School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia; Analytical Chemistry Application Group (ACA), Waste and Environmental Technology Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor, Malaysia.
School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia.
Mar Pollut Bull. 2018 Dec;137:646-655. doi: 10.1016/j.marpolbul.2018.11.006. Epub 2018 Nov 14.
In this study, concentrations of heavy metals, rare earth elements (REEs), Uranium (U) and Thorium (Th) of the actinide group were determined from Linggi estuary sediment samples by neutron activation analysis (NAA) and inductive coupled plasma - mass spectrometry techniques. The geo-accumulation (I) and ecological risk index (Ri) values were calculated to identify the quality status of Linggi estuary sediments. Results indicated Linggi estuary was polluted by arsenic (As), lead (Pb) and antimony (Sb). REEs, U and Th showed significant increase of concentration in Linggi estuary sediments. Ri of Linggi estuary was categorised as low to considerable ecological risk, which indicates no significant to moderate effect on the majority of the sediment-dwelling organisms. Correlation matrix and principal component analysis assessed pollution sources to be both natural and anthropogenic.
本研究采用中子活化分析（NAA）和电感耦合等离子体质谱技术（ICP-MS），测定了林吉河口沉积物样品中重金属、稀土元素（REEs）、铀（U）和钍（Th）的浓度。通过计算地质累积指数（I）和生态风险指数（Ri），来识别林吉河口沉积物的质量状况。结果表明，砷（As）、铅（Pb）和锑（Sb）污染了林吉河口。林吉河口沉积物中 REEs、U 和 Th 的浓度显著增加。林吉河口的 Ri 被归类为低到中等生态风险，这表明对大多数栖息在沉积物中的生物没有显著到中等程度的影响。相关矩阵和主成分分析评估了污染来源，既有自然的也有人为的。
