摘要
生物质多孔炭作为一种吸附能力强、环境友好、原料范围广、生产成本低的高效多孔吸附材料,能有效应对当前8益严峻的四环素水体污染问题。然而,以粉末形式存在的生物质多孔炭的可回收性较差,制约了其进一步发展。为了改善生物质多孔炭的可回收性,本研究将牛角基生物质多孔炭加人到低成本且具有一定吸附性能的壳聚糖中,采用酸溶/碱自固化法制备了平均粒径2 mm的壳聚糖--生物质多孔炭复合球形吸附剂以去除水溶液中的四环素。该生物质多孔炭基复合球对四环.素具有良好的吸附效果,其吸附过程遵循准一级动力学模型和Freundlich等温吸附模型,35℃下最大实测吸附容量可达365.74 mg/g,高于大多数常规四环素吸附剂,且具有优异的可回收性,有望为生物质多孔炭吸附剂的回收问题提供-种有前景的新解决方案。
As a new type of adsorption material,biomass porous carbon has the significant advantages of high adsorp-tion capacity,envionmental friendliness,wide range of raw materials and low cost.It can efectivelye deal with the in-creusingly serious problem of tetracycline pollution.However,the recoverability of biomass porous carbon in the form of powder is poor,which restricts its further development.In order to improve the reeyclablity,we incorporated the horn-based biomass porous carbon into chitosan to prepare the Chitosan-Carbon composite beads adsorbent with an average paricle size of 2 mm by acid solution/alkali self-curing method.As a result,the Chitosan-Carbon composite beads ex-hibited a good adsorption performance toward tetraeycline.The adsorption process followed Quasi-first-order model and Freundlich isotherm model.The maximum adsorption capacity of actual test could reach 365.74 mg/g,which is higher than most conventional tetracyeline adsorbents with an excellent recoverabilty.It is expected to provide a promising new solution for the recovery problem of biomass porous carbon adsorbent.
作者
刘翊亦
李承明
Liu Hongyi;Li Chengming(Beijing University of Chemical Technology,School of Materials Science and Engineering,Beijing 100029)
出处
《明胶科学与技术》
CAS
2022年第1期24-40,共17页
The Science and Technology of Gelatin
关键词
生物质多孔炭
壳聚糖
四环素吸附
复合材料
biomass porous carbon
chitosan
adsorption of tetracyeline
composite
