以高温活化的沙柳为生物吸附剂对模拟废水中的苯酚进行吸附性能研究。通过单因素实验,考察了活化温度、活化时间、吸附剂投放量、苯酚pH、吸附时间、初始浓度、绝对温度等对吸附性能的影响,并对等温吸附特征、吸附动力学和热力学进行了系统研究。结果表明:在活化温度400℃、活化时间2h、吸附剂投加量2g/L、苯酚溶液pH为6～7时,吸附1h后,苯酚最大吸附量为243.90mg/g。该吸附过程更符合Freundlich等温吸附模型和准二级动力学方程,其吸附过程的自由能变值小于0,吸附过程的焓变值小于0,为自发放热过程。研究表明,活化后的沙柳可用于去除废水中的苯酚,是一种前景广阔的含油废水生物处理材料。
Salix psammophila has been activated and used as adsorbent to remove phenol in aqueous solution.The effect parameters including activation temperature,activation time,pH,dosage,contact time and temperature on the adsorption properties of phenol on salix psammophila were investigated.The results showed that the maximum adsorption capacity can reach 243.90 mg/g at the conditions of activation temperature 400℃,activation time 2 h,initial phenol concentration of 2g/L and pH 6～7.Adsorption data were well described by Freundlich models.The kinetics illustrated that the adsorption of phenol on salix psammophila fit the pseudo second-order model.The thermodynamic parameters indicated that the adsorption of phenol on salix psammophila was exothermic and spontaneous.Salix psammophila was a promising biological material for removing phenol in aqueous solution.
[1] Li Y H,Du Q J,Liu T G,et al.Equilibrium,kinetic and thermodynamic studies on the adsorption of phenol onto graphene[J].Materials Research Bulletin,2012,47:1898-1904.
[2] Liu K,Lu J H,Ji Y F.Formation of brominated disinfection by-products and bromate in cobalt catalyzed peroxymonosulfate oxidation of phenol[J].Water Research,2015,84:1-7.
[3] 杨晓霞,郭延红,郑小峰,等.活性炭的制备及其对苯酚的吸附[J].环境工程学报,2016,10(1):7030-7034.
[4] Sun S,Wang W,Zhang L,et al.Visible light-induced photocatalytic oxidation of phenol and aqueous ammonia in flower like Bi2Fe4O9 suspensions[J].Journal of Physical Chemistry C,2009,113:12826-12831.
[5] Park Y,Skelland A H P,Forney L J,et al.Removal of phenol and substituted phenols by newly developed emulsion liquid membrane process[J].Water Research,2006,40:1763-1772.
[6] Wu Z,Zhou M.Partial degradation of phenol by advanced electrochemical oxidation process[J].Environmental Science and Technology,2001,35:2698-2703.
[7] Juang R S,Huang W C,Hsu Y H.Treatment of phenol in synthetic saline wastewater by solvent extraction and two-phase membrane biodegradation[J].Journal of Hazardous Materials,2009,164:46-52.
[8] Li J M,Meng X G,Hu C W,et al.Adsorption of phenol,p-chlorophenol and p-nitrophenol onto functional chitosan[J].Bioresource Technology,2009,100:1168-1173.
[9] Froehner S,Martinsa R F,Frukawa W,et al.Water remediation by adsorption of phenol onto hydrophobic modified clay[J].Water Air Soil Pollut,2009,199:107-113.
[10] Roostaei N,Tezel F H.Removal of phenol from aqueous solutions by adsorption[J].Journal of Environmental Management,2004,70:157-164.
[11] Kumar S,Zafar M,Prajapati J K,et al.Modeling studies on simultaneous adsorption of phenol and resorcinol onto granular activated carbon from simulated aqueous solution[J].Journal of Hazardous Materials,2011,185:287-294.
[12] 唐文清,李小明,曾荣英,等.炭化百合杆对废水中苯酚的吸附[J].环境工程学报,2012,6(12):4345-4349.
[13] 刘晓红,王芳,王任震,等.核桃果皮基活性炭对苯酚吸附的热力学研究[J].安全与环境学报,2015,15(4):236-239.
[14] 龚正君,张志鹏,陈钰.改性花生壳对苯酚的吸附[J].环境工程学报,2012,6(10):3591-3596.
[15] 张敬华,崔运启,高利,等.改性麦壳对水中苯酚的生物吸附作用[J].化学通报,2013,76(8):753-757.
[16] 王红红,王欣.沙柳平茬机研究现状及发展方向[J].林业机械与木工设备,2017,3:13-15.
[17] 宋江湖,韩宇平,封斌.榆林市沙柳资源现状及产业发展研究[J].陕西林业科技,2011,3:26-28:36.
[18] 张桂兰,鲍咏泽,苗雅文.沙柳活性炭对亚甲基蓝的吸附动力学和吸附等温线研究[J].林产化学与工业,2014,6:129-134.
[19] 杨晓霞,郑小峰,郭延红.枣核活性炭对罗丹明B吸附性能的研究[J].离子交换与吸附,2016,4:341-350.
基金资助
陕西省科技厅资助,陕西省工业科技攻关项目(2016GY-245);榆林市科技局资助,榆林市产学研项目(2015LXY21)
PDF
(1387KB)
