Purification of emulsified oily polluted waters with modified melamine foams
المؤلف | Hailan, Sarah |
المؤلف | Sobolciak, Patrik |
المؤلف | Kasak, Peter |
المؤلف | Popelka, Anton |
المؤلف | Tong, Yongfeng |
المؤلف | Adham, Samer |
المؤلف | Krupa, Igor |
تاريخ الإتاحة | 2023-06-26T04:54:18Z |
تاريخ النشر | 2023 |
اسم المنشور | Environmental Technology and Innovation |
المصدر | Scopus |
الملخص | Oil and gas industry operations produce tremendous amounts of wastewater (produced water; PW). Tertiary treatment of the PW in the final treatment stage is challenging due to the presence of colloids with sizes < 500 nm and a low concentration target for the effluent of <10 mg/L. This study was focused on the purification of colloidal PW with modified melamine foams (MFs) and ferric chloride. The modified MFs exhibited superhydrophobic and superoleophilic character due to increasing roughness and complexation of Fe3+ ions within the MF structure. The modified MF showed separation efficiencies up to 86 ± 3% for emulsions containing 120 ppm carbon. The Fe3+ cations changed the hydrophilicities of the foams and made them highly hydrophobic, and they also contributed significantly to the adsorption of negatively charged species, such as crude oil droplets modified with an anionic surfactant (sodium dodecyl sulfate). The demulsification mechanism involved multiple diffusion processes run over different time scales, including diffusion of an emulsion into the foam and diffusion of the oil droplets within the foam, combined with parallel adsorption of the oil droplets onto the solid skeleton of the foam. The adsorption capacity of the MFs increased linearly with increasing initial concentration of crude oil content in the PW. The MFs were reusable for six consecutive cycles. |
راعي المشروع | This research was made possible by a grant from the Qatar National Research Fund under its National Priorities Research Program (award number NPRP12S-0311-190299 ) and by financial support from the ConocoPhillips Global Water Sustainability Center (GWSC), Qatar and Qatar Petrochemical Company (QAPCO) . The paper's content is solely the responsibility of the authors and does not necessarily represent the official views of the Qatar National Research Fund or ConocoPhillips and QAPCO. |
اللغة | en |
الناشر | Elsevier |
الموضوع | Adsorption Demulsification Diffusion Ferric chloride Melamine foams Produced water Superhydrophobicity |
النوع | Article |
رقم المجلد | 31 |
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