Laboratory for Coast and Ocean Geology, Third Institute of Oceanography (TIO), State Oceanic Administration of China, Xiamen 361005, China.
Institute of Oceanography and Earth Science (IOES), University of Malaya, Kuala Lumpur 50603, Malaysia; Institute of Biological Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia.
Mar Pollut Bull. 2017 Dec 15;125(1-2):492-500. doi: 10.1016/j.marpolbul.2017.08.010. Epub 2017 Aug 12.
To understand the source-to-sink of pollutants in the Kelantan River estuary and the adjacent shelf area in Malaysia, a total of 42 surface sediment samples were collected in the Kelantan River-estuary-shelf system to analyze for grain size, total organic carbon (TOC) content, Al and heavy metals (Cr, Ni, Cu, Zn, Cd and Pb). The surficial sediments were mainly composed of clayey silt and the TOC content in sediments decreased from the river to the shelf. The surficial sediments experienced Pb pollution; Cr only showed a certain level of pollution in the coastal area of the estuary but not in other areas, and Ni, Cu, Zn, and Cd showed no pollution. The heavy metals mainly originated from natural weathering and erosion of rocks and soils in the catchment and enriched near the river mouth. Total organic carbon can promote the enrichment of heavy metals in sediments.
为了了解马来西亚吉兰丹河口及邻近陆架区污染物的源-汇过程，在吉兰丹河-河口-陆架系统中共采集了 42 个表层沉积物样品，分析了粒径、总有机碳（TOC）含量、Al 和重金属（Cr、Ni、Cu、Zn、Cd 和 Pb）。表层沉积物主要由粘粉质淤泥组成，沉积物中的 TOC 含量从河流向陆架逐渐减少。表层沉积物受到 Pb 污染；Cr 仅在河口沿海地区表现出一定程度的污染，而在其他地区则没有，Ni、Cu、Zn 和 Cd 则没有污染。重金属主要来源于流域岩石和土壤的自然风化和侵蚀，并在河口附近富集。总有机碳可以促进重金属在沉积物中的富集。
