VERTICAL PROFILE OF SELECTED METALS CONCENTRATION IN SEDIMENT OF FORMER TIN MINING LAKE[1]
(PROFILE MENEGAK KEPEKATAN LOGAM TERPILIH DIDALAM SEDIMEN TASIK BEKAS LOMBONG)
Zaharidah Abu Bakar 1, Abd. Khalik Wood2, Ahmad Saat1, Zaini Hamzah1 and, Nazaratul Ashifa Abdullah Salim2
1Faculty of Applied Sciences, Universiti Teknologi MARA Malaysia
40450 Shah Alam Selangor, Malaysia.
2Malaysian Nuclear Agency, 43600 Bangi Selangor, Malaysia.
Abstract
Increasing of interest on metals contaminant in the sediment lakes was due to the fact that sediment can act as sink and storage of heavy metals. Profile of metal elements against sediment depth enables us to obtain valuable information about environmental and deposition of contamination in that area. In the present study sediment cores were sampled from ex-tin mining lake in Perak. Ex-tin mining lakes were suspected to have higher concentration of anthropogenic toxic metals in sediment due to past mining activities. The objective of study was to confirm contamination of metals in a former tin mining sediment lake. Sediment cores were analyzed using Instrumental Neutron Activation Analysis (INAA) technique to determine concentration of Al, As, Co, Cr and Mn in the sediment core. The results showed range of metal concentration and mean value in vertical profile for Al, As, Co, Cr, and Mn were 12.8% - 15.46% (13.92%), 42.12 - 58.98 (48.72) ppm, 10.17 - 11.82 (10.82) ppm, 35.52 – 42.65 (38.62) ppm and 393.28 - 618.11 (500.80) ppm respectively. While, the enrichment factor (EF) value was employed to estimate the degree of contaminant in the sediment lake. Result for enrichment factor (EF) for As, Co, Cr and Mn were 16.10, 0.51, 0.31 and 0.18 respectively. The result depicted only As was showed high EF value and anthropogenic influence in the lake sediment as compared to Co, Cr and Mn.
Abstrak
Peningkatan minat terhadap pencemaran logam toksk didalam sediment tasik adalah disebabkan keupayaan sedimen bertindak sebagai singki dan penyimpan logam toksik. Profil logam toksik bertentangan kedalaman membolehkan kita memperolehi maklumat berharga tentang persekitaran dan mendapan pencemaran di kawasan tersebut. Didalam kajian ini sampel turus sedimen telah diambil dari tasik bekas lombong di Perak. Sediment bekas tasik lombong disyaki mengandungi kepekatan logam toksik berbahaya disebabkan oleh aktiviti-aktiviti perlombongan yang lalu. Objektif kajian ini ialah untuk mengesahkan pencemaran logam didalam tasik bekas lombong. Turus sediment telah dianalisa dengan menggunakan teknik analisa pengaktifan neutron (INAA) digunakan untuk menentukan kepekatan Al, As, Co, Cr dan Mn. Hasil analisis untuk profil menegak menunjukkan julat kepekatan logam dan nilai purata untuk Al, As, Co, Cr dan Mn masing-masing ialah 12.8% - 15.46% (13.92%), 42.12 - 58.98 (48.72) ppm, 10.17 - 11.82 (10.82) ppm, 35.52 – 42.65 (38.62) ppm and 393.28 - 618.11 (500.80) ppm. Manakala, nilai faktor pengayaan (EF) telah digunakan untuk menganggarkan darjah pencemaran didalam sedimen tasik. Hasil analisa menunjukkan untuk faktor pengayaan (EF) untuk As, Co, Cr dan Mn masing-masing 16.10, 0.51, 0.31 and 0.18. Hasil keputusan menunjukkan hanya As telah menunjukkan nilai EF yang tinggi berbanding dan pengaruh antropogenik didalam sedimen tasik barbanding Co, Cr dan Mn.
[1] Presented at Nuclear Malaysia Internal Seminar 2008, Bangi, Malaysia
(PROFILE MENEGAK KEPEKATAN LOGAM TERPILIH DIDALAM SEDIMEN TASIK BEKAS LOMBONG)
Zaharidah Abu Bakar 1, Abd. Khalik Wood2, Ahmad Saat1, Zaini Hamzah1 and, Nazaratul Ashifa Abdullah Salim2
1Faculty of Applied Sciences, Universiti Teknologi MARA Malaysia
40450 Shah Alam Selangor, Malaysia.
2Malaysian Nuclear Agency, 43600 Bangi Selangor, Malaysia.
Abstract
Increasing of interest on metals contaminant in the sediment lakes was due to the fact that sediment can act as sink and storage of heavy metals. Profile of metal elements against sediment depth enables us to obtain valuable information about environmental and deposition of contamination in that area. In the present study sediment cores were sampled from ex-tin mining lake in Perak. Ex-tin mining lakes were suspected to have higher concentration of anthropogenic toxic metals in sediment due to past mining activities. The objective of study was to confirm contamination of metals in a former tin mining sediment lake. Sediment cores were analyzed using Instrumental Neutron Activation Analysis (INAA) technique to determine concentration of Al, As, Co, Cr and Mn in the sediment core. The results showed range of metal concentration and mean value in vertical profile for Al, As, Co, Cr, and Mn were 12.8% - 15.46% (13.92%), 42.12 - 58.98 (48.72) ppm, 10.17 - 11.82 (10.82) ppm, 35.52 – 42.65 (38.62) ppm and 393.28 - 618.11 (500.80) ppm respectively. While, the enrichment factor (EF) value was employed to estimate the degree of contaminant in the sediment lake. Result for enrichment factor (EF) for As, Co, Cr and Mn were 16.10, 0.51, 0.31 and 0.18 respectively. The result depicted only As was showed high EF value and anthropogenic influence in the lake sediment as compared to Co, Cr and Mn.
Abstrak
Peningkatan minat terhadap pencemaran logam toksk didalam sediment tasik adalah disebabkan keupayaan sedimen bertindak sebagai singki dan penyimpan logam toksik. Profil logam toksik bertentangan kedalaman membolehkan kita memperolehi maklumat berharga tentang persekitaran dan mendapan pencemaran di kawasan tersebut. Didalam kajian ini sampel turus sedimen telah diambil dari tasik bekas lombong di Perak. Sediment bekas tasik lombong disyaki mengandungi kepekatan logam toksik berbahaya disebabkan oleh aktiviti-aktiviti perlombongan yang lalu. Objektif kajian ini ialah untuk mengesahkan pencemaran logam didalam tasik bekas lombong. Turus sediment telah dianalisa dengan menggunakan teknik analisa pengaktifan neutron (INAA) digunakan untuk menentukan kepekatan Al, As, Co, Cr dan Mn. Hasil analisis untuk profil menegak menunjukkan julat kepekatan logam dan nilai purata untuk Al, As, Co, Cr dan Mn masing-masing ialah 12.8% - 15.46% (13.92%), 42.12 - 58.98 (48.72) ppm, 10.17 - 11.82 (10.82) ppm, 35.52 – 42.65 (38.62) ppm and 393.28 - 618.11 (500.80) ppm. Manakala, nilai faktor pengayaan (EF) telah digunakan untuk menganggarkan darjah pencemaran didalam sedimen tasik. Hasil analisa menunjukkan untuk faktor pengayaan (EF) untuk As, Co, Cr dan Mn masing-masing 16.10, 0.51, 0.31 and 0.18. Hasil keputusan menunjukkan hanya As telah menunjukkan nilai EF yang tinggi berbanding dan pengaruh antropogenik didalam sedimen tasik barbanding Co, Cr dan Mn.
[1] Presented at Nuclear Malaysia Internal Seminar 2008, Bangi, Malaysia
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