The present study deals with comparative evaluation of three different plants species, i.e. Canna indica L., Typha angustifolia L. and Cyperus alternifolius L. planted vertical constructed wetlands (CWs) microcosms for Cu, Cr, Co, Ni and Zn removal from aqueous solution. The effects of depth of the gravel beds were also studied in order to explore possibilities of development of compact constructed wetlands. Linear regression analysis was carried out for predicting the final removal efficiencies by variation of the treatment time and the bed depth of filter materials. To determine the removal mechanism and mobility of heavy metals in constructed wetlands, accumulation of these metals in gravel, roots, stem and leaves of plant species were investigated. Results demonstrate that the wetland bed depth has significant, direct effect on final heavy metal removal efficiencies. Considering three different plant species, Zn removal was found to be highest (99.3% in T. angustifolia planted CWs in 72. h of treatment time), and Co removal was found to be lowest (54.6% in T. angustifolia planted CW in 72. h of treatment time). © 2012 Elsevier B.V.

Item Type:	Refereed Article
Keywords:	Bed depth; Constructed wetlands; Desorption; Heavy metals; Metal accumulation; Bed depth; Canna indica; CO removal; Comparative evaluations; Constructed wetlands; Filter materials; Gravel bed; Heavy metal removal; Metal accumulation; Metal mobility
Research Division:	Engineering
Research Group:	Chemical engineering
Research Field:	Wastewater treatment processes
Objective Division:	Commercial Services and Tourism
Objective Group:	Water and waste services
Objective Field:	Water recycling services (incl. sewage and greywater)
UTAS Author:	Abbassi, R (Dr Rouzbeh Abbassi)
ID Code:	94995
Year Published:	2012
Web of Science® Times Cited:	79
Deposited By:	NC Maritime Engineering and Hydrodynamics
Deposited On:	2014-09-22
Last Modified:	2017-11-03
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