TITLE

Survey of Typha Latifolia for Phytoremediation of Cadmium in International Shadegan Wetland

AUTHOR(S)
Hemmati, Farshid; Nezhad, Mahta Yazdi
PUB. DATE
December 2012
SOURCE
Advances in Environmental Biology;Dec2012, Vol. 6 Issue 13, p4041
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Heavy metals are important inorganic pollutants that are entered to aquatic ecosystems by municipal, agricultural and industrial wastewater. Heavy metals can transport and accumulate throughout the food chain. Accumulation of heavy metals in organism's tissues is called biomagnification (1). These elements are not biodegradable, therefore we have to remove or immobilize them for cleaning up the polluted environment (2). In this research, macrophytes potential for remediating of Cd by phytoextraction process was investigated. For this research, Typha latifolia and bottom sediment at 3 polluted stations and 1 control station in summer and winter seasons were sampled. Generally 72 macrophyte and 24 bottom sediment samples were taken. Preparing and chemical digestion was preformed according to the standard methods and Cd concentration in samples was measured by using flame atomic absorption spectrophotometery. Then with utilizing Dunkan test and Varians Analysis (%95 precision), bioconcentration of Cd in the organs of studied macrophyte and sediment were compared by statistical tests. Samples analysis results in the summer season showed the average of Cd concentrations in sediments 3.97 (ppm) and roots and stems of Typha latifolia respectively were 2.6 (ppm) and 1.25 (ppm). Also in the winter season average of Cd concentrations in sediments roots and stems of Typha latifolia, respectively 4.25 (ppm), 2.67 (ppm) and 1.17 (ppm) were obtained. The achieved results demonstrated bed sediments of Shadegan International Wetland have Cd pollution and Typha latifolia capable for phytoextraction and accumulation of Cd in the macrophyte organs.
ACCESSION #
90475333

 

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