Study of the adsorption of heavy metal ions from binary and multicomponent solutions by ceramic chips

Abstract

The adsorption of heavy metal ions from binary solutions was studied using Co (II) as an example in the concentration range from 1 to 50 mg/dm3 and the adsorption of heavy metal ions from multicomponent solutions using Co (II), Ni (II) and Cu (II) by fractions of ceramic chips of 0.5-1.0 mm and 1.0-2.0 mm. It was established that the value of the ultimate saturation of Co (II) ions with ceramic chips depends on the pH value. The maximum value of the ultimate saturation for Co (II) ions is reached at pH = 9, the smallest – at pH = 3. An increase in temperature from 273 to 353 K leads to an increase in the ultimate saturation for Co (II) ions. Experimental data on the sorption of metal ions from multicomponent solutions show that the rate of achievement of the ultimate saturation of the sorbent in a metal depends on the value of the ionic radius. The ultimate saturation limit for a metal at the same concentration of metals and the presence of other metals is greatest for Cu (II), the smallest for Co (II). The results of the study indicate the high efficiency of ceramic chips as a sorbent of heavy metal ions from wastewater of various industries, which indicates the possibility of practical use of ceramic chips for wastewater treatment from heavy metals, especially taking into account the availability and the possibility of using it without regeneration with recycling in production pigments.