| dc.description.abstract | The rapid growth of industry in Surabaya can influence the pollution level, especially
heavy metal in the surface waters of Surabaya and the ecosystem around it; such as
river and marine. Finally, it will give negative impact to human being's health. The
objective of this research is to measure the content of some heavy metals which are
Hg, Cr, Cu, and Fe metal in the samples of river and sea water, river and sea
sediment, Eichhornia crassipes (Mart) Solmms , Rhizophora stylosa , fish Johnius
(Johnieops) borneensis, and fish Moolgarda delicates in 12 locations selected of
Surabaya surface waters. The method used to analyze the heavy metal are Neutron
Activation Analysis (NAA). Water sample, sediment and biota are refined,
homogenized, and radiated by neutron flux 1,05 x 10ˡˡn.cm-².det-ˡ during twelve
hours. Then they are identified by HPGe detector. The research shows that the
concentration of the heavy metals in river water does not exceed the thershold
according to Perda Surabaya City No. 02 year of 2004 for the IV level which are Hg
(0,005 ppm), Cr (1 ppm) and Fe (not regulated), except for drinking water usage. It
has Fe concentration which exceeds the threshold (0,3 ppm), Tengah Kali Surabaya
(1,1383 ppm) and Hulu Kali Wonokromo (0,4161 ppm). For sea water, most of the
locations have Hg and Cr concentrations which exceed the threshold according to
Kepmen LH No.51 year of 2004 for the biota Hg (0,001 ppm) and Cr (0,005 ppm).
The concentration of Hg for fish Johnius (Johnieops) borneensis and fish Moolgarda
delicates have exceeded the threshold according to Kep. Dirjen POM
No.03725/B/SK/VTI/89 about the maximum concentrasion of metal pollution in food.
Yet, the concentration of heavy metals in sediment, Eichhornia crassipes (Mart)
Solmms and Rhizophora stylosa are not regulate, so then heavy metals pollution can
be concluded . The concentrations of Hg, Cr, Cu, and Fe in the surface water are
smaller than the biota and it reaches the highest level in sediment. The sediment
distribution factor (Fd) is bigger than the biota bioaccumulation factor (Fb). As,
conclution that Hg, Cr, Cu, and Fetend to be precipitated.
Keywords: Neutron Activation Analysis (NAA), Hg, Cr, Fe, distribution
factor (Fd), bioaccumulation factor (Fb) | en_US |
