Sources of Nitrate and Bromide ContaminantsinGroundwater ofthe Alluvial Aquifer of Arak, Iran

Journal of Water Sciences Research

مقاله 2، دوره 8، شماره 1 - شماره پیاپی 11، بهمن 2016، صفحه 13-30   

نوع مقاله: Original Article

نویسندگان

Feridon Ghadimi^{* 1}؛ Mohammad Ghomi²؛ Reza Azimi³

¹Assistant Professor, Department of Mining Engineering, Arak University of Technology, Arak, Iran

²Department of Mining Engineering, Arak University of Technology, Arak, Iran

³Markazi Regional Water Company

چکیده

The present study investigated NO3^- and Br^- contamination in groundwater of Arak aquifer, Markazi province, Iran. Correlation and factor analyzes were used to detecti nterrelations and sources of NO3^- and Br^- ion concentration and other physicochemical variables. No correlation was observed between NO3^- and otherscontents, but a positive correlation was identified between Br^-and other majorvariables such as EC, TDS, Cl^- and SO4^2-in the groundwater.The results showed that groundwater samples of two areas of Arak aquifer were severely contaminated by NO3^- (up to 50 mg/L) and Br^-(up to 0.5mg/L),which exceededthe WHO and EU provision alguideline values. Nitrate showed an anthropogenic source  that originated from sewage water from domestic and industrial activities. Bromide originated from palaeo-salty water of Mighan Lake with a geogenic source.

کلیدواژه‌ها

Arakaquifer؛ factor analysis؛ Mighan Lake؛ Nitrate and bromide؛ Salty water