活性炭纤维对亚甲基蓝的吸附动力学和热力学研究
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摘要
研究了活性炭纤维(ACF)对亚甲基蓝的吸附性质,并与颗粒活性炭(GAC)进行了比较。结果表明,活性炭纤维吸附量大,吸附优势明显。同时研究了活性炭纤维对亚甲基蓝的吸附热力学和动力学性质,利用Langmuir和Freundlich吸附等温模型来描述活性炭纤维对亚甲基蓝的吸附行为,相关性都较好,但Langmuir等温模型的拟合性更好。利用准一级动力学模型和准二级动力学模型考察了吸附动力学,活性炭纤维吸附亚甲基蓝的动力学曲线更符合准二级动力学模型。热力学参数△Gθ、△Hθ和△Sθ的计算结果表明,活性炭纤维吸附亚甲基蓝是自发的吸热熵增过程。
This paper studied the adsorption of methylene blue on activated carbon fiber(ACF) whose adsorption ability was compared with granular activated carbon(GAC). The results show that ACF has better performance. The adsorption of methylene blue on ACF was explored from the aspects of thermodynamics and kinetics.Langmuir and Freundlich isotherm equations were linearized to evaluate the adsorption behavior. They were both suitable to analyze the equilibrium data for the adsorption of methylene blue on ACF. But the Langmuir model fitted better. Pseudo-first-order and pseudo-second-order action models for the adsorption of methylene blue on ACF were also determined. The pseudo-second-order kinetic model provided the better correlation. The thermodynamic parameters △Gθ、△Hθand △Sθwere calculated. The result shows that the adsorption of methylene blue onto ACF is a spontaneous endothermic entropy increase process.
This paper studied the adsorption of methylene blue on activated carbon fiber(ACF) whose adsorption ability was compared with granular activated carbon(GAC). The results show that ACF has better performance. The adsorption of methylene blue on ACF was explored from the aspects of thermodynamics and kinetics.Langmuir and Freundlich isotherm equations were linearized to evaluate the adsorption behavior. They were both suitable to analyze the equilibrium data for the adsorption of methylene blue on ACF. But the Langmuir model fitted better. Pseudo-first-order and pseudo-second-order action models for the adsorption of methylene blue on ACF were also determined. The pseudo-second-order kinetic model provided the better correlation. The thermodynamic parameters △Gθ、△Hθand △Sθwere calculated. The result shows that the adsorption of methylene blue onto ACF is a spontaneous endothermic entropy increase process.
引文
[1]陈蓉,武超,王宏.超声前处理强化活性炭吸附活性艳红X-3B染料废水[J].环境工程学报,2013,7(7):2447-2452.
[2]冯亚明,郭晓玲,申国栋,等.活性碳纤维毡净化染料废水[J].合成纤维,2013,42(5):14-17.
[3]Wang Peifang,Cao Muhan,Wang Chao,et al.Kinetics and thermodynamics of adsorption of methylene blue by a magnetic graphene-carbon nanotube composite[J].Applied Surface Science,2014,290:116-124.
[4]袁勋,柳玉英,禚淑萍,等.有序介孔碳的合成及液相有机大分子吸附性能研究[J].化学学报,2007,65(17):1814-1820.
[5]郝一男,王喜明,丁立军.超声波处理文冠果果壳制备的活性炭对亚甲基蓝溶液的吸附[J].东北农业大学学报,2011,42(11):77-82.
[6]郝晓丹,魏杰,张钱丽,等.电解二氧化锰对亚甲基蓝和甲基橙染料吸附性能的研究[J].水处理技术,2013,39(3):23-27.
[7]韩彬,薛罡,荣达,等.稻草秸秆基活性炭对苯酚和亚甲基蓝的吸附性能研究[J].安徽农业科学,2009,37(7):3196-3199.
[8]Joanna Goscianska,Micha Marciniak,Robert Pietrzak.Mesoporous carbons modified with lanthanum(III)chloride for methyl orange adsorption[J].Chemical Engineering Journal,2014,247:258-264.
[9]Chen Huan,Yan Tingting,Jiang Fang.Adsorption of Cr(VI)from aqueous solution on mesoporous carbon nitride[J].Journal of the Taiwan Institute of Chemical Engineers,2014,45(4):1842-1849.
[10]李依丽,李利平,尹晶,等.污泥活性炭对次甲基蓝废水的吸附[J].环境工程学报,2013,7(8):3059-3064.
[11]杨骥,贾金平,廖黎燕.活性炭纤维在环境中的应用[J].环境化学,2006,25(3):273-276.
[12]李颖,岳钦艳,高宝玉,等.活性碳纤维对活性染料的吸附动力学研究[J].环境科学,2007,28(11):2637-2641.
[13]朱冬冬,任淑华.活性炭纤维对镉离子吸附性能的研究[J].当代化工,2013,42(10):1383-1384.
[14]张玲,李梦雪,周奇.镧铁复合吸附剂的制备及除磷性能[J].上海大学学报:自然科学版,2013,19(4):331-335.
[15]余蓉蓉,刘红岩,吴秋芳.负载工艺对ACF担载二氧化钛光催化性能的影响[J].环境工程学报,2012,6(7):2315-2320.
[16]鲁佳铭,王欣泽,沈剑,等.两种土壤对内分泌干扰物双酚A和类固醇的吸附性能[J].净水技术,2011,30(1):67-71.
[2]冯亚明,郭晓玲,申国栋,等.活性碳纤维毡净化染料废水[J].合成纤维,2013,42(5):14-17.
[3]Wang Peifang,Cao Muhan,Wang Chao,et al.Kinetics and thermodynamics of adsorption of methylene blue by a magnetic graphene-carbon nanotube composite[J].Applied Surface Science,2014,290:116-124.
[4]袁勋,柳玉英,禚淑萍,等.有序介孔碳的合成及液相有机大分子吸附性能研究[J].化学学报,2007,65(17):1814-1820.
[5]郝一男,王喜明,丁立军.超声波处理文冠果果壳制备的活性炭对亚甲基蓝溶液的吸附[J].东北农业大学学报,2011,42(11):77-82.
[6]郝晓丹,魏杰,张钱丽,等.电解二氧化锰对亚甲基蓝和甲基橙染料吸附性能的研究[J].水处理技术,2013,39(3):23-27.
[7]韩彬,薛罡,荣达,等.稻草秸秆基活性炭对苯酚和亚甲基蓝的吸附性能研究[J].安徽农业科学,2009,37(7):3196-3199.
[8]Joanna Goscianska,Micha Marciniak,Robert Pietrzak.Mesoporous carbons modified with lanthanum(III)chloride for methyl orange adsorption[J].Chemical Engineering Journal,2014,247:258-264.
[9]Chen Huan,Yan Tingting,Jiang Fang.Adsorption of Cr(VI)from aqueous solution on mesoporous carbon nitride[J].Journal of the Taiwan Institute of Chemical Engineers,2014,45(4):1842-1849.
[10]李依丽,李利平,尹晶,等.污泥活性炭对次甲基蓝废水的吸附[J].环境工程学报,2013,7(8):3059-3064.
[11]杨骥,贾金平,廖黎燕.活性炭纤维在环境中的应用[J].环境化学,2006,25(3):273-276.
[12]李颖,岳钦艳,高宝玉,等.活性碳纤维对活性染料的吸附动力学研究[J].环境科学,2007,28(11):2637-2641.
[13]朱冬冬,任淑华.活性炭纤维对镉离子吸附性能的研究[J].当代化工,2013,42(10):1383-1384.
[14]张玲,李梦雪,周奇.镧铁复合吸附剂的制备及除磷性能[J].上海大学学报:自然科学版,2013,19(4):331-335.
[15]余蓉蓉,刘红岩,吴秋芳.负载工艺对ACF担载二氧化钛光催化性能的影响[J].环境工程学报,2012,6(7):2315-2320.
[16]鲁佳铭,王欣泽,沈剑,等.两种土壤对内分泌干扰物双酚A和类固醇的吸附性能[J].净水技术,2011,30(1):67-71.