Radiocarbon Concentration Measurements in Tree Leaves near SOCOCIM (Rufisque, Senegal), A Cement Factory

Open journal of air pollution Pub Date : 2022-01-01 DOI:10.4236/ojap.2022.111001

Maurice Ndeye, H. Synal, Matar Séne

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Abstract

Radiocarbon content in biogenic samples is widely used to study the variation of atmospheric CO 2 due to anthropogenic activities. A total of 20 samples of several types of tree leaves, were analyzed for this study. Sampling was carried out at the end of the rainy season in 2017 from the surrounding of the SOCOCIM cement factory in Rufisque town. Rufisque is located on the pe-ninsula of Cape Verde, 25 km east of Dakar, where it is the «south gate» of the agglomeration. Reference samples of five different species were collected during the same period (2017) from a clean zone. The 14 C method was used for the determination of Δ 14 C values. The data show that the 14 C concentration in the studied sites was significantly lower than the clean area, due to the release of anthropogenic CO 2 . To estimate the Suess effect, the fossil fuel fraction was determined based on equations of mass balance for CO 2 concentration, stable isotopic composition of carbon, and 14 C concentration. The results show that selected locations are affected differently according to their distance from the factory and the wind direction.

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SOCOCIM (Rufisque, Senegal)水泥厂附近树叶中的放射性碳浓度测量

生物源样品中的放射性碳含量被广泛用于研究人类活动引起的大气co2的变化。本研究共分析了20个不同类型的树叶样本。2017年雨季结束时，在Rufisque镇SOCOCIM水泥厂周围进行了采样。Rufisque位于达喀尔以东25公里的佛得角半岛上，是该城市群的“南门”。在同一时期(2017年)从洁净区收集了5种不同物种的参考样本。采用14c法测定Δ 14c值。数据表明，由于人为co2的释放，研究点的14c浓度明显低于清洁区。为了估计susess效应，化石燃料馏分根据co2浓度、碳稳定同位素组成和14c浓度的质量平衡方程确定。结果表明，所选地点与工厂的距离和风向不同，受到的影响也不同。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Open journal of air pollution

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