Abstract
Fast industrialization and infrastructural development have increased the use of fossil fuels, leading to frequent oil spills during mining and/or marine transportation produces oily wastewater. Everywhere in the world, oil spills poses a serious global environmental problem and is considered an environmental disaster. Hence, there is a need to find an efficient way to treat oil–water separation, and a recent approach is through the use of functional materials. Emerging studies suggest that superhydrophobic materials have great potential for the separation of oil–water. In this review discusses the potential of superwettable materials, especially superwettable layered double hydroxides (LDHs) materials for efficient oil–water separation. Superwettable LDHs demonstrate various mechanism for water and oil removal, such as superhydrophilicity/superoleophobicity, superhydrophobicity/superoleophilicity, sedimentation/flocculation or adsorption, and oil mopping. Also this review highlight LDHs capability and their role in achieving superwettability during oil–water separation, addressing challenges and briefly discusses the future research direction in this promising area.
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