IAEES

Abstract
The use of wastewater to irrigate plants is a common in many countries. This study aims to compare the bioaccumulation of chromium in Zea mays that irrigated with wastewater and tap water. The study was carried out in the field of waste water treatment plant in Birjand for 4 successive months from 16 August 2011 to 16 November 2011. 0.5 kg soil and 5 g of the root, stem and leave of Z. mays were collected monthly. Z. mays samples were digested by cloridric acid and soil samples were digested with nitric acid. Chromium concentration in the samples was determined by AA-7000 series of atomic absorption spectrophotometer. The average concentrations of chromium in wastewater and tap water were 12 ppb and 5 ppb respectively. The concentration of chromium in soils, which is irrigated with wastewater and tap water, were 26.68 ppm and 11.15 ppm respectively. The mean concentration of chromium in roots of Z. mays that is irrigated with wastewater and tap water were 10.28 ppm and 3.92 ppm respectively. The mean concentration of chromium in the stem of Z. mays which is irrigated with wastewater and tap water were 4.19 ppm and 1.17 ppm respectively while the mean concentration of chromium in leaves of Z. mays which is irrigated with wastewater and tap water were 2.27 ppm and 0.44 ppm respectively. The Study showed higher accumulation of chromium in soils and Z. mays plants which irrigated by wastewater. Cr is immobilized mainly in roots. The ratio of transfer factor of root:leaves is more than ratio of transfer factor of root:stems. It is noticeable that the transfer factor of Cr is decreasing with increase of Cr concentration. The transfer factor between roots and shoots of Z. mays irrigated with wastewater was lower than Z. mays irrigated with tap water. Cr was accumulate and immobilized mainly in roots than the other parts.

Keywords bioaccumulation;wastewater;tap water;Cr;Zea mays.


International Academy of Ecology and Environmental Sciences. E-mail: office@iaees.org
Copyright © 2009-2024 International Academy of Ecology and Environmental Sciences. All rights reserved.
Web administrator: office@iaees.org, website@iaees.org; Last modified: 2024/4/20


Translate page to: