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Journal articles on the topic 'Adsorption kinetics and isotherms'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Wang, Jianhong, Qi Zhang, Hao Yang, and Congzhen Qiao. "Adsorptive Desulfurization of Organic Sulfur from Model Fuels by Active Carbon Supported Mn (II): Equilibrium, Kinetics, and Thermodynamics." International Journal of Chemical Engineering 2020 (June 16, 2020): 1–12. http://dx.doi.org/10.1155/2020/2813946.

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Mn (II)/AC adsorbents were prepared by ultrasonic impregnation. The 2 wt. % Mn/AC showed best adsorptive performance, and the optimal adsorption temperature was 313 K. Benzene, methylbenzene, and naphthalene were used to explore the adsorptive selectivity of Mn/AC, indicating that Mn could enhance the adsorptive capacity but could not improve the adsorptive selectivity. The adsorptive mechanism was mostly like to be π-complex. Adsorptive isotherms and kinetics were investigated, and the parameters were calculated. The R2, RMSE, and AICc were used to assess the optimal model. The results showed

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Ammar, Saad H., and Sama Ali Jaafar. "Adsorption Kinetic and Isotherms Studies of Thiophene Removal from Model Fuel on Activated Carbon Supported Copper Oxide." Iraqi Journal of Chemical and Petroleum Engineering 18, no. 2 (2017): 83–93. http://dx.doi.org/10.31699/ijcpe.2017.2.7.

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In the present study, activated carbon supported metal oxides was prepared for thiophene removal from model fuel (Thiophene in n-hexane) using adsorptive desulfurization technique. Commercial activated carbon was loaded individually with copper oxide in the form of Cu2O/AC. A comparison of the kinetic and isotherm models of the sorption of thiophene from model fuel was made at different operating conditions including adsorbent dose, initial thiophene concentration and contact time. Various adsorption rate constants and isotherm parameters were calculated. Results indicated that the desulfuriza

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3

Samarghandy, Mohammad Reza, Edris Hoseinzade, Mahmood Taghavi, and Saman Hoseinzadeh. "Biosorption of Reactive Black 5 from aqueous solution using acid-treated biomass from potato peel waste." BioResources 6, no. 4 (2011): 4840–55. http://dx.doi.org/10.15376/biores.6.4.4840-4855.

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The goal of this study was to survey the feasibility of the biosorption of Reactive Black 5 (RB5) from aqueous solutions using biomass prepared from potato peel waste. Adsorption isotherms were constructed, and the kinetics of dye adsorption were studied. Langmuir and Freundlich isotherms were constructed, and pseudo-first order, pseudo-second order, and modified pseudo-first order kinetic models were studied. Maximum adsorption (85.5%) was observed at a pH of 3, and uptake decreased with increasing pH. The biosorption of RB5 increased with increasing contact time and reached equilibrium after

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4

Heraldy, Eddy, Sri Juari Santosa, Triyono Triyono, and Karna Wijaya. "Anionic and Cationic Dyes Removal from Aqueous Solutions by Adsorption onto Synthetic Mg/Al Hydrotalcite-Like Compound." Indonesian Journal of Chemistry 15, no. 3 (2015): 234–41. http://dx.doi.org/10.22146/ijc.21190.

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The current investigation reports an effective adsorption of both anionic species and cationic dyes on Mg/Al hydrotalcite-like compounds (Mg/Al HTlc) synthetic from brine water, as novel, inexpensive available alternative to the commercial hydrotalcite. The feasibility of the Mg/Al HTlc, for the adsorptive removal of both anionic (Eosin Yellow-EY and Methyl Orange-MO) and cationic (Methylene blue-MB) dyes from aqueous solution was evaluated in a batch process. Dyes adsorption process was thoroughly studied from both kinetic and equilibrium points of view for all adsorbents. The adsorption kine

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Tay, Turgay, Murat Erdem, Burak Ceylan, and Selhan Karagöz. "Adsorption of methylene blue from aqueous solution on activated carbon produced from soybean oil cake by KOH activation." BioResources 7, no. 3 (2012): 3175–87. http://dx.doi.org/10.15376/biores.7.3.3175-3187.

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This study presents the adsorption behavior of the methylene blue (MB) dye onto the activated carbon produced from soybean oil cake by chemical activation with KOH at 800 °C. The adsorption isotherms, kinetic models, and thermodynamic parameters of the adsorption were studied. The Langmuir isotherm showed a better fit than the Freundlich isotherm. The adsorption rate was described by pseudo-second-order kinetics. The negative values of ΔG° and the positive values of ΔH° indicate that the adsorption of MB was favored and endothermic.

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6

Zor, Sibel. "Investigation of the adsorption of anionic surfactants at different pH values by means of active carbon and the kinetics of adsorption." Journal of the Serbian Chemical Society 69, no. 1 (2004): 25–32. http://dx.doi.org/10.2298/jsc0401025z.

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In this study, the effect of pH on the removal of anionic surfactants, such as linear alkyl benzene sulfonate (LABS) and dodecyl benzene sulfonate (DBS) bymeans of adsorption by activated carbon was investigated. For this purpose activated carbon was used as adsorbent. Anionic surfactant solutions with initial pH values of 3, 6, 8 and 12 were used. The adsorption isotherms for the adsorption of anionic surfactants by active carbon at different pH were determined. These adsorption isotherms were seen to be consistent with Freundlich?s adsorption isotherm. k and n constants were determined from

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7

Berez, A., F. Ayari, N. Abidi, G. Schäfer, and M. Trabelsi-Ayadi. "Adsorption-desorption processes of azo dye on natural bentonite: batch experiments and modelling." Clay Minerals 49, no. 5 (2014): 747–63. http://dx.doi.org/10.1180/claymin.2014.049.5.10.

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AbstractThe purpose of this study was to determine whether a bentonite from the Gafsa deposit (western Tunisia) could be used to remove the Foron Blue 291 (FB) azo dye from wastewater. Batch adsorption and desorption experiments were conducted using untreated and purified bentonite and the influence of contact time, pH, adsorbent mass and temperature of the dye solution on the adsorption of FB was evaluated. Kinetic and isotherm data were fitted using two non-linear kinetic and two non-linear isotherm equations. In addition, the fits were evaluated using the coefficient of determination (R2) a

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8

Luo, Li Jun, Ping Bao Ban, Xue Jiao Huang, and Jun Hong Li. "Functionalized Mesporous Silica with Ethylenediamine for Removal of Pb(II)." Applied Mechanics and Materials 395-396 (September 2013): 610–14. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.610.

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Amine-functionalized mesporous silicas ((referred as NH2MS)) were synthesized by grafting with ethylenediamine. The obtained materials have been characterized by N2 adsorption desorption measurement (BET). Adsorption behaviors of the adsorbent for lead (containing effects factors, kinetics, isotherms, thermodynamics) were investigated. The result indicated that the obtained particles possessed mesoporous structrure. The Pb (II) adsorption isotherm and kinetic data fit Freundlich model and the pseudo second-order kinetic model respectively. the adsorption of Pb (II) onto NH2-MS was an enothermi

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9

He, Hua Ling, Zhi Cai Yu, and Peng Liang. "Adsorption of Acid Red G Dye from Solutions by Raw Bentonite and Bentonite-Cationic Starch Composite." Advanced Materials Research 821-822 (September 2013): 540–44. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.540.

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The adsorption of acid red G dye onto raw bentonite/cationic starch (RB/CS) and raw bentonite (RB) was investigated in aqueous solution in a bath system with respect to the adsorption kinetics and adsorption isotherms, respectively. For RB and RB/CS composite, the kinetic data showed that the kinetics of adsorption was best described by a pseudo-second-order expression than the pseudo-first-order. Adsorption isotherms of acid red G dye onto RB and RB/CS composite were determined with common isotherm equations such as the Langmuir and Freundlich models. The results showed that for RB/CS composi

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10

Usman, A., S. O. Osuegba, and S. Mamman. "Deep Eutectic Solvent-Magnetite Hybrid Composite for Effective Removal of Zinc (II) Ions from Industrial Wastewater." Journal of Applied Sciences and Environmental Management 28, no. 9 (2024): 2831–37. http://dx.doi.org/10.4314/jasem.v28i9.27.

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Zinc is one of the important trace element, but its high amount in aquatic bodies is detrimental to health. Hence, the objective of this paper was to synthesize deep eutectic solvent (DES) nanoparticles and evaluate their adsorption behavior for the removal of zinc (II) ions from industrial wastewater using appropriate standard techniques. The pseudo-first-order and pseudo-second-order models were utilised to investigate the adsorption kinetics, and the Freundlich and Langmuir isotherms were employed to assess the adsorption isotherms. The results of the kinetic study shows that the adsorption

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Amrulloh, Hanif. "Studi Adsorpsi Rhodamin B Menggunakan Silika Sekam Padi." JURNAL INOVASI PENDIDIKAN DAN SAINS 3, no. 3 (2022): 159–64. http://dx.doi.org/10.51673/jips.v3i3.1174.

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Silica was obtained from rice husk throught an extraction process and applied to remove Rhodamine B (RhB) from aqueous media by adsorption. The better characteristics of the silica were demonstrated by X-ray diffraction, N2 adsorption isotherms and scanning electron microscopy. Silica was used as adsorbent to remove RhB dye in aqueous media. Adsorption kinetics and isotherms were evaluated. Silica presented higher values of surface area, pore volume, pore diameter and porosity. Pseudo-second order was adequate to represent the kinetic profile. The adsorption isotherm follows the Langmuir and F

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12

Fajman, Vratislav, and Zdeněk Sedláček. "Kinetics of adsorption of heptane on active carbon supersorbon." Collection of Czechoslovak Chemical Communications 54, no. 12 (1989): 3117–23. http://dx.doi.org/10.1135/cccc19893117.

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Kinetics of the adsorption of heptane under different pressures and at different temperatures has been studied. Correlation of data according to a second-order equation was used to calculate half-time of adsorbate transport in pores. The correlation equation involves the effect of the pressure in pores for one component adsorption. The half-time was calculated from the whole course of kinetic isotherm. The empirical two-constant dependence of the half-time on pressure can be used to determine the possible mechanism of adsorbate transport in pores. In the adsorbent-adsorbate system studied the

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13

Mazumder, AZM Mainul Islam, Chowdhury Raihan Bikash, Md Ataur Rahman, and Md Mufazzal Hossain. "A Comparative Study for Adsorptive Removal of Remazol Red R and Remazol Black B from Aqueous Solution by ZnO." Dhaka University Journal of Science 66, no. 2 (2018): 121–27. http://dx.doi.org/10.3329/dujs.v66i2.54555.

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Adsorptive removal of remazol red R (RRR) and remazol black B (RBB) from aqueous solution has been investigated by using ZnO as an adsorbent. Time for adsorption equilibrium, kinetics of adsorption at different initial concentrations of dyes and adsorption isotherms at different temperatures have been studied. Adsorption capacity increased with increasing initial dye concentration. The pseudo first-order and pseudo second-order kinetics were used to describe kinetic data and the rate constants were evaluated. Experimental data fits better in the pseudo second-order kinetic model than in the ps

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14

Musah, Monday, Yakubu Azeh, John Mathew, Musa Umar, Zulaihat Abdulhamid, and Aishetu Muhammad. "Adsorption Kinetics and Isotherm Models: A Review." Caliphate Journal of Science and Technology 4, no. 1 (2022): 20–26. http://dx.doi.org/10.4314/cajost.v4i1.3.

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Adsorption Kinetics describes the rate at which solute is adsorbed and the resident time of the adsorbates on the solid-liquid interface. Adsorption isotherms play important role in determining the interaction between adsorbate and adsorbent and the optimum adsorption capacity of adsorbent. This article considered selected adsorption kinetics and isotherms models. Pseudo first order, Pseudo second order, Elovich, Bhattacharya and Venkobachar, and Natarajan and Khalaf were adsorption kinetics reviewed on the assumption that the process behaves as heterogeneous reaction at solid-liquid interface

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15

Li, Zhongmin, Wanwan Wu, Wenyan Jiang, Guangtao Wei, Yunshang Li, and Linye Zhang. "Adsorption of Ni(II) by a thermo-sensitive colloid: methylcellulose/calcium alginate beads." Journal of Water Supply: Research and Technology-Aqua 68, no. 7 (2019): 495–508. http://dx.doi.org/10.2166/aqua.2019.141.

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Abstract The adsorption of Ni(II) by a thermo-sensitive adsorbent of methylcellulose/calcium alginate beads (CAMCBs) was studied using batch adsorption tests to determine the adsorption process and properties, the effects of adsorbent dosage, initial concentration, adsorption time and temperature. The adsorption process was further investigated using kinetics, isotherms and thermodynamic methods. The kinetics and isotherms studies showed the adsorption of Ni(II) on CAMCBs was fitted by the pseudo-second-order kinetic model and Langmuir isothermal adsorption model, respectively. The thermodynam

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16

Xu, Hong Ying, and Chan Zhang. "Kinetic and Equilibrium of Biosorption of Methylene Blue by Anaerobic Granular Sludge in Wastewater." Advanced Materials Research 550-553 (July 2012): 2291–95. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2291.

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With anaerobic granular sludge as adsorbent, the adsorption kinetics and thermodynamics of methylene blue (MB) from aqueous solution was studied by batch adsorption technique.The pseudo-first order, pseudo- second order models and Langmuir, Freundlich isotherms models were used to describe the kinetic data.The experimental results show that the anaerobic granular sludge had strong and fast speed adsorption capacity for MB adsorption in wastewater. The adsorption equilibrium could be reached in 2h, and the maximum adsorption rate was 98.6%. the pseudo-second order equation is the best model tha

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17

Wang, Yixi, Linyan Zhao, Juan Hou, et al. "Kinetic, isotherm, and thermodynamic studies of the adsorption of dyes from aqueous solution by cellulose-based adsorbents." Water Science and Technology 77, no. 11 (2018): 2699–708. http://dx.doi.org/10.2166/wst.2018.229.

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Abstract In this study, a highly efficient and eco-friendly porous cellulose-based aerogel was synthesized by grafting polyethyleneimine onto quaternized cellulose (PQC) to remove the anionic dye Congo Red (CR). The prepared aerogel had a good flexibility and formability. The adsorbents were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and elemental analysis. The results showed that there were many amino groups on CE/PQC aerogel and the structure was porous, which increased the adsorption capacity. The effects of initial concentration, ads

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18

Chen, Jianlong, and Xinwei Lu. "Equilibrium and kinetics studies of Cd(II) sorption on zeolite NaX synthesized from coal gangue." Journal of Water Reuse and Desalination 8, no. 1 (2016): 94–101. http://dx.doi.org/10.2166/wrd.2016.137.

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Abstract The adsorption of Cd(II) from aqueous solution by synthesized zeolite NaX from coal gangue was investigated in a batch adsorption system. The studies include both equilibrium adsorption isotherms and kinetics. Different isotherm models were examined and the adsorption isotherm could be best represented with Langmuir. The adsorption kinetic experimental data were found to be better fitted with the pseudo-second-order kinetic model. An intra-particle diffusion model was employed to investigate the adsorption mechanism. The results showed that the intra-particle diffusion step was not th

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19

Duan, Xinhui, C. S. Kannan, Chengcheng Zhang, and Xin Wang. "Waste walnut shell valorization to iron loaded biochar and its application to arsenic removal." Resource-Efficient Technologies, no. 1 (March 12, 2017): 29–36. http://dx.doi.org/10.18799/24056529/2017/1/111.

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Iron loaded biochar (ILB) was prepared from waste walnut shell by microwave pyrolysis and its application for arsenic removal was attempted.The ILB was characterized using X-ray diffraction, scanning electron microscopy and BET Surface area analyzer. The adsorption isotherm of As(V) in ILB covering a temperature range of 25 to 45 °C, as well as the kinetics of adsorption at 25 °C were experimentally generated. Theadsorption isotherms were modeled using Langmuir and Freundlich isotherm models, while the kinetics of adsorption was modeled using thepseudo-first-order, pseudo-second-order kinetic

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20

Fang, Z. Q., and H. J. Huang. "Adsorption of Di-N-butyl Phthalate onto Nutshell-Based Activated Carbon. Equilibrium, Kinetics and Thermodynamics." Adsorption Science & Technology 27, no. 7 (2009): 685–700. http://dx.doi.org/10.1260/0263-6174.27.7.685.

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The adsorption of di-n-butyl phthalate (DBP) from aqueous solution was studied in a batch adsorption system. Activated carbons from coals, coconut shell and nutshell were evaluated to determine the most effective adsorbent. Kinetic and equilibrium studies were investigated at various initial DBP concentration (3–6 mg/ℓ), adsorbent dosage (40–140 mg/ℓ), suspension pH (3–9) and temperature (25–55 °C). Equilibrium adsorption isotherms were analyzed using the Langmuir, Freundlich and Temkin models. The experimental isotherms were S-type, with the Freundlich isotherm giving a good description of th

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Huang, Hui, Jingang Yu, Wei Liu, and Xinyu Jiang. "Amino-Functionalized Multi-Walled Carbon Nanotubes as Novel Adsorbents for Selective Adsorption of Anionic Dyes in Aqueous Solution." Nano 10, no. 05 (2015): 1550065. http://dx.doi.org/10.1142/s1793292015500654.

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In this study, amino-functionalized multi-walled carbon nanotubes ( MWCNTs - NH 2) were successfully synthesized via an improved method and used for removal of organic dyes in aqueous solution. The synthesized MWCNTs - NH 2 were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscope (SEM), etc. The adsorption capacity and selectivity of MWCNTs - NH 2 for organic dyes was evaluated using rhodamine B ( RhB ), malachite green (MG), methyl orange (MO) and congo red (CR) as models. The selective adsorption toward anionic dyes

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22

Hastuti, Budi, Mudasir Mudasir, Dwi Siswanta, and Triyono Triyono. "Preparation and Pb(II) Adsorption Properties of Crosslinked Pectin-Carboxymethyl Chitosan Film." Indonesian Journal of Chemistry 15, no. 3 (2015): 248–55. http://dx.doi.org/10.22146/ijc.21192.

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A modified pectin has been synthesized by reacting/combining -OH group among pectin and chitosan with BADGE (Bisphenol A diglycidyl ether) crosslinker agent. The structure and morphology of the new material were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and X-ray Diffraction (XRD) analysis. Thermogravimetric studies showed an improvement in thermal characteristic. Adsorption experiments were performed in batch processes; sorption isotherms and kinetics were also studied. The Langmuir and Freundlich adsorption isotherm models were applie

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23

KOYUNCU, MENDERES. "Adsorption, kinetics, and thermodynamic study of dyeing the Scutellaria Orientalis L as an eco-friendly natural colourant on cotton fabric." Industria Textila 75, no. 02 (2024): 203–11. http://dx.doi.org/10.35530/it.075.02.202310.

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The adsorption isotherm, thermodynamic parameter, and kinetics study for dyeing without mordanting cotton fabric dyed with natural dye obtained from an aqueous extract of the Scutellaria Orientalis were investigated using, as optimal conditions, at pH of 5 a material to liquor ratio (MLR) of 1:100, an initial dye concentration of 1.0/l and contact time (20–90 min.). The effect of the temperature and dyeing time (from 20–90 min.) on dyeing was evaluated using three different temperatures (from 60, 80, and 90°C). Also, the adsorption isotherms have been analyzed by Langmuir and Freundlich models

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24

Kulkarni, Kavita, Anand Kulkarni, and Poonam Bodare. "Removal of Rhodamine-B dye from Aqueous Solution using Biofertilizer containing Trichoderma viride as Low Cost Adsorbent." Asian Journal of Chemistry 31, no. 10 (2019): 2291–97. http://dx.doi.org/10.14233/ajchem.2019.22160.

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Trichoderma viride mixed with biofertilizer as low cost adsorbent was evaluated for the adsorptive removal of Rhodamine B dye from aqueous solution. To study the effect of contact period, pH, agitation time, temperature, adsorbent amount and initial dye concentration batch adsorption experiment was performed. Kinetic study and adsorption isotherms were used to estimate experimental data and it was found that Freundlich isotherm model and kinetics of pseudo-second-order best fitted to the experimental data. The experimental results and separation factor RL concluded that Trichoderma viride pres

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25

Gamoudi, S., N. Frini-Srasra, and E. Srasra. "Kinetic and equilibrium studies of fluoride sorption onto surfactant-modified smectites." Clay Minerals 47, no. 4 (2012): 429–40. http://dx.doi.org/10.1180/claymin.2012.047.4.03.

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AbstractThe use of organoclays as adsorbents in the remediation of polluted water has been the subject of many recent studies. In the present work, a Tunisian smectite modified with two cationic surfactants was used as an adsorbent to examine the adsorption kinetics, isotherms and thermodynamic parameters of fluoride ions from aqueous solution. Various pH values, initial concentrations and temperatures have been tested. Two simplified kinetic models, first-order and pseudo-second-order, were used to predict the adsorption rate constants. It was found that the adsorption kinetics of fluoride on

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Yang, Zi Ze, Wang Xiao, Chun Ma, Li Hua Lv, Chun Yan Wei, and Byung Gil Min. "Kinetics and Thermodynamics of Cd(II) Sorption onto Sodium Alginate/Poly(Vinyl Alcohol)/Hydroxyapatite Composite Fiber." Materials Science Forum 743-744 (January 2013): 480–85. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.480.

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In this paper, the sodium alginate (SA)/poly (vinylalcohol)(PVA)/hydroxyapatite (HAp) fiber was prepared via solution spinning. The adsorption properties of SA/PVA/HAp composite fiber were studied,and the adsorption kinetics and isotherms were investigated. The experimental results showed that the adsorption process was fast, in which half-equilibrium and equilibrium was obtained in 5 and 30 minutes, respectively. The pseudo-second-order kinetic model provided a better correlation of the experimental results. Both of Langmuir isotherm and Freundlich isotherm could describe the adsorption behav

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27

Chatterjee, Arobindo, and Vinit Kumar Jain. "Isothermal, Kinetic, and Thermodynamic Studies of Graphene Oxide Adsorption on Silk." AATCC Journal of Research 8, no. 5 (2021): 18–29. http://dx.doi.org/10.14504/ajr.8.5.3.

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The properties of graphene enriched silk depend on the amount of graphene oxide (GO) adsorption on silk. GO dipping parameters include the GO solution pH, initial GO concentration, dipping time and temperature, and the type of substrate. The effects of GO dipping parameters on the sorption process are studied to achieve the maximum GO adsorption on the silk surface for the preparation of an economical graphene/silk-based textile product. In addition, equilibrium isotherms, kinetics, and thermodynamics of GO adsorption on the silk surface in a batch sorption process are examined to understand t

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Liu, Juan, Jin Chang Liu, Xin Yao, and Qiang Xie. "Thermodynamic Study on the Adsorption of Nickel Ion onto Activated Carbons." Materials Science Forum 743-744 (January 2013): 551–59. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.551.

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The adsorption isotherms and kinetics of nickel ion onto commercial activated carbons were determined and investigated under different temperature and initial pH in solution. The pore size distribution, specific surface area and functional groups of activated carbons were characterized by N2 adsorption isotherms and Boehm titration. The results showed that the nickel ion adsorption property of activated carbon from precursors including anthracite, long flame coal, lignite and coconut were 4.9, 3.4, 4.1, 5.2mg/g, respectively. There was no obvious correlation with surface area, total volume or

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Abas, Siti Nur Aeisyah, Mohd Halim Shah Ismail, Shamsul Izhar Siajam, and Mohd Lias Kamal. "Comparative Study on Adsorption of Pb(II) Ions by Alginate Beads and Mangrove-Alginate Composite Beads." Advanced Materials Research 1113 (July 2015): 248–54. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.248.

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The aim of the present study report on the adsorption performance of alginate bead (AB) and mangrove-alginate composite bead (MACB) bead adsorbents for the removal of Pb(II) ions from aqueous solution. The effects of pH and initial concentration with contact time on the adsorption properties of Pb(II) onto both adsorbent were investigated and were described by isotherm and kinetic studies. The isotherm adsorption data were fitted well to Freundlich isotherms for both beads and the maximum adsorption capacities of the AB and MACB beads were 29.02 mg g-1 and 10.84 mg g-1, respectively. The kinet

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Feng, Zhi Biao, Ren Jiao Han, and Jing Long Wang. "Studies on Adsorption of Tyrosine on Multi-Wall Carbon Nanotubes." Advanced Materials Research 179-180 (January 2011): 1396–401. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.1396.

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The thermodynamics and kinetics properties and mechanism of sorption process were studied for adsorpting tyrosine in aqueous solution with multi-wall carbon nanotubes (MWCNTs), and the adsorption isotherms at different temperatures were determined. The results showed that the adsorption of the tyrosine in aqueous solution obeys well with the Freundlich isotherm, The thermodynamic parameters indicated that the adsorption reaction was a spontaneous, exothermal and decreasing entropy process,and the adsorption process had an obvious physisorption characteristic.The pseudo-second-order equation pr

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Mu, Jin Xia, Ming Juan Shi, Xiao Ying Wu, and Jin Ye Li. "Adsorptive Removal of Methylene Blue by Ginkgo Leaf Powder." Applied Mechanics and Materials 130-134 (October 2011): 829–32. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.829.

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The adsorption of methylene blue (MB) from aqueous solution using a low-cost adsorbent, ginkgo leaf powder, has been studied. The equilibrium data were fitted to Langmuir and Freundlich isotherms and the equilibrium adsorption was best described by the Langmuir isotherm model with maximum monolayer adsorption capacities found to be 39 mg/g. The sorption was analyzed using pseudo-first-order and pseudo-second order kinetic models, and the sorption kinetics was found to follow a pseudo-second order kinetic model. Ginkgo leaf appears as a prospective adsorbent for the removal of methylene blue fr

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Ilic, Irena, Natasa Jovic-Jovicic, Predrag Bankovic, et al. "Adsorption of nicotine from aqueous solutions on montmorillonite and acid-modified montmorillonite." Science of Sintering 51, no. 1 (2019): 93–100. http://dx.doi.org/10.2298/sos1901093i.

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Montmorillonite (Mt) and acid modified montmorillonite (MtA) were tested as nicotine adsorbents. The samples were characterized using FT-IR spectroscopy and low temperature nitrogen physisorption. Nicotine adsorption was performed with respect to contact time, pH and initial nicotine concentration. The kinetics of adsorption obeyed the pseudo-second-order kinetics. The optimal pH values for nicotine adsorption were 6 and 9 for Mt and MtA, respectively. The isotherms related to adsorption on Mt at pH = 6 and 9 as well as for MtA at pH=6 were best fitted with Sips isotherm model, while adsorptio

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Wu, Yong Hong, Qi Yu, Hong Da Xu, Zhi Yong Liu, Ming Zhu Sun, and Jing Zhu. "Adsorption Behavior and Kinetics of Methyl Orange in Water on Activated Carbon." Advanced Materials Research 549 (July 2012): 318–21. http://dx.doi.org/10.4028/www.scientific.net/amr.549.318.

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The adsorption behavior of methyl orange aqueous solution was investigated on husk-based activated carbon. The effects of key factors, i.e., degassing pretreatment, adsorption time, temperature, adsorbent dosage and initial concentration, on the adsorption efficiency were measured. The kinetic adsorption curves and adsorption isotherms were fitted with theoretical model. The results show that the removal efficiency of methyl orange could be significantly improved by degassing pretreatment, prolonging the time, lowering temperature or reducing the initial concentration. In the context, adsorpti

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Bağcı, Safiye, and Ayhan Ceyhan. "Adsorption of methylene blue onto activated carbon prepared from Lupinus Albus." Chemical Industry and Chemical Engineering Quarterly 22, no. 2 (2016): 155–65. http://dx.doi.org/10.2298/ciceq150522030b.

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The adsorption of methylene blue (MB) from synthetic aqueous solutions in batch experiments using Lupinus Albus-activated carbon (LAAC) by chemical activation with zinc chloride was investigated. Prior to adsorption experiments, surface/physical properties of LAAC were determined using Scanning Electron Microscopy, Fourier transform infrared Spectroscopy and nitrogen adsorption isotherm. In the adsorption experiments, effects of adsorption time, solution pH, MB concentration and amount of LAAC were investigated. The isotherm and kinetic parameters were used to describe the experimental data. T

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Tan, Xiao Yan, Guo Lan Li, and Song Li. "Adsorption of Phenol onto Activated Carbons." Advanced Materials Research 531 (June 2012): 407–10. http://dx.doi.org/10.4028/www.scientific.net/amr.531.407.

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Coal-based Activated carbon was modified by thermal and nitric acid treatment to adsorb phenol from aqueous solution. Boehm titration, point of zero charge ( pHPZC ) and X-photoelectron spectroscopy (XPS) were used to characterize activated carbons. Acid treatment leads to the increase of the content of surface oxygen, whereas thermal treatment causes the decrease of the content of surface oxygen.The surface characteristics of activated carbons have significant effect on phenol adsorption. The adsorption isotherms of phenol adsorption are described by Langmuir isotherm. The kinetic studies ind

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Cao, Jianhua, Dongzhou Li, Weihua Liang, and Dayong Wu. "Study on Adsorption of Cu(II) on Chitosan Nanofiber Membranes." International Journal of Nanoscience 13, no. 05n06 (2014): 1460009. http://dx.doi.org/10.1142/s0219581x14600096.

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Chitosan nanofiber membranes by electrospinning technique were used to remove Cu ( II ) from aqueous solution. The adsorption kinetics, equilibrium isotherms, and pH effect were investigated in batch experiments. The Langmuir isotherm and pseudo second-order kinetic models agree well with the experimental data. The chitosan nanofiber membranes are effective for Cu ( II ) adsorption at pH6. Results showed that the maximum adsorption capacity of the chitosan nanofiber membranes with Cu ( II ) is 118.62 mg g-1. The chitosan nanofiber membranes can be used as an effective adsorbent for the removal

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Assoumani, A., L. Favier-Teodorescu, and D. Wolbert. "Adsorption kinetics and isotherm characteristics of selected endocrine disrupting compounds on activated carbon in natural waters." Water Supply 9, no. 1 (2009): 51–58. http://dx.doi.org/10.2166/ws.2009.063.

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Bisphenol A (BPA) and ethynylestradiol (EE2), two representative endocrine disrupting compounds (EDCs), were tested for their adsorbabilities onto two powdered activated carbons (PACs). The main aim of the study was to create a prediction tool for the determination of the EDCs adsorbabilities at low ng.L−1 level. Single solute solution adsorption isotherms at high concentrations, for prediction purposes, and low concentrations, for verification of the prediction, were performed for one EDC/PAC couple. Over the whole range of concentration, results showed that the Langmuir-Freundlich model bett

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Sari, Fahriya Puspita, Dede Heri Yuli Yanto, and Gustan Pari. "Activated Carbon Derived From OPEFB by One Step Steam Activation and Its Application for Dye Adsorption : Kinetics and Isothermal Studies." Reaktor 19, no. 2 (2019): 68–76. http://dx.doi.org/10.14710/reaktor.19.2.68-76.

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Activated carbon was prepared from OPEFB by one step steam activation method. The adsorption performance for the removal of acid orange 52 (AO 52), reactive blue 19 (RB 19), basic violet 1 (BV 1) was investigated. Each dye has a different chemical structure such as azoic, anthraquinone, triarylmethane for AO 52, RB 19, and BV 1 respectively. The effects of adsorbent dosage, pH, and contact time on the adsorption process were studied. Experimental data were analyzed by model equations such as Langmuir, Freundlich and Temkin isotherms and it was found that the Langmuir isotherm model best fitted

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Adeola, Adedapo O., and Patricia B. C. Forbes. "Optimization of the sorption of selected polycyclic aromatic hydrocarbons by regenerable graphene wool." Water Science and Technology 80, no. 10 (2019): 1931–43. http://dx.doi.org/10.2166/wst.2020.011.

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Abstract A novel graphene wool (GW) material was used as adsorbent for the removal of phenanthrene (PHEN) and pyrene (PYR) from aqueous solution. Adsorption kinetics, adsorption isotherms, thermodynamics of adsorption and effect of pH, ionic strength, and temperature on the adsorption of PHEN and PYR onto GW were comprehensively investigated. Isothermal and kinetic experimental data were fitted to Langmuir, Freundlich, Temkin, Sips and Dubinin–Radushkevich models, as well as pseudo-first-order and pseudo-second-order kinetic models. The adsorption kinetic data best fit the pseudo-second-order

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Al-Rufaie, M. M., Z. T. A. Alsultani, and A. S. Waheed. "Adsorption kinetics and thermodynamics of Azure C dye from aqueous solution onto activated charcoal." Koroze a ochrana materialu 60, no. 3 (2016): 80–85. http://dx.doi.org/10.1515/kom-2016-0013.

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Abstract Adsorption thermodynamics and kinetics of Azure C and from the aqueous solution on activated charcoal was examined. The charcoal was activated by concentrated sulphuric acid and the adsorption kinetic and thermodynamic was tested in batch experiment. An experiments used the adsorption batch method to observe the effect of the variable parameters, i.e. concentration of dye, time of contact, pH, temperature and adsorbent dose. The ideal dosage of adsorbent was 0.3 g for Azure C. The equilibrium state was reached within 60 min for dye Azure C at activated charcoal. The isotherms of equil

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Overah, L. C. "Nonlinear Kinetic and Equilibrium Adsorption Isotherm Study of Cadmium (II) Sorption by Dacryodes edulis Biomass." Nigerian Journal of Basic and Applied Sciences 28, no. 2 (2021): 10–19. http://dx.doi.org/10.4314/njbas.v28i2.2.

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The kinetics and equilibrium adsorption isotherm of cadmium (II) adsorption onto Dacryodes edulis (native peer seed) biomass was studied using a nonlinear approach, which is unpopular but proven in some literature to be more reliable and easier. In optimizing the process, about 98% removal of the cadmium ion was achieved within five minutes at pH 7 by contacting just 30 mg of the Dacryodes edulis seed biomass with the adsorbate solution of a concentration of 100 mg/L. Non-linear investigation of the kinetics and adsorption isotherms of the process was done using the R console statistical and c

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Moghadam, Razieh Shekari, Babak Samiey, and Jiang Ning Wu. "Graphene Oxide/Polyamidoamine G4 as a High Efficient and Eco-Friendly Adsorbent for Dichromate Ions." Acta Chimica Slovenica 71, no. 2 (2024): 363–79. http://dx.doi.org/10.17344/acsi.2023.8361.

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In this study, graphene oxide/polyamidoamine G4 was used as a biocompatible nanocomposite adsorbent to adsorb dichromate ions. In alkaline solutions, dichromate ions changed to chromate ions which were not adsorbed on the surface of adsorbent. Thus, experiments were carried out in acidic and neutral water solution. Under these conditions, adsorption sites of adsorbent were protonated by primary and ternary amine groups of adsorbent shown as –NH3+ and –NHR2+ respectively that adsorbed dichromate ions through electrostatic interactions. Adsorption isotherms of dichromate on graphene oxide/polyam

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Davoud, Balarak, Kord Mostafapour Ferdos, and Azarpira Hossein. "Water remediation using Rice shell-based activated carbon for removal of Sulfamethoxazole: Error analysis." Pharmaceutical and Chemical Journal 3, no. 3 (2016): 71–77. https://doi.org/10.5281/zenodo.13759571.

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The Rice shell was used as a low cost adsorbent to produce activated carbon (AC) for the removal of sulfamethoxazole (SMZ) from aqueous solution at batch systems. Equilibrium data were fitted to Langmuir, Freundlich, Redlich–Peterson and Sips isotherms. The equilibrium data were best represented by the Langmuir isotherm. maximum monolayer capacity of AC obtained from Langmuir is 78.25 mg/g. The adsorption kinetics was found to be best represented by Pseudo second order kinetic model. Equilibrium and Kinetic Studies further supported by the error analysis functions (ARE, EABS, X<sup>2</su

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Subha, R., and C. Namasivayam. "Kinetics and isotherm studies for the adsorption of phenol using low cost micro porous ZnCl2 activated coir pith carbonA paper submitted to the Journal of Environmental Engineering and Science." Canadian Journal of Civil Engineering 36, no. 1 (2009): 148–59. http://dx.doi.org/10.1139/s08-039.

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In the present study, the potential of ZnCl2 activated coir pith carbon for adsorption of phenol from aqueous solution was investigated. Batch kinetics and isotherm studies were carried out to evaluate the effects of contact time, initial concentration, adsorbent dose, pH, and temperature. Adsorption kinetics was tested for first order, second order, and Bangham’s model and rate constants of kinetic models were evaluated. Equilibrium isotherms for the adsorption of phenol were analysed by Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherm models. The Langmuir adsorption capacity,

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Nieszporek, Krzysztof, and Tomasz Banach. "Theoretical prediction of gas adsorption kinetics based on equilibrium data." Canadian Journal of Chemistry 90, no. 10 (2012): 828–35. http://dx.doi.org/10.1139/v2012-064.

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Based on the equilibrium adsorption isotherms, new expressions describing the rate of adsorption were developed. The theoretical model takes into account the influence of diffusional effects on the rate of adsorption. Other nonideal effects such as surface energetic heterogeneity or intermolecular interactions can be taken into account by using the adequate equilibrium isotherm. The accuracy of the presented rate equations was verified using real adsorption systems.

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Jiang, Shuang Ying, Bin Gao, and Bin Dong. "Ion Exchange Behaviors of Ca(II) and Mg(II) on Lewatit MonoPlus TP 207 and TP 208 Chelating Resins." Advanced Materials Research 347-353 (October 2011): 937–51. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.937.

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The protonation process, the adsorption equilibrium process, the adsorption isotherms and the adsorption kinetics of adsorbing Ca(II) and Mg(II) onto Lewatit MonoPlus TP 207 and TP 208 chelating resins were studied using the pH titration method and batch experimental method. By omitting the ionic charges, first protonation constants, second protonation constants and equilibrium constants were determined. The adsorption behaviors were found to be dependent on contact time, pH, temperature and initial concentrations. The experimental adsorption isotherms were fitted using both the Freundlich and

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Ma, Li Li, Qing Lin Xie, Nan Chun Chen, Hui Xu, Hai Miao Zhou, and Qing Feng Yu. "Research on Lead (II) Adsorption Mechanism from Aqueous Solution by Calcium Carbonate Modified Diatomite Absorbent." Materials Science Forum 921 (May 2018): 21–28. http://dx.doi.org/10.4028/www.scientific.net/msf.921.21.

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In this study, calcium carbonate was used to coat and link the surface of diatomite for the formation of a novel modified adsorbent (referred to as Ca–diatomite). Various analytical techniques were used to characterize structure and mechanisms of modification and adsorption process, like Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD). Results showed that that Calcium carbonate had been successful grafted onto the surface of diatomite after modification, and Calcium carbonate modification improved the adsorption performance of diatomi

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Liu, Kai, Lihui Chen, Liulian Huang, Shan Lin, Shilin Cao, and Hongping Wang. "Adsorption behaviors of acidic and basic dyes by thiourea-modified nanocomposite aerogels based on nanofibrillated cellulose." BioResources 13, no. 3 (2018): 5836–49. http://dx.doi.org/10.15376/biores.13.3.5836-5849.

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Inspired by the high adsorption efficiency of aerogels, a thiourea-modified nanocomposite aerogel consisting of nanofibrillated cellulose and chitosan was prepared via a facile method. The prepared novel aerogel was studied by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The adsorptions of the acidic and basic dyes (acid orange 7 and crystal violet) on the aerogel from aqueous solutions were investigated according to the adsorption kinetics and isotherms. The results indicated that a pseudo-second-order kinetic model more accurately described the adsor

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Andrade Siqueira, Thaisa Caroline, Isabella Zanette da Silva, Andressa Jenifer Rubio, et al. "Sugarcane Bagasse as an Efficient Biosorbent for Methylene Blue Removal: Kinetics, Isotherms and Thermodynamics." International Journal of Environmental Research and Public Health 17, no. 2 (2020): 526. http://dx.doi.org/10.3390/ijerph17020526.

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Adsorption in biomass has proven to be a cost-effective option for treatment of wastewater containing dyes and other pollutants, as it is a simple and low cost technique and does not require high initial investments. The present work aimed to study the adsorption of methylene blue dye (MB) using sugarcane bagasse (SCB). The biomass was characterized by scanning electron microscopy (SEM). Adsorption studies were conducted batchwise. Kinetics, adsorption isotherms, and thermodynamics were studied. The results showed that SCB presented a maximum adsorption capacity of 9.41 mg g−1 at 45 °C after 2

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Lv, Hong Bin, Yao Li, Wan You Zhang, and Li Juan Xi. "Preparation of Mg-Fe HTLCs and Study on the Adsorption Performance." Applied Mechanics and Materials 675-677 (October 2014): 647–53. http://dx.doi.org/10.4028/www.scientific.net/amm.675-677.647.

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Mg-Fe hydrotalcite-like compounds (Mg-Fe-HTLCs) were synthesized via hydrothermal method, and characterized by XRD and FT-IR. The roasted products were used to remove sulfate ions by the adsorptive ability from aqueous solution. The effects of adsorbent dosage, initial pH and temperature on the sulfate ions removal were fully investigated, and the adsorption kinetics and adsorption isotherms were also studied. Results showed that the synthesized materials with CO32- as the interlayer anions had fine crystallinity. The materials of Mg-Fe hydrotalcite-like compounds had a very good adsorption ca

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