Abstract
Adsorption studies of mercury (II) from aqueous solutions on coirpith carbon were investigated under the varying conditions of agitation time, metal ion concentration, adsorbent dose and pH. Adsorption equilibrium reached in 10, 25, 30 and 40min for 10, 20, 30 and 40mgl−1 Hg(II) concentration. Adsorption followed both Langmuir and Freundlich isotherms. The adsorption capacity was 154mgg−1. The percent removal increased with the increase of pH from 2 to 5 and remained constant up to pH11.00. Desorption studies were performed with dilute hydrochloric acid and potassium iodide solutions.
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