The effect of pH on removal of Cr (VI) by using chabazite

Abstract

In this study,The natural material  chabazite was investigated  for its ability to remove chromium(VI) from aqueous solution by batch adsorption experiments.. The effect of operating parameter pH on the adsorption was investigated.The influences of pH (3 to 11) have been reported at keeping constant conditions (Initial concentration=100 mg/L, agitation rate=200 rpm ,temperature = 298 K, contact time 120 min). The results show that adsorption of Cr (VI)   strongly depends on the pH of the solution,.The capacity of  adsorption of Cr(VI) increased at lower  pH'a The maximum adsorption capacity was obtained at pH 3.0. The maximum removal of Cr (VI) was found to be 5 mg/g.