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With the exception of cadmium, the concentration of chromium, nickel and copper in leachates of the artificial soils have got to a stable level by the end of the experiment. The finial concentration of copper in leachates of artificial soils ranged from 27.1  to 127.5, which was below the European threshold value for drinking water, (1000). While, finial nickel and chromium concentration in leachates surpassed the European threshold values for drinking water.

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Except the cadmium, the concentration of chromium, nickel and copper in leachates from  the artificial soils have got to a stable level at the end of the experiment. The finial concentration of copper in leachates from artificial soils ranged from 27.1  to 127.5, which was below the European threshold value of drinking water, (1000). While, finial nickel and chromium concentration in leachates surpassed the European threshold ones.
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