Sains Malaysiana 44(7)(2015): 957–964

Dissolved and Suspended Particulate Metals in Setiu River Basin, Terengganu, Malaysia

(Logam Terlarut dan Partikulat Terampai di Lembangan Sungai Setiu, Terengganu, Malaysia)

M.K. KOH¹, S. SURATMAN¹ & N. MOHD TAHIR^1,2*

¹Institute of Oceanography & Environment, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu Darul Iman, Malaysia

²School of Marine Science and Environment, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu Darul Iman, Malaysia

Diserahkan: 26 September 2014/Diterima: 15 Februari 2015

ABSTRACT

Dissolved and suspended particulate metals (Al, Fe, Cd, Cu, Zn, Pb) in Setiu River basin, Terengganu which is situated at coastal area of southern South China Sea were investigated. The water samples were collected from nine stations from June 2007 to January 2008, in conjunction with the Southwest monsoon and Northeast monsoon. The average concentrations of dissolved Al, Fe, Cd, Cu, Zn and Pb were (μg L-1): 50±60, (2.0±3.4) ×102, 2.5±2.6, 3.0±1.4, 7.5±5.1 and 6.0±5.0, respectively. Meanwhile, the concentrations of suspended particulate metals were (μg g-1): (13±10)%, (10±13)%, 15±13, 65±94, (3.5±2.5) ×102 and (1.2±1.5) ×102, respectively. Seasonal variations of dissolved and suspended particulate metals were observed. The results were compared with selected Malaysian national rivers, world average and established guidelines. In addition, the enrichment of suspended particulate metals and the partitioning of metals between dissolved and suspended particulate phases were discussed.

Keywords: Dissolved and suspended particulate metal; enrichment factor; metal partition coefficient; Setiu River (Malaysia)

ABSTRAK

Logam terlarut dan partikulat terampai (Al, Fe, Cd, Cu, Zn, Pb) di lembangan Sungai Setiu, Terengganu yang terletak di perairan selatan Laut China Selatan telah dikaji. Sampel air telah diambil dari sembilan stesen dari Jun 2007 sehingga Januari 2008, bersesuaian dengan monsun Barat Daya dan Timur Laut. Kepekatan purata logam terlarut Al, Fe, Cd, Cu, Zn dan Pb masing-masing ialah (μg L-1): 50±60, (2.0±3.4) ×102, 2.5±2.6, 3.0±1.4, 7.5±5.1 dan 6.0±5.0. Sementara itu, kepekatan logam partikulat terampai masing-masing ialah (μg g-1): (13±10)%, (10±13)%, 15±13, 65±94, (3.5±2.5) ×102 dan (1.2±1.5) x102. Variasi bermusim untuk logam terlarut dan partikulat terampai telah diperhatikan. Hasil kajian telah dibandingkan dengan beberapa sungai yang terdapat di Malaysia, nilai purata kepekatan untuk dunia dan panduan piawai. Di samping itu, perkayaan untuk logam partikulat bersama-sama dengan pembahagian logam antara fasa terlarut dan partikulat terampai turut dibincangkan.

Kata kunci: Faktor perkayaan; logam terlarut dan partikulat terampai; pekali pembahagian logam; Sungai Setiu (Malaysia)

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*Pengarang untuk surat-menyurat; email: hayati@umt.edu.my