Relevant bibliographies by topics / Langmuir model and Adsorption isotherm

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Langmuir model and Adsorption isotherm'

Author: Grafiati
Published: 5 June 2025
Last updated: 2 August 2025

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Journal articles on the topic "Langmuir model and Adsorption isotherm"

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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&ndash;Radushkevich (DRK) isotherms. Of the four adsorption isotherm, the R<sup>2</sup> value of Dubinin&ndash;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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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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Hsiao, H. C., S. M. Yih, and M. H. Li. "Adsorption Equilibrium of Xylene Isomers and p-Diethylbenzene in the Liquid Phase on a Y Zeolite." Adsorption Science & Technology 6, no. 2 (1989): 64–82. http://dx.doi.org/10.1177/026361748900600202.

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The saturated adsorptive capacity, adsorption equilibrium constant and adsorption isotherms of p-xylene, m-xylene, ethylbenzene (EB) and p-diethylbenzene (PDEB) on a K–BaY zeolite with n-heptane as the solvent have been studied at 25°C. The adsorption isotherms of the six binary pairs of these solutes with n-heptane as the solvent have also been determined at 25°C. The data cover a concentration range of xylene isomers from 0.05–0.3 mmol/ml. The molar adsorption capacity of the K–BaY zeolite for the different sorbates was found to be in the order: p-xylene &gt; EB &gt; m-xylene ≈ PDEB. PDEB is
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Liu, Xiangyao, Baohui Wang, Guolin Jing, and Ya'nan Sun. "Adsorption behaviors of methylene blue on sunflower stem pith." Water Science and Technology 79, no. 8 (2019): 1458–66. http://dx.doi.org/10.2166/wst.2019.142.

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Abstract Adsorption behaviors of methylene blue (MB) from aqueous solution using sunflower stem pith (SSP) as adsorbent were investigated. The effects of adsorption conditions such as adsorption time, initial concentration of MB and dosage of SSP on the detoxification of MB were examined. The equilibrium adsorption data were analyzed using three well-known isotherms: Langmuir, Freundlich and Temkin. The results indicated that the Langmuir isotherm fitted well to the data as compared with another isotherm model. The maximum adsorption capacity calculated by the Langmuir isotherm model was 277 m
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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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Syauqiah, I., D. Nurandini, N. P. Prihatini, and Jamiyaturrasidah. "Determination of rice husk activated Carbon capacity in adsorption of Cu Metal from Sasirangan liquid waste based on isotherm model." IOP Conference Series: Materials Science and Engineering 1212, no. 1 (2022): 012019. http://dx.doi.org/10.1088/1757-899x/1212/1/012019.

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Abstract The process of manufacturing Sasirangan - a traditional fabric of South Kalimantan - has an impact that affects environmental pollution, namely the dyeing process of the fabric. The synthetic dyes used contain heavy metals and one of those toxic metals is copper (Cu). This study aims to determine the adsorption capacity of rice husk activated carbon adsorbent by adjusting the adsorption pattern based on isotherm models as the treatment to sasirangan liquid waste. The method consists of three stages: preparation of adsorbent by carbonization process, chemical and physical activation, t
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He, Shao Hua, Dan Wang, Qing Qiu Kong, and Xi Wu. "Thermodynamic Studies for Adsorption of Cd2+ and Pb2+ from Waster Water on Modified Walnut Shell." Applied Mechanics and Materials 737 (March 2015): 622–26. http://dx.doi.org/10.4028/www.scientific.net/amm.737.622.

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The adsorption isothermal curve and thermodynamic adsorption of Cd2+ and Pb2+ on modified walnut shell from waster water were investigated using batch technique. The equilibrium adsorption data are fitted to Langmuir and Freundlich isotherm models and the model parameters are evaluated. The Langmuir isotherm model shows a better fit to adsorption data than the Freundlich isotherm model for the sorption of Cd2+ and Pb2+ on modified walnut shell. The maximum adsorption capacity of Cd2+ and Pb2+ by modified walnut shell is found to be 32.68 mg·g-1 and 84.75 mg·g-1 at 298K temperature, respectivel
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Ali Fil, Baybars. "Investigation of adsorption of Basic Orange 2 dye on montmorillonite and error analysis." Bulletin of the Chemical Society of Ethiopia 37, no. 1 (2022): 47–58. http://dx.doi.org/10.4314/bcse.v37i1.5.

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ABSTRACT. In this study, isotherm studies were investigated for the removal of basic orange 2 (BO2) dye on the montmorillonite surface. Two-parameter isotherm models such as Langmir, Freundlich, and Temkin isotherms and Three-parameter isotherm models such as Sips, Toth, and Khan isotherms were calculated by non-linear analysis method. The adsorption capacity at equilibrium was calculated by adding 0.035 g of adsorbent at 10-300 mg/L concentrations to 100 mL of synthetic dyestuff solution at room temperature. According to the results obtained, it was determined that the isotherm data matched t
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Oyedoh, Eghe A., and Michael C. Ekwonu. "EXPERIMENTAL INVESTIGATION ON CHROMIUM(VI) REMOVAL FROM AQUEOUS SOLUTION USING ACTIVATED CARBON RESORCINOL FORMALDEHYDE XEROGELS." Acta Polytechnica 56, no. 5 (2016): 373–78. http://dx.doi.org/10.14311/ap.2016.56.0373.

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The adsorption of chromium(VI) metal ion in aqueous solutions by activated carbon resorcinol formaldehyde xerogels (ACRF) was investigated. The results showed that pore structure, surface area and the adsorbent surface chemistry are important factors in the control of the adsorption of chromium(VI) metal ions. The isotherm parameters were obtained from plots of the isotherms and from the application of Langmuir and Freundlich Isotherms. Based on regression analysis, the Langmuir isotherm model was the best fit. The maximum adsorption capacity of ACRF for chromium (VI) was 241.9 mg/g. The pseud
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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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Dissertations / Theses on the topic "Langmuir model and Adsorption isotherm"

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Okon, Edidiong. "Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol." Thesis, Robert Gordon University, 2018. http://hdl.handle.net/10059/3123.

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Ethyl lactate (EL) plays a major role as green solvent and also a replacement for most petrochemical solvents. The esterification process of lactic acid and ethanol to produce EL is an equilibrium-limiting reaction and the selective removal of one of the reaction products can be improved using a membrane reactor and when coupled with a heterogeneous catalyst offers an opportunity for process intensification. This thesis investigates the batch process esterification reaction involving lactic acid (LA) and ethanol (EL) in the presence of a water selective membrane using different cation-exchange
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Orndorff, Zenah Wilson. "Phosphorus adsorption on sandy mine tailings : a comparison of treatments with fertilizers, wood ash, and compost /." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-08142009-040609/.

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Duygulu, Yusuf Bahadir. "Decolorization Of Synthetic Dye Solutions By Using Basaltic Tephra And Clinoptilolite." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605241/index.pdf.

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Discharge of colored effluents without decoloration originated from textile industries may cause serious problems in the receiving environments. In this study, natural materials that are basaltic tephra and clinoptilolite were used to remove various dyestuffs used in the textile industry. Those materials are cheap and available in large quantities in Turkey. The investigation of adsorption of basic, acidic and reactive dyes on these materials is the objective of this study. During preliminary experiments it was seen that adsorption equilibrium was reached in about 2 days. In adsorption ex
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Brady, James Peter. "An examination of the applicability of hydrotalcite for removing oxalate anions from Bayer process solutions." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/46165/1/James_Brady_Thesis.pdf.

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Hydrotalcite and thermally activated hydrotalcites were examined for their potential as methods for the removal of oxalate anions from Bayer Process liquors. Hydrotalcite was prepared and characterised by a number of methods, including X-ray diffraction, thermogravimetric analysis, nitrogen adsorption analysis and vibrational spectroscopy. Thermally activated hydrotalcites were prepared by a low temperature method and characterised using X-ray diffraction, nitrogen adsorption analysis and vibrational spectroscopy. Oxalate intercalated hydrotalcite was prepared by two methods and analysed with
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Ho, Loi. "Determination of Ibuprofen Isotherm Using Supercritical Fluid Chromatography." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4075.

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Chromatography is widely used to determine physiochemical properties data including adsorption isotherm. In the separation of enantiomers through sorptive processes, supercritical fluids allow efficient and green alternatives to liquid solvent based systems. The isotherm information is vital in the development of operating policies and design of preparative chromatographic or moving bed separation schemes. Determination of sorption isotherms from experimental chromatographic elution data is automated and compared with different chromatogram model. Procedures were developed and validated for se
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Telesford, Dana-Marie Leslie-Ann. "Langmuir Trough and Brewster Angle Microscopy Study of Model Lung Surfactant Monolayers at the Air/Aqueous Interface." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1353516892.

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Sbizzaro, Mariana. "Adsorção de atrazina em biocarvões obtidos a partir de colmo de bambu." Universidade Estadual do Oeste do Parana, 2016. http://tede.unioeste.br:8080/tede/handle/tede/272.

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Made available in DSpace on 2017-05-12T14:47:40Z (GMT). No. of bitstreams: 1 Mariana_ sbizzaro.pdf: 1501907 bytes, checksum: 5610159e30f98d52848320f90146f751 (MD5) Previous issue date: 2016-02-12<br>The agricultural sector has great influence in Brazilian economy. Furthermore, agricultural yield has been associated with pesticides application during crop cycle, which atrazine is applied for example, since it can cause environmental contamination when it does not reach its target. Thus, there are some essential and imperative options that can minimize contamination and negative impacts during
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Liu, Jia. "Development of a Design-Based Computational Model of Bioretention Systems." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/52703.

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Multiple problems caused by urban runoff have emerged as a consequence to the continuing development of urban areas in recent decades. The increase of impervious land areas can significantly alter watershed hydrology and water quality. Typical impacts to downstream hydrologic regimes include higher peak flows and runoff volumes, shorter concentration times, and reduced infiltration. Urban runoff increases the transport of pollutants and nutrients and thus degrades water bodies adjacent to urban areas. One of the most frequently used practices to restore the hydrology and water quality of urban
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Křikala, Jakub. "Adsorpce toxických kovů z odpadních vod na odpadním materiálu z potravinářského průmyslu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376851.

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This thesis was focused on the possibility of secondary utilization of waste material from the wine industry to remove heavy metals from wastewater. In the theoretical part, there were discussed mainly the problems of heavy metals pollution including methods of their removal and ICP-OES detection. Furthermore, the waste material from the wine production and the possibilities of its further processing were discussed there. The primary objective of the experimental part was to characterize the material by IR analysis, optimization of adsorption conditions, isotherms construction and determinatio
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Gabos, Mariana Bassetto. "Background concentrations and adsorption of selenium in tropical soils." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-20092012-164703/.

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Selenium (Se) is a trace element essential to the nutrition of animals. On the other hand, in a narrow concentration range, Se can cause toxicity. The presence of Se in food is related to the concentration of the element in soil. Thus, the knowledge of the Se amount and its behavior in soil are very important to the better manage the environment and to prevent toxicological problems and human deficiency. The objectives of this study were: (i) to quantify the natural content of Se in some Brazilian soils and correlates them with soil attributes; (ii) to evaluate the adsorption of selenite and s
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Books on the topic "Langmuir model and Adsorption isotherm"

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Frenzen, Christopher L. A comment on the derivation of the Langmuir isotherm for the adsorption kinetics. Naval Postgraduate School, 1991.

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Book chapters on the topic "Langmuir model and Adsorption isotherm"

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Li, Chenglong, Chengsi Xie, Yi Zong, et al. "Deep Neural Network for Prediction of Adsorbent Selectivity on Hydrogen Purification." In Proceedings of the 10th Hydrogen Technology Convention, Volume 1. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-8631-6_24.

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AbstractWith emergence of new materials, more and more materials are available for adsorption and separation processes. The adsorption selectivity of adsorbent to adsorbate is one of the important indicators in choosing materials. Because the adsorption experiment of the mixture is time-consuming and difficult, the selectivity of the adsorbent is generally calculated by the ideal adsorbed solution theory (IAST). Taking the CO2/H2 gas mixture as an example, this paper proposes a new adsorption selectivity calculation method based on a deep neural network (DNN) with 5 hidden layers, which takes
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Baleanu, Dumitru, Yeliz Yolcu Okur, Salih Okur, and Kasim Ocakoglu. "Parameter Identification of the Langmuir Model for Adsorption and Desorption Kinetic Data." In Nonlinear and Complex Dynamics. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0231-2_7.

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Liu, Jiaye, Jiarui Zeng, and Mei Wang. "Water Pollution in the River-Groundwater System Based on the Adsorption Model of Linear and Langmuir." In Environmental Governance, Ecological Remediation and Sustainable Development. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-52901-6_40.

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Selmi, Taher, Mongi Seffen, François Brouers, Vanessa Fierro, and Habib Sammouda. "Adsorption of Model Dyes Onto Porous Materials: Effect of pH and Temperature on the Parameters of Brouers-Sotolongo Kinetic Fractal and Generalized Isotherm." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_299.

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Attard, Gary, and Colin Barnes. "Gas adsorption at solid surfaces." In Surfaces. Oxford University Press, 1998. http://dx.doi.org/10.1093/hesc/9780198556862.003.0001.

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This chapter discusses gas adsorption by solid surfaces. It describes some key ideas relating to the interaction of gases with solids, starting with the Langmuir adsorption isotherm. The Langmuir isotherm has been used successfully to interpret equilibrium adsorption behaviour of a number of systems and in determining the total surface area of solid surfaces, particularly high surface area solids often used as heterogeneous catalysts. Meanwhile, the Brunauer, Emmett and Teller (BET) isotherm provides an extension of the Langmuir monolayer model to multilayer adsorption. The chapter then looks
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El Farissi, Hammadi. "Valorization of Biochar for Efficient Removal of Anionic Dyes From Wastewater." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2025. https://doi.org/10.4018/979-8-3693-9826-5.ch002.

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This chapter presents an investigation into the valorization of biochar derived from the pyrolysis of Cistus seeds (BS) and shells (BSh) for the removal of AO-52 dye from aqueous solutions. The study explores the influence of factors such as pH, adsorbent dosage, initial dye concentration, and contact time on the adsorption efficiency of BS and BSh biochars. The authors applied various kinetic and isotherm models, including pseudo-first-order, pseudo-second-order, Freundlich, and Langmuir, to analyze the adsorption mechanisms. The results indicate that the adsorption process follows pseudo-sec
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Hadoudi, Nouhaila, M’hamed Ahari, Najlae Zaki, et al. "Removal Efficiency of Phenolic Compounds (Bisphenol A and Pentachlorophenol) by Adsorption Using a Bentonite-CTAB." In Recent Advances in Montmorillonite [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004783.

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Bentonite clay modified with cetyltrimethylammonium bromide (CTAB) has been investigated as an effective adsorbent for the removal of bisphenol A (BPA) and pentachlorophenol (PCP) from aqueous solutions. The adsorption performance of Bentonite-CTAB was evaluated by conducting batch adsorption experiments under different conditions. The adsorption isotherms of BPA and PCP on Bentonite-CTAB (BT-CTAB) were analyzed using the Langmuir and Freundlich models. The Langmuir model provided a better fit to the experimental data, suggesting the presence of monolayer adsorption. The adsorption kinetics of
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Faska, Nadia, Soukayna Maitouf, and Brahim Orayech. "Molecular Interaction of Lactams With Mild Steel in Hydrochloric Acid Environment." In Advances in Chemical and Materials Engineering. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-7505-1.ch007.

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The inhibition effect of some lactams (Pyrrolidin‐2‐one, δ‐valerolactam, and ε‐caprolactam) on the corrosion behaviour of mild steel in 1M Hydrochloric acid solution was studied by weight loss and electrochemical techniques. The results demonstrated that both δ‐valerolactam, and ε‐caprolactam significantly inhibit corrosion. Specifically, δ‐valerolactam achieved an inhibition efficiency of 85.2%, while ε‐caprolactam exhibited a higher inhibition efficiency of 91.5%. The thermodynamic parameters governing the adsorption process such as adsorption heat, adsorption entropy, and adsorption free en
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Lafi, Ridha, Hajer Chemingui, Imed Montasser, and Amor Hafiane. "The Coffee Residues and the Esparto Fibers as a Lignocellulosic Material for Removal of Dyes from Wastewater by Adsorption." In Cellulose - Fundamentals and Conversion Into Biofuel and Useful Chemicals [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.111420.

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Biosorption onto lignocellulosic products such as coffee residues and esparto fibers in natural and modified forms have been identified as a potential alternative to the existing biosorbents applied for dye removal from wastewater. The efficiency of each material has been discussed with respect to the operating conditions and the chemical modifications. The investigated thermodynamics and kinetics studies were exposed also in terms of equilibrium isotherms and fitted kinetic models. Moreover, the crucial role of the chemical structures of the cellulosic fibers as an affecting factor on the mec
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Belekar, R. M., and S. J. Dhoble. "The Fluoride Adsorption Isothermal Studies of Activated Alumina Modified with Different Materials: A Critical Review." In Water Pollution Sources and Purification: Challenges and Scope. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/9789815050684122010005.

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: Fluoride in drinking water has become a global problem that has a profound effect on teeth and bones, fostering various health problems. Adsorption is a potential defluoridation technique because of flexibility, cost-effectiveness, environmental friendliness, simplicity in design, relative ease of operation, and capability of producing high water quality. Although activated alumina is an appropriate adsorbent, it has a narrow favorable pH range, a tendency to form toxic aluminum fluoride complexes, and the problem of aluminum metal leaching. This article critically reviews the applicability
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Conference papers on the topic "Langmuir model and Adsorption isotherm"

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Lukovits, István, Katalin Pálfi, Imre Bakó, and Erika Kálmán. "The Way to Less Toxic Inhibitors - A Model of the Inhibition Mechanism of Thiourea Compounds." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96148.

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Abstract Interaction of corrosion inhibitors with metal surfaces in acidic solutions was modelled using a non-linear model encompassing the Langmuir adsorption isotherm. The model yielded QSAR equations with multiple correlation coefficients equal to 0.97.
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Hassani, Sh, K. P. Roberts, S. A. Shirazi, E. F. Rybicki, J. R. Shadley, and C. Joia. "Characterization and Prediction of Chemical Inhibition Performance for Erosion-Corrosion Conditions in Sweet Oil and Gas Production." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01122.

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Abstract Erosion-corrosion deterioration of carbon steel in CO2-saturated systems with sand is a problem in the oil and gas industry because the combined effects of erosion and corrosion can reduce the protection provided by iron-carbonate scale formation and/or inhibitors. The result can be pitting and severe erosion-corrosion. The effects of sand erosion on inhibitor performance have been examined in a flow loop using an impinging jet test cell and different techniques such as long-term Weight Loss (WL), Linear Polarization Resistance (LPR), Potentiodynamic Polarization (PDYN), 3D profilomet
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Bahadori, Kasra Shayar, Bruce Brown, and Marc Singer. "Investigation of CO2 Corrosion Inhibitor Adsorption and Desorption Behavior Using Langmuir Isotherm Model and Effects of Iron Carbide on CI Persistency." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-19451.

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Abstract One of the most conventional methods to mitigate CO2 corrosion of pipelines in the oil and gas industry is to use chemical corrosion inhibitors. Probably the most commonly used inhibition method in the upstream oil and gas industry involves the continuous injection of an appropriate chemical formulation package to maintain a constant concentration of inhibitor in the fluid flowing through the pipeline. Selection of the inhibitor package is typically done through a tedious laboratory testing campaign, which involves the determination of the inhibitor efficiency and persistency in simul
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Ren, Shuai, Yi He, Zineb Belarbi, et al. "Methodology for Corrosion Inhibitor Characterization Applied to Phosphate Ester and Tetrahydropyrimidinium Model Compounds." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16443.

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Abstract Organic corrosion inhibitors (CIs) are widely employed in the oil and gas industry to protect carbon steel pipelines against internal corrosion. Inhibitor selection by corrosion engineers frequently relies on long testing procedures and protocols, which requires significant time and expenditure. This study aims at providing a simpler and more reliable methodology for inhibitor characterization, which can contribute to inhibitor selection in the oil and gas industry. Two model compounds, tetradecyl phosphate ester (TPE) and tetradecyl tetrahydropyrimidinium (TTHP), were chosen for this
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Haque, Jiyaul, Vandana Srivastava, and Ma Quraishi. "Phenylalanine Derived Zwitterion as Novel Corrosion Inhibitor for Mild Steel in 1M HCl: Electrochemical, Surface and DFT Studies." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-12800.

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Abstract The Phenylalanine based corrosion inhibitor 2-(3-(1-carboxy-2-phenylethyl)-1H-imidazol-3-ium-1-yl)-5-methyl-3-phenylpropanoate (IP) was synthesized by the condensation of phenylalanine, 2-oxopropanal, and formaldehyde and characterized by the FTIR and NMR spectroscopy. The corrosion inhibition performance of synthesized inhibitor was studied by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), Surface and DFT methods. The results show the studied IP is an effective inhibitor which showed the maximum inhibition efficiency of 96.08% at concentration 200pp
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Okeniyi, Joshua Olusegun, Abimbola Patricia Idowu Popoola, and Cleophas Akintoye Loto. "Corrosion Test-data Modeling for C10H18N2Na2O10 Performance on Steel-rebar in NaCl-immersed Concrete." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05590.

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Abstract This paper studies the empirical and correlation modeling of corrosion test-data for detailing C10H18N2Na2O10 (ethylenediaminetetraacetic disodium salt) performance on steel-rebar corrosion in 3.5% NaCl-immersed concrete. The corrosion test-data were measured using three non-destructive electrochemical-monitoring-techniques from duplicated samples of the NaCl-immersed steel-reinforced concrete slabs admixed with different C10H18N2Na2O10 concentrations. Empirical data from these were subjected to statistical-distribution fitting analyses as per ASTM(1) G16-95 R04. Results revealed that
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Kwarteng, Felix A., Mohsen A. Hassan, Hidenori Ohashi, and Ahmed S. G. Khalil. "Textile Wastewater Treatment Using Activated Graphene-Like Biochar Derived from Onion Peel Biomass." In 2024 8th International Conference on Materials Engineering and Nano Sciences & 2024 8th International Conference on Material Engineering and Manufacturing. Trans Tech Publications Ltd, 2024. http://dx.doi.org/10.4028/p-lxmzt1.

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Allium cepa L., popularly known as onion, has many benefits aside from being used as a vegetable. This study explored onion peel biomass by converting it to biochar (BC) followed by activation with KOH under optimal temperature and mix ratio. Various characterizations such as Raman, SEM, XRD and BET were performed to examine the surface and morphological properties of the activated biochar. The developed BC was utilized to treat textile wastewater composing methyl orange (MO) dye. The KOH-activated onion peel biochar showed a surface area of 1725.6 m2/g, resulting in a maximum dye adsorption c
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Lee, Kun-Lin John, and Srdjan Nesic. "The Effect of Trace Amount of H2S on CO2 Corrosion Investigated by Using the EIS Technique." In CORROSION 2005. NACE International, 2005. https://doi.org/10.5006/c2005-05630.

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Abstract A project has been initiated with the aim of extending the model to cover the effect of H2S on CO2 corrosion. This report covers one of the main building blocks necessary to complete the mechanistic CO2/H2S corrosion model, namely, electrochemistry of API 5L X65 carbon steel CO2 corrosion in the presence of small amounts of H2S (≤340ppm). The corrosion process monitored by Linear Polarization Resistance (LPR) and Electrochemical Impedance Spectroscopy (EIS) showed a significant decrease in corrosion rate in the presence of H2S due to the metal surface coverage by a sulfide film. This
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Pan, Mengqiu, Kasra Shayar Bahadori, Maryam Eslami, Bruce Brown, and Marc Singer. "Development of Methodologies for Continuous and Batch Inhibitor Film Persistency Investigation in the Laboratory." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-18056.

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Abstract Organic corrosion inhibitors (CIs) are widely used in the oil and gas industry to mitigate corrosion in pipeline transmission systems. Upstream, there are two distinct internal pipeline corrosion mitigation methods using inhibitors: continuous injection and batch inhibition. Each treatment mode has its own challenges, requiring specific knowledge of inhibitor film persistency (i.e., interrupted continuous injection or irregularity in batch inhibitor application frequency). The performance of applied corrosion inhibitors is typically evaluated in laboratory conditions, prior to field a
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Singh, Ambrish. "Pyran Derivatives as Acidizing Corrosion Inhibitors for N80 Steel in Hydrochloric Acid: Theoretical and Experimental Approaches." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-12835.

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Absrract The corrosion inhibition performance of pyran derivatives (AP) on N80 steel in 15% HCl was investigated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, weight loss, contact angle and scanning electron microscopy (SEM) measurements, DFT and molecular dynamic simulation. The adsorption of APs on the surface of N80 steel obeyed Langmuir isotherm. Potentiodynamic polarization study confirmed that inhibitors are mixed type with cathodic predominance. Molecular dynamic simulation was applied to search for most stable configuration and adsorption energies for t
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Reports on the topic "Langmuir model and Adsorption isotherm"

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Phisalaphong, Muenduen. Development and characterization of activated carbon derived from bacterial cellulose. Chulalongkorn University, 2017. https://doi.org/10.58837/chula.res.2017.66.

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Bacterial cellulose (BC) was investigated as a novel material for preparing activated carbons. BC was dried by heating and it was carbonized with a chemical activation process using phosphoric acid (H₃PO₄) as an activating agent at different temperatures (400, 500 and 600 °C). The properties of the activated carbons were characterized such as chemical property, structure, pore size, thermal property by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), N₂ -physisorption (BET), scanning electron microscopy (SEM) , thermal gravimetric (TGA). The obtained BC activated carbo
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Phisalaphong, Muenduen. Development and characterization of activated carbon derived from bacterial cellulose (Year 2). Faculty of Engineering, Chulalongkorn University, 2018. https://doi.org/10.58837/chula.res.2018.82.

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Bacterial cellulose (BC) was investigated as a novel material for preparing activated carbons. BC was dried by heating and it was carbonized with a chemical activation process using phosphoric acid (H₃PO₄) as an activating agent at different temperatures (400, 500 and 600 °C). The properties of the activated carbons were characterized such as chemical property, structure, pore size, thermal property by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), N₂ -physisorption (BET), scanning electron microscopy (SEM) , thermal gravimetric (TGA). The obtained BC activated carbo
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