Discrete geochemical behavior of Sr and Ba in the groundwater of Southern Mor Range, Balochistan, a tracer for igneous and sedimentary rocks weathering and related environmental issues
Applied Geochemistry, ISSN: 0883-2927, Vol: 130, Page: 104996
2021
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Article Description
A comparative study of Strontium (Sr) and Barium (Ba) along with associated major ions of groundwater was made from the Southern Mor Range, Balochistan, where both igneous and sedimentary rocks are exposed. In the studied samples, Sr 2+ varies from 237 to 6,723 with a mean of 1,688 μg/l, while Ba 2+ ranged from 40 to 1,332 μg/l with a mean of 207 μg/l. TDS and Sr 2+ displayed moderate positive, while Ba 2+ showed a slight negative relation. Majority (80.85%) of the samples have existed in the narrow pH range (7.5–8.5). The impact of water-rock interaction is evidenced from the Gibbs diagram; showed influence of igneous and sedimentary rocks on the release of Sr 2+ and Ba 2+. It is also evidenced from molar ratio of Sr 2+ /Ca 2+, Mg 2+ /Ca 2+, Na + /Cl −, Mg 2+ /Cl − of the groundwater. Strontium possessed fairly high relative mobility (RM, av. 0.349) and mobility index (MI, av. 4.38), while RM (av. 0.003) and MI (av. 0.04) of Ba 2+ was very low. The saturation indices (SI) plots barite vs. celestite, showed saturation of Ba, while Sr 2+ ions are unsaturated. The low Ba 2+ /Sr 2+ (av. 0.208) indicated the existence of aquifer in low elevation areas and the HCO 3 − /Cl − ratio (>1) demonstrated a short flow path and speedy flow. The suitability of groundwater was assessed for drinking purpose as per World Health Organization (WHO) and Expanded Programme on Immunization (EPI) guidelines and possible environmental issues were discussed.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0883292721001281; http://dx.doi.org/10.1016/j.apgeochem.2021.104996; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85106580835&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0883292721001281; https://dx.doi.org/10.1016/j.apgeochem.2021.104996
Elsevier BV
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