The Karasu Stream is located in the province of Sakarya in Turkey. It flows into the Black Sea with an output of 10 m3/s. Chemical compositions of surface and ground waters change following interaction with geological units and chemical weathering at the surrounding rocks. This change may be realized as passing of the ions mobilized from the rocks and soil into the water. Hence, concentrations in natural waters of some ions that may negatively affect human health may increase. Some of heavy-metal concentrations in the Karasu Stream water were slightly higher than the world average values. High ions contents in the Karasu Stream water are related to geological origin. The ions such as Al, Sb, As, Ba, Cr, Se, Pb, Fe and Zn in the Karasu Stream waters increases by chemical weathering of the rocks and water - rock interaction. The amount of aluminum (Al) in the Karasu Stream water (823 μg/L) is higher than the drinking water limit values (200 μg/L) of the World Health Organization, Environmental Protection Agency, European Union and Water Intended for Human Consumption. Hence, the Karasu Stream water might need to be treated.

中文翻译：

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土耳其萨卡里亚卡拉苏溪水的可饮用性和水文地球化学特征

卡拉苏溪流位于土耳其萨卡里亚省。它以 10 m3/s 的产量流入黑海。地表水和地下水的化学成分随着地质单元的相互作用和周围岩石的化学风化而发生变化。这种变化可以通过从岩石和土壤中移动的离子进入水中来实现。因此，某些可能对人类健康产生负面影响的离子在天然水中的浓度可能会增加。乌龟溪水中部分重金属浓度略高于世界平均值。乌龟溪水中的高离子含量与地质成因有关。喀土溪水体中的铝、锑、砷、钡、铬、硒、铅、铁、锌等离子由于岩石的化学风化作用和水-岩相互作用而增加。乌龟溪水中的铝（Al）含量（823 μg/L）高于世界卫生组织、环境保护署、欧盟和人类消费水的饮用水限值（200 μg/L） . 因此，可能需要对乌龟溪水进行处理。