Availability of heavy metal concentration in soil around the oil palm (elaeis guineensis) plantation / Rubaiyah Alias

Four heavy metals (Cu, Zn, Pb and Ni) in nine different soil sampling
point at oil palm (Elaeis guineensis) plantation were determined by
Inductively Coupled Plasma - Optical Emission Spectrometry after wet
digestion. This study focus for a number of heavy metals (Cu, Zn, Pb and
Ni) that most commonly found at contaminated sites. The ranges of
element concentrations for copper, zinc, lead and nickel were 0.76 - 2.00,
0.19 - 1.58, 0.07 - 0.22, and 0.01 - 0.05 mg/kg respectively. Copper
content was higher than other metals in all soil samples. The concentration
of heavy metals in soil show the following decreasing trend: Cu > Zn > Pb
> Ni. All of the metal content level were below than permissible limit that
recommended by World Health Organization. The Contamination Factor
(CF) value was less than 6 for all heavy metal in nine different soil
samples that supposedly not higher contaminated. All soil samples had goo
accumulation index (Igeo) less than 2 that consider as uncontaminated.
This generally indicate that the soil at oil palm plantation not totally
consider as toxicity.