A total of 97 surficial sediment samples were collected from the Kelantan River, Pahang River and offshore water of Peninsular Malaysia located in the east coast mainly in to investigate the sources and sinks of ²¹⁰Pb in the southern South China Sea region. At the locations studied, the concentration activity of ²¹⁰Pb was recorded from the Kelantan River (n = 28), Pahang River (n = 44) and offshore waters (n = 25), ranging from 2.7 ± 0.46 Bq/kg to 52.07 ± 5.23 Bq/kg, 8.65 ± 3.56 Bq/kg to 83.04 ± 6.71 Bq/kg, and 6.72 ± 2.92 Bq/kg to 42.2 ± 3.94 Bq/kg, respectively. Both riverine systems received huge amounts of ²¹⁰Pb concentrations via mobilised particulate matter, where erosional igneous rocks and weathered sedimentary layers were prominent in elevating the amount of ²¹⁰Pb from the source towards the sinks. In the offshore margins, the concentrations differed according to the source. As both rivers move towards the sinks in the coastal territories, boundary scavenging becomes prominent. In the offshore territories, a deficiency of ²¹⁰Pb leads to excess ²²⁶Ra in the water column. Scavenged nuclide imported from several sources may increase the total concentrations lingering in the offshore waters of Peninsular Malaysia. Particulate matter mobilised from several sources via upwelling or downwelling in the bottom current through lateral transport further enhances the removal of particle-reactive nuclides from the water column. At the same time, atmospheric deposition via precipitation and transboundary mobilisation of aerosol by mineral dust may increase the total flux on the offshore waters of Peninsular Malaysia.

总共从位于东海岸的吉兰丹河，彭亨河和马来西亚半岛的近海水中收集了97个表面沉积物样本，主要用于调查南海南部地区²¹⁰ Pb的来源和汇。在研究的地点，吉兰丹河（n = 28），彭亨河（n = 44）和近海水（n = 25）记录了²¹⁰ Pb的浓度活动，范围为2.7±0.46 Bq / kg至52.07±分别为5.23 Bq / kg，8.65±3.56 Bq / kg至83.04±6.71 Bq / kg和6.72±2.92 Bq / kg至42.2±3.94 Bq / kg。两个河流系统都收到了²¹⁰笔巨额款项通过动员的颗粒物（在火成岩和风化的沉积层中）引起的Pb浓度显着升高，从源头到水槽的Pb含量提高了²¹⁰ Pb。在近海边缘，浓度根据来源而有所不同。当两条河流都流向沿海领土的汇点时，边界清扫变得尤为重要。在近海地区，缺乏²¹⁰ Pb会导致过量²²⁶Ra在水柱中。从数个来源进口的清除核素可能会增加马来西亚半岛近海中残留的总浓度。通过横向输送在底部流中通过向上流动或向下流动从多个来源动员的颗粒物质进一步增强了从水柱中去除颗粒反应性核素的能力。同时，通过降水和矿物尘跨越气溶胶的大气沉积可能会增加马来西亚半岛近海的总通量。