Document Type
Article
Abstract
Utilization of manufactured coal ash aggregates (MAs) as a subsoil substitute during restoration of an open pit was assessed in a three-factor, two-level factorial analysis. The factors of interest were the MA application rate (2:1 or 1:2 topsoil/MA volume ratio), rainfall intensity (high or low), and aggregate size (2.36–4.75 mm or 4.75–9.53 mm). Among the water quality parameters examined (pH, turbidity, heavy metal content (lead and cadmium), conductivity, and hardness), the last two parameters were significantly higher (p,0.05) in soil amended with MAs than in a control reactor using sand. A low rainfall intensity and larger aggregate size resulted in a lower water quality with regard to conductivity (7,12 mS/cm) and hardness (600,2000 mg/L as CaCO3) during the 63 day experiment.
First Page
1
Last Page
7
DOI
10.4177/CCGP-D-10-00004
Volume
3
Publication Date
1-1-2011
Recommended Citation
Hwang, S., Latorre, I., 2011, Impact of Manufactured Coal Ash Aggregates on Water Quality during Open Pit Restoration: 1. A Statistical Screening Test. Coal Combustion and Gasification Products 3, 1-7, doi: 10.4177/CCGP-D-10-00004
