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المؤلفSarra N., Dimassi
المؤلفHahladakis, John N.
المؤلفChamkha, Mohamed
المؤلفAhmad, Mohammad I.
المؤلفAl-Ghouti, Mohammad A.
المؤلفSayadi, Sami
تاريخ الإتاحة2024-03-03T03:57:39Z
تاريخ النشر2024-02-20
اسم المنشورScience of The Total Environment
المعرّفhttp://dx.doi.org/10.1016/j.scitotenv.2023.168870
الرقم المعياري الدولي للكتاب00489697
معرّف المصادر الموحدhttps://www.sciencedirect.com/science/article/pii/S0048969723074995
معرّف المصادر الموحدhttp://hdl.handle.net/10576/52537
الملخصThis work investigates the biodegradation of polyethylene (PE) and low-density polyethylene (LDPE) and the leaching of their harmful additives. Micro/macro-plastics of both types were subjected to different laboratory-controlled conditions for 3 months. Gas Chromatography-Mass Spectroscopy (GC–MS) results revealed that leachate concentrations ranged from 0.40 ± 0.07 μg/L to 96.36 ± 0.11 μg/L. It was concluded that the additives' leaching process was promoted by light. However, light was not the only factor examined; microorganisms, pH, salinity, aeration/mixing and temperature influenced the biodegradation process, too. GC–MS results showed a prodigious impact on the biodegradation process when Pseudomonas aeruginosa was added to the artificial seawater compared to plastics exposed to light/air only. Scanning Electron Microscopy (SEM) micrographs demonstrated a significant alteration in the plastics' morphologies. Similarly, Fourier-Transform Infrared Spectroscopy (FTIR) spectra showed obvious changes in plastics characteristic peaks, especially microplastics. Furthermore, it was shown that PE was more susceptible to degradation/biodegradation than LDPE. Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) findings showed that some toxic metals were present in water samples after experiments, with concentrations above the permissible limits. For instance, bio-augmentation/bio-stimulation experiments showed that the concentrations of Pb, Sr, and Zn were 0.59 mg/L, 70.09 mg/L, and 0.17 mg/L, respectively; values above the permissible limits. It is crucial to emphasise that plastics must be meticulously engineered to avoid environmental and human impacts, originated from their degradation by-products. Furthermore, a holistic approach engaging stakeholders, researchers, policymakers, industries and consumers, is essential to effectively tackle the global challenge of marine plastic pollution.
راعي المشروعThis work was carried out in the framework of QU Marubeni Grants - Qatar-Japan Research Collaboration Project QJRC-2020-3. The findings achieved herein are solely the responsibility of the authors. The FTIR, SEM, ICP-OES and GC–MS analyses were performed in the Central Laboratories unit, Qatar University.
اللغةen
الناشرElsevier
الموضوعBiodegradation
Plastics
Leachates
Pseudomonas aeruginosa
Halomonas venusta
العنوانInvestigation on the effect of several parameters involved in the biodegradation of polyethylene (PE) and low-density polyethylene (LDPE) under various seawater environments
النوعArticle
رقم المجلد912
ESSN1879-1026
dc.accessType Full Text


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