Fig. 6From: Influence of the interaction of calcium carbonate particles with surfactants on the degree of water pollution in small riversDynamics of ammonium (a) and nitrate (b) ion concentrations in the Bic and Nistru Rivers in natural samples. 1—Nistru River upstream Bic River. 2—Bic River watering place in Nistru River. 3—Nistru River 200 m downstream of Bic RiverBack to article page