The influence of media type on removal of arsenic, iron and boron from acidic wastewater in horizontal flow wetland microcosms planted with Phragmites australis
K Lizama Allende, DT McCarthy, TD Fletcher
CHEMICAL ENGINEERING JOURNAL | ELSEVIER SCIENCE SA | Published : 2014
In this study, horizontal flow wetland microcosms were used to test the effectiveness of two media types: (1) zeolite and (2) a series of limestone and cocopeat in the removal of arsenic (As), boron (B) and iron (Fe) from contaminated acidic waters such as those associated with mine waste. The wetlands were operated under a hydraulic loading of 30. mm/d, to treat acidic water with As. = 2.3. mg/L, Fe. = 97.3. mg/L and B. = 30.8. mg/L at pH 2. ±. 0.2. Both media were highly effective in the removal of As and Fe. The zeolite wetlands removed 99.9%, 96.1% and 12% of As, Fe and B respectively, whereas the removal efficiencies of the limestone/cocopeat wetlands were 99.8%, 87.3% and 17%. The cont..View full abstract
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Awarded by Australian Research Council Future Fellowship
The authors would like to thank Chilean Government (Becas Chile) for sponsoring Katherine Lizama Allende's Ph.D. studies. Fletcher is supported by an Australian Research Council Future Fellowship (FT100100144). We thank the staff from Department of Civil Engineering, Monash University, especially Frank Winston, Richard Williamson, Anthony Brosinsky, Christelle Schang, Peter Poelsma, Chris Rudiger, Perrine Hamel, Peter Kolotelo, Minna Tom and Javier Neira for assistance with the experimental setup and/or logistics.