The origin and distribution of hexavalent chromium, Cr (VI) over four seasonal cycles was investigated through a conceptual model that included three aquifer systems in Cyprus. An extensive water sampling grid covered two sea water intruded coastal aquifers, namely the Kokkinochoria (A1) and Kiti-Pervolia (A2) aquifers and the Troodos massif (A3). Analytical results give a first insight to the presence of Cr (VI) in Cyprus ground and surface waters. The highest Cr (VI) value of 26 μg L-1 is observed in the Troodos area (A3) where Cr(VI) is detected in all sampled water systems (surface and ground/spring). Nonetheless, the highest median values of 4.6 and 4.5 μg L-1 are observed in the Kokkinochoria (A1) and Kiti-Pervolia (A2) study areas respectively, where the local aquifers are under increased pressure from agriculture, urbanization and seawater intrusion. Stable isotopes were used to discern the effect of return irrigation and seawater intrusion. Stable isotope analyses from Troodos samples show two distinct groups of meteoric and near meteoric waters whereas isotopically enriched water is shown to correspond to the Kiti and Kokkinochoria area.

中文翻译：

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塞浦路斯地下水和地表水中六价铬的发生和分布。

通过概念模型研究了六个季节周期内六价铬（Cr）的来源和分布，该模型包括塞浦路斯的三个含水层系统。一个广泛的水采样网格覆盖了两个海水侵入的沿海含水层，分别是Kokkinochoria（A1）和Kiti-Pervolia（A2）含水层和Troodos断层（A3）。分析结果为塞浦路斯地下水和地表水中六价铬的存在提供了第一见解。在Troodos地区（A3）观察到最高的Cr（VI）值为26μgL-1，在该区域中，所有采样水系统（地表和地面/泉水）中均检测到Cr（VI）。尽管如此，分别在Kokkinochoria（A1）和Kiti-Pervolia（A2）研究区分别观察到4.6和4.5μgL-1的最高中值，这些地区的局部含水层承受着来自农业的压力，城市化和海水入侵。稳定的同位素被用来识别回灌和海水入侵的影响。Troodos样品的稳定同位素分析显示出两组不同的陨石水和近陨石水，而同位素富集的水则对应于Kiti和Kokkinochoria地区。