Fluoride occurrence and mobilization in geo-environment of semi-arid Granite watershed in southern peninsular India |
| |
| Authors: | Sakambari Padhi D Muralidharan |
| |
| Institution: | (1) National Geophysical Research Institute (Council of Scientific and Industrial Research), Uppal Road, Hyderabad, 500007, India |
| |
| Abstract: | Plausible forms of fluoride (F) responsible for the persistence of fluoride toxicity in ground water of a granitic terrain
of semi-arid region, which is the main source of drinking water, have been studied. The study area in Anantapur District of
Andhra Pradesh, India, is one of the chronic regions with excess fluoride in groundwater and the region is under transformation
into aridity due to poor rainfall and over-exploitation of groundwater. Geochemical analysis of soil, groundwater, and rock
samples of the study area revealed the presence of other toxic elements also in addition to fluoride which need to be addressed
in drinking water sector in near future. Soil fluoride leaching experiments demonstrated the probable mode of mobilization
of F into the groundwater through natural recharge process during monsoon. Analysis of saturation indices indicates that the
fluorite solubility alone is not attributable to the high fluoride content in groundwater. The groundwater flow controls fluoride
mobilization in the study area as it is evidenced through fluoride concentration and electrical conductivity increase from
catchment to downstream region. Creation of lesser fluoride groundwater sources through rainwater harvesting and artificial
recharge of groundwater in catchment areas is suggested as a long-term sustainable safe drinking water strategy. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
