Bio-carbon coil aerogels from tea waste: A sustainable solution for efficient oil-water separation

废物管理 碳纤维 分离(统计) 环境科学 化学 材料科学 化学工程 工程类 复合材料 计算机科学 机器学习 复合数
作者
Zhijun Wang,Hao Chen,Zhiqing Wu,Yijia Li,Fei Liu,Zhongyun Ma,Peng He,Qi Liu,Feng Tao
出处
期刊:Separation and Purification Technology [Elsevier BV]
卷期号:342: 127006-127006 被引量:3
标识
DOI:10.1016/j.seppur.2024.127006
摘要

Discharging wastewater containing oils, fats, and organic solvents into water bodies poses a significant threat to the already limited freshwater resources. In recent years, three-dimensional (3D) porous adsorbent materials, such as aerogel materials, have gained attention for their high separation effectiveness in adsorption technology. However, the poor mechanical strength of existing aerogel materials limits their application in oil–water separation. To address this challenge, this study proposes to use carbon coils obtained from tea waste as a template for producing low-cost, ultra-light, elastic, and highly recyclable bio-carbon coil aerogels (BCCA). The BCCA, featuring high porosity and a hierarchical porous structure, demonstrated exceptional performance in oil–water separation applications. Specifically, it exhibited a high adsorption capacity for organic solutions (39 ∼ 117 g/g) and oils (32 ∼ 41 g/g), respectively, along with excellent selectivity, rapid adsorption time of approximately 30s, and good reuse capability, maintaining an adsorption efficiency of 85 %. These remarkable properties can be attributed to the exceptional hydrophobicity of the BCCA, with a contact angle of 134°, and the rapid capillary action facilitated by the helical network structure. The use of tea waste-derived carbon coils as a precursor for producing efficient and sustainable carbon coil aerogels presents a promising solution for environmental remediation, particularly in oil–water separation applications. This research addresses the issue of wastewater contamination and contributes to the utilization of tea waste, a readily available and abundant biomass resource, in the development of value-added materials for environmental sustainability.
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