Green dispersants for oil spill response: A comprehensive review of recent advances

Green dispersants are so-called “green” because they are renewable (from bio-based sources), non-volatile (from ionic liquids), or are from naturally available solvents (vegetable oils). In this review, the effectiveness of different types of green dispersants, namely, protein isolates and hydrolysa...

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Bibliographic Details
Published in:Marine pollution bulletin 2023-08, Vol.193, p.115118-115118, Article 115118
Main Authors: Giwa, Adewale, Chalermthai, Bushra, Shaikh, Bismah, Taher, Hanifa
Format: Article
Language:English
Subjects:
Animals
Biosurfactant
biosurfactants
dispersants
fish
fungi
hydrophilicity
hydrophobicity
Ionic liquid
Ionic Liquids
lecithins
marine pollution
Oil spill dispersant
oil spills
Oils
Petroleum - metabolism
Petroleum Pollution - analysis
Protein
seawater
Solvents
soybeans
Surface-Active Agents - chemistry
toxicity
Vegetable oil
vegetables
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Summary:Green dispersants are so-called “green” because they are renewable (from bio-based sources), non-volatile (from ionic liquids), or are from naturally available solvents (vegetable oils). In this review, the effectiveness of different types of green dispersants, namely, protein isolates and hydrolysates from fish and marine wastes, biosurfactants from bacterial and fungal strains, vegetable-based oils such as soybean lecithin and castor oils, as well as green solvents like ionic liquids are reviewed. The challenges and opportunities offered by these green dispersants are also elucidated. The effectiveness of these dispersants varies widely and depends on oil type, dispersant hydrophilicity/hydrophobicity, and seawater conditions. However, their advantages lie in their relatively low toxicity and desirable physico-chemical properties, which make them potentially ecofriendly and effective dispersants for future oil spill response. •Dispersants from protein hydrolysates, microbial secretions, vegetable oils, and ionic liquids are reviewed.•Green dispersant effectiveness varies from 50 % to 90 %, using different oil types.•Dispersant effectiveness depends on dispersant concentration, water salinity, temperature, and oil properties.•Toxicity tests revealed that green dispersants exhibit low toxicity and desirable physico-chemical properties.•Green dispersants can be combined with traditional dispersants for higher performance and lower cost.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2023.115118