Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]

Dangli Waters ecosystem is located at the north of Langkawi UNESCO Global Geopark. Apparently, this area is currently experiencing a significant deterioration of marine habitat. Therefore, 14 stations were set up in this study area to investigate the sediment for metal c...

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Published in:Sains Malaysiana
Main Author: Mokhtar M.; Tajam J.; Wagiman S.
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2019
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062296895&doi=10.17576%2fjsm-2019-4801-06&partnerID=40&md5=d6b965da51986c1a12d6a92ad2721f80
id 2-s2.0-85062296895
spelling 2-s2.0-85062296895
Mokhtar M.; Tajam J.; Wagiman S.
Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
2019
Sains Malaysiana
48
1
10.17576/jsm-2019-4801-06
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062296895&doi=10.17576%2fjsm-2019-4801-06&partnerID=40&md5=d6b965da51986c1a12d6a92ad2721f80
Dangli Waters ecosystem is located at the north of Langkawi UNESCO Global Geopark. Apparently, this area is currently experiencing a significant deterioration of marine habitat. Therefore, 14 stations were set up in this study area to investigate the sediment for metal contents discharged into Dangli Waters using the ecological risk assessment. The sediment samples were collected during four seasons, namely South West Monsoon, First Inter Monsoon, North East Monsoon and Second Inter Monsoon. The spatial distribution pattern of heavy metals in sediment was properly determined as well as the seasonal variation of the contamination. From the results obtained, the average concentration of each heavy metal distributed in the surface sediment of Dangli Waters can be written in decreasing order as Fe>Cr>As>Co>Cd. From the observation, heavy metal concentrations of As was recorded the most higher profiles near to the cement plant production area. Meanwhile, for the pattern of seasonal changes, FIM season was defined as the season with higher concentrations of all metals in the surface sediment compared to other seasons. This is due to highly rainfall distribution and water runoff during this period, leading an increase of sediment deposition into the Dangli Waters. According to the contamination factor (C f ) for each metal, it was shown that some heavy metals such as As were at a risky level with the C f value was higher than 6 (C f >6). However, the degree of contamination (C d ) for each station was classified as moderate (7 ≤ C d < 14), except for ST2 which showed a low degree of contamination. © 2019 Penerbit Universiti Kebangsaan Malaysia. All rights reserved.
Penerbit Universiti Kebangsaan Malaysia
1266039
English
Article
All Open Access; Gold Open Access
author Mokhtar M.; Tajam J.; Wagiman S.
spellingShingle Mokhtar M.; Tajam J.; Wagiman S.
Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
author_facet Mokhtar M.; Tajam J.; Wagiman S.
author_sort Mokhtar M.; Tajam J.; Wagiman S.
title Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
title_short Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
title_full Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
title_fullStr Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
title_full_unstemmed Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
title_sort Determination of the sediment contamination level in dangli waters of Langkawi UNESCO Global Geopark, Kedah, Malaysia; [Pengenalpastian tahap pelumusan sedimen di perairan dangli di langkawi Unesco global geopark, Kedah, Malaysia]
publishDate 2019
container_title Sains Malaysiana
container_volume 48
container_issue 1
doi_str_mv 10.17576/jsm-2019-4801-06
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062296895&doi=10.17576%2fjsm-2019-4801-06&partnerID=40&md5=d6b965da51986c1a12d6a92ad2721f80
description Dangli Waters ecosystem is located at the north of Langkawi UNESCO Global Geopark. Apparently, this area is currently experiencing a significant deterioration of marine habitat. Therefore, 14 stations were set up in this study area to investigate the sediment for metal contents discharged into Dangli Waters using the ecological risk assessment. The sediment samples were collected during four seasons, namely South West Monsoon, First Inter Monsoon, North East Monsoon and Second Inter Monsoon. The spatial distribution pattern of heavy metals in sediment was properly determined as well as the seasonal variation of the contamination. From the results obtained, the average concentration of each heavy metal distributed in the surface sediment of Dangli Waters can be written in decreasing order as Fe>Cr>As>Co>Cd. From the observation, heavy metal concentrations of As was recorded the most higher profiles near to the cement plant production area. Meanwhile, for the pattern of seasonal changes, FIM season was defined as the season with higher concentrations of all metals in the surface sediment compared to other seasons. This is due to highly rainfall distribution and water runoff during this period, leading an increase of sediment deposition into the Dangli Waters. According to the contamination factor (C f ) for each metal, it was shown that some heavy metals such as As were at a risky level with the C f value was higher than 6 (C f >6). However, the degree of contamination (C d ) for each station was classified as moderate (7 ≤ C d < 14), except for ST2 which showed a low degree of contamination. © 2019 Penerbit Universiti Kebangsaan Malaysia. All rights reserved.
publisher Penerbit Universiti Kebangsaan Malaysia
issn 1266039
language English
format Article
accesstype All Open Access; Gold Open Access
record_format scopus
collection Scopus
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