ESTIMATION OF THE INFLUENCE OF ADSORBENT MODIFICATION ON THE EFFICIENCY OF ADSORPTION OF HEAVY METALS EFFECTING THE QUALITY OF NATURAL WATER
Article is devoted to estimation of a natural diatomite modification type influence on adsorption quality which is in this case an adsorption layer volume A∞. For comparison with wild type available modifications were used including thermal, acidic and alkaline. As a model sorbate Cu(NO3)2 standard water solutions were used. Adsorption was conducted during short (1 hour) and long (24 hours) term periods. Linear model С/А = f(C) considering sorbent modification type gives statistically significant regression coefficients for acidic and alkaline diatomite modification for short term adsorption comparing with native sorbent (kH = -0.772211, pH = 0.0133, kOH = -0.679906, pOH = 0.0298). Comparison of regression coefficients samples for acidic and alkaline diatomite in confidential intervals’ limits reveals statistically significant differences between coefficients. Thus alkaline modification of diatomite significantly increases quality of short term adsorption of a model adsorbent.