الفهرس 
Sources of Contaminants
MATERIALS AND METHODSOnly 14 pages are availabe for public view
 |  | from | 204 |  |  |
| | | from | 204 | | |
Abstract
At present, environmental pollution caused by heavy metals worldwide is
a problem of major concern; lead (Pb) is one of the most common heavy metal
contaminants found in soils as a result of agricultural activities, urban activities
and industrial activities such as mining and smelting. It is toxic for both humans
and animals.
This study aim to remediate soil contaminated with lead heavy metals
using sixteen lab scale vertical sand columns artificially contaminated with
5000 ppm lead. The technique used was washing technology using eight
remediation washing solution with different concentration (water, nitric acid,
acetic acid, citric acid, hydrochloric acid, sodium hydroxide, calcium chloride
and EDTA).
The contamination concentration distribution through the soil was
monitored using the change in soil electrical resistance. Removal of
contamination tends to be dependent on washing solution type and
concentration of the washing solution for the same soil type.
EDT A shows the best remediation solution for lead contamination while
calcium chloride and water show the least effect of contamination
transportation.
Bioscreen numerical analysis software is used to predict the movement of the
contamination and concentration through the sand column and its validation has
been checked using the experimental laboratory results. Parametric study is
conducted to examine the effect of the three dimension analysis, sand density
and washing time on the predicted results.
The effect of high concentrated remediation solution on a mixture of
cement with bentonite to work as underground horizontal barrier preventing
ground water contamination has been examined. All remediation solutions show
high efficiency impact except for citric and acetic acids.
Key words
Heavy metals, soil remediation, contaminated ground water, public health, soil
remediation solutions, soil wash, soil electric resistanc