Abstract
Oily wastewater from shipping waste and marine accidents have seriously polluted the marine environment and brought great harm to human production and health. With the increasing awareness of environmental protection, the treatment of marine oily wastewater has attracted extensive attention from the international community. Marine oily wastewater has various forms and complex components, so its treatment technology faces great challenges. Sources, types, supervision, and treatment of marine oily wastewater are introduced in this paper. The research progress of marine and ship’s oily wastewater treatment technologies in recent years are reviewed from the perspectives of physical treatment, chemical treatment, biological treatment, and combined treatment, respectively. Principles and characteristics of all kinds of technologies were analyzed. In addition, this paper shows that multiple processing technologies used in combination for the purpose of high efficiency, environmental protection, economy, and energy conservation are the future development trend.
Highlights
With the rapid development of the global shipping industry, marine oil pollution caused by illegal discharge of sewage, oil spill accidents, and offshore oil drilling platforms has become an increasingly serious environmental and safety problem [1,2,3]
The results showed that the aerogel could separate oil–seawater mixtures with high separation efficiency and good reusability
Abdelwahab et al [32] evaluated a modified sugarcane bagasse (B) hydrophobic sorbent for diesel oil removal from artificial seawater. Their results showed that additional hydrophobicity was achieved by coating the esterified bagasse (EB) with a hydrophobic polymer (PAN), as a peak adsorption capacity of 8.4 g/g for diesel oil and reused for more than six cycles were reported at a pH of 5.5, sorbent dose of 2 g/L, initial oil concentration of 20 g/L, and contact time of 40 min
Summary
With the rapid development of the global shipping industry, marine oil pollution caused by illegal discharge of sewage, oil spill accidents, and offshore oil drilling platforms has become an increasingly serious environmental and safety problem [1,2,3]. Oil products contain volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), and other toxic and harmful substances, which can affect the reproduction and growth of marine organisms [4,5]. The large amount of oily wastewaters can reduce the production and diversity of marine animals and plants. Toxic compounds in oily wastewater can cause ecological disturbances, including alteration of the aquatic community structure and food chains. Carcinogens and toxins accumulated at the bottom of the food chain and passed down to human consumption could cause great harm to human health. Toxic compounds have various adverse impacts on the surrounding environment, such as air pollution caused by the evaporation of oil and hydrocarbon contents to the atmosphere
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