STUDY ON THE SORPTION OF CHROMIUM(III) IONS IN AQUEOUS SOLUTION WITH DIATOMITE TREATED WITH MANGANESE OXIDE

摘要

In this paper, the properties and characteristics of diatomite treated with manganese oxide (MTD) for the removal of chromium(III) ions in aqueous solution was studied. The characters and performance of sorption MTD were compared with that of raw diatomite (RD). The results indicate that the trivalent chromium(III)) ion sorption capacities of diatomite were considerably improved after treated by manganese oxide. Due to the formation of manganese oxide (MnO) on the diatomite surface, the surface area of MTD was improved. And the sorption of chromium(III) by MTD was more than that in RD owing to the different electrostatic forces between the heavy metal ions and the surface of the diatomite. The removal of chromium(III) ions by RD and MID were both improved with the increment of synthetic solution concentration.