Hybrid Systems for Marine Petroleum Remediation: Efficacy, Costs, and Adaptation

Abstract

Global dependence on petroleum as a primary energy source has heightened the risk of marine pollution, with tanker spills releasing over 2.1 million barrels of crude oil annually and driving bioaccumulation, phototoxicity, and ecological degradation. Conventional remediation methods—including mechanical skimming, advanced oxidation processes (AOPs), and bioremediation—each face critical limitations. Hybrid systems that integrate AOPs with bioremediation show considerable promise but lack standardized frameworks for cost-effectiveness and efficacy assessment. This review synthesizes current research to address three gaps: (1) comparative analysis of lifecycle costs between hybrid and standalone methods, (2) definition of region-specific performance thresholds across environmental gradients, and (3) development of adaptive frameworks for resource-limited settings. Key findings indicate that hybrid systems lower lifecycle costs by 25–40% in industrialized regions (with payback periods of 2.8 years in tropical zones) and operate optimally under defined environmental conditions (e.g., TiO₂-AOPs at pH 7.5–8.5 and 25–35 °C). Modular solutions, such as solar-driven AOPs and community-scale bioreactors, achieve up to 85% COD removal in resource-constrained areas. These insights inform SDG 14–aligned policy and practice, while financial tools such as green bonds can further accelerate adoption. Future research should prioritize long-term ecological monitoring and the scalable integration of nanomaterials and AI-based systems.