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The potential of Sedum alfredii Hance for the biosorption of some metals from synthetic wastewater by Ji Bing Xiong; Qaisar Mahmood; Min Yue is a Environmental Science article available to read on EtoBox.

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The capacity of a terrestrial Zn/Cd hyperaccumulator Sedum alfredii Hance to purify water polluted by Zn, Cd, Cu and Pb along with their removal pathway was investigated. S. alfredii Hance was grown in synthetic wastewater in 2.5-L capacity containers contaminated with (mg L -1 ) 19.20 Zn, 11.24 Cd, 3.27 Cu and 0.53 Pb, respectively. The supplied metal concentrations were comparable with those in plating industry wastewater. After a growth period of 7 days the average removal rates for Zn, Cd, Cu and Pb, were 94.07%, 82.33%, 96.03% and 69.61% respectively. Both root surface adsorption and absorption contributed to metal uptake. Root surface adsorption accounted for 67.74%, 24.03%, 66.53% and 70.77% of the total respective Zn, Cd, Cu and Pb, removal by S. alfredii. Addition of heavy metals stimulated the growth of S. alfredii over the control (without any addition of heavy metals) that might cause enhanced metal removal from wastewater. These results indicated promising potential of S. alfredii for remediation of a mixture of heavy metals containing wastewater. Rhizospheric microorganisms, root exudates and metal adsorption on the root surface of S. alfredii might be possible contri

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Author

Ji Bing Xiong; Qaisar Mahmood; Min Yue

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0011-9164)

Published

2011

Language

EN

Field

Environmental Science (Physical Sciences)