Influence of pH of the Medium on the Efficiency of Coagulants of Different Nature and their Biological Safety

The influence of pH of the medium on the residual concentration and degree of discoloration of model dye solutions under the action of polymeric organic and inorganic coagulants was investigated. The efficiency of coagulants application for water treatment processes is shown. The most promising reagent – decolorizing agent synthesized according to the method developed by the authors is established. The biotesting of the solution obtained after treatment with decolorizing agent of real wastewater of textile industries of Ivanovo region containing model dyes was carried out. It is concluded that the filtrate does not show acute lethal toxicity and is safe from the ecological point of view.