Recycled wool-based nonwoven material as an oil sorbent

Area of Science:

• Materials Science
• Environmental Science
• Textile Engineering

Background:

• Oil spills pose significant environmental threats, necessitating effective and biodegradable cleanup solutions.
• Synthetic sorbents are widely used but suffer from poor biodegradability.
• Recycled natural fibers present a sustainable alternative for oil spill remediation.

Purpose of the Study:

• To evaluate the efficacy of recycled wool-based nonwoven material as an oil sorbent.
• To compare its sorption capacity for different oil types and conditions.
• To assess the material's reusability and the impact of surface modifications.

Main Methods:

• Sorption experiments using recycled wool nonwoven material with base oil SN 150, diesel, and crude oil in demineralized and artificial seawater.
• Surface modification of the nonwoven material using chitosan and low-temperature air plasma.
• Analysis of loose wool fibers and comparison with nonwoven material.
• White light scanning interferometry to analyze fiber surface roughness.
• Reusability tests of the sorbent material.

Main Results:

• Recycled wool nonwoven material demonstrated higher sorption capacity for base oil SN 150 compared to diesel and crude oil.
• Surface modifications with chitosan and plasma slightly decreased sorption capacity.
• Loose wool fibers exhibited significantly higher sorption capacities than the nonwoven material.
• Fiber surface roughness, analyzed via white light scanning interferometry, was identified as a key factor in oil sorption.
• The material proved to be reusable in laboratory settings.

Conclusions:

• Recycled wool-based nonwoven material shows promising sorption properties and reusability for oil spill cleanup.
• Natural fiber-based sorbents can be a viable, biodegradable alternative to synthetic materials.
• Fiber surface characteristics, such as roughness, play a crucial role in sorption efficiency.