The impact of SAS on the electroflotanional extraction process of chromium hydroxides from industrial production drainage waters
The peculiarities of the impact of surface-active substances (SAS) of different nature on the process of extracting electroflotational chromium hydroxide are defined. The presence of anionic surface active agents of sodium dodecyl sulfate benzene sulfonate in the streamflows leads to increase in the degree of chromium (III)extraction up to 90-98%, and extends the pH working time interval from 6.5 to 8.0. Cationic SAS increases the efficiency of chromium hydroxide (III) extraction only in an alkaline environment at pH 10-11 (extraction rate can reach 99% at current density of 0.6-0.8 A / l). Nonionic SAS makes the process of chromium hydroxide extraction more difficult.