| 摘要 |
<p>An activated carbon having an ash content as determined in accordance with ASTM 2866 of less than 1 % and which has a zinc adsorption capability such that a filter containing 1.5 g of the activated carbon will adsorb zinc contained in water at a concentration of from 3 to 25 mg/l so as to reduce the concentration of the zinc to below 3 mg/l is described. The activated carbon is suitable for use in water filters. Also described is a water purification system comprising an activated carbon filter and a redox alloy filter which is located upstream of the activated carbon filter so that in use water passes sequentially through the redox alloy filter and then through the activated carbon filter.</p> |
