Study on absorption of by Chinese cabbage slag to Cr6+

In order to reduce heavymetal pollution in the waste water, this study took cabbage slag as research subject and discussed effects of adsorption of cabbage slag to Cr6+ using quadratic regression orthogonal rotating combination design. The research results showed that, the optimal absorption condition of cabbage slag absorbing Cr6+ depends on the premise of 50 ml Cr6+ solution, with a additive cabbage slag amaunt of 0.1 g, the initial Cr6+ concentration was 10 mgL-1, time was 5 h, pH 5, temperature 70 ℃, the maximum adsorption rate was 99.73%; The adsorption mechanism of cabbage slag to Cr6+ could be better illustrated by the Freundlich adsorption isotherm as well as the secondary dynamic models,which indicates that the absorption is multimolecular layer adsorption and mixed absorption.