纤维素基废弃棉织物吸附材料的制备及性能研究  

Study on the Preparation of Waste Cellulose Cotton Fabric Based Adsorbent and Its Properties

作　　者：周贤鹏 王斌[1] 宋国勇[1] ZHOU Xian-peng;WANG Bin;SONG Guo-yong(Beijing Key Laboratory of Lignocellulosic Chemistry,Beijing Forestry University,Beijing 100083,P.R.China)

机构地区：[1]北京林业大学林木生物质化学北京市重点实验室,北京100083

出　　处：《林产工业》2024年第1期61-67,共7页China Forest Products Industry

基　　金：国家自然科学基金项目面上项目(31971607)。

摘　　要：本研究以纤维素基废弃棉织物为原料,先通过润胀处理使棉织物疏解并使羟基暴露,后通过交联反应将聚乙烯亚胺(PEI)负载到纤维素上制备吸附材料,使用氨基黑10B(AB10B)模拟染料废水测试其吸附能力。探讨了不同润胀方式(浓碱、碱尿素和PEI)对PEI负载纤维素及对吸附材料性能的影响。结果表明:经PEI润胀处理制备的吸附材料,其吸附性能更优。随着PEI用量的增多,材料的吸附能力呈现先增强后减弱的趋势。此外,PEI分子量越大,材料的吸附性能越强。当PEI分子量为10000,制备的纤维素基吸附材料投放量为1 g/L时,其在2 h内对100 mg/L氨基黑10B废水的移除率可达99.63%,吸附过程符合Langmuir等温线模型和准二级动力学方程,属于化学单层吸附。In this study,a series of cellulose-based adsorbents were prepared using cellulose-based waste cotton fabrics as raw materials through first swelling treatment to loosen the cotton fabrics and expose the hydroxyl groups on the cellulose,followed by loading polyethyleneimine(PEI)onto the swollen cellulose substrate through a cross-linking reaction.Amino Black 10B(AB10B)was used to simulate dye wastewater to evaluate the adsorption properties.In this study,the effects of different swelling methods(concentrated alkali,alkali urea and PEI)on PEI loading capacity and the performance of cellulose-based adsorbents were systematically investigated.The results showed that the adsorbent prepared by PEI swelling treatment had better adsorption properties.Moreover,the adsorption capacity of the adsorbent showed a trend of first increasing and then decreasing with the increase of PEI dosage.Meanwhile,the adsorption performance of the adsorbent was positively correlated with the molecular weight of PEI.The removal rate of AB10B dye wastewater(100 mg/L)by the cellulose-based adsorbent prepared with PEI molecular weight of 10000 could reach 99.63%within 2 h when the dosage was 1 g/L.The adsorption isotherm of adsorbent for AB10B dye wastewater was more in line with the Langmuir adsorption,and the adsorption kinetic model conformed to the quasi-second-order reaction model,which proved that the adsorption process belonged to chemical monolayer adsorption.

关 键 词：废弃棉织物 纤维素 染料吸附 碱润胀 吸附机理 

分 类 号：TS6[轻工技术与工程] TS396