A novel bio-aerogel based on agroforestry waste chestnut shell for enhanced oil-water separation performance

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-04 DOI:10.1016/j.colsurfa.2024.135701

Ci Wei , Mengxue Li , Hui Wang , Yang Liu , Shunlin Li , Xinyu Li , Zhaoyong Bian

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Abstract

Bio-based aerogels have attracted much attention due to their biodegradability and excellent oil-water separation properties. However, the preparation of inexpensive green aerogels with high separation efficiency is still a great challenge. In this paper, low-density, high-adsorption capacity and superhydrophobic chestnut shell-based bio-aerogels were prepared by chemical cross-linking and chemical vapor deposition using agricultural and forestry waste chestnut shells as the precursor of aerogels to achieve high efficiency of oil-water separation and to achieve the goal of “treating waste with waste”. The covalent cross-linking of chestnut shell cellulose and cross-linking agent to form silicone-containing functional groups improved the pore structure, hydrophobicity and mechanical properties of chestnut shell cellulose, and under the action of capillary force, the oil was retained in the pores of the bio-aerogels, which achieved the selective adsorption of oil and organic solvents in the oil-water mixture, with a separation efficiency of more than 98 %. After 10 cycles, the bio-aerogel still has good reusability. This eco-friendly and low-cost aerogel provides a practical method for resource conversion and recycling, as well as a green and innovative way for the treatment of oily wastewater.

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基于农林废弃栗壳的新型生物气凝胶可提高油水分离性能

生物基气凝胶因其生物降解性和优异的油水分离性能而备受关注。然而，制备具有高分离效率的廉价绿色气凝胶仍是一项巨大挑战。本文以农林废弃物栗壳为气凝胶前驱体，通过化学交联和化学气相沉积法制备了低密度、高吸附容量、超疏水性的栗壳基生物气凝胶，实现了高效油水分离，达到了 "以废治废 "的目的。栗壳纤维素与交联剂共价交联形成含硅官能团，改善了栗壳纤维素的孔隙结构、疏水性和力学性能，在毛细力的作用下，油被截留在生物气凝胶的孔隙中，实现了对油水混合物中油和有机溶剂的选择性吸附，分离效率达98%以上。经过 10 次循环后，生物气凝胶仍具有良好的重复使用性。这种生态友好型低成本气凝胶为资源转化和循环利用提供了一种实用方法，也为含油废水的处理提供了一种绿色创新途径。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.