Fig. 5From: 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 in the presence of CTMA, LS, and CaCO3 nanoparticles. 1—Reference sample. 2—10−5 mol/L LS. 3—10−5 mol/L CTMAB + CaCO3. 4—10−5 mol/L LS + CaCO3 Back to article page