Details

Autor(en) / Beteiligte

• Minkina, T. M.
• Pinskii, D. L.
• Mandzhieva, S. S.
• Bauer, T. V.
• Batukaev, A. A.
• Sushkova, S. N.
• Sherstnev, A. K.
• Bakoev, S. U.

Titel

Desorption of Exchangeable Cations at Adsorption of Lead Ions by Chernozem in the Presence of Attendant Anions

Ist Teil von

• American journal of environmental sciences, 2015-10, Vol.11 (5), p.325-332

Erscheinungsjahr

2015

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The effect of Cl super( -), Ac super( -) and NO sub( 3) super( -) anions on the adsorption of Pb cations by an ordinary chernozem and desorption of exchangeable cations in the soil-solution system has been assessed under model laboratory conditions. It has been shown that, the attendant anions affect the shape of the adsorption isotherms, which are described by the Langmuir equation. The greatest influence on the affinity constant of Pb with soil has anion Ac super( -). It has been found that the uptake of the Pb cations by chernozem from solutions of different salts is accompanied by the displacement of the exchangeable cations to the solution in the following order: Ca super( 2+) > Mg super( 2+) > Na super( +) > K super( +). The sum of the displaced exchangeable cations in most cases exceeds the amount of the adsorbed metal cations. The content of Pb cations desorbed by the ammonium acetate buffer solution makes up 6%-39% of the total Pb adsorbed cations.