School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia.
Environ Sci Pollut Res Int. 2016 Sep;23(18):18451-65. doi: 10.1007/s11356-016-7023-4. Epub 2016 Jun 11.
Concentration activities of (210)Pb and (210)Po in the PM10 were determined to discuss their distribution and chemical behavior in relation to meteorological parameters especially in air mass transport during monsoon events. Marine aerosol samples were collected between January 2009 and December 2010 at the coastal region of Mersing, which is located in the southern South China Sea and is about 160 km northeast of Johor Bahru, as part of the atmosphere-ocean interaction program in Malaysia. About 47 PM10 samples were collected using the Sierra-Andersen model 1200 PM10 sampler over a 2-year sampling campaign between January 2009 and December 2010. Samples were processed using acid digestion sequential extraction techniques to analyze various fractions such as Fe and Mn oxides, organic matter, and residual fractions. While, (210)Pb and (210)Po activities were measured with the Gross Alpha/Beta Counting System model XLB-5 Tennelec® Series 5 and the Alpha Spectrometry (model Alpha Analyst Spectroscopy system with a silicon-surface barrier detector), respectively. The distribution activities of (210)Pb and (210)Po in the PM10 samples were varied from 162 to 881 μBq/m(3) with mean value of 347 ± 170 μBq/m(3) and from 85 to 1009 μBq/m(3) with mean value of 318 ± 202 μBq/m(3), respectively. The analysis showed that (210)Po activity in our samples lies in a border and higher range than global distribution values due to contributions from external sources injected to the atmosphere. The speciation of (210)Pb and (210)Po in marine aerosol corresponds to transboundary haze; e.g., biomass burning especially forest fires and long-range air mass transport of terrestrial dust has enriched concentrations of particle mass in the local atmosphere. The monsoon seems to play an important role in transporting terrestrial dust from Indo-China and northern Asia especially during the northeast monsoon, as well as biogenic pollutants originating from Sumatra and the southern ASEAN region during southwest monsoon events.
测定了 PM10 中（210）Pb 和（210）Po 的浓度活动，以讨论它们在与气象参数有关的分布和化学行为，特别是在季风事件期间的空气团传输。海洋气溶胶样本于 2009 年 1 月至 2010 年 12 月在位于南中国海的柔佛州新山东北约 160 公里的 Mersing 沿海地区收集，作为马来西亚大气-海洋相互作用计划的一部分。在 2009 年 1 月至 2010 年 12 月的两年采样期间，使用 Sierra-Andersen 模型 1200 PM10 采样器收集了约 47 个 PM10 样本。使用酸消解顺序提取技术处理样品，以分析各种分数，如 Fe 和 Mn 氧化物、有机物和残余分数。同时，使用 Gross Alpha/Beta Counting System 模型 XLB-5 Tennelec®Series 5 和 Alpha Spectrometry（带有硅表面势垒探测器的 Alpha Analyst Spectroscopy 系统）分别测量（210）Pb 和（210）Po 的活性。PM10 样品中（210）Pb 和（210）Po 的分布活性从 162 到 881 μBq/m3，平均值为 347±170 μBq/m3，从 85 到 1009 μBq/m3，平均值为 318±202 μBq/m3。分析表明，由于外部源注入大气而产生的贡献，我们的样品中的（210）Po 活性处于全球分布值的边界和较高范围内。海洋气溶胶中（210）Pb 和（210）Po 的形态与跨境烟雾相对应；例如，生物质燃烧，特别是森林火灾和陆地尘埃的长距离空气团传输，使当地大气中的颗粒质量浓度富集。季风似乎在从印度支那和北亚输送陆地尘埃方面发挥了重要作用，特别是在东北季风期间，以及源自苏门答腊和东南亚南部地区的生物源污染物在西南季风事件期间。
