01 I Nurrachmi et al. / Maspari Journal 02 (2011) 01-10
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Received 21 September 2010
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Determination of heavy metal concentrations (Cd, Cu, Pb and Zn) in different parts (muscle,
bone, scale, intestine, gills and fin) of a croacker fish (S. russelli) collected from Dumai coastal waters
were carried out during May to July 2009. The concentration of each metal was determined by
AtomicAbsorption Spectrophotometer Perkin Elmer 3110 in the Marine Chemistry Laboratory,
Marine Science Department University of Riau Pekanbaru. The results showed that Zn was found to
be the highest concentrations in most of the fish body parts analyzed followed by Pb, Cu and Cd in
both samples from the western and eastern regions of Dumai coastal waters. In general, the
concentrations of all metals analyzed in the present study were higher in fish collected from the
eastern region of Dumai coastal waters where more anthropogenic activities such as industries and
human habitations along the coastal area were found. The concentration of heavy metals observed
were Cd: 0.098 – 0.103, 0.189 – 0.283, 0.099 – 0.289, 0.107 – 0.302, 0.182 – 0.377 and 0.118 – 0.397;
Cu: 0.130 – 0.198, 0.189 – 0.341, 0.082 – 0.073, 0.132 – 0.285, 0.520 – 0.746 and 0.175 – 0.337; Pb:
3.979 – 4.109, 4.144 – 4.601, 0.970 – 2.527, 2.853 – 4.367, 5.053 – 7.074 and 4.637 – 6.262 and Zn:
5.713 – 5.755, 7.956 – 8.558, 4.649 – 6.232, 5.730 – 7.745, 8.988 – 11.115 and 8.777 – 10.686 8g/g for
muscle, bone, scale, intestine, gills and fins respectively. Concentrations of heavy metals in each body
part of the fish were as follow: fin > gills > intestine > scale > bone > muscle for Cd; gills > bone > fin
> intestine > muscle > scale for Cu; gills > Fin > bone > intestine > muscle > scale for Pb and gills > fin
> bone > intestine > scale > muscle for Zn. The concentrations of heavy metals in muscle were lower
than other analyszed organs in the present study and this was considered to be an advantageous from
the human health points of view as because muscle constitute the greatest mass of the fish that is
consumed.
I. PENDAHULUAN
Perairan laut Dumai merupakan salah
satu perairan di Sumatera yang padat dengan
aktivitas pelayaran dan di pesisir pantainya
banyak terdapat aktivitas industri dan
pemukiman penduduk. Padatnya aktivitas
pelayaran dan perindustrian di sekitar
perairan Dumai serta masuknya limbah
domestik melalui sungai akan mengakibatkan
menurunnya kualitas perairan dan timbulnya
pencemaran. Hal seperti ini akan memberikan
ancaman yang serius terhadap terganggunya
keseimbangan ekosistem perairan dan
kehidupan biota perairan. Amin et al. (2009)
menyatakan bahwa konsentrasi logam berat
pada sedimen di perairan pantai Dumai
secara umum masih dapat diklasifikasikan
sebagai perairan yang belum tercemar sampai
dengan tercemar sedang. Namun demikian
kandungan logam berat yang lebih tinggi
diketahui dijumpai pada kawasan yang dekat
dengan daerah industri dan pusat kota.
Logam berat dalam perairan menjadi masalah
yang serius karena sifat toksiknya dan
mempunyai kecenderungan untuk
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