丙烯酰胺-柠檬酸改性葵花秸秆吸油材料的制备及吸油动力学  

Preparation and Oil Absorption Kinetics of Sunflower Straw Modified by Acrylamide-Citrate

作　　者：李小菊[1] 李惠成[1] 武芸[1] 胡浩斌[1] 李治军 王玉峰[1] 王丽朋[1] 张鹏会[1] LI Xiaoju;LI Huicheng;WU Yun;HU Haobin;LI Zhijun;WANG Yufeng;WANG Lipeng;ZHANG Penghui(School of Chemistry and Chemical Engineering,Longdong University,Qingyang 745000,China)

机构地区：[1]陇东学院化学化工学院,甘肃庆阳745000

出　　处：《化学与生物工程》2024年第1期55-62,共8页Chemistry & Bioengineering

基　　金：甘肃省青年基金项目(21JR7RM196);甘肃省自然基金项目(21JR1RM329)。

摘　　要：以农业废弃物葵花秸秆为原料,分别用10%氨水、丙酮-环己烷、甲苯-乙醇对葵花秸秆预处理后,采用丙烯酰胺-柠檬酸酯化法对其改性,研究了改性葵花秸秆对油品的吸附性能,开展了吸附热力学及动力学研究,探讨了改性葵花秸秆的吸油机理。结果表明,丙酮-环己烷预处理+改性葵花秸秆对油品的吸油性能最强,其次为甲苯-乙醇预处理+改性葵花秸秆、10%氨水预处理+改性葵花秸秆;改性葵花秸秆对不同油品的吸油性能大小为:大豆油>柴油>原油;丙酮-环己烷预处理+改性葵花秸秆对原油的保油率最高,10%氨水预处理+改性葵花秸秆对大豆油的去除率最高;吸附热力学表明改性葵花秸秆对油品的吸附是以单分子层吸附为主的化学吸附,该吸附过程符合准二级动力学方程。该研究为解决石油污染问题提供了新思路,也为农作物副产物的综合利用提供了方向。We pretreated sunflower straw with 10%ammonia,acetone-cyclohexane,and toluene-ethanol,respectively,and then modified it by acrylamide-citrate esterification.Moreover,we studied the adsorption performance of the modified sunflower straw to oil products,investigated the adsorption thermodynamics and adsorption kinetics,and discussed the oil absorption mechanism of the modified sunflower straw.The results show that acetone-cyclohexane pretreatment+modified sunflower straw has the strongest oil absorption performance,followed by toluene-ethanol pretreatment+modified sunflower straw,and 10%ammonia pretreatment+modified sunflower straw.The oil absorption performance of the modified sunflower straw for different oil products is as follows:soybean oil>diesel oil>crude oil.Acetone-cyclohexane pretreatment+modified sunflower straw has the highest oil retention rate for crude oil,and 10%ammonia pretreatment+modified sunflower straw has the highest removal rate for soybean oil.The adsorption thermodynamics indicates that the adsorption of modified sunflower straw to oil products is a chemisorption based on monomolecular layer adsorption,and the adsorption process is in accordance with the quasi-second-order kinetic equation.This study provides a new way to solve the problem of oil pollution,and also provides a direction for the comprehensive utilization of crop by-products.

关 键 词：葵花秸秆 预处理 酯化改性 吸油动力学 

分 类 号：TQ352[化学工程] TQ424[环境科学与工程—环境科学] X131.2