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Open AccessArticle

Turning Tissue Waste into High-Performance Microfiber Filters for Oily Wastewater Treatment

Key Laboratory of Groundwater Resources and Environment (Ministry of Education, China), College of New Energy and Environment, Jilin University, Changchun 130021, China
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Materials 2020, 13(2), 378; https://doi.org/10.3390/ma13020378
Received: 4 November 2019 / Revised: 25 December 2019 / Accepted: 31 December 2019 / Published: 14 January 2020
Developing low-cost, durable, and high-performance materials for the separation of water/oil mixtures (free oil/water mixtures and emulsions) is critical to wastewater treatment and resource recovery. However, this currently remains a challenge. In this work, we report a biopolymer microfiber assembly, fabricated from the recovery of tissue waste, as a low-cost and high-performance filter for oily wastewater treatment. The microfiber filters demonstrate superhydrophilicity (water contact angle of 28.8°) and underwater superoleophobicity (oil contact angle of 154.2°), and thus can achieve separation efficiencies of >96% for both free oil/water mixtures and surfactant-stabilized emulsions even in highly acidic (pH 2.2)/alkaline (pH 11.8) conditions. Additionally, the prepared microfiber filters possess a much higher resistance to oil fouling than conventional membranes when filtering emulsions, which is because the large-sized 3D interconnected channels of the filters can delay the formation of a low-porosity oil gel layer on their surface. The filters are expected to practically apply for the oily wastewater treatment and reduce the amount of tissue waste entering the environment. View Full-Text
Keywords: biopolymer microfiber; oil/water separation; antifouling; filter; oily wastewater biopolymer microfiber; oil/water separation; antifouling; filter; oily wastewater
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MDPI and ACS Style

Wei, G.; Dong, J.; Bai, J.; Zhao, Y.; Qin, C. Turning Tissue Waste into High-Performance Microfiber Filters for Oily Wastewater Treatment. Materials 2020, 13, 378.

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