Abstract
The removal of chromium (VI) from an aqueous solution using persimmon tannin adsorbent was examined. The amount of Chromium (VI) removed was strongly affected by the pH of the solution. All amount of Cr (VI) was removed under pH2, howeber, the amount of that was decreased with increasing the pH of the solution using 15mg dry weight basis persimmon tannin adsorbent. A part of Cr (VI) was reduced other oxidation stage by persimmon tannin. The amount of Cr removed was increased with increasing the concentration of the Cr of the solution. The amount of Cr removed was fitted with the Langmuir isotherm.
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