Studies on the Adsorption of Hg~(2+) by Activated Carbon-Chitosan Compound Adsorbent

Chitosan with 94.2% of deacetylation degree was dissolved into 0.5% acetic acid to get 0.5% chitosan-acetic acid solution.Then solid carbon-chitosan compound adsorbent was made with mass ratio of chitosan to carbon at 1∶50 to remove Hg2+ in waste water.The results indicated that when the Hg2+ content in water was 100 mg/L,pH at 3.7,the adsorption time was 25 min and the adsorbent dosage was 2.5 g/L,the removal rate of Hg2+ was 99.56%;which increased by 17.22 percentage point compared with using activated carbon only.