carbon adsorption Articles

  • Arsenic(III) removal by adsorption on sawdust carbon

    Studies on the removal of As(III) by adsorption on sawdust and sawdust carbon have been carried out at room temperature (25 ± 1°C). The adsorption isotherm of As(III) on sawdust carbon was obtained in a batch reactor. The process of uptake follows the first-order adsorption rate expression and obeys the Langmuir and Freundlich model of adsorption. The mass transfer coefficients as a function of ...


    By Inderscience Publishers

  • Use of Carbon Adsorption Processes in Groundwater Treatment

    Untitled Document Summary: One of the leading treatment technologies for reduction of organic contaminants in groundwater has become the adsorption process utilizing granular ...

  • Oxidized fulvic acid adsorption on activated carbon

    This study evaluates and compares the parameters of equilibrium adsorption from aqueous solutions of river fulvic acids (FA) and peat fulvic acids. Compared to peat FA, the river FA had lower biodegradable dissolved organic carbon (BDOC). We observed a tendency for correlation between change of Gibbs free energy of adsorption and BDOC value. A chlorination dose of 1.4 mg L−1 did not ...


    By IWA Publishing

  • Studies on the adsorption of amoxicillin on multi-wall carbon nanotubes

    This study examined the feasibility of removing amoxicillin (AMO) from aqueous solutions using multi-wall carbon nanotubes. The equilibrium adsorption data were analyzed using four widely applied isotherms: Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich. The results showed that the Langmuir isotherm model fits well the obtained experimental data. The adsorption process followed the ...


    By IWA Publishing

  • Cadmium ion adsorption by amine-modified activated carbon

    Cadmium (Cd) is one of the most toxic metals found in water and sediments. In the effort to develop an effective adsorbent for aqueous Cd removal, activated carbon (AC) was modified with an amino-terminated organosilicon (3-aminopropyltrimethoxysilane, APS). Response surface methodology was used to optimize selected operational parameters of adsorption of aqueous Cd by considering a central ...


    By IWA Publishing

  • Molecular gas filtration: chemisorption versus physisorption

    Advantages of chemisorption over physisorption in molecular gas filtration. To remove pollutant compounds in air, both spherical and pelletized solid products are widely used. Examples of their application include Indoor Air Quality, Corrosion in Control Rooms, In Vitro Fertilisation, and Odours. What all these ...


    By Bioconservacion SA

  • Adsorption of crystal violet with diatomite earth&carbon by a modification of hydrothermal carbonization process

    The high colority and difficulty of decolorization are the most important tasks on printing and dyeing wastewater. This study investigates the ability of diatomite earth&carbon (DE&C) as an adsorbent to removal crystal violet (CV) from aqueous solutions. Fourier transform infrared spectroscopy results indicate the importance of functional groups during the adsorption of CV. The ...


    By IWA Publishing

  • Cadmium(II) adsorption by activated carbon: batch studies and reversibility

    Adsorption of cadmium(II) by Brazilian activated carbons, in their original and nitric acid activated forms, was evaluated. The equilibrium was reached within the first 15 min of contact between carbon and metal solution, and obeys a pseudo-second order Lagergren model. The maximum adsorption capacity is higher than 64 mg/g for the oxidised sample. Negative ΔG0 values indicate the spontaneity of ...


    By Inderscience Publishers

  • Catalytic/Adsorptive Carbon Testing for Odor Control at Indian River County, Florida

    Untitled Document Most of Central Florida withdraws water from the Floridian Aquifer by means of deep wells. The water that comes ...


    By Calgon Carbon Corporation

  • Acid dyes adsorption onto activated carbon from waste tyres

    Activated carbon has been produced from waste tyres using chemical treatment. The effects of activation chemical used, chemical ratio, soaking time in the impregnation step, activation temperature and time duration of the activation step were investigated. Surface area, pore size distribution, total pore volume, adsorption capacities of acid dyes (AY117 & AB25) were determined. The carbon product ...


    By Inderscience Publishers

  • Kinetics of enhanced adsorption by polarization for organic pollutants on activated carbon fiber

    The adsorption kinetics for model pollutants on activated carbon fiber (ACF) by polarization was investigated in this work. Kinetics data obtained for the adsorption of these model pollutants at open-circuit, 400 mV, and −400 mV polarization were applied to the Lagergren equation, and adsorption rate constants (K a) were determined. With the anodic polarization of 400 mV, the capacity of ...


    By Springer

  • Mechanisms on formation of hierarchically porous carbon and its adsorption behaviors

    Using simple one-step carbonization-activation, the residues of paulownia flowers are employed as a precursor to prepare hierarchically porous activated carbon. After investigating the optimum conditions, the obtained paulownia flowers based activated carbon (PFAC) is characterized by Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, ...


    By IWA Publishing

  • Adsorption of cadmium(II) from aqueous solutions by thiol-functionalized activated carbon

    Thiol groups of adsorbent surfaces offer strong affinities for heavy metal ions, such as Hg(II), Pb(II), Cd(II), and so on. In this study, thiol group was impregnated to activated carbon by a series of treatments of oxidation and chlorination followed by 1,2-ethanedithiol introduction in order to investigate the adsorption properties of Cd(II) in aqueous solution. Batch sorption experiments were ...


    By IWA Publishing

  • Studies on competitive adsorption of dyes onto carbon (XC-72) and regeneration of adsorbent

    Carbon as an adsorbent has been widely studied for wastewater treatment, but the regeneration of adsorbent has been scarcely reported. In this paper, an economical and environmental method was applied to regenerate carbon (XC-72). Results showed that both anhydrous ethanol and deionized water did not obtain optimal effect for the desorption of Acid Orange 7, Ponceau 2R and Rhodamine B, but the ...


    By IWA Publishing

  • Phenol adsorption by activated carbon produced from spent coffee grounds

    The present work highlights the preparation of activated carbons (ACs) using spent coffee grounds, an agricultural residue, as carbon precursor and two different activating agents: water vapor (ACW) and K2CO3 (ACK). These ACs presented the microporous nature and high surface area (620–950 m2 g−1). The carbons, as well as a commercial activated carbon (CAC) used as reference, were evaluated as ...


    By IWA Publishing

  • Adsorption characteristics of Bisphenol-A on tailored activated carbon in aqueous solutions

    The adsorption behavior of pharmaceuticals and personal care product, Bisphenol-A (BPA), according to four coal-based and four wood-based granular activated carbons modified using outgassing treatment, acidic treatment or alkaline treatment was studied. The adsorption isotherm results indicated that carbon surface acidity played a very important role in the adsorption of BPA. It was found that ...


    By IWA Publishing

  • Removal of Pb(II) by adsorption onto Chinese walnut shell activated carbon

    The excessive discharge of Pb(II) into the environment has increasingly aroused great concern. Adsorption is considered as the most effective method for heavy metal removal. Chinese walnut shell activated carbon (CWSAC) was used as an adsorbent for the removal of Pb(II) from aqueous solution. Batch experiments were conducted by varying contact time, temperature, pH, adsorbent dose and initial ...


    By IWA Publishing

  • Adsorption of dyes onto activated carbon prepared from olive stones

    Activated carbon was produced from olive stones (OSAC) by a physical process in two steps. The adsorption character of this activated carbon was tested on three colour dyes molecules in aqueous solution: Methylene blue(MB), Rhodamine B (RB) and Congo Red (CR). The adsorption equilibrium was studied through isotherms construction at 30°C, which were well described by Langmuir model. The adsorption ...


    By IOS Press

  • Experimental study and modelling of zinc adsorption by granular activated carbon and natural zeolite

    The metal removal capability of Granular Activated Carbon (GAC) and natural zeolite is evaluated in this study using zinc as a model adsorbate. The equilibrium and kinetic characteristics of zinc adsorption on GAC and natural zeolite were studied in batch stirred tank experiments. The adsorption data for both systems were fitted by Langmuir, Freundlich, Langmuir-Freundlich, and Redlich-Peterson ...


    By Inderscience Publishers

  • Modeling the adsorption of emerging contaminants on activated carbon: classical and quantum QSAR approaches

    The adsorption of 115 emerging contaminants, mainly organic chemicals identified by the US Environmental Protection Agency's 2009 Contaminant Candidate List 3, was ranked using two published classical quantitative structure-activity relationship (QSAR) models and a newly developed quantum QSAR model. Approximately 75% of the investigated contaminants were predicted to be ...


    By IWA Publishing

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