رسالة جامعية
Study of contaminants transported by microplastics in the Lebanese marine environment ; Étude des contaminants transportés par les microplastiques dans le milieu marin Libanais
| العنوان: | Study of contaminants transported by microplastics in the Lebanese marine environment ; Étude des contaminants transportés par les microplastiques dans le milieu marin Libanais |
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| المؤلفون: | Elseblani, Rim |
| المساهمون: | Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Pau et des Pays de l'Adour, Joanna Szpunar, Milad Fakhri |
| المصدر: | https://theses.hal.science/tel-04136839Test ; Analytical chemistry. Université de Pau et des Pays de l'Adour, 2022. English. ⟨NNT : 2022PAUU3049⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2022 |
| المجموعة: | HAL e2s UPPA (Université de Pau et des Pays de l'Adour) |
| مصطلحات موضوعية: | Microplastics, Organic pollutants, Metals, Lebanese coast, Marine environment, Microplastiques, Polluants organiques, Métaux, Côte Libanaise, Environement marin, [CHIM.ANAL]Chemical Sciences/Analytical chemistry |
| الوصف: | Anthropogenic activities are increasingly putting pressure on the environment of the Lebanese Mediterranean coast. One of the main emerging sources of pollution is plastics ending up in the marine environment and persisting as small (so-called microplastics, 1 µm - 5 mm) particles which become a vector for the transport of a variety of contaminants. The assessment of microplastics-related environmental risks requires the development of multi-scope analytical approaches targeting different classes of organic and inorganic pollutants.A comprehensive study of microplastic pollution of the Lebanese Mediterranean coast was performed. The samples were collected from the shoreline in 2020-2021, sieved and sorted into different sizes. The nature of the microplastics was investigated by Fourier Transform Infrared Spectroscopy (FTIR) revealing the predominant presence of polyethylene and polypropylene. For the study of adsorbed organic pollutants, solid-liquid extraction (leaching) procedures targeting polar and non-polar compounds were optimized. Metals were analyzed after the complete microwave assisted digestion of samples. Prior to quantitative analysis, the organic pollutants were screened according to their accurate mass, chromatographic behavior and fragmentation. In this way, the lists of compounds for the subsequent targeted analysis were established. This study produced the first ever LC-MS/MS and GC-MS data on microplastics-adsorbed organic pollutants present on Lebanese Mediterranean coast and demonstrated the persistency of several legacy pesticides, such as DDT prohibited for use more than 20 years ago and chlorpyrifos that was banned for use in Lebanon several years ago. Also, the presence of personal care products and pharmaceuticals, such as phenacetin and minoxidil, polycyclic aromatic hydrocarbons (PAH), different polychlorinated biphenyl (PCB) congeners prohibited long time ago due to their toxic effect on human health, and different additives incorporated in plastics was demonstrated. The ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| العلاقة: | NNT: 2022PAUU3049; tel-04136839; https://theses.hal.science/tel-04136839Test; https://theses.hal.science/tel-04136839/documentTest; https://theses.hal.science/tel-04136839/file/thesiselseblani.pdfTest |
| الإتاحة: | https://theses.hal.science/tel-04136839Test https://theses.hal.science/tel-04136839/documentTest https://theses.hal.science/tel-04136839/file/thesiselseblani.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.1DF4E488 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |