Spatial and temporal variation on distributions of dissolved and particulate arsenic and mercury in Sungai Kuantan, Pahang = Perbezaan temporal dan reruang bagi taburan logam arsenik dan merkuri terlarut dan berpartikel di Sungai Kuantan, Pahang
It is important to monitor the concentration of toxic metals in the Sungai Kuantan as it serves many communities in terms of domestic, fisheries and agriculture purpose. In order to determine the distributions of dissolved and particulate As and Hg in Sungai Kuantan and evaluate its changes tempora...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Penerbit UKM
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/56851/ http://irep.iium.edu.my/56851/ http://irep.iium.edu.my/56851/ http://irep.iium.edu.my/56851/1/Fikriah%20Faudzi_2017.pdf http://irep.iium.edu.my/56851/7/56851_Spatial%20and%20temporal%20variation%20on%20distributions%20of%20dissolved_Scopus.pdf http://irep.iium.edu.my/56851/8/56851_Spatial%20and%20temporal%20variation%20on%20distributions%20of%20dissolved_WoS.pdf |
| Summary: | It is important to monitor the concentration of toxic metals in the Sungai Kuantan as it serves many communities in
terms of domestic, fisheries and agriculture purpose. In order to determine the distributions of dissolved and particulate As and Hg in Sungai Kuantan and evaluate its changes temporally and spatially, water samples were collected from the surface and bottom layers in a grid of 9 stations from estuary towards the upstream of Sungai Kuantan from May 2012 till October 2012. The dissolved metals were pre-concentrated using Chelex-100 while particulate metals were digested using Teflon bomb and subsequently were analyzed using ICP-MS. Dissolved As ranging from 4.650 to 36.894 µg L-1 while dissolved Hg ranging from BDL to 0.011 µg L-1. Particulate As and Hg varied from 0.650 to 86.087 mg L-1 and BDL to 5.873 mg L-1, respectively. Higher concentration of the dissolved elements were found mainly in October 2012 and particulate elements concentration mostly higher in May 2012. The source of the studied metals in the river may be the run-off from the effluent discharges and other natural sources. The toxic elements studied in Sungai Kuantan waters
were still below the Interim Marine Water Quality Standard (INWQS) permissible limits.
Pengawalan kepekatan logam toksik di Sungai Kuantan adalah penting kerana sungai tersebut menjadi tumpuan komuniti
daripada segi domestik, perikanan dan pertanian. Oleh itu, untuk mengenal pasti logam As dan Hg dalam fasa terlarut
dan pepejal terampai yang terdapat di Sungai Kuantan, sampel air di bahagian permukaan air dan di bahagian dasar
telah diambil di 9 stesyen bermula dari muara sungai hingga ke hulu sungai pada Mei 2012 sehingga Oktober 2012.
Logam terlarut telah dipekatkan menggunakan Chelex-100 manakala logam pepejal terampai dianalisis melalui proses
penghadaman Teflon Bomb. Logam surih kemudiannya dianalisis melalui Instrumen Spektrometri Jisim Gandingan
Plasma Teraruh (ICP-MS). Logam As terlarut berjulat daripada 4.650 hingga 36.894 µg L-1 manakala Hg terlarut berjulat
daripada BDL hingga 0.011 µg L-1. Logam As dan Hg fasa pepejal terampai masing-masing berjulat daripada 0.650
hingga 86.087 mg L-1 dan BDL hingga 5.873 mg L-1. Kepekatan unsur logam terlarut adalah tinggi pada Oktober 2012
dan logam pepejal terampai yang diperoleh adalah tinggi pada Mei 2012. Logam toksik di Sungai Kuantan berada di
bawah paras yang digariskan oleh Piawai Interim Kualiti Air Marin (IMWQS). |
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