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. 2016 Jun;23(12):12384-91.
doi: 10.1007/s11356-016-6373-2. Epub 2016 Mar 17.

Removing heavy metals from Isfahan composting leachate by horizontal subsurface flow constructed wetland

Reza Bakhshoodeh  1 , Nadali Alavi  2   3 , Amir Soltani Mohammadi  4   5 , Hossein Ghanavati  4   5
Affiliations

Removing heavy metals from Isfahan composting leachate by horizontal subsurface flow constructed wetland

Reza Bakhshoodeh et al. Environ Sci Pollut Res Int. 2016 Jun.

Erratum in

Abstract

Composting facility leachate usually contains high concentrations of pollutants including heavy metals that are seriously harmful to the environment and public health. The main purpose of this study was to evaluate heavy metals removal from Isfahan composting facility (ICF) leachate by a horizontal flow constructed wetland (HFCWs) system. Two horizontal systems were constructed, one planted with vetiver and the other without plant as a control. They both operated at a flow rate of 24 L/day with a 5-day hydraulic retention time (HRT). The average removal efficiencies for Cr (53 %), Cd (40 %), Ni (35 %), Pb (30 %), Zn (35 %), and Cu (40 %) in vetiver constructed wetland were significantly higher than those of the control (P < 0.05). Accumulations of heavy metals in roots were higher than shoots. Cd and Zn showed the highest and the lowest bioconcentration factor (BCF), respectively. Vetiver tolerates the extreme condition in leachate including high total dissolved solids.

Keywords: Compost; Constructed wetland systems; Heavy metals; Horizontal flow; Leachate; Vetiver.

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