改性荷叶对1,4-苯二酚吸附性能的研究-《郑州大学学报(工学版)》

文章信息/Info

作者:: 韩秀丽; 宋阿娟; 白净; 方书起; 1.郑州大学化工与能源学院,河南郑州4500012.生物质炼制技术与装备河南省工程实验室,河南郑州450001

Author(s):: Han Xiuli1; Song Ajuan2; Bai Jing1; Fang Shuqi1; 1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan; 2. Henan Engineering Laboratory of Biomass Refining Technology and Equipment, Zhengzhou 450001, Henan

Keywords:: lotus leaf; triethylenetramine; response surface analysis; hydroquinone; thermodynamics

摘要:: 以天然荷叶为原料、三乙烯四胺为改性剂,对荷叶进行改性处理,并用吸附法处理1,4-苯二酚废水.采用响应面分析方法对荷叶改性工艺进行优化,得到最佳工艺条件为:反应温度81.8℃,反应时间3.8h,液料比为3 mL·g-1.考察吸附时间、吸附剂用量及pH等因素对吸附过程的影响,并从热力学方面探讨了其吸附机理.结果表明:吸附过程符合Langmuir和Temkin等温吸附模型,313 K时改性荷叶对1,4-苯二酚的最大吸附量为1.384 mmol·g-1,且吸附过程是自发的吸热过程.

Abstract:: The lotus leaf chemically modified by triethylenetetramine was prepared as adsorbent to remove hydroquinone from aqueous solution.Response surface methodology was applied to optimize the experimental conditions.The optimal conditions were reaction temperature of 81.8 ℃,reaction time of 3.8 h and ratio of triethylenetramine and material of 3 mL · g-1.A series of factors affecting the adsorption process such as the contact time,adsorbent dosage and pH were investigated.The isothermal process of hydroquinone was described very well by the Langmuir and Temkin models,the maximum adsorption capacity onto modified lotus leaf was 1.384 mmol · g-1 at the temperature of 313 K.Thermodynamic parameters indicated that the adsorption process conformed to spontaneous and endothermic process.