ACTA

Sorption of Lead on Na-Modified Transcarpathian Clinoptilolite

V.O. Vasylechko^{a, b}, G.V. Gryshchouk^a, Ya.M. Kalychak^a, R.E. Gladyshevskii^a, I.P. Navrotska^a, S.R. Bagday^a, A.V. Zelinskiy^a
^aIvan Franko National University of Lviv, 6 Kyryla and Mephodia Str., 79005 Lviv, Ukraine
^bLviv University of Trade and Economics, 9 Samchuka Str., 79011 Lviv, Ukraine

Full Text PDF

The sorption properties of the Na-modified Transcarpathian clinoptilolite towards Pb(II) were studied under dynamic conditions. It was noticed that Pb(II) was sorbed with the best efficiency on the uncalcined Na-clinoptilolite samples from the solutions with pH of 7.0. The maximal sorption capacity value of the Na-clinoptilolite towards Pb(II) is equal to 65 mg/g, which is 6.1 and 1.3 times higher than the sorption capacity value of the natural and acid-modified forms of this zeolite, respectively. Lead was quantitatively removed from the solid-phase extraction column with a 2.5 M HNO₃ solution. The solid-phase extraction procedure with Na-clinoptilolite was used for preconcentration of trace amounts of lead ions in aqueous solutions for their final determination by the atomic absorption method. The linearity of the proposed method was evaluated in the range of 0.06-15 ng/mL with a detection limit of 0.02 ng/mL.

DOI:10.12693/APhysPolA.141.328
topics: lead, sorption, Na-modified clinoptilolite, solid-phase extraction