Photoinduced production of substances with humic-like fluorescence, upon irradiation of water samples from alpine lakes
文献类型：期刊论文
| 作者 | Carena, Luca3; Wang, Yiqun2; Gligorovski, Sasho2; Berto, Silvia3; Mounier, Stéphane1; Vione, Davide3 |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2023 |
| 卷号 | 319页码:137972 |
| 关键词 | DISSOLVED ORGANIC-MATTER MOLECULAR COMPOSITION PHOTO-TRANSFORMATION MOUNTAIN LAKES SPECTROSCOPY INDICATORS RESONANCE ACIDS SEA PH |
| ISSN号 | 0045-6535 |
| DOI | 10.1016/j.chemosphere.2023.137972 |
| 英文摘要 | Evidence is here provided that irradiation of some lake water samples can trigger the formation of fluorophores with humic-like properties, at the same time increasing water absorbance. This phenomenon is the opposite of photobleaching, which is often observed when natural waters are irradiated. The photoproduced humic-like fluorophores observed here would be of autochthonous rather than allochthonous origin, which marks a difference with the fraction of humic substances that derives from terrestrial sources. Photogeneration of humic-like compounds can be highlighted in water samples where the fluorescence signal of initially occurring humic substances is low, so that their photobleaching is minimised. Samples that are most likely to show photoinduced formation of humic-like fluorophores are in fact characterised by high values of protein-like vs. humic-like contribution ratios to fluorescence, as evidenced by parallel factor (PARAFAC) analysis. Mountain lakes in late summer appear to be suitable candidates to highlight the described phenomenon. In some cases, lake-water irradiation caused a decrease in the spectral slope of the absorbance that, together with increasing absorbance values, is consistent with an increase in molecular mass and aromaticity of organic matter. The absorbance increase triggered by irradiation might play a role in screening biologically harmful UV radiation, in mountain environments that would otherwise be characterised by very clear water that allows for easy transmission of UV light along the water column. ? 2023 Elsevier Ltd |
| WOS研究方向 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000963747000001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80221]  |
| 专题 | 有机地球化学国家重点实验室 |
| 作者单位 | 1.Univ. Toulon, Aix Marseille Univ., CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS 60584, Toulon; 83041, France 2.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510 640, China 3.Dipartimento di Chimica, Università di Torino, Via Pietro Giuria 5, Torino; 10125, Italy |
| 推荐引用方式 GB/T 7714 | Carena, Luca,Wang, Yiqun,Gligorovski, Sasho,et al. Photoinduced production of substances with humic-like fluorescence, upon irradiation of water samples from alpine lakes[J]. CHEMOSPHERE,2023,319:137972. |
| APA | Carena, Luca,Wang, Yiqun,Gligorovski, Sasho,Berto, Silvia,Mounier, Stéphane,&Vione, Davide.(2023).Photoinduced production of substances with humic-like fluorescence, upon irradiation of water samples from alpine lakes.CHEMOSPHERE,319,137972. |
| MLA | Carena, Luca,et al."Photoinduced production of substances with humic-like fluorescence, upon irradiation of water samples from alpine lakes".CHEMOSPHERE 319(2023):137972. |
入库方式： OAI收割
来源：广州地球化学研究所
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