TY - JOUR ID - 3003 TI - Sources of nitrate and bromide contaminants of groundwater in alluvial aquifer of Arak, Iran JO - Quarterly Journal of Tethys JA - JTETHYS LA - en SN - 2476-7190 Y1 - 2016 PY - 2016 VL - 4 IS - 2 SP - 100 EP - 115 KW - Arak aquifer KW - Factor Analysis KW - Mighan Lake KW - Nitrate and bromide KW - Salt water DO - N2 - The present study investigated NO3- and Br- contamination in groundwater of Arak aquifer of Markazi province. Correlation and factor analysis were used to detect interrelation and sources of concentration of NO3- and Br- ions and others physicochemical variables. No correlation was observed between NO3- and others contents, but positive correlation was identified between Br- with other major variables such as EC, TDS, Cl- and SO42- in the groundwater. The resulted data indicated that groundwater samples of two areas of Arak aquifer were severely contaminated with NO3- (up to 50 mg/L) and Br- (up to 0.5mg/L),which were exceeded the WHO and EU provisional guideline values. Nitrate was shown anthropogenic source and originated from sewage water from domestic and industrial activities. Bromide was originated from palaeo-salt water of Mighan Lake and has geogenic source. UR - https://jtethys.journals.pnu.ac.ir/article_3003.html L1 - https://jtethys.journals.pnu.ac.ir/article_3003_ae90740385f3ecc6d218fb5d8e617cba.pdf ER -