Abstract:
Landasan Ulin is a center for vegetable production, and it has an important role in producing vegetables for the city of
Banjarbaru. Agricultural soil in this study was assessed for heavy metal contamination using the geoaccumulation index (Igeo),
contamination factor (Cf
i
), the degree of contamination (Cd
), the degree of modified contamination (mCd
), and the Pollution
Load Index (PLI) as well as magnetic susceptibility. Samples were collected from topsoil and analyzed using magnetic
susceptibility and Atomic Absorption Spectrophotometer (AAS). The average concentration of heavy metals in the sampling
area A is Fe>Zn>Mn>Cu>Hg, and the area B is Fe>Mn>Zn>Cu>Hg. Magnetic susceptibility values in area A is higher than
in area B and the value of magnetic susceptibility can be used as a proxy for monitoring heavy metal concentrations, especially
Zn in this area. Zn and Cu exceeded the threshold set by the Indonesian Standards Institute. Igeo results show that the research
area is moderately contaminated with Cu, Zn, and Hg. According to Cf
i
, the soil was classified as low contaminated with Fe,
Zn, Cu, Mn, and Hg, as well as Cd and mCd. The PLI results show that in both area, drastic corrective action is not required.
Keywords: geoaccumulation index, contamination factor, contamination degree, pollution load index
