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Thirty\u2010six samples were collected over 6\u2009months from three operational areas: the fuel unloading area (FUA), the fuel tank area (FTA), and the turbine unit area (TUA). The samples were analyzed for chemical oxygen demand (COD), total suspended solids (TSS), total dissolved solids (TDS), turbidity, and oil and grease. COD reduction was the primary indicator, while AC\u2013TP\u2010corrected filter\u2010retained solids mass and filtration time were supporting indicators. Dose screening on FUA samples with AC:TP ratio of 1.0:0.5 was identified as the preliminary best\u2010performing dosage based on COD reduction, with corrected filter\u2010retained solids behavior and available filtration\u2010time data used as supporting indicators. Applying this dosage to FUA, FTA, and TUA wastewater yielded COD removals of about 75%\u201382%, 79%, and 79.5%, respectively. Retained solids mass increased by 20%\u201355%, and filtration time decreased by up to ~60%. Statistical analyses using analysis of variance (ANOVA), paired\n                    <jats:italic>t\u2010<\/jats:italic>\n                    tests, and COD\u2013TSS\/COD\u2013filtration\u2010time regressions confirmed the significance of these improvements. Scanning electron microscope (SEM) and X\u2010ray diffraction (XRD) observations supported a tentative interpretation of coupled carbon\u2010assisted organic removal and fiber\u2010assisted physical retention.\n                  <\/jats:p>","DOI":"10.1002\/open.70278","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T16:48:03Z","timestamp":1791391683000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synergy of Charcoal\u2013Cellulose Fibers for Enhanced COD and TSS Removal From Oily Industrial Wastewater: Experimental Assessment and Statistical Modeling"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-3228-9625","authenticated-orcid":false,"given":"Taha A.","family":"Labani","sequence":"first","affiliation":[{"name":"Department of Environment Faculty of Environmental Science King Abdulaziz University  Jeddah Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0665-3670","authenticated-orcid":false,"given":"Rajeev","family":"Kumar","sequence":"additional","affiliation":[{"name":"Department of Environment Faculty of Environmental Science King Abdulaziz University  Jeddah Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2308-3086","authenticated-orcid":false,"given":"Fahed A.","family":"Aloufi","sequence":"additional","affiliation":[{"name":"Department of Environment Faculty of Environmental Science King Abdulaziz University  Jeddah Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6244-8394","authenticated-orcid":false,"given":"M. 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