OICC Press International Journal of Nano Dimension 2228-5059 16 2 2025 04 01 Utilize Polypropylene-Titanium Dioxide nano-composite, Graphene Oxide-Chitosan-Bentonite nano-absorbent, and straw to remove petroleum hydrocarbons in aquatic environments aggressively 10.57647/j.ijnd.2025.1602.14 EN Shahram Azad Zarabadi Department of Environment, Tonekabon Branch, Islamic AzadUniversity, Tonekabon, Iran https://orcid.org/0009-0003-2866-0908 Aptin Rahnavard Department of Environment, Tonekabon Branch, Islamic AzadUniversity, Tonekabon, Iran https://orcid.org/0000-0002-1546-7944 Farid Gholamreza Fahimi Department of Environment, Tonekabon Branch, Islamic AzadUniversity, Tonekabon, Iran https://orcid.org/0000-0002-3929-7548 Keyvan Saeb Department of Environment, Tonekabon Branch, Islamic AzadUniversity, Tonekabon, Iran https://orcid.org/0000-0002-7533-334X Journal Article 2025 04 01 Mitigating petroleum pollutants from wastewater is a critical concern in environmental engineering. Various methods are employed for the removal of these pollutants from wastewater. This research focused on developing adsorbents for the absorption of PAHs from nanocomposites and natural and synthetic materials. polypropylene fiber-titanium dioxide (PPTO) nanocomposite, graphene oxide-chitosan-bentonite (GOCB) Nano-absorbent, Straw (ST), and a combination of these adsorbents (CB)) Nano-absorbents were employed to remove oil pollutants. The experiments were conducted under different acidity levels, varying concentrations of effluent and absorbent, and other retention times. FTIR, SEM, XRD, and GC tests were performed to determine the absorption rate. The results demonstrated that the PPRO nanocomposite and the combination of adsorbents and exhibited the highest removal efficiency, achieving a remarkable 97% removal of petroleum hydrocarbons at a concentration of 10 mg/L. Among the other groups, Straw demonstrated a high absorption rate of 93%, while GOCB showed the lowest rate of 80%. Furthermore, the study identified pH 10 as optimal for PPTO and ST, whereas GOCB performed best at pH 3. Augmenting the adsorbent dosage improved pollutant removal; however, surpassing the optimal level did not result in further enhancements. These findings highlight the potential of the PPTO nanocomposite as a promising solution for eliminating petroleum hydrocarbons from oil-contaminated water, thus contributing to developing effective strategies for addressing oil pollution in aquatic environments.   Author Correction: https://doi.org/10.57647/j.ijnd.2025.1602.14-correction