Environmental associations of heavy and trace elements concentrations in Sarigiol ground water coal basin area
Ground water samples collected from 21 wells located in the hydrogeological, coal-bearing basin of Sarigiol, Western Macedonia, Greece have been analysed for determining trace elements concentrations. The water quality assessment reveals that the concentrations of heavy and toxic metals and trace elements are, for most of the samples; bellow the allowable limits specified by the existing regulatory framework. The trace elements As, Cd, Cu, Zn, V, Co, Be, B and Al are detected in very low concentrations, while Τi and Sn are detected in very low to negligible concentrations. The elements Pb, Hg, Ni, Mo, Crtot and Ba are present in low concentrations. This is also the case for Sr, Te and Bi. For these elements the legal framework does not specify allowable limits. Concentrations closed to or above the allowable limits have been determined for Sb and Tl. In addition, samples of water that have been collected from certain parts of Sarigiol basin show concentrations above the allowable limits for Al, Be, Ni, Cr, Sr and Se. However, the enrichment ratio, compared to the allowable limits determined by laws and regulations, is very low. Based on the results presented and evaluated in this contribution, it is concluded that adverse impacts to the human and natural environment are not probable. The water pumped from the wells of the area can be used safely for irrigation and water supply.
KeywordsGround Water Well Bore Trace Element Concentration Karstified Aquifer Allowable Limit
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