Salam, Abdul Kadir and Djuniwati, Sri and Sarno, - and Sriyani, Nanik and Novpriansyah, Hery and Septiana, Alia and Putera, Helmi D. (1997) The DTPA-Extractable Heavy Metals in Tropical Soils Treated With Lime Materials. Indonesian Journal of Tropical Agriculture, 8 (1). pp. 6-12. ISSN 0852-5927

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Abstract

Soils are prone to pollution by heavy metals from various sources, but their capacities to immobilize heavy metals are limited. This research was intended to study the influence of some lime materials on the extractability of some heavy metals in soils. Tropical soils (Oxisols, Ultisols, and Alfisols), collected from Lampung, Indonesia, were used. The soil samples (air-dry, 2-mm sieved) were spiked with a standard solution containing Cu, Cd, Zn, and Mn and treated independently with lime materials (CaCO3, Ca(OH)2, or CaMg(CO3)2) to bring the soil pH about 2 units higher. The soluble heavy metals were extracted with DTPA and determined with flame AAS after an 8-week incubation at the soils’ field moisture capacities. The results showed that in the soils not spiked with heavy metals, at all time, these materials significantly decreased the extractable Cu, Cd, Zn, and Mn in a negative relation with the changes in soil pHs, increased with lime additions. The extractable heavy metals in soils spiked with heavy metals were significantly higher than those in the soils not spiked with heavy metals, but the effect of lime in lowering the extractable heavy metals was also clearly observed. The extractable heavy metals were generally higher in soil treated with CaMg(CO3)2 than in soils treated with CaCO3 or Ca(OH)2, probably because of the effect the Mg ions in displacing the metal cations from soil adsorption surfaces. The degree of recovery of heavy metals suggested that parts of the heavy metals added were strongly adsorbed by the soils. Based on the percent recovery values, the order of the soil adsorption capacities with respect to Cu, Cd, and Zn followed the order of: Alfisols > Oxisols > Ultisols. The soil preference towards the heavy metals generally followed the order of: Cu > Cd > Zn.

Item Type: Article
Uncontrolled Keywords: Heavy Metals, Manganese, Copper, Zinc, Cadmium, Lime, Tropical Soils
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Abdul Kadir Salam
Date Deposited: 25 Apr 2018 08:45
Last Modified: 25 Apr 2018 08:45
URI: http://repository.lppm.unila.ac.id/id/eprint/6516

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