Department of Thermal Science and Energy Engineering,University of Science and Technology of China

吸附法作为一种简单有效的去除水中残留四环素的方法,已引起了广泛的关注。生物油重质组分富含酚类、脂类、醛类等含氧官能团和芳构化结构,这些特性对四环素的吸附效率产生了影响。另外,生物油重质组分在高温下发生聚合反应,可以生成一种层状碳,这种碳前驱体具有优良的属性,适用于制备多孔碳。金属有机骨架作为一种新型的碳骨架结构材料,具有高吸附能力、可调孔径和高可逆性,已成为了吸附研究热点。以生物油重质馏分为碳前驱体,加入2-甲基咪唑锌盐和KOH,在800℃下采用一锅法合成高性能多孔碳。研究了生物炭对四环素废水的吸附行为。分析了3种生物炭的特性。结果表明,HZK-800的比表面积大于HK-800,是HZ-800的7倍。HZK-800对四环素的最大吸附量为464.55mg/g。此外,HZK-800在强酸和强碱溶液中仍能保持良好的吸附性能。HZK-800提供了优于现有生物炭吸附剂材料的显著优点。吸附动力学、吸附等温线和热力学分析表明,HZK-800的吸附是以化学吸附为主的自发吸热过程。

Adsorption has been widely interested as a simple and efficient method to remove residual tetracycline from water. Bio-oil heavyfractions rich in phenols,lipids,aldehydes,and other oxygen-containing functional groups and aromatized structures affect the adsorptionefficiency of tetracycline. The polymerization reaction of the heavy component of bio-oil occurs at high temperatures,which can produce alayered carbon,which is an excellent carbon precursor suitable for the preparation of porous carbon. Metal-organic skeleton as a new typeof carbon skeleton structural material with high adsorption capacity,adjustable pore size and high reversibility has become a hot spot ofadsorption research. The heavy fraction of bio-oil was used as a carbon precursor,and 2-methylimidazole zinc salt and KOH were addedto synthesize high-performance porous carbon at 800 ℃ using a one-pot method. The adsorption behavior of biochar on tetracyclinewastewater was investigated. The characteristics of three types of biochar were analyzed. The results indicated that HZK-800 had a largerspecific surface area than the HK-800 and was seven times larger than the HZ-800. HZK-800 showed the maximum adsorption oftetracycline up to 464.55 mg/g. Furthermore,HZK-800 could still maintain excellent adsorption in strong acid and alkali solutions. HZK-800 provided significant advantages over existing biochar adsorbent materials. The adsorption kinetics,adsorption isotherms,andthermodynamic analyses revealed that the adsorption of HZK-800 was a spontaneous heat absorption process,relying mainly onchemisorption.

国家自然科学基金资助项目(52306283)

马亚凯,朱锡锋,王储.一锅法制备复合材料的吸附性能研究[J].洁净煤技术,2025,31(2):38−48.

MA Yakai,ZHU Xifeng,WANG Chu. Preparation of high performance bio-oil derived carbon by MOF template-alkaliactivation method[J].Clean Coal Technology,2025,31(2):38−48.