Acetic acid and aqueous chromium sulfate are made by waste chromic paste, which came from production of pregnenolone, acetate with steroid saponin, adopting new recorery technology.

Application of plant biomass in purification of wastewater containing chromium;

Coagulation-microfiltration process for the treatment of wastewater containing chromium;

Treatment of wastewater containing chromium fromlaboratory by ferrite-centrifugation technology;

Study on the treatment of chromium-containing wastewater by sulphonated peat coal;

Pretreatment of chromium-containing wastewater with steel slag and solidification of waste steel slag and chromium residue;

Research on the adsorptive treatment of chromium-containing wastewater by active carbon;

It is discussed that the method on treating waste water containing chromium by different kinds of peat.

Based the relevant literature,the progress of treatment of waste water containing chromium by ion-exchange method and adsorption method was analyzed, and some advise and emphases in the field of research for the two methods application to treat chromium-containing wastewater were put forward.

The nationally ecological security was faced with enormous threat by the discharge chromium residue, which was over one hundred thousand tons annually for the current discharge and 3.

After concentrating the waste liquid contained with Chromium, filtrate the sediment under weal alkalinity condition and the sediment should be filtrated again and under the acid condition after legating, dissolving and oxidizing.