Vf. Kurenkov et al., Color removal from water using praestol anionic and cationic flocculants in combination with aluminum sulfate as coagulant, RUS J AP CH, 73(2), 2000, pp. 269-273
Color removal from aqueous solutions containing humic substances by their s
uccessive treatment with Praestol flocculants and aluminum sulfate as coagu
lant was studied as influenced by such factors as the reagent amount, succe
ssion of introduction of coagulant and flocculant, nature of Praestol flocc
ulant (anionic or cationic), chemical composition and conformation of flocc
ulant macromolecule, and pH.