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Journal articles on the topic 'Temkin isothermal model'

Author: Grafiati

Published: 7 June 2025

Last updated: 16 July 2025

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1

Javed, Ifrah, Muhammad Asif Hanif, Umer Rashid, Farwa Nadeem, Fahad A. Alharthi, and Elham Ahmed Kazerooni. "Enhancing Functionalities in Nanocomposites for Effective Dye Removal from Wastewater: Isothermal, Kinetic and Thermodynamic Aspects." Water 14, no. 17 (2022): 2600. http://dx.doi.org/10.3390/w14172600.

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The adsorption process combined with electrocoagulation is a highly effective technique for dye removal. Calcinized and non-calcinized composites based on bentonite and sodium zeolite were prepared for adsorptive removal of Foron EBL blue, Terasil brown 2RFL, Torque blue PG, and Orange P3R dyes. Factors affecting the adsorption process, such as contact time, initial dye concentration, and temperature, were also explored in this study. Equilibrium data of natural clay composites was explained by Freundlich, Langmuir, Dubinin Radushkevich isotherm, Harkin Jura, and Temkin isothermal models. Hark

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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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Choi, Jung-Weon, and Sang-June Choi. "Polyacrylamide Functionalized Graphene Oxide/Alginate Beads for Removing Ciprofloxacin Antibiotics." Toxics 10, no. 2 (2022): 77. http://dx.doi.org/10.3390/toxics10020077.

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Ciprofloxacin (CPX), a widely used antibiotic, was removed by synthesizing graphene oxide/calcium alginate–polyacrylamide (GO/Ca-Alg2–PAM) beads, a three-dimensional double-network complex. The synthesis of GO/Ca-Alg2–PAM beads was performed by crosslinking and cation exchange mechanisms with graphene oxide (GO), sodium alginate (Na-Alg), and polyacrylamide (PAM). The properties of GO/Ca-Alg2–PAM beads were confirmed using field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and a thermogravimetric analysis. Furthermore, isothermal adsorption experiments were p

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Prasetya, Dwi Sabda Budi, Ahmadi Ahmadi, Dwi Pangga, and Yusran Khery. "Studi Isotermal Proses Biosorption Emas Menggunakan Kitosan dari Cangkang Kepiting." Empiricism Journal 3, no. 1 (2022): 132–38. http://dx.doi.org/10.36312/ej.v3i1.909.

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Kesetimbangan isotermal serapan emas oleh kitosan telah dipelajari melalui eksperimen. Kitosan yang digunakan dalam penelitian ini merupakan biopolymer yang dihasilkan dari cangkang kepiting. Kitosan telah diaplikasikan dalam berbagai bidang seperti pertanian, biomedical, farmasi, kosmetik, lingkungan, industri makanan, industri kertas, dan tekstil. Pada penelitian ini kitosan diaplikasikan sebagai filter penyerap Au. Hal ini dilakukan karena kitosan memiliki kemampuan yang baik menyerap ion logam di dalam larutan. Ada beberapa parameter yang menentukan kapasitas serapan kitosan yaitu : deraja

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Dao, To Uyen T., Hong Tham T. Nguyen, Do Trung Sy, et al. "Adsorption Isotherms and Kinetic Models for Congo Red Adsorption on Ca-Al Layer Double Hydroxide Adsorbent." Solid State Phenomena 298 (October 2019): 128–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.298.128.

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The equilibrium and physicochemical properties of the Ca-Al LDH material were determined in this study. Kinetic data were analyzed using isothermal models including Langmuir, Freundlich, Temkin and Dubinin–Radushkevich. Adsorption behavior is well described by the Langmuir isotherm and the pseudo-second-order model. The maximum adsorption capacity of CR on Ca-Al LDH is found to be 72.569 mg/g. The uptake results indicated that the adsorption process was controlled by chemical processes and single-layer adsorption. Due to, the Ca-Al LDH material may be become an effective adsorbent for removal

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Wehinger, Gregor D., Bjarne Kreitz, and C. Franklin Goldsmith. "Non-Idealities in Lab-Scale Kinetic Testing: A Theoretical Study of a Modular Temkin Reactor." Catalysts 12, no. 3 (2022): 349. http://dx.doi.org/10.3390/catal12030349.

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The Temkin reactor can be applied for industrial relevant catalyst testing with unmodified catalyst particles. It was assumed in the literature that this reactor behaves as a cascade of continuously stirred tank reactors (CSTR). However, this assumption was based only on outlet gas composition or inert residence time distribution measurements. The present work theoretically investigates the catalytic CO2 methanation as a test case on different catalyst geometries, a sphere, and a ring, inside a single Temkin reaction chamber under isothermal conditions. Axial gas-phase species profiles from de

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Waheeb, Azal Shakir, Hassan Abbas Habeeb Alshamsi, Mohammed Kassim Al-Hussainawy, and Haider Radhi Saud. "Myristica fragrans Shells as Potential Low Cost Bio-Adsorbent for the Efficient Removal of Rose Bengal from Aqueous Solution: Characteristic and Kinetic Study." Indonesian Journal of Chemistry 20, no. 5 (2020): 1152. http://dx.doi.org/10.22146/ijc.50330.

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In the present study, the Myristica fragrans shells (MFS) was used as low-cost bio adsorbent for the removal of Rose Bengal (RB) dye from aqueous solutions. The characteristics of MFS powder were studied before and after adsorption using different techniques such as Fourier transform Infrared spectroscopy (FTIR), Thermal Gravimetric Analysis (TGA), BET and BJH surface area analysis, Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). Batch adsorption was adopted to evaluate the effect of various parameters on the removal of RB such as; time of contact (5–75 min), initial dye

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Tabti, Affaf, Imene Benchikh, Mohamed Serier, Franck Launay, and Fatiha Djafri. "Adsorption of bromothymol blue (BTB) dye using four zeolites as adsorbent." Kemija u industriji 70, no. 5-6 (2021): 243–50. http://dx.doi.org/10.15255/kui.2020.052.

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This study examined adsorption of anionic dye on four zeolitic materials incorporated (VS-1, CuZSM-5) and not incorporated into metals (S-1, ZSM-5). The adsorption of the bromothymol blue (BTB) dye on the four adsorbents was analysed using isotherm models Langmuir, Freundlich, and Temkin. Two kinetic models were also applied to study the adsorption process, pseudo-first order and pseudo-second order. The isothermal data showed good correlation. The kinetics of adsorption were better described by the pseudo-second order model. The results obtained indicate that the maximum percentage removal of

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Dan-Iya, Bilal Ibrahim, Faggo Abdullahi Ada, Muhammed Abdullahi Ubana, Ismaila Haruna, Aisha Grema, and Mohd Yunus Shukor. "Mercury Sorption onto Rice Husk Ash: An Isothermal Remodelling." Bioremediation Science and Technology Research 11, no. 1 (2023): 23–32. http://dx.doi.org/10.54987/bstr.v11i1.833.

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The rice milling process produces rice husk as a by-product. It is one of the most important agricultural leftovers in terms of volume. The data of the sorption isotherm of Hg (II) (CV) sorption onto rice husk ash, which was plotted using linearized plots of isothermal models were reanalyzed using isothermal models using nonlinear regression. As the datapoints were small, nineteen isotherm models with parameters of only up to three were utilized to prevent overfitting. The models were Henry, Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Jovanovic, Redlich-Peterson, Sips, Toth, Hill, Khan

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Dan-Iya, Bilal Ibrahim, Mohd Ezuan Khayat, and Mohd Yunus Shukor. "Biosorption of Zn (II) onto Rice Husk Ash: Isothermal Remodelling." Journal of Environmental Bioremediation and Toxicology 6, no. 1 (2023): 34–43. http://dx.doi.org/10.54987/jebat.v6i1.813.

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Zn is a heavy metal often found at elevated concentrations in effluents as high as 300 ppm from the rubber processing industry as it is used for the vulcanization of rubber. The rice milling process produces rice husk as a by-product. It is one of the most important agricultural leftovers in terms of volume. The data of the sorption isotherm of Zn (II) (CV) sorption onto rice husk ash, which was plotted using linearized plots of isothermal models were reanalyzed using isothermal models using nonlinear regression. As the datapoints were small, isotherms with parameters of only up to three were

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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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Hami, Hawraa Kassem, Ruba Fahmi Abbas, Shireen Abdulmohsin Azeez, and Nedaa Ibrahim Mahdi. "Azo Dye Adsorption onto Cobalt Oxide: Isotherm, Kinetics, and Error Analysis Studies." Indonesian Journal of Chemistry 21, no. 5 (2021): 1148. http://dx.doi.org/10.22146/ijc.62326.

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The current study focused on utilizing cobalt oxide to eliminate hazardous Eriochrome Black T (EBT) dye. The impact of pH (2, 4, 7, 8, and 10) and temperature (45, 50, and 55 °C) was examined for EBT removal. The results show that the maximum sorption occurred at pH = 2 and that the removal percentage increased with increasing temperature. Five non-linear regression methods were used to predict the best isotherm and kinetic models. A coefficient of non-determination, K2, was very helpful for selecting the RMSD function as a preferable error function among the five methods. Isothermal models to

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Ju, Won Jung, Jinsung An, and Eun Hea Jho. "Adsorption Characteristics of Cd and Pb on Microplastic Films Generated in Agricultural Environment." Journal of Korean Society of Environmental Engineers 43, no. 1 (2021): 32–42. http://dx.doi.org/10.4491/ksee.2021.43.1.32.

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Objectives:Plastics are widely used in daily life and in various industrial fields due to their convenience and thermal insulation, and the use of plastics is continuing to increase. In agricultural environments, plastics are largely used for vinyl houses and mulching vinyl. Used plastics are degraded into small fragments through physical, chemical, and biological processes. Among these, plastics with a particle size of 5 mm or less are defined as microplastics. Since microplastics have a relatively large surface area, various pollutants including heavy metals can potentially be adsorbed and a

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14

Ali, Nisar, Adnan Khan, Muhammad Bilal, Sumeet Malik, Syed Badshah, and Hafiz M. N. Iqbal. "Chitosan-Based Bio-Composite Modified with Thiocarbamate Moiety for Decontamination of Cations from the Aqueous Media." Molecules 25, no. 1 (2020): 226. http://dx.doi.org/10.3390/molecules25010226.

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Herein, we report the development of chitosan (CH)-based bio-composite modified with acrylonitrile (AN) in the presence of carbon disulfide. The current work aimed to increase the Lewis basic centers on the polymeric backbone using single-step three-components (chitosan, carbon disulfide, and acrylonitrile) reaction. For a said purpose, the thiocarbamate moiety was attached to the pendant functional amine (NH2) of chitosan. Both the pristine CH and modified CH-AN bio-composites were first characterized using numerous analytical and imaging techniques, including 13C-NMR (solid-form), Fourier-tr

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15

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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Shadhan, Zainab Jabbar Shadhan, Salem Alhamd, and Mohammed Nsaif Abbas. "Recovery of vanadium element from wastewater of petroleum refineries using effective adsorbent: Mathematical approach via isothermal, kinetics and thermodynamic simulation." Al-Qadisiyah Journal for Engineering Sciences 17, no. 3 (2024): 211–19. http://dx.doi.org/10.30772/qjes.2024.145441.1069.

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Adsorption behavior can be determined using different essential studies such as adsorption isotherm, kinetics, and thermodynamics. In this study, adsorption isotherm models, and kinetic, and thermodynamics studies are used to describe the use of alumina as an effective adsorbent and a remover of vanadium (V+5) ions from aqueous solutions contaminated by this metal. The aqueous solutions used simulate the wastewater of most traditional oil refineries. Efficiency can be determined by comparing the correlation coefficients of the linear relationships used with each model. Using alumina, the perfe

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GHOMRANI, Amira Fadia, Sihem ARRIS, and Tidjani Ahmed ZITOUNI. "Use of iron oxide nanomaterials as adsorbents for wastewater treatment." International Journal of Advanced Natural Sciences and Engineering Researches 7, no. 5 (2023): 45–50. http://dx.doi.org/10.59287/ijanser.900.

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The dissemination of chemical components into the environment might provoke harm to human health, animal species and the ecosystem. In order to reduce the negative effects of those pollutants, physico-chemical treatment procedures, namely the adsorption technique has been implemented. This study seeks to synthesize manufactured nanomaterials throughout a co-precipitation process such as nanoparticles (Ferrihydrite (Fh)) and nanocomposite magnetic iron (magnetite / activated carbon) capable of adsorbing certain inorganic species (heavy metals) such as hexavalent chromium Cr (VI). The prepared s

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Gzar, Hatem A., Saja F. Rewaeh, and Marwaa K. Azeez. "Equilibrium Isotherm and Kinetic Modeling for Lead (II) Adsorption on The Modified Rice Husk as Sustainable Applications to Produce Activated Carbon Alternatives." IOP Conference Series: Earth and Environmental Science 1232, no. 1 (2023): 012003. http://dx.doi.org/10.1088/1755-1315/1232/1/012003.

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Abstract The aim of the study is the assessment the performance of the suggested adsorbent. After testing a number of pH values to achieve this objective, it was found that the best lead ion removal efficiency occurred during batch studies at pH 5. According to studies on how agitation speed affects batch adsorption, 180 rpm is the appropriate shaking speed. The optimal contact time for the operation was 180 minutes. Furthermore, as the contact time rose, the adsorption effectiveness improved. The effectiveness of the rice husk’s absorptive ability and elimination of Lead (Pb) from aqueous sol

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Rewaeh, Saja Farhan, Hatem A. Gzar, and Marwaa K. Azeez. "As an Application of Sustainability: Utilizing Processed Rice Husk to Remove Cadmium Ions Cd (II) From Aqueous Phase by Adsorption." Wasit Journal of Engineering Sciences 11, no. 3 (2023): 1–13. http://dx.doi.org/10.31185/ejuow.vol11.iss3.446.

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This study goals to reduce the importance of expensive commercial activated carbon while removing heavy metals from wastewater using cheap, locally available materials (rice husk). To accomplish this goal, a variety of pH values were tested, and it was found that batch studies at pH 5 had the best Cadmium ion removal effectiveness. 180 minutes was determined to be the ideal contact time for the process, and it was discovered that as contact time increased, adsorption effectiveness increased. 180 rpm is the recommended shaking speed, given studies on how agitation speed influences batch adsorpt

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Adebanjo, Ahmed, Adesola Babarinde, and K. Moberuagba. "Biosorption of Cd (II), Pb (II) and Zn (II) from Aqueous Solutions using Garden Egg (Solanum Melongena) Leaf: Equilibrium, Kinetics and Thermodynamics." International Journal of Research and Review 9, no. 9 (2022): 1–12. http://dx.doi.org/10.52403/ijrr.20220901.

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The prevalent problems associated with heavy metal contamination of the environment particularly underground and surface wastewater compel the need to work on economical means of mitigating the accumulation of heavy metals in the environment by espousing the heavy metal biosorption option. The choice of biosorption in this regard is hinged on the overall cost control of the process and its relative effective outcome compared to other means of diminishing heavy metal accumulation in the environment. Thus, the potential of Garden Egg (Solanum melongena) Leaf (GEL) to remove Cd(II), Pb(II) and Zn

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Devi, Bhabani, and H. P. Sarma. "Equilibrium isotherm and kinetic study of biosorption of cadmium from synthetic water using wastes leaves of Averrhoa carambola." Journal of Applied and Natural Science 15, no. 2 (2023): 826–43. http://dx.doi.org/10.31018/jans.v15i2.4598.

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Globally, the discharge of heavy metals into the water bodies is a matter of serious concern. Heavy metals like cadmium are considered as toxic even at very low concentration. Several conventional methods are available to remove heavy metals from the wastewater. They bear high costs, generate high sludge, and consume high energy. Biosorbents provides many beneficial properties due to their good adsorption capacity for heavy metals. The present work focuses on the potential of waste leaves of Averrhoa carambola (WACLP) as an adsorbent for its ability to remove Cd (II) ions from synthetic water

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Al-Ma’abreh, Alaa M., Gada Edris, and Mike Kh Haddad. "Sonicating for the Uptake of Paracetamol from Solution by Activated Carbon from Oak: Kinetics, Thermodynamics, and Isotherms." Adsorption Science & Technology 2023 (March 3, 2023): 1–11. http://dx.doi.org/10.1155/2023/9922446.

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This inquiry used ultrasonic waves to uptake paracetamol (PA) by using oak-based activated carbon (ACO). The surface of ACO was explored based on FT-IR, SEM, and XRD before and after the adsorption. The kinetic data for PA adsorption onto ACO corresponds to a pseudo-second-order kinetic model. Isothermal models of the Langmuir, Freundlich, D-R, and Temkin were used. The adsorption of PA onto ACO was found to be a monolayer with 96.03% uptake, which corresponds to Langmuir. The thermodynamic experiments revealed the endothermic nature of PA adsorption onto ACO. Under the investigated optimal co

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Raji, Yosra, Ayoub Nadi, Marwane Rouway, et al. "Efficient Adsorption of Methyl Orange on Nanoporous Carbon from Agricultural Wastes: Characterization, Kinetics, Thermodynamics, Regeneration and Adsorption Mechanism." Journal of Composites Science 6, no. 12 (2022): 385. http://dx.doi.org/10.3390/jcs6120385.

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Nanoporous carbon derived from Moringa oleifera seed waste was synthesized by an original process of flash pyrolysis followed by zinc chloride impregnation. The N2-adsorption–desorption results of the optimized sample revealed a BET surface area of 699.6 m2/g and a pore size of 2 nm. It was evaluated for the adsorption of a mono azo dye, methyl orange (MeO), from aqueous solution. Four isothermal models (Langmuir, Freundlich, Dubinin–Radushkevic and Temkin) were applied to fit the experimental data. The results revealed that Langmuir is the most appropriate isothermal adsorption model to descr

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Babkin, A. V., E. A. Neskoromnaya, I. V. Burakova, A. E. Burakov, E. S. Mkrtchyan, and A. G. Tkachev. "Sorption-desorption properties of graphene oxide/polyhydroquinone nanocomposite in the extraction of rare earth elements Sm (III) ions from acetic-acetate buffer systems." Perspektivnye Materialy 1 (2022): 34–48. http://dx.doi.org/10.30791/1028-978x-2022-1-34-48.

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The paper describes the extraction of the rare earth element Sm3+ from aqueous buffer systems by a graphene-based nanostructured composite, modified using an organic polymer – polyhydroquinone. The authors determined the important parameters of the sorption-desorption of Sm3+ ions on a new nanocomposite “graphene oxide/polyhydroquinone” during a batch test, such as: initial concentration, the sorbent weight, pH of the solution, sorption rate constants, maximum sorption capacity of the nanocomposite, percentage sorption and desorption, entropy and enthalpy of the Sm3+ extraction process. The ki

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Veličković, Zlate, Bogdan Vujičić, Vladica Stojanović, et al. "Pulverized river shellfish shells as a 904 cheap adsorbent for removing of malathion from water: Examination of the isotherms, kinetics, thermodynamics and optimization of the experimental conditions by the response surface method." Vojnotehnicki glasnik 69, no. 4 (2021): 871–904. http://dx.doi.org/10.5937/vojtehg69-32844.

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Introduction/purpose: In this study, we investigated the possibility of removing the organophosphorus pesticide malathion from water using a new adsorbent based on the biowaste of river shell shards from the Anodonta Sinadonta woodiane family, a material that accumulates in large quantities as waste on the banks of large rivers. Two adsorbents were tested - mechanically comminuted river shells (MRM) and mechanosynthetic hydroxyapatite from comminuted river shells (RMHAp). Methods: The obtained adsorbents were characterized and tested for the removal of the organophosphorus pesticide malathion

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Tahir, Muhammad Asif, Haq Nawaz Bhatti, Irshad Hussain, Ijaz Ahmad Bhatti, and Muhammad Asghar. "Sol–Gel Synthesis of Mesoporous Silica–Iron Composite: Kinetics, Equilibrium and Thermodynamics Studies for the Adsorption of Turquoise-Blue X-GB Dye." Zeitschrift für Physikalische Chemie 234, no. 2 (2020): 233–53. http://dx.doi.org/10.1515/zpch-2019-1443.

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AbstractMesoporous silica (MPS) and MPS-Fe composite was prepared via sol–gel technique and characterized by BET, FTIR, XRD, SEM and pZc. The MPS and MPS-Fe adsorption efficiencies were evaluated for a cationic dye Turquoise-blue X-GB. The MPS-Fe composite showed pore size and BET values of 9.52 nm and 309 m2/g, respectively. XRD and SEM analysis revealed the amorphous nature and uniform distribution of spherical partciles with average particle size of 50 nm of MPS-Fe composite. The points of zero (pZc) charge found to be 2.3 and 6.3 for MPS and MPS-Fe, respectively. The MPS and MPS-Fe showed

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Batool, Fozia, Samia Kanwal, Hafsa Kanwal, et al. "Ecofriendly Synthesis of Magnetic Composites Loaded on Rice Husks for Acid Blue 25 Decontamination: Adsorption Kinetics, Thermodynamics, and Isotherms." Molecules 28, no. 20 (2023): 7124. http://dx.doi.org/10.3390/molecules28207124.

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Addressing the growing need for methods for ecofriendly dye removal from aqueous media, this study explores the potential of rice husks coated with iron oxide (Fe2O3@RH composites) for efficient Acid Blue 25 decontamination. The adsorption potential of Acid Blue 25 is analyzed using raw rice husks and Fe2O3 nanoparticles in the literature, but their enhanced removal capacity by means of Fe2O3@RH composites is reported for the first time in this study. Fe2O3@RH composites were analyzed by using analytical techniques such as TGA, SEM, FTIR, BET, and the point of zero charge (pH(PZC)). The Acid B

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Sha’arani, Shakirah Abdul Wahab, Nur Adeela Yasid, Mohd Izuan Effendi Halmi, Ahmad Razi Othman, and Mohd Yunus Shukor. "Adsorption of Sodium Dodecyl Sulfate onto Activated Coconut Shell-Based Adsorbent: Isothermal Remodelling." Journal of Environmental Microbiology and Toxicology 11, no. 1 (2023): 52–61. http://dx.doi.org/10.54987/jemat.v11i1.884.

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A remodelling evaluation was conducted on the sorption isotherm data for SDS adsorption onto activated coconut shell using nonlinear regression. A total of nineteen models, including BET, Brouers-Sotolongo, Dubinin-Radushkevich, Fowler-Guggenheim, Freundlich, Fritz-Schlunder III, Hill, Henry, Jovanovic, Khan, Langmuir, Moreau, Radke-Prausnitz, Redlich-Peterson, Sips, Temkin, Toth, Unilan, and Vieth-Sladek, were employed to determine the best fit through nonlinear regression. All models were found to exhibit good fits to the data, except for the Fowler-Guggenheim, Henry and Dubinin-Radushkevich

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Rewaeh, Saja F., Hatem A. Gzar, and Marwaa K. Azeez. "Sorption Kinects and Equilibrium for The Removal of Cadmium and Lead from Aqueous Phase on Rice Husk in Inverse Fluidization Technique." IOP Conference Series: Earth and Environmental Science 1232, no. 1 (2023): 012010. http://dx.doi.org/10.1088/1755-1315/1232/1/012010.

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Abstract The objectives of this study are to use the inverse fluidization technique to remove heavy metals from wastewater using inexpensive agricultural waste (Rice Husks) and to investigate the effects of operating factors on the dynamic behavior of the adsorption procedure in the inverse fluidized bed, such as the mass of modified rice husks, flow rate (Q), and particle size (dp ). During batch experiments, the best metal ion removal effectiveness was found to be at pH 5, which was discovered after investigating several pH values to achieve this goal. The ideal shaking speed for batch adsor

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Núñez-Gómez, Dámaris, Juan José Martínez-Nicolás, Pilar Legua, Carlos Giménez-Valero, Alejandro Andy Maciá-Vázquez, and Pablo Melgarejo. "Comparative Evaluation of Boron Sorption Dynamics on Zeolites in Irrigation Waters: An Isothermal Modeling Approach." Molecules 29, no. 11 (2024): 2545. http://dx.doi.org/10.3390/molecules29112545.

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Efficient boron removal from irrigation waters is crucial for sustainable agriculture, as elevated levels of boron can be toxic to many plants, limiting growth and crop productivity. In this context, the present study investigated the sorption equilibrium of boron using zeolites in two types of aqueous matrices: a synthetic solution containing only boron and natural irrigation waters. Through the application of various isothermal sorption models (Langmuir, Freundlich, Sips, Toth, Jovanovic, Temkin, Dubinin–Radushkevich, and Redlich–Peterson), the efficacy of zeolite for boron removal under con

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ALBERTON, Matheus Borghezan, та Cleber Antonio LINDINO. "ADSORPTION OF HORMONE 17α-METHYLTESTOSTERONE IN SOILS". Periódico Tchê Química 17, № 35 (2020): 948–59. http://dx.doi.org/10.52571/ptq.v17.n35.2020.78_alberton_pgs_948_959.pdf.

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With the increase in fish production in fish farming systems, mainly tilapia, the use of the hormone 17α-methyltestosterone (MT) as an inducer of the masculinization of fry has grown together. The probability of contamination of natural resources also tends to increase, and there is no Brazilian law that regulates the content of this hormone in waters. The study of the interaction of the hormone with the typical soil of the producing regions is essential to understand the factors that influence its adsorption. This work used two samples of Eutropherric Red Oxisols and the conditions of the int

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Khan, Qaiser, Muhammad Zahoor, Syed Muhammad Salman, et al. "The Chemically Modified Leaves of Pteris vittata as Efficient Adsorbent for Zinc (II) Removal from Aqueous Solution." Water 14, no. 24 (2022): 4039. http://dx.doi.org/10.3390/w14244039.

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High concentrations of zinc along with other metals are released by steel mills, and this has a number of negative effects on organism health; most notably, neurological symptoms have been recorded with a high risk of brain atrophy. In the current study, Zn (II) was eliminated from steel mill effluent, utilizing chemically processed Pteris vittata plant leaves as a biosorbent. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and energy dispersive X-ray spectroscopy (EDX) were applied to characterize the chemically modified

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Pei, Yuan Yuan, and Jing Yong Liu. "Adsorption of Pb²⁺ in Wastewater Using Adsorbent Derived from Grapefruit Peel." Advanced Materials Research 391-392 (December 2011): 968–72. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.968.

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The adsorbent was prepared from Grapefruit peel by activation with ZnCl2. Grapefruit peel adsorbent (GPA) was employed to be as adsorbent to remove Pb(Ⅱ) in wastewater. The affecting factors on the adsorption of Pb(Ⅱ)from aqueous solution with GPA, such as solution pH, contact time, GPA dosage, initial Pb(Ⅱ) concentration, and reaction temperature were investigated. Adsorption kinetics and adsorption mechanism were investigated also. The results showed that the factors mentioned above have remarkably influence on adsorption of Pb(Ⅱ) ions onto GPA. The suitable conditions for the adsorption con

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Abd, I. N., and M. J. Mohammed-Ridha. "TETRACYCLINE ANTIBIOTIC REMOVAL FROM AQUEOUS SOLUTION USING CLADOPHORA AND SPIRULINA ALGAE BIOMASS." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 52, no. 2 (2021): 336–47. http://dx.doi.org/10.36103/ijas.v52i2.1295.

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Cladophora and Spirulina algae biomass have been used for the removal of Tetracycline (TC) antibiotic from aqueous solution. Different operation conditions were varied in batch process, such as initial antibiotic concentration, different biomass dosage and type, contact time, agitation speed, and initial pH. The result showed that the maximum removal efficiencies by using 1.25 g/100 ml Cladophora and 0.5 g/100 ml Spirulina algae biomass were 95% and 94% respectively. At the optimum experimental condition of temperature 25°C, initial TC concentration 50 mg/l, contact time 2.5hr, agitation speed

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J. Yasseen, Zeyad, and Nizam M. El-Ashgar. "Equilibrium Isotherm Analyses and Kinetic Studies of Bioadsorption of Methylene Blue Dye onto Dried Olive Leaves." Israa University Journal for Applied Science 7, no. 1 (2023): 189–209. http://dx.doi.org/10.52865/bupw716.

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Background: Olive leaves were collected, dried, ground, and then used as a low-cost, environmentally friendly recycled adsorbent. The ability of dried olive leaves to extract Methylene Blue, as an industrial pollutant in contaminated water, was tested. Method: In this study, the dried olive leaves (DOL) were used as bioadsorbents to extract Methylene Blue (MB) dye from water. Batch experiments were conducted to address the effect of drying temperature of DOL within the range of (75 C - 200 C) on MB dye extraction. The amount of MB dye absorbed was determined using a UV-Vis spectrophotometer.

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Alcides, M. M. Michellod, N. Pila Andrea, I. Profeta Mariela, et al. "Models Sorption of Cyhalofop-Butyl, on Mesopotamic Agricultural Soils." Chemistry Research Journal 5, no. 4 (2020): 54–61. https://doi.org/10.5281/zenodo.12595863.

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<strong>Abstract </strong>The adsorption equilibrium of butyl (2R)-2-[4-(4-cyano-2-fluorophenoxy) phenoxy]propanoate (CB) was studied in rice-growing soil. The equilibrium sorption data were fitted into Langmuir, Temkin and Dubinin–Radushkevich (DRK) isotherms. Of the four adsorption isotherm, the R<sup>2</sup> value of Dubinin–Radushkevich isotherm model was the highest. The maximum monolayer coverage (q<sub>m</sub>) from Langmuir isotherm model was determined to be 0.079 mg g<sup>-1</sup>, the separation factor indicating a favorable sorption experiment is 0.38. The heat of sorpt

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Aktas, Doga, Nadir Dizge, H. Cengiz Yatmaz, Yasemin Caliskan, Yasin Ozay, and Ayten Caputcu. "The adsorption and Fenton behavior of iron rich Terra Rosa soil for removal of aqueous anthraquinone dye solutions: kinetic and thermodynamic studies." Water Science and Technology 76, no. 11 (2017): 3114–25. http://dx.doi.org/10.2166/wst.2017.468.

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Abstract Adsorption and advanced oxidation processes are being extensively used for treatment of wastewater containing dye chemicals. In this study, the adsorption and Fenton behavior of iron rich Terra Rosa soil was investigated for the treatment of aqueous anthraquinone dye (Reactive Blue 19 (RB19)) solutions. The impact of pH, initial dye concentration, soil loading rate, contact time and temperature was systematically investigated for adsorption process. A maximum removal efficiency of dye (86.6%) was obtained at pH 2, soil loading of 10 g/L, initial dye concentration of 25 mg/L, and conta

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Albalwi, Hanan A. "Synthesis and Characterization of Ca-ALG/MgO/Ag Nanocomposite Beads for Catalytic Degradation of Direct Red Dye." Catalysts 13, no. 1 (2022): 78. http://dx.doi.org/10.3390/catal13010078.

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Increased water pollution due to the tremendous increase of dye-containing effluent is still a serious problem which, in turn, adversely affects aquatic life and, consequently, the balance of our ecosystem. The aim of this research was to investigate whether Ca-ALG/MgO/Ag nanocomposite beads successfully prepared from calcium alginate hydrogels with MgO (Ca-ALG/MgO) doped with Ag nanoparticles (Ag NPs) caused effective degradation of Direct Red 83 dye. The formation of nanocomposite beads was confirmed by X-ray diffraction (XRD), Transmission Electron Microscope (TEM), Dynamic Light Scattering

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Saffarian, Delkhosh Arvin. "Deep Denitrogenation of Model Diesel Fuel Using Ni-doped Mesoporous Carbon: Synthesis Route and Adsorption Study." ChemistrySelect 6, no. 5 (2021): 1073–81. https://doi.org/10.1002/slct.202004522.

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Nickel-doped mesoporous carbon (MC) materials with 1, 4, and 7 wt. % nickel/MC, were synthesized and utilized for the elimination of indole, as representative of nitrogen-containing compounds, from a model diesel fuel. Different instrumental techniques, including Fourier-transform infrared (FT-IR) spectro-scopy, X-Ray diffraction (XRD), N2 adsorption-desorption analyses, field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDXS), and transmission electron microscopy (TEM) were used to characterize the synthesized Ni-doped mesoporous carbons. The XRD and N

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Khan, Qaiser, Muhammad Zahoor, Syed Muhammad Salman, Muhammad Wahab, Muhammad Talha, and Abdul Waheed Kamran. "Removal of Chromium (VI) from the Steel Mill Effluents Using the Chemically Modified Leaves of Pteris vittata as Adsorbent." Water 14, no. 17 (2022): 2599. http://dx.doi.org/10.3390/w14172599.

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Chromium (Cr), a metal that is released in appreciable amounts from the steel industry into water bodies, is not only the main causative agent of lung cancer in human but also negatively affects the metabolic activities of plants. Keeping in view the hazardous effects of Cr(VI), the present study was aimed to eliminate it from industrial effluents of steel mills installed in Dargai District Malakand, Pakistan, using chemically modified Pteris vittata plant leaves as an adsorbent. The instrumental techniques such as FTIR, surface area analysis, SEM, TGA and EDX were used to evaluate surface fun

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Xie, Shuang, Zhang Wen, Hongbin Zhan, and Menggui Jin. "An Experimental Study on the Adsorption and Desorption of Cu(II) in Silty Clay." Geofluids 2018 (August 14, 2018): 1–12. http://dx.doi.org/10.1155/2018/3610921.

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Heavy metals such as Cu(II) are widespread in the environment, and the impact of heavy metals on the environment of soils depends on the ability of soils to immobilize these pollutants. It is necessary to investigate the mechanism of interaction between heavy metal and soil from a soil remediation perspective. In this study, a series of experiments were conducted to investigate the adsorption and desorption behavior of Cu(II) in silty clay. Several impact factors such as pH, organic matter, temperature, and coexisted ions Zn(II) were considered. It was found that the adsorption process reached

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Hussain, Muhammad Sadiq, Rabia Rehman, and Muhammad Imran. "Comparative Evaluation of the Adsorption Performance of Citric Acid-Treated Peels of Trapa natans and Citrullus lanatus for Cationic Dyes Degradation from Water." Journal of Chemistry 2022 (May 20, 2022): 1–19. http://dx.doi.org/10.1155/2022/1109376.

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Various chemicals were explored in chemical combinations with two selected agrowastes in order to optimize, enhance, and improve their biosorption potential for the optimal and effective eradication of noxious, carcinogenic, and malignant cationic and basic dyes from wastewater. In this project, environmentally safe, economic, inexpensive, and widely available peels of Trapa natans (TP) and Citrullus lanatus (CP) were collected, dried, and pretreated with citric acid, revealing promising results. FT-IR and SEM characterizations of chemically changed biosorbents (C-TP and C-CP) have evidenced t

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Rastegar, Saeedeh, Mansoor Ghaffari, and Homa Hoseini. "Lignocellulose Nanofiber Media for the Enhanced Removal of Copper From Aqueous Solutions." Avicenna Journal of Environmental Health Engineering 8, no. 2 (2021): 61–73. http://dx.doi.org/10.34172/ajehe.2021.09.

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Nowadays, the entry of heavy metals entry into aqueous environments has jeopardized the health of human societies. The experiment was conducted in discontinuous conditions, and the study focused on examining the effect of five parameters including initial concentration, temperature, contact time, pH, and adsorbent dose on the adsorption of Cu heavy metals. In addition, the two-parameter models of Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich were studied and compared to evaluate isothermal absorption. The highest correlation coefficients were obtained for Freundlich (0.969) and Dubini

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Dada, A. O., J. O. Ojediran, and Abiodun Paul Olalekan. "Sorption of Pb2+ from Aqueous Solution unto Modified Rice Husk: Isotherms Studies." Advances in Physical Chemistry 2013 (March 18, 2013): 1–6. http://dx.doi.org/10.1155/2013/842425.

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Investigation of the sorption potential of rice husk, an agricultural waste, as an adsorbent was carried out. The rice husk was modified with orthophosphoric acid and was used for adsorption of lead (II) ions (Pb2+) from aqueous solution. Physicochemical properties of the modified rice husk were determined. Equilibrium sorption data were confirmed with Langmuir, Freundlich and Temkin adsorption isotherms. On the basis of adsorption isotherm graphs, R2 values were determined to be 0.995, 0.916, and 0.797 for Langmuir, Temkin, and Freundlich isotherms, respectively, indicating that the data fitt

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Owabor, C. N., I. O. Oboh, and F. A. Omiojieahior. "Adsorption Isotherms for Naphthalene on Clay and Silt Soil Fractions: A Comparison of Linear and Nonlinear Methods." Advanced Materials Research 367 (October 2011): 359–64. http://dx.doi.org/10.4028/www.scientific.net/amr.367.359.

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Polycyclic aromatic hydrocarbons occur naturally in petroleum oil and coal and the burning of fuel and the activities of paper mills also release these compounds to the environment. Batch experimental adsorption study for both soil fractions was conducted in a soil slurry system at ambient temperature, using <0.02mm particle sizes. Comparison was made of the linear least-squares method and a trial-and-error nonlinear method of some widely used isotherm models for the adsorption of naphthalene on clay and silt fractions. The experimental results were fitted to the Langmuir, Freundlich, Radke

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Fawzy, Mustafa A., Abeer S. Aloufi, Sedky H. A. Hassan, et al. "Sustainable Use of Marine Macroalga Sargassum muticum as a Biosorbent for Hazardous Crystal Violet Dye: Isotherm, Kinetic and Thermodynamic Modeling." Sustainability 15, no. 20 (2023): 15064. http://dx.doi.org/10.3390/su152015064.

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The pollution of aquatic bodies by synthetic dyes is regarded as one of the most significant environmental issues, which has prompted greater research into effective and sustainable removal techniques. Even though there have been major efforts in the previous few decades, more study is still necessary to fully examine the long-term performance and usable applicability of adsorbents and different adsorption techniques for the removal of dye. In the present study, a brown marine macroalga Sargassum muticum was used as an effective and sustainable biosorbent for the crystal violet (CV) dye remova

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El-Khatib, Ahmed M., N. S. Yousef, Z. F. Ghatass, Mohamed S. Badawi, M. M. Mohamed, and Mostafa Elkhatib. "Synthesized Silver Carbon Nanotubes and Zinc Oxide Nanoparticles and their Ability to Remove Methylene Blue Dye." Journal of Nano Research 56 (February 2019): 1–16. http://dx.doi.org/10.4028/www.scientific.net/jnanor.56.1.

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A promising rotating arc discharge method has been developed for producing high purity silver carbon nanotube and zinc oxide nanoparticles, to study their capacities for methylene blue (MB) dye removal under different conditions such as contact time, initial methylene blue dye ion concentration, solution pH, and adsorbent dose. The equilibrium isotherm data were analyzed using Langmuir, Freundlich, Temkin isotherms. Correlation coefficients indicated the following order to fit isotherms for silver carbon nanotube: Freundlich > Langmuir > Temkin. On the other hand, for zinc oxide nanopart

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Liu, Ming Da, Ge Tian, Liang Jie Zhao, Yao Sheng Wang, Lei Guo, and Yao Jing Wang. "Removal of Pb (II) from Aqueous Solution by Blast-Furnace Slags." Advanced Materials Research 726-731 (August 2013): 2736–41. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.2736.

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Five blast-furnace slags were used as adsorbents to remove Pb (II) from aqueous solution. Kinetic studies showed that the sorption process was best described by pseudo-second-order model. Among Langmuir, Freundlich and Temkin isotherms, the Freundlich isotherm had a better fit with the simulation of the adsorption of Pb (II).

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Gil, Tae Hyun, Wang Heon Lee, and Johng-Hwa Ahn. "Adsorption of Methylene Blue from Aqueous Solution by Pumpkin-Seed Residue." Journal of Korean Society of Environmental Engineers 42, no. 1 (2020): 10–18. http://dx.doi.org/10.4491/ksee.2020.42.1.10.

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Objective : Present research discussed the utilization of pumpkin-seed residue (PSR) after oil extraction with methanol as an adsorbent for methylene blue (MB) removal from aqueous solution.Method : The experiment was carried out to evaluate the influence of PSR adsorbent dose (7.5-25 g/L), initial MB concentration (25-200 mg/L), contact time (30-120 min), pH (3-11), and temperature (293-333 K). Adsorption isotherms were modeled with the Langmuir, Freundlich, and Temkin isotherms. The kinetic data were analyzed using pseudo-first-order and pseudo-second-order models.Results and Discussion : A

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Shojaat, Rahim, Afzal Karimi, Naghi Saadatjoo, and Soheil Aber. "Dye removal from artificial wastewater using heterogeneous bio-fenton system." Chemical Industry and Chemical Engineering Quarterly 23, no. 4 (2017): 447–56. http://dx.doi.org/10.2298/ciceq160621058s.

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In the present study, GOx/MnFe2O4/calcium alginate nano-composite was prepared by the trapping enzyme/nanoparticles in calcium alginate. The prepared absorbent was applied for decolorization of artificial dye wastewater of acid red 14 (AR14) by heterogeneous bio-Fenton system. Kinetic and isotherm studies were carried out. The decolorization of acid red 14 followed the Michaelis- Menten, pseudo-first order and pseudo-second order kinetic models. Good correlation coefficients were obtained by fitting the experimental data to Michaelis- Menten and pseudo-second order kinetic models. The adsorpti

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