Pauline L. Martinot , Catherine Guigue , Léa Guyomarc'h , Xavier Mari , Nguyen Hoang Anh Chu , Cam Tu Vu , Lea Boettcher , Thi Hong Nhung Dang , Jutta Niggemann , Thorsten Dittmar , Marc Tedetti
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引用次数: 0
摘要
在航运排放的污染物中，黑碳（BC）（又称烟碳）因其对气候、空气质量、人类健康和生态系统的影响而备受关注。船舶排放的 BC 可能会进入海洋水域，并部分转移到海水溶解相中。在这项研究中，我们研究了由船舶排放的 BC 颗粒（DOMBC）衍生的溶解有机物（DOM）的光学特性（吸光度和荧光），并将其与其他来源的 DOMBC（柴油机驱动的工业机器、生物质燃烧、城市灰尘）以及陆地和海洋 DOM（DOMTER、DOMMAR）进行了比较。与其他测试材料相比，船用和柴油机用 DOMBC 的荧光最大强度与溶解有机碳浓度之比（Fmax/DOC）较高，在 254 纳米波长处的紫外吸收比（SUVA254）较高，荧光发射波长较低。平行因子分析（PARAFAC）得出的船舶和柴油 DOMBC 的荧光团与使用苯磺酸法（BPCA）测定的溶解黑碳（DBC）浓度具有显著相关性。基于这些结果，我们提出了燃烧指数（COX），以帮助检测和跟踪海水中的船舶/燃料燃烧污染。
Optical characterization of black carbon-derived DOM: Implication for the fluorescence detection of fuel combustion products in marine waters
Among pollutants released from shipping, black carbon (BC), also known as soot carbon, is of great interest due to its impacts on climate, air quality, human health and ecosystems. BC emitted from ships may enter marine waters and partially transfer to the seawater dissolved phase. In this study, we investigated the optical properties (absorbance and fluorescence) of dissolved organic matter (DOM) derived from BC particles (DOMBC) emitted by ships, which were compared to those of DOMBC of other origins (diesel-powered industrial machine, biomass burning, urban dust), and to terrestrial and marine DOM (DOMTER, DOMMAR). Ship and diesel DOMBC displayed higher ratios of fluorescence maximum intensity to dissolved organic carbon concentration (Fmax/DOC), higher specific UV absorbance at 254 nm (SUVA254), and lower fluorescence emission wavelengths than the other tested materials. The parallel factor analysis (PARAFAC)-derived fluorophores of the ship and diesel DOMBC exhibited significant correlations with the concentration of dissolved black carbon (DBC), determined using the benzenepolycarboxylic acid (BPCA) method. Based on these results, we propose the Combustion indeX (COX), to help detecting and tracking ship/fuel combustion pollutions in marine waters.
期刊介绍：
Marine Chemistry is an international medium for the publication of original studies and occasional reviews in the field of chemistry in the marine environment, with emphasis on the dynamic approach. The journal endeavours to cover all aspects, from chemical processes to theoretical and experimental work, and, by providing a central channel of communication, to speed the flow of information in this relatively new and rapidly expanding discipline.
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