Fig. 4From: Influence of the interaction of calcium carbonate particles with surfactants on the degree of water pollution in small riversDynamics of ammonium (a) and nitrite (b) ion concentrations in the Isnovat River (October 2015) in the presence of CTMA, LS special, and their combination. 1—Reference sample. 2—10−5 mol/L CTMAB + LS. 3—10−5 mol/L CTMAB. 4—10−5 mol/L LSBack to article page