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| 1 | 颗粒改性活性氧化铝吸附除氟动力学和热力学的研究显示文摘通过对硫酸铁改性活性氧化铝颗粒(FMAA)吸附除氟的静态实验研究,得到其吸附动力学和吸附热力学描述,并进一步探讨了吸附机理和速率控制步骤。用拟一阶动力学模型、拟二阶动力学模型、Elovich模型、Boyd模型对吸附动力学实验数据进行拟合,发现所有动力学数据均符合拟二阶动力学模型,且Boyd模型拟合结果支持颗粒内扩散为动力学控制步骤的结论。采用Langmuir、Freundlich和Sips吸附等温线模型对数据进行拟合,结果显示吸附平衡数据与Sips模型相关性好,且Sips常数γ=0.712,说明FMAA上的氟离子是不均一的单层吸附。由范特霍夫方程求得吸附焓变ΔH^0=30.39 kJ/mol,且动力学实验数据与Elovich方程相关性好,说明FMAA对氟离子的吸附主要为化学吸附。 | 马培根 张海涛 丁文明 | 2019 | 北京化工大学学报(自然科学版)2019，46，3： | 9 |
| 2 | 活性炭吸附腐殖酸的分段等温吸附模拟及热力学研究显示文摘以1种商品腐殖酸(HA)为研究对象,以粉末活性炭(PAC)为吸附剂,测定了不同温度下HA在PAC上的吸附平衡。结果表明,在初始HA(以TOC表征)的质量浓度为10~65 mg/L时,较好的符合Langmuir模型,属于均质吸附。不同初始HA含量的分段吸附表明,在10~40 mg/L的低负载条件下,吸附质首先占据少量存在的非均质高活性点位,吸附平衡更好的符合Freundlich模型;在TOC的质量浓度为30~65 mg/L的较高负载条件下,高活性点位被占据,另一类大量存在于PAC表面的均质低活性点位则被利用,吸附平衡表现为均质吸附,模拟结果更符合Langmuir模型。热力学分析表明,PAC对HA的吸附是自发的放热熵减过程,吸附后液相体系中的混乱度变小。 | 余晨 何盈盈 杨立 | 2014 | 水处理技术2014，40，1： | 6 |
| 3 | 丁二酸发酵液色素的活性炭吸附过程显示文摘以丁二酸发酵液为研究体系,采用静态吸附法研究了颗粒活性炭对丁二酸发酵液色素的吸附过程;并考察了搅拌转速对活性炭吸附色素过程的影响。结果表明活性炭对色素的吸附是以物理吸附为主的吸热过程,其吸附热为12.54 kJ.mol 1,适宜的脱色温度有利于提高活性炭的利用效率,热水解吸可实现活性炭的再生;活性炭对色素的初始吸附速度随搅拌转速增加而增加;在活性炭快速吸附阶段,液膜扩散为主要控速步骤,增加搅拌转速可减少颗粒液膜层的厚度,有效扩散系数随之增加。通过考察进料对活性炭层析柱的脱色效果的影响,结果表明合适的进料流速能提过活性炭的利用率。 | 胡俊铎 洪怡 吴昊 任晓乾 姜岷 雷科 | 2012 | 化工进展2012，31，12： | 3 |
| 4 | 用棉籽壳制备的碳纤维去除饮用水中的氟化物:动力学评价(英文)显示文摘Chemically activated cotton nut shell carbons(CTNSCs)were prepared by different chemicals and they were used for the removal of fluoride from aqueous solution.Effects of adsorption time,adsorbent dose,p H of the solution,initial concentration of fluoride,and temperature of the solution were studied with equilibrium,thermodynamics and kinetics of the adsorption process by various CTNSC adsorbents.It showed that the chemically activated CTNSCs can effectively remove fluoride from the solution.The adsorption equilibrium data correlate well with the Freundlich isotherm model.The adsorption of fluoride by the chemically activated CTNSC is spontaneous and endothermic in nature.The pseudo first order,pseudo second order and intra particle diffusion kinetic models were applied to test the experimental data.The pseudo second order kinetic model provided a better correlation of the experimental data in comparison with the pseudo-first-order and intra particle diffusion models.A mechanism of fluoride adsorption associating chemisorption and physisorption processes is presented allowing the discussion of the variations in adsorption behavior between these materials in terms of specific surface area and porosity.These data suggest that chemically activated CTNSCs are promising materials for fluoride sorption. | Rajan Mariappan Raj Vairamuthu Alagumuthu Ganapathy | 2015 | Chinese Journal of Chemical Engineering2015，23，4： | 1 |
| 5 | 聚乙二醇对聚合氯化铝制备γ-Al_2O_3的影响(英文)显示文摘A polyaluminium chloride solution with high Al 13 content self-prepared was used as material for preparing the spherical γ-Al 2 O 3 by the sol-gel and oil-drop method. Polyethylene glycol with different molecular mass was used as surfactant to investigate the effect on property of γ-Al 2 O 3 . The physical property was characterized by 27 Al NMR (nuclear magnetic resonance) spectra, X-ray diffraction, FT-IR (Fourier transform infrared spectroscopy) and TG-DTA (thermogravimetric-differential thermal analysis). The results showed that surface area, pore volume and pore size of γ-Al 2 O 3 all increased with the increase of polyethylene glycol molecular mass in the experimental research range, and polyethylene glycol 10000 was the most suitable pore forming additive. γ-Al 2 O 3 with surface area of 339 m 2 ·g 1 , pore volume of 0.59 cm 3 ·g 1 and pore diameter of 6.9 nm were obtained at 450 °C. | 赵长伟 王孝年 何劲松 王园园 栾兆坤 | 2012 | Chinese Journal of Chemical Engineering2012，20，5： | 0 |
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