Assessment of groundwater corrosiveness for unconfined aquifer system at Kalpakkam

Abstract

Groundwater samples from the shallow unconfined aquifer were collected from fifteen borewells in Kalpakkam nuclear plant site and were analysed for various physico-chemical parameters. The pH, temperature, salinity, TDS and EC were measured in the field. The borewell samples were analysed in the laboratory for Ca(2+), Mg(2+), Na(+), Cl(-), CO(2-)(3), HC(O-)(3), N(O-)(3) and SO(2-)(4). The Piper Trilinear diagram showed that majority of the borewell samples fall in Na - Cl +SO(4) type and Na - CO(3)+HCO(3) type. The Cl: HCO3 ratio of some borewell samples are categorized under injuriously contaminated to highly injurious type. The higher salinity levels encountered in some borewells emphasized the need for better understanding of groundwater corrosiveness. Accordingly, the Langeliar saturation Index (SI), Aggressivity index (AI) and Larson ratio (LnR) were evaluated for assessing the corrosive nature of the groundwater. The saline water incursion in the southern part of the study area increased the ionic concentration of Cl(-) and [Formula: see text] that made the groundwater corrosive.

Stability assessment and characterization of colloids in coastal groundwater aquifer system at Kalpakkam

“…Out of the 12 borewells, BW6, BW7, BW8 and PBW1 were brackish type and all the other 8 wells were of freshwater type. Similar observations were made by Sasidhar and Vijayakumar (2008).…”

Influence of water salinity on corrosion risk—the case of the southern Baltic Sea coast

“…As the temperature decreases, the maximum salt solubility also decreases (Helber et al 2012; Bingham et al 2010), which causes seawater to exhibit lower conductivity and higher electrolyte resistivity (Sharqawy 2013; Sasidhar and Vijay Kumar 2008). The lower the temperature is, the greater the oxygen solubility in water is and the greater the corrosion rate may be.…”

Effects of Sulfate, Chloride, and Bicarbonate on Iron Stability in a PVC-U Drinking Pipe

“…However, the anions were present simultaneously under a natural condition. Previous studies have indicated that the higher the value of LI, the higher the corrosiveness of water [36]. After a chemical analysis of the experiment water, the tendency release iron was analyzed by the LI index.…”