Salam, Abdul Kadir and Helmke, Philip A. (1995) Measurement of Free Ionic Activities of Heavy Metals in Soil Solution Using Donnan Analysis. Jurnal Ilmiah Ilmu-Ilmu Pertanian, 3 (1). pp. 13-19. ISSN 0854-7394


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The Activity of free ionic form of dissolved metals is an important soil solution variable for evaluating the behavior of heavy metals in soil-water-plant system. This experiment measured the activities of free ionic heavy metal experimentally using donnan analytical technique. Sample solution (standard solution or soil extract) was equilibrated.with a pure acceptor solution of equal ionic strength to the donor’s (sample solution) through a sheet of donnan ion-exchange membrane. Only positively charged ions passed through the membrane. After the donnan equilibrium was reached, the activities of free metal ions in the acceptor solution equaled to the activities of the free ionic dissolved metals in the sample solution (donor solution) and were measured with graphite furnace AAS. The results show that this technique can measure the activities of free metal ions in natural water system satisfactorily.

Item Type: Article
Uncontrolled Keywords: Free Ions, Cadmium, Copper, Donnan Analysis, Heavy Metals
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Abdul Kadir Salam
Date Deposited: 26 Apr 2018 03:53
Last Modified: 26 Apr 2018 03:53

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