超重力场下活性炭吸附间苯二酚废水  

Adsorption of Resorcinol on Activated Carbon Under Supergravity Field

作　　者：郭芳[1,2] 刘有智 郭强[1,2] GUO Fang;LIU You-zhi;GUO Qiang(Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology,North University of China,Taiyuan 030051,China;Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering,Taiyuan 030051,China)

机构地区：[1]中北大学山西省超重力化工工程技术研究中心,山西太原030051 [2]超重力化工过程山西省重点实验室,山西太原030051

出　　处：《含能材料》2018年第4期339-345,共7页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金项目(21376229)

摘　　要：为了解决传统吸附设备存在设备体积庞大,吸附速率较小等问题,采用旋转填料床(RPB)为吸附设备,活性炭为吸附剂处理模拟含间苯二酚废水,考察了超重力因子、液体流量、温度、p H值和初始间苯二酚浓度对间苯二酚去除率的影响,测定了吸附等温平衡线及动力学数据,并在适宜操作条件下与固定床和磁力搅拌器的间苯二酚去除率进行了对比。结果表明:吸附平衡关系主要服从Freundlich模型,吸附热为14.65 k J·mol^(-1)。得到的吸附间苯二酚的适宜操作条件为:液体流量为50 L·h^(-1),超重力因子为41.30,p H值为5,温度为20℃,废水初始浓度为900 mg·L^(-1),吸附时间为2 h。在此条件下,间苯二酚去除率达到96.86%,较相同操作条件下的固定床和磁力搅拌器而言,去除率分别提高了约20%和14%。吸附过程主要符合准二级动力学方程,相同操作条件下,超重力吸附法的吸附速率常数为2.576×10-3g·mg^(-1)·min^(-1),是传统固定床吸附法与磁力搅拌器吸附法的1.626倍和1.413倍。To solve the problems of large volume and low adsorption rate of traditional adsorption equipment,the resorcinol wastewater was simulated and treated using rotating packed bed(RPB)as adsorption equipment,activated carbon as adsorbent.The effects of supergravity factor,pH value,liquid flow,temperature,and initial resorcinol concentration on the removal efficiency of resorcinol were investigated,and the adsorption isothermal equilibrium line and kinetic data were measured and the comparison with the removal efficiency of resorcinol obtained by fixed bed and magnetic strrer under approprite operating conditions were performed.Results show that the adsorption equilibrium relation mainly obeys Freundlich model,the heat of adsorption is 14.65 kJ·mol-1.The appropriate operating conditions obtained are:liquid flow of 50 L·h-1,supergravity factor 41.30,pH=5,temperature 20℃,initial concentration of wastewater of 900 mg·L-1 and adsorption time 2 h.In this case,the removal efficiency of resorcinol reaches 96.86%.Under the same operating conditions,compared with the fixed bed and magnetic stirrers,the removal efficiency by RPB increases by about 20%and 14%,respectively.The adsorption process is mainly consistent with the pseudo-second order kinetic model.The adsorption rate constant of the adsorption process reaches 2.576×10-3 which is 1.626 and 1.413 times higher than the conventional adsorption method of the fixed bed and magnetic stirrer,respectively.

关 键 词：超重力 吸附 间苯二酚 吸附速率常数 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ424.1[化学工程]