Title: Evaluation of corrosivity and scaling properties of groundwater of central Gujarat for industrial usage

Abstract

The Central Gujarat is a sub-urban and industrialized region. Here, groundwater has been chiefly employed for industrial utilities. Hence, there has been much requirement to evaluate the groundwater quality in terms of corrosivity as well as scaling. Seven indices such as corrosivity ratio (CR), Langelier Saturation Index (LSI), Ryznar Stability Index (RSI), Puckorius Scaling Index (PSI), Larson-Skold index (LS), Revelle Index (RI) and Chloride Sulfate Mass Ratio (CSMR) have been applied to estimate the groundwater stability for industrial purpose. The CR and RSI values indicate that the groundwater in 98.58% and 51% respectively of total area is unsuitable for industrial purposes. The LSI and PSI values reveal that the groundwater in 97.87% and 56.2% respectively of total area can cause scaling in plumbing equipment. According to LS index, highly corrosive groundwater is found in 82.76% of the total area. Again, RI values display that groundwater of 97.67% of total area has been marginally affected by salinity. All the groundwaters with CSMR values >0.5 indicate to promote galvanic corrosion in water distribution network. Nevertheless, majority of the manifestations disclose that groundwater of VRB region is unsuitable for industrial applications. Maintenance of pipe lines in the water distribution network, corrosion and scaling prevention techniques, regular groundwater quality assessment should be carried out for the management of groundwater quality. However, this study is necessary for decision makers and policy makers to strengthen the sustainable management of groundwater resources. Similar kind of assessment can be simulated everywhere on the earth to assess groundwater qualitatively for industrial utilization.

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