A preparation method for the treatment of Cr(VI) composite adsorbent Ca-AC

摘要

The effects of weight ratio of Eucalyptus and CaCl2, carbonization temperature and carbonization time on the composite adsorbent (Ca-AC) were studied. The best conditions for composite adsorbent (Ca-AC) were obtained: the weight ratio of CaCl2 to the eucalyptus sawdust was 2:1; the carbonization temperature was 650 °C; the carbonization time was 80 min. The Ca-AC yield reached 28.88%; the Cr(VI) adsorption value was 131.03 mg±g-1. The morphology and structure of the adsorbents were characterized. The results showed that the specific surface area of Ca-AC can reach 713 m2±g-1. The carboxyl, hydroxyl, lactones groups and amino could be determined on the activated carbon surface.