高强度生物质活性炭纤维对DCB废水吸附性能研究
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摘要
最优条件下制备了高强度生物质活性炭纤维(HP-ACF),通过扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)及热重分析(TGA)进行了结构表征与分析,并作为吸附材料进行DCB模拟废水处理试验研究,考察了投加量、pH、温度以及DCB初始浓度对吸附效果的影响,建立了吸附过程的吸附动力学模型。试验结果表明:(1)制备产品HP-ACF抗压强度为0.246 MPa;(2)对于浓度为20 mg/L的DCB废水,当投加量≥1g/L时,HP-ACF对DCB的去除率达到最大值98.29%;(3)当pH≤5时,有利于HP-ACF对DCB的吸附;(4)拟二级动力学方程为t/q_t=0.800+0.044 t,R~2=0.997 7,拟二级吸附模型能更好地描述HP-ACF对DCB废水的吸附过程。
Under the optimum conditions,the high-performance activated carbon fiber(HP-ACF) was prepared,characterized and analyzed by scanning electron microcscopy(SEM),Fourier transform infrared spectroscopy(FT-IR) and thermogravimetric analysis(TGA). HP-ACF was used for DCB removal in the simulated wastewater treatment experiment.The effects of dosage,p H,temperature and initial concentration on its adsorption efficiency were investigated. Also,the adsorption kinetics model was established. Results showed that the compressive strength of HP-ACF prepared from loofah sponge fiber in this experiment reached 0.246 MPa. The removing rate of DCB(20 mg/L) tended to reach the maximum value(98.29%)when the dosage was higher than 1 g/L in the wastewater. It was beneficial to the adsorption of DCB by HPACF when p H was below 5. The pseudo second order rate equation was t/q_t=0.800 +0.044 t,R~2 =0.997 7 and the pseudo second order model can well describe the DCB adsorption process by HP-ACF.
Under the optimum conditions,the high-performance activated carbon fiber(HP-ACF) was prepared,characterized and analyzed by scanning electron microcscopy(SEM),Fourier transform infrared spectroscopy(FT-IR) and thermogravimetric analysis(TGA). HP-ACF was used for DCB removal in the simulated wastewater treatment experiment.The effects of dosage,p H,temperature and initial concentration on its adsorption efficiency were investigated. Also,the adsorption kinetics model was established. Results showed that the compressive strength of HP-ACF prepared from loofah sponge fiber in this experiment reached 0.246 MPa. The removing rate of DCB(20 mg/L) tended to reach the maximum value(98.29%)when the dosage was higher than 1 g/L in the wastewater. It was beneficial to the adsorption of DCB by HPACF when p H was below 5. The pseudo second order rate equation was t/q_t=0.800 +0.044 t,R~2 =0.997 7 and the pseudo second order model can well describe the DCB adsorption process by HP-ACF.
引文
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[3]曹向禹.含联苯胺废水处理技术的研究进展[J].染料与染色,2012(4):52-55.Cao Xiangyu.The research progress of benzidine containing wastewater treatment technology[J].Dyestuffs and Coloration,2012(4):52-55.(in Chinese)
[4]Zhiqian J,Changqing Z,Qun Z,et al.Comprehensive utilization of acidic wastewater from 3,3′-dichlorobenzidine hydrochloride manufacture[J].Journal of Chemical Technology and Biotechnology,2001,76(10):1085-1090.
[5]何宝庆,吴灿灿.内电解-生化工艺处理染料废水研究[J].污染防治技术,2006,19(4):6-8.He Baoqing,Wu Cancan.Treatment of dyeing wastewater by micro-electrolysis and bio-chemical process[J].Pollution Control Technology,2006,19(4):6-8.(in Chinese)
[6]夏世斌,朱长青.微电解-生化组合处理DCB染料废水中试研究[J].三峡大学学报:自然科学版,2006,28(4):352-354.Xia Shibin,Zhu Changqing.Pilot-scale study of DCB dye wastewater treatment using biochemical and microelectrolic process[J].Journal of China Three Gorges University:Natural Science Edition,2006,28(4):352-354.(in Chinese)
[7]Chen S,Yue Q,Gao B,et al.Equilibrium and kinetic adsorption study of the adsorptive removal of Cr(Ⅵ)using modified wheat residue[J].Journal of Colloid&Interface Science,2010,349(1):256-264.
[8]王华,何玉凤,何文娟,等.纤维素的改性及在废水处理中的应用研究进展[J].水处理技术,2012,38(5).Wang Hua,He Yufeng,He Wenjuan,et al.Modification of cellulose and its application in wastewater treatment[J].Technology of Water Treatment,2012,38(5).(in Chinese)
[9]Alila S,Boufi S.Removal of organic pollutants from water by modified cellulose fibres[J].Industrial Crops&Products,2009,30(1):93-104.
[10]王迎,沈新元,邹晓蕾.丝瓜络纤维染色动力学研究[J].印染助剂,2011,28(5):23-26.Wang Ying,Shen Xinyuan,Zou Xiaolei.Dyeing kinetics of luffa fibers[J].Textile Auxiliaries,2011,28(5):23-26.(in Chinese)
[11]李军,李今.亲水改性磺酸型碳材料催化纤维素水解研究[J].环境科学与技术,2015,38(3):77-80.Li Jun,Li Jin.Catalytic hydrolysis of cellulose into reducing sugars by hydrophilic sulfonated carbon[J].Environmental Science&Technology,2015,38(3):77-80.(in Chinese)
[12]肖信彤,余云祥,徐思,等.生物质海绵基活性炭纤维制备研究[J].武汉理工大学学报,2012,34(7):67-71.Xiao Xintong,Yu Yunxiang,Xu Si,et al.Study on preparation of activated carbon fiber based on biomass[J].Journal of Wuhan University of Technology,2012,34(7):67-71.(in Chinese)
[13]谢雨,熊冰清,谢起航,等.高强度植物基活性炭纤维制备研究[J].中国水运月刊,2015,15(4):121-124.Xie Yu,Xiong Bingqing,Xie Qihang,et al.Study on preparation of high-performance activated carbon fiber based on biomass[J].China Water Transport,2015,15(4):121-124.(in Chinese)
[14]陶镇,张义,夏世斌.海绵状生物质基阴离子交换纤维制备与吸附性能研究[J].武汉理工大学学报,2012,34(6):77-81.Tao Zhen,Zhang Yi,Xia Shibin.Synthesis and adsorption properties of sponge biomass based anion exchange fiber[J].Journal of Wuhan University of Technology,2012,34(6):77-81.(in Chinese)