D301大孔吸附树脂吸附甘氨酸

通过静态吸附法研究了树脂D301对水溶液中甘氨酸的吸附行为。采用单因素实验法确定了最佳吸附条件为pH 7.5,温度35℃,时间45 min,吸附剂用量为0.1 g,在此条件下最大平衡吸附量可达794.81 mg·g^-1。同时探究了D301对甘氨酸溶液吸附的热力学行为,测得了303.15～318.15 K温度范围内的吸附等温线数据,用Langmuir、Freundlich、Temkin方程对此进行拟合,并根据热力学原理计算得到吸附过程中ΔH^θ、ΔG^θ、ΔS^θ值和吸附表观活化能。结果表明等温吸附平衡符合Langmuir等温线模型,其ΔH^θ 134.75 kJ·mol^-1,ΔG^θ-6.312 kJ·mol^-1, ΔS^θ 450.806 J·mol^-1·K^-1,E_a为81.27 kJ·mol^-1。研究结果表明D301对甘氨酸的吸附为化学吸附和物理吸附共存且为自发进行的吸热过程。     

Green synthesis of nickel nanoparticles using Ocimum sanctum and their application in dye and pollutant adsorption

Nickel nanoparticles as an eco-friendly adsorbent was biosynthesized using Ocimum sanctum leaf extract. The phys-iochemical properties of green synthesized nickel nanoparticles (NiGs) were characterized by UV–Vis spectroscopy (UV–Vis), Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). NiGs were used as adsorbent for the removal of dyes such as crystal violet (CV), eosin Y (EY), orange I (OR) and anionic pol utant nitrate (NO3?), sulfate (SO42?) from aqueous solution. Adsorption capacity of NiGs was examined in batch modes at different pH, contact time, NiG dosage, initial dye and pol utant concentration. The adsorption process was pH dependent and the adsorption capacity increased with increase in contact time and with that of NiG dosage, whereas the adsorption capacity decreased at higher con-centrations of dyes and pol utants. Maximum percentage removal of dyes and pol utants were observed at 40, 20, 30, 10 and 10 mg·L?1 initial concentration of CV, EY, OR, NO3?and SO42?respectively. The maximum adsorption capacities in Langmuir isotherm were found to be 0.454, 0.615, 0.273, 0.795 and 0.645 mg·g?1 at pH 8, 3, 3, 7 and 7 for CV, EY, OR, NO3?and SO42?respectively. The higher coefficients of correlation in Langmuir isotherm sug-gested monolayer adsorption. The mean energies (E), 2.23, 3.53, 2.50, 5.00 and 3.16 kJ·mol?1 for CV, EY, OR, NO3?and SO42?respectively, calculated from the Dubinin–Radushkevich isotherm showed physical adsorption of adsor-bate onto NiGs. Adsorption kinetics data was better fitted to pseudo-second-order kinetics with R2 N 0.870 for al dyes and pol utants. NiGs were found to be an effective adsorbent for the removal of dyes and pol utants from aque-ous solution and can be applied to treat textile and tannery effluents.     

Static and dynamic adsorption of fluoride using La(Ⅲ)-loaded chitosan beads crosslinked with EGDE

利用乙二醇二缩水甘油醚(EGDE)替代戊二醛对壳聚糖微球进行交联,然后负载稀土镧离子La(Ⅲ),制备得到新型的除氟剂（CEB-La）。研究了CEB-La对F^-的静态和动态吸附性能。静态吸附实验结果表明：该除氟剂的静态吸附条件为pH7.0、温度50℃、吸附时间60 min、振荡频率120 r·min^-1;当CEB-La用量3 g·L^-1时,对浓度10 mg·L^-1含氟水的除氟率可达92.9%;CEB-La对F^-的吸附过程符合Langmuir和Freundlich吸附等温线,饱和吸附容量为25.7 mg·g^-1;拟二级动力学方程能较好地描述CEB-La对F^-的吸附动力学过程;CEB-La吸附饱和后,经NaOH溶液处理后再与镧离子螯合,可有效再生;共存阴离子特别是CO ^{2 -}₃ 和HCO^-₃对CEB-La的除氟性能有不利影响。动态吸附实验结果表明：进水流量3 ml·min^-1时,CEB-La适于处理F^-浓度2～15 mg·L^-1的含氟水;利用Thomas模型可较好地描述CEB-La对F^-的动态吸附特征,动态饱和吸附容量为3.67 mg·g^-1。因此,CEB-La的除氟性能优越,再生方法简单,使用成本较低,具有较好的应用前景。     

萘磺酸盐分散剂在不同晶型吡唑醚菌酯颗粒表面吸附性能

通过X射线衍射仪（XRD）、差示扫描量热仪（DSC）、紫外光谱（UV）、傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）测试,研究了萘磺酸盐分散剂在两种晶型吡唑醚菌酯颗粒表面的吸附性能。两种晶型吡唑醚菌酯吸附萘磺酸盐分散剂后,晶型未发生改变;两种晶型吡唑醚菌酯吸附动力学均符合伪二级动力学方程,晶型Ⅱ E_a＝16.04 kJ·mol^-1,晶型Ⅳ E_a＝12.42 kJ·mol^-1,均为物理吸附;吡唑醚菌酯晶型Ⅱ、晶型Ⅳ吸附等温线均符合Langmuir模型,晶型Ⅱ的吸附焓变H_ad为20.64 kJ·mol^-1,吸附过程为吸热过程,温度升高有利于萘磺酸盐甲醛缩合物（D425）在晶型Ⅱ颗粒表面的吸附;晶型Ⅳ的吸附焓变H_ad为-15.26 kJ·mol^-1,吸附过程为放热过程,温度升高不利于D425在晶型Ⅳ颗粒表面的吸附。     

聚丙烯酸钠包覆Fe3O4磁性交联聚合物的制备及其对Pb(Ⅱ)和Cd(Ⅱ)的吸附性能

采用溶液分散聚合和Ca²⁺表面交联制备了聚丙烯酸钠包覆Fe₃O₄的磁性交联聚合物（CPAANa@Fe₃O₄）,对其进行了XRD、FT-IR、SEM和TGA等表征。以CPAANa@Fe₃O₄为吸附剂研究了CPAANa@Fe₃O₄对水溶液中Pb²⁺、Cd²⁺的静态吸附,考察了溶液pH、吸附剂投加量、金属离子初始浓度对吸附的影响。结果表明：CPAANa@Fe₃O₄在pH 2～6范围内均具有较好的吸附性能,当吸附剂投加量分别为1.0 g·L^-1和1.6 g·L^-1时对初始浓度分别为200 mg·L^-1的Pb²⁺和100 mg·L^-1的Cd²⁺的去除率达到最大,可使Pb²⁺实现达标排放（GB 8978-1996）;CPAANa@Fe₃O₄对Pb²⁺和Cd²⁺的吸附动力学符合准二级模型,吸附等温线符合Langmuir模型,对Pb²⁺和Cd²⁺的最大吸附量分别为454.55 mg·g^-1和275.48 mg·g^-1。将CPAANa@Fe₃O₄用于处理实际电解矿浆废水,发现能有效吸附其中的Pb²⁺和Cd²⁺,具有潜在实用价值。     

Production of carbonaceous material from avocado peel for its application as alternative adsorbent for dyes removal

Adsorption processes have received special attention for contaminants removal thanks to their capability to generate effluents with high quality as well as their simple design. In the current work, the agro-waste residue avocado peel is proposed to be used as alternative to conventional activated carbons whose use is sometimes restricted to high costs, upgraded by their exhausting after long term operations. The carbonization procedure was optimized and analyzed through factorial design and response surface methodology by evaluating temperature(400–900 °C) and time(30–90 min) effects: optimal conditions were found at 900 °C and 65 min, generating an adsorbent with 87.52 m2·g-1of BET surface area, a mesopore volume of 74% and a zero point charge at 8.6. The feasibility of the carbonaceous material was proved for the removal of a variety of dyes by investigating substrate(10–50 mg·L-1) and solid(0.5–20 g·L-1) concentration effects and statistical significance: complete removal of Naphthol Blue Black and Reactive Black 5 was reached under optimal conditions(10 mg·L-1and20 g·L-1of dye and solid, respectively), while Basic Blue 41 was eliminated by using 13.4 g·L-1of the adsorbent.Overall, dyes removal by adsorption on carbonized avocado peel is presented as a promising technology due to the low cost and easy availability of the precursor, as well as the straightforward generation, the satisfactory characteristics and the proved adsorption capacity of the adsorbent.     

向日葵秸秆对U（Ⅵ）和Cu（Ⅱ）的选择吸附特性

以分别含有单一的U（Ⅵ）、Cu（Ⅱ）溶液以及U（Ⅵ）、Cu（Ⅱ）混合溶液为吸附质,系统探讨了pH值、吸附剂量、温度、时间和初始离子浓度对向日葵秸秆吸附效果的影响。采用准二级动力学模型、Langmuir、Freundlich和Langmuir-Freundlich等温吸附模型对实验数据进行拟合,从分配系数和分离因子角度对吸附选择性进行分析,并对吸附机理进行探讨。结果表明：向日葵秸秆对U（Ⅵ）和Cu（Ⅱ）的吸附分别是自发的吸热和放热反应;吸附动力学均符合准二级动力学模型,即化学吸附为控速步骤;单离子体系下U（Ⅵ）和Cu（Ⅱ）的吸附等温线分别符合Langmuir-Freundlich和Langmuir等温吸附模型;复配体系下,当干扰Cu（Ⅱ）浓度≥60 mg·L^-1时,U（Ⅵ） 的吸附等温线可用Langmuir-Freundlich模型描述;而当干扰U（Ⅵ）浓度≥200 mg·L^-1时,Cu（Ⅱ）的吸附等温线可用Langmuir模型描述。当溶液中同时存在U（Ⅵ）和Cu（Ⅱ）两种离子时,离子间存在竞争吸附,且向日葵秸秆对U（Ⅵ）具有更高的选择性,这与金属本身的特性有关。向日葵秸秆吸附前后的SEM、EDX和FT-IR图谱表明,吸附U（Ⅵ）和Cu（Ⅱ）的主要方式为络合和离子交换。     

原料粒度对粉煤灰成型吸附剂结构和性能的影响(英文)

In this paper, different particle sizes of coal fly ash FA-R (D50=15.75μm), FA-A (D50=3.61μm) and FA-B (D50=1.73μm) were treated with NaOH solution to prepare the forming adsorbents FFA-R, FFA-A and FFA-B. The structure and adsorption properties of the forming adsorbents for methylene blue (MB) from aqueous solu-tion were examined. The results showed that the specific surface areas and adsorption capacities of the forming adsorbent for MB increased with decreasing particle size of raw coal fly ashes. The adsorption kinetic data of MB on FFA-R, FFA-A and FFA-B fitted the second-order kinetic model very wel with the rate constants (k2) of 3.15 × 10?2, 3.84 × 10?2 and 6.27 × 10?2 g·mg?1·min?1, respectively. The adsorption process was not only con-trol ed by intra-particle diffusion. The isotherms of MB on FFA-R, FFA-A and FFA-B can be described by the Lang-muir isotherm and the Freundlich isotherm, and the adsorption processes were spontaneous and exothermic. ? 2014 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. Al rights reserved.     

Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash

In this paper, different particle sizes of coal fly ash FA-R (D50=15.75μm), FA-A (D50=3.61μm) and FA-B (D50=1.73μm) were treated with NaOH solution to prepare the forming adsorbents FFA-R, FFA-A and FF...     

Adsorption characteristics of metal-capture-agent immobilized PAC for low concentration Cr(Ⅵ) in water at low temperature

针对低温微污染水中(275 K)低浓度Cr(Ⅵ)离子(0.500 mg·L^-1),制备基于表面负载食品级单宁酸为金属捕获剂的改性PAC(TA-PAC),以HNO₃、NaOH氧化改性PAC为对照,研究了TA-PAC的表面物理化学特性和吸附性能,并进行了pH影响和吸附等温线拟合研究。结果表明:TA-PAC的比表面积、总孔容积和表面极性大小最佳。TA-PAC对低温水中Cr(Ⅵ)及总铬的去除效果优于N-PAC和OH-PAC。酸性范围内(pH=3.0~6.0)TA-PAC对Cr(Ⅵ)及总铬的去除率均大于碱性范围(pH=7.0~10.0)。Freundlich 双参数吸附等温式对TA-HNC吸附水中低浓度总铬的吸附等温线拟合效果最好(R²=0.9941)。TA-PAC吸附低温水中低浓度Cr(Ⅵ)是一个极为复杂的过程,主要吸附机理可能包括表面还原作用、酯化/螯合作用和离子交换作用等。     

纳米腐殖酸动态吸附废水中镉离子及其洗脱特性

在静态法研究纳米腐殖酸吸附模拟含镉废水基础上搭建考察模拟含镉废水中镉离子在吸附剂上动态吸附及洗脱特性的吸附柱实验装置,考察镉离子溶液浓度、吸附(脱附)温度、共存离子和进料流速对穿透吸附量和饱和吸附量的影响,运用Thomas模型研究了纳米腐殖酸柱吸附过程动力学机理,测定了再生后纳米腐殖酸的穿透吸附量和饱和吸附量,结果表明:初始镉离子浓度150 mg·L^-1和流速10 ml·min^-1下,其饱和吸附量分别为426.3 mg·g^-1和405.5 mg·g^-1;Thomas模型所得饱和吸附量q_em分别为364.1、436.1和441.9 mg·g^-1;洗脱峰镉离子浓度分别为3.3、12.0和22.0 g·L^-1;共存离子SO₄^2-浓度增加,纳米腐殖酸对镉离子的穿透吸附量和饱和吸附量降低;吸附和脱附均可常温工况进行。经30次吸附和再生后,穿透吸附量和饱和吸附量无明显降低。用红外光谱仪(FT-IR)、扫描电镜(SEM)及X射线能谱仪(EDS)对纳米腐殖酸吸附再生前、后性能进行表征,结果表明:纳米腐殖酸物化性能稳定,形貌基本无变化,尺度发生一定程度减小,表面及内部的氨基、羟基等对吸附镉离子均发挥有效作用,该材料可满足重复使用。     

铁粉还原脱除电解锰阳极液中的硒

采用铁粉还原脱除电解锰阳极液中的硒,考察了各主要因素对硒脱除率的影响,研究了硒脱除过程的动力学。结果表明,锰阳极液中硒的脱除速率随反应时间、铁粉用量、反应温度的增加而增加,随硫酸用量的增加而减少。XRD与SEM分析表明,反应温度对硒渣结构影响最大,30℃反应后渣中存在Se、Fe、FeSe₂、Fe₂(SeO₄)₃4种物相,硒的结晶形态以纺锤形为主;90℃反应后渣中存在Se、FeSe₂两种形式,硒的结晶形态以球形为主。铁粉还原脱除锰阳极液中硒的动力学过程符合一级反应速率规律,属固体产物层扩散控制,表观活化能为15.94 kJ·mol^-1。     

D72树脂对镨(Ⅲ)的吸附性能(英文)

In this work, the feasibility of using a macroporous strong acid ion exchange resin (D72) as an adsorbent for praseodymium (Ⅲ) was examined. The adsorption behavior and mechanism were investigated with various chemical methods and IR spectrometry. The results showed that the loading of Pr (III) ions was strongly dependent on pH of the medium and the optimal adsorption condition is in HAc-NaAc medium with pH value of 3.0. Adsorption kinetics of Pr (III) ions onto D72 resin could be best described by pseudo-second-order model. The maximum adsorption capacity of D72 for Pr (Ⅲ) was evaluated to be 294 mg·g 1 for the Langmuir model at 298K. The apparent activation energy, E a , was 14.71 kJ·mol 1 . The calculated data of thermodynamic parameters, ΔSΘ value of 100 J·mol 1 ·K 1 and ΔHΘ value of 8.89 kJ·mol 1 , indicate the endothermic nature of the adsorption process, while a decrease of ΔGΘ with increasing temperature indicates the spontaneous nature of the adsorption process. Finally, Pr (Ⅲ) can be eluted by using 1.00 mol·L 1 HCl-0.50 mol·L 1 NaCl solution and the D72 resin can be regenerated and reused. Thomas model was successfully applied to experimental data to predict the breakthrough curves and to determine the characteristic parameters of the column useful for process design. The characterization before and after adsorption of Pr (Ⅲ) ions on D72 resin was conformed by IR.     

用椰壳制活性炭吸附去除三价铋离子(英文)

In present study,we report the preparation of coconut shell activated carbon as adsorbent and its appli-cation for Bi(Ⅲ) removal from aqueous solutions.The developed adsorbent was characterized with scanning elec-tron microscope(SEM),Fourier Transform Infrared(FTIR),C,H,N,S analyzer,and BET surface area analyzer.The parameters examined include agitation time,initial concentration of Bi(Ⅲ),adsorbent dose and temperature.The maximum adsorption of Bi(Ⅲ)(98.72%) was observed at 250 mg·L-1 of Bi(Ⅲ) and adsorbent dose of 0.7 g when agitation was at 160 r·min-1 for 240 min at(299±2) K.The thermodynamic parameters such as Gibb’s free energy(△Gθ),enthalpy(△Hθ) and entropy(△Sθ) were evaluated.For the isotherm models applied to adsorption study,the Langmuir isotherm model fits better than the Freundlich isotherm.The maximum adsorption capacity from the Langmuir isotherm was 54.35 mg?g?1 of Bi(Ⅲ).The kinetic study of the adsorption shows that the pseudo second order model is more appropriate than the pseudo first order model.The result shows that,coconut shell ac-tivated carbon is an effective adsorbent to remove Bi(Ⅲ) from aqueous solutions with good adsorption capacity.     

磷钨酸铵-海藻酸钙复合吸附剂的制备及其铷吸附热力学及动力学

杂多酸盐无机离子吸附剂对于碱金属离子具有良好吸附性能,可望用于铷的分离提取。以海藻酸钙(CaALG)为载体,对铷有良好选择性的磷钨酸铵(AWP)为活性成分,采用溶胶凝胶法制备球形复合吸附剂AWP-CaALG并优化了物料配比、CaCl₂浓度、陈化时间及干燥温度等制备条件,通过SEM、XRD、IR分析对制备产物进行了表征。通过静态吸附实验,测得吸附剂对Rb⁺吸附容量达43 mg·g^-1。实验考察了溶液中铷初始浓度、吸附温度对吸附过程的影响,分别采用Langmuir等温吸附模型、Freundlich等温吸附模型对实验数据进行线性回归分析,结果表明吸附过程更符合Freundlich等温吸附模型(R²>0.9962)。计算铷吸附过程焓变(ΔH)、熵变(ΔS)分别为-14.18 kJ·mol^-1和-0.0367 kJ·mol^-1·K^-1,不同温度下ΔG均为负值,说明该吸附过程可自发进行,低温利于吸附,升温利于解吸。吸附动力学结果表明该吸附过程符合拟二级动力学模型,且受化学反应控制。     

甲基丙烯酸接枝改性玉米芯对Cd2+的吸附及机理

以甲基丙烯酸为单体、高锰酸钾/浓硫酸为引发体系对玉米芯进行接枝改性,成功引入羧基官能团,结合扫描电镜、红外光谱和zeta电位等分析手段研究了吸附条件对玉米芯吸附Cd²⁺过程的影响及其吸附机理。结果表明,吸附过程符合Langmuir模型和准二级动力学方程,改性玉米芯对Cd²⁺的吸附主要是化学吸附过程,吸附速率是颗粒内扩散速率和膜扩散速率共同影响的结果;在pH 7、投加量为5 g·L^-1、温度为30℃、吸附时间为6 h的条件下,接枝改性玉米芯和原玉米芯对Cd²⁺的最大吸附容量分别为28.00 mg·g^-1和5.96 mg·g^-1,提高了近4倍;玉米芯对Cd²⁺的吸附是一个自发的吸热反应,温度越高,自发程度越大;接枝改性玉米芯对Cd²⁺的吸附过程中,参与反应的主要官能团有羧基、羟基、酰胺基和甲基等,吸附Cd²⁺后的接枝改性玉米芯表面出现褶皱和白色小颗粒,孔隙消失,电负性增大。     

粉煤灰源C-S-H吸附U(Ⅵ)性能及机理

以粉煤灰铝回收过程的脱硅液为原料,通过控制钙硅摩尔比的常规沉淀法制备得到大比表面积介孔C-S-H（401 m²·g^-1）,系统研究了初始浓度、投加量、pH和离子强度对C-S-H吸附U（Ⅵ）过程的影响,以及吸附的热动力学特征,并评价了C-S-H去除实际含铀废水中毒性金属的性能。结果表明,通过控制合成条件实现了低品质硅钙渣向高附加值吸附材料的转变。0.75 g·L^-1 C-S-H在pH 2仍具有较高的平衡吸附容量（q_e=67.9 mg·g^-1）,在富含CO₃^2-的碱性溶液中UO₂（H₂O）₅²⁺转变为UO₂（CO₃）₃^4-不利于带负电的C-S-H表面吸附U（Ⅵ）。当C-S-H投加量升高至2～5 g·L^-1,材料对U（Ⅵ）的吸附去除效率即能维持在相对较高水平（C[U（Ⅵ）]_initial=500 mg·L^-1,去除率88.3%～93.5%）,吸附可在数小时内达到平衡,符合拟二级动力学模型和两阶段Weber-Morris方程模型,吸附等温线符合Langmuir模型,吸附机理主要为离子交换（84.6%）和表面络合。材料对含铀废水中的U、Zn、Hg、Mn和Cd均表现出良好的吸附去除性能,因而C-S-H可成为在废水毒性金属去除方面极具应用前景的材料。     

改性超细煤粉对甲基橙的吸附行为研究

The adsorption of methyl orange onto ultrafine coal powder (UCP) and modified ultrafine coal powder (MUCP) from aqueous solutions were studied, in which the influence of contact time, dosage, temperature, pH, and methyl orange concentration in the solution were investigated. The adsorption kinetics of methyl orange by UCP and MUCP can be described by the Lagergren first-order and pseudo second-order kinetic models, respectively. The adsorption isotherms of methyl orange onto MUCP at 303, 313 and 323 K follow the Freundlich and Langmuir isotherm equation. Values of G0 for methyl orange adsorption onto MUCP are -22.55, -23.10 and -23.79 kJ•mol－1 at 303, 313, and 323 K, respectively. The values of ΔH0 and ΔS0 are -3.74 kJ•mol－1 and 61.99 J•mol－1, respectively. The adsorption process is spontaneous and exothermic.     

From pollutant to solution of wastewater pollution: Synthesis of activated carbon from textile sludge for dye adsorption

Adsorption is an important process in wastewater treatment,and conversion of waste materials to adsorbent offers a solution to high material cost related to the use of commercial activated carbon.This study investigated the adsorption behaviour of Reactive Black 5(RB5)and methylene blue(MB)onto activated carbon produced from textile sludge(TSAC).The activated carbon was synthesized through chemical activation of precursor followed with carbonization at 650°C under nitrogen flow.Effects of time(0–200 min),pH(2–10),temperature(25–60°C),initial dye concentration(0–200 mg·L~(-1)),and adsorbent dosage(0.01–0.15 g)on dye removal efficiency were investigated.Preliminary screening revealed that TSAC synthesized via H_2SO_4activation showed higher adsorption behaviour than TSAC activated by KCl and ZnCl_2.The adsorption capacity of TSAC was found to be 11.98 mg·g~(-1)(RB5)and 13.27 mg·g~(-1)(MB),and is dependent on adsorption time and initial dye concentration.The adsorption data for both dyes were well fitted to Freundlich isotherm model which explains the heterogeneous nature of TSAC surface.The dye adsorption obeyed pseudo-second order kinetic model,thus chemisorption was the controlling step.This study reveals potential of textile sludge in removal of dyes from aqueous solution,and further studies are required to establish the applicability of the synthesized adsorbent for the treatment of waste water containing toxic dyes from textile industry.     

Al-MCM-41介孔分子筛吸附喹啉的性能

在碱性条件下,采用水热晶化法,以偏硅酸钠为硅源,铝酸钠为铝源,CTAB为结构模板剂,成功合成出了含铝介孔分子筛Al-MCM-41。采用XRD、BET等手段对合成的Al-MCM-41进行表征,对柴油中的氮化物喹啉进行了吸附实验,考察了Al-MCM-41介孔分子筛对氮化物喹啉的吸附能力,探究了硅铝比为60的Al-MCM-41分子筛对喹啉溶液吸附的热力学和动力学行为,测得353.15～393.15 K 温度范围内的吸附等温线数据,用Langmuir、Freundlich方程对此进行拟合,并根据热力学原理计算得到吸附过程中的ΔH、ΔG、ΔS值和吸附表观活化能。结果表明, 硅铝比为60的Al-MCM-41具有较大的孔容、比表面积和较窄的孔径分布,结晶度和有序性高。等温吸附平衡符合Freundlich 等温线模型,其ΔH -0.7682 kJ·mol^-1,ΔG -28.1215 kJ·mol^-1, ΔS 73.2434 J·mol^-1·K^-1,吸附动力学符合Pseudo拟二级方程,E_a为2.8575 kJ·mol^-1。