Sains Malaysiana 39(6)(2010): 883–889

Kepekatan Logam di Tasik Bukit Merah, Perak

(Metal Concentrations in Bukit Merah Lake, Perak)

M. Shuhaimi-Othman*, A.K. Ahmad & G. Norziana

Pusat Pengajian Sains Sekitaran dan Sumber Alam, Fakulti Sains dan Teknologi

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

Diserahkan: 23 November 2009 / Diterima: 15 Mei 2010

ABSTRAK

Kajian kepekatan logam dalam air di Tasik Bukit Merah telah dijalankan pada April 2009. Lima belas stesen persampelan telah dipilih dan sampel air permukaan bagi penentuan logam telah diambil. Beberapa parameter kualiti air seperti suhu, konduktiviti, oksigen terlarut, pH dan keliatan air telah ditentukan di setiap stesen. Sebanyak 11 jenis logam iaitu kadmium, zink, plumbum, kuprum, nikel, ferum, kobalt, aluminium, barium, kromium dan mangan (Mn) telah ditentukan dalam sampel air. Keputusan menunjukkan kepekatan semua logam kajian berada di bawah kepekatan maksimum yang dicadangkan oleh piawaian Malaysia dan antarabangsa bagi melindungi hidupan akuatik kecuali bagi logam Fe dan Al. Bagi parameter kualiti air, kajian menunjukkan semua parameter berada dalam julat kepekatan semula jadi (kelas I) berdasarkan Piawaian Kualiti Air Kebangsaan (NWQS Malaysia) kecuali oksigen terlarut dan pH di beberapa stesen persampelan terutama di bahagian timur tasik yang didapati dipengaruhi oleh faktor-faktor semula jadi dan antropogenik.

Kata kunci: Air tawar; kualiti air; logam; Malaysia; tasik

ABSTRACT

Study on metal concentrations in water of Bukit Merah Lake was conducted in April 2009. Fifteen sampling stations were chosen and surface water samples for metals determination were collected. Some water quality parameters such as temperature, conductivity, dissolved oxygen, pH, and water hardness were determined at each station. Eleven metals i.e. cadmium, zinc, lead, copper, nickel, ion, cobalt, aluminium, barium, cromium dan manganese were determined in water samples. Results show that in general metals concentration were lower than maximum concentrations allowed by Malaysian and international standards in protecting aquatic life except for Fe and Al. For water quality parameters, study showed that all parameters are in natural concentration range (class I) according to National Water Quality Standard (NWQS Malaysia) except for dissolved oxygen and pH at some sampling stations especially at east side of the lake which were influenced by natural and anthropogenic factors.

Keywords: Freshwater; lake; metal; Malaysia; water quality

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*Pengarang untuk surat-menyurat; e-mail: shuhaimi@ukm.my