Preparation method and application of cellulose/lignin/clay composite aerogel for highly efficient adsorption of antibiotics

Abstract

The present invention belongs to the field of aqueous environmental treatment and specifically relates to a preparation method and application of a cellulose/lignin/clay composite aerogel for the efficient adsorption of antibiotics. Cellulose/lignin/clay composite aerogels were prepared by sol-gel, cross-linking, and freeze-drying methods, and the preparation method and operation process were simple and easy to reuse with a large yield. The raw materials used in the present invention are the natural polymer materials, cellulose, lignin, and clay minerals, which are widely available and non-toxic, cellulose and lignin are biodegradable and have no risk of secondary pollution. Cellulose can be used as the matrix of aerogels owing to its unique environmental friendliness, biodegradability, and excellent structural skeleton structure. Cellulose can be used as the skeleton of aerogels, and lignin and clay minerals can be used as modifiers, which can significantly improve the mechanical properties of cellulose aerogels and the adsorption properties of antibiotics. The cellulose/lignin/clay composite aerogel of the present invention presents excellent adsorption ability for antibiotics.