Arsenic Polluted Groundwater: Epidemiological
Study And Efficient Removal Method
Author(s)
G. Badalians Gholikandi, M. Sadrzadeh Ardebili, R. Riahi
& H. R. Orumieh
Abstract
Arsenic is mainly found throughout the crust in arsenic sulfide, metal arsenate
and arsenide forms. The pollution of the ground water in some regions in the
west of Iran, especially in Kurdistan province, which is above the allowable
range (0.01 mg/lit), requires an optimum technical and economic solution for its
removal. This research investigated the epidemiological situation and the
feasibility of removal of arsenic from groundwater using the best efficient
method considering local, economical and technical parameters. Field
monitoring of water resources showed that in seven villages the arsenic
concentration was higher than the WHO guideline (10 µg/L to <500 µg/L).
Using a logistic regression model, there is found to be a significant relation
between lifetime relative intake of arsenic from drinking water and
hyperkeratosis and also hyper pigmentation. Correlation between hyperkeratosis
and hyper pigmentation is considerable. According to results of hair analysis,
arsenic concentration in hair is from 0.021 to 3.41 with average of 0.56 mg/kg.
There is a close relation between hair arsenic and total arsenic intake via
drinking water. After investigation of the epidemiological and environmental
parameters, two pilot studies, modified activated alumina and the softening
method, were considered. According to the results of the modified activated
alumina pilot study, it has high efficiency for arsenic removal. The adsorption
isotherm for both species of arsenic (III and V) is compatible with both
Freundlich and Langmuier models. The results of the softening pilot studies
show that in pH>10.5 removal is done up to about 90% and for the initial arsenic
Keywords
arsenic, ground water, epidemiology, removal efficiency
Related Book
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