activated carbon impregnated Articles

Replacement of hazardous chromium impregnating agent from silver/copper/chromium-impregnated active carbon

Activated carbon (AC) is widely used as an effective adsorbent in many applications, including industrial-scale air purification systems and air filter systems in gas masks. In general, ACs without chemical impregnation are good adsorbents of organic vapors but poor adsorbents of lowmolecular-weight or polar gases such as chlorine, sulfur dioxide (SO2), formaldehyde, and ammonia (NH3). ...

Mar. 2, 2009

By Air & Waste Management Association (A&WMA)

Removing mercury with activated carbon

Granular Activated carbon is effective at physically adsorbing trace components from gas streams due to its high population of micropores; however, the capacity is low. By impregnating the granular activated carbon with a compound that will chemically react with the mercury, capacity can be enhanced. It is imperative that not only must the mercury be removed to non-detectable levels but that it ...

Feb. 17, 2013

By TIGG, LLC

Performance evaluation of metal impregnated activated carbon composite for removal of fluoride under varying solution chemistry

The objectives of this study are to optimize the synthesis conditions of metals such as aluminum (Al), iron (Fe) and cerium (Ce) impregnated activated carbon composites (AC-M) for fluoride removal and to evaluate the sorption behavior of fluoride by the composite under varying solution chemistry. To achieve the objectives, several composites were prepared with different combinations of Al, Ce ...

Mar. 21, 2017

By IWA Publishing

Application of impregnated almond shell activated carbon by zinc and zinc sulfate for nitrate removal from water

Nitrate is a wide spread contaminant in both ground and surface water due to excessive use of nitrogenous fertilizers in agricultural activities and disposal of untreated sanitary and industrial wastes (Hudak,2000 ; Almasri and Kaluarachchi,2004). Elevated nitrate concentrations in drinking water are linked to health problems such as ethemoglobinemia in infants and stomach cancer in adults. ...

Mar. 2, 2008

By University of Tehran

Aluminum–cerium double-metal impregnated activated carbon: a novel composite for fluoride removal from aqueous solution

Several studies have focused on the application of layered double hydroxide or nanoparticle based adsorbent for removing fluoride. The objectives of this study are to impregnate aluminum (Al) and cerium (Ce) within the pore spaces of activated carbon (AC) for removal of fluoride from water and to evaluate the partitioning behavior of fluoride by the double-metal-AC composite. To achieve the ...

Jul. 10, 2016

By IWA Publishing

The Dangers of Hydrogen Sulfide and Filtration with Activated Carbon

Hydrogen sulfide (H2S) is a poisonous, highly flammable, colorless gas that is associated with a ‘rotten egg’ odor. As stated by cchealth.org, “hydrogen sulfide is created naturally by decaying organic matter and is released from sewage sludge, liquid manure, and sulfur hot springs.” It also is a by-product from industrial processes such as natural gas processing, ...

Jun. 30, 2013

By General Carbon Corporation

Enhanced adsorption of quaternary amine using modified activated carbon

This study examined different methodologies to modify activated carbon (AC) for the removal of quaternary amine, tetramethylammonium hydroxide (TMAH), from water. Commercial carbon (WAC) was treated by nitric acid oxidation (NA-WAC), silica impregnation (SM-WAC0.5), and oxygen plasma (P10-WAC), and their characteristics and adsorption capacity were compared. The Langmuir model fitted the ...

May 19, 2014

By IWA Publishing

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 ...

Jun. 7, 2009

By Inderscience Publishers

Distribution of iron in activated carbon composites: assessment of arsenic removal behavior

The main objectives of this study were to evaluate the effectiveness of using iron impregnated granular activated carbon (AC) to remove arsenic from water and to assess the partitioning behavior of arsenic under a variety of conditions. Iron impregnated granular activated carbon (AC-Fe) composites were prepared with different ferric (Fe+3) concentrations, ranging from 0.09 to 3.0 M. These ...

Apr. 29, 2015

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 ...

Feb. 28, 2011

By IWA Publishing

Cd(II) removal on surface-modified activated carbon: equilibrium, kinetics and mechanism

Commercial pulverous activated carbon (AC-0) was modified through two steps: oxidize AC-0 acid firstly, impregnate it with iron using ferric chloride secondly. Orthogonal experiment was conducted then to prepare modified activated carbon with high Cd(II) adsorption capacity (ACNF). Batch adsorption experiments were undertaken to determine the adsorption characteristics of Cd(II) from aqueous ...

Jul. 15, 2016

By IWA Publishing

Wet hydrogen peroxide catalytic oxidation of phenol with FeAC (iron-embedded activated carbon) catalysts

This investigation aims at exploring the catalytic oxidation activity of iron-embedded activated carbon (FeAC) and the application for the degradation of phenol in the wet hydrogen peroxide catalytic oxidation (WHPCO). FeAC catalysts were prepared by pre-impregnating iron in coconut shell with various iron loadings in the range of 27.5 to 46.5% before they were activated. The FeAC catalysts were ...

Feb. 28, 2010

By IWA Publishing

Application of response surface methodology to optimize the fabrication of ZnCl2-activated carbon from sugarcane bagasse for the removal of Cu2+

The present study focused on the application of response surface methodology to optimize the fabrication of activated carbon (AC) from sugarcane bagasse for adsorption of Cu2+ ion. The AC was synthesized via chemical activation with ZnCl2 as the activating agent. The central composite design based experiments were performed to assess the individual and interactive effect of influential ...

Feb. 12, 2017

By IWA Publishing

Methylene blue removal using a low-cost activated carbon adsorbent from tobacco stems: kinetic and equilibrium studies

The aim of this study was to prepare activated carbon from tobacco stalks using microwave heating. The prepared activated carbon was applied as an adsorbent in methylene blue (MB) removal from water. The optimum conditions for activated carbon preparation were a radiation power of 280 W for a period of 6 minutes after the impregnation of the precursor material with 30% ZnCl2 for 24 hours. The ...

Feb. 28, 2017

By IWA Publishing

Activated Carbons Prepared through H3PO4-Assisted Hydrothermal Carbonisation from Biomass Wastes: Porous Texture and Electrochemical Performance

Hydrothermal treatment of biomass in the presence of phosphoric acid is proposed for the production of activated carbons (ACs). Interestingly, H3PO4 promotes the fixation of carbon atoms in the solid during hydrothermal treatment, which renders higher preparation yields than those of the conventional impregnation method. Upon carbonisation of the resulting hydrochars at ...

Nov. 6, 2016

By SusChem

Preparation, characterization, and application of activated carbon from low-cost material for the adsorption of tetracycline antibiotic from aqueous solutions

In this study, a new zinc chloride (ZnCl2) impregnated activated carbon (Zn-AC) was prepared from oak charcoals as low-cost material and used as adsorbent for tetracycline (TC) adsorption. The Zn-AC was characterized using field emission-scanning electron microscope, powder X-ray diffraction, and CHNS-O analyses. Specific surface area of the adsorbent was also measured using the Brunauer, ...

Sep. 2, 2016

By IWA Publishing

Preparation of mesoporous activated carbon from palm-date pits: optimization study on removal of bentazon, carbofuran, and 2,4-D using response surface methodology

Palm-date pits were used to prepare activated carbon by physiochemical activation method, which consisted of potassium hydroxide (KOH) treatment and carbon dioxide (CO2) gasification. The effects of variable parameters, activation temperature, activation time and chemical impregnation ratios (KOH: char by weight) on the preparation of activated carbon and for removal of pesticides: bentazon, ...

Oct. 17, 2013

By IWA Publishing

Activities of different metal oxide catalysts on NO reduction and CO oxidation

A series of transition metal oxide catalysts (Zn, Ti, Cu, Ni, Fe and V) supported on Al2O3 and SiO2 were prepared using the incipient wetness impregnation method. Their performances on NO reduction and CO oxidation followed the sequence of TiO2 > CuO/ZnO > CuO > ZnO. TiO2 supported on SiO2 was more active than that on Al2O3, while ZnO had the opposite performances. The activities of CuO/Al2O3 and ...

Apr. 7, 2009

By Inderscience Publishers

Waste Transfer Station Odours - Case Study

Application Greenstar Ltd. who operate the large waste transfer station at Ballyogan needed to ensure working conditions inside the building were acceptable to the workforce and that the surrounding area did not suffer from odourous emissions. An early part of the design process called for an efficient extraction system to draw air from the Reception Hall and the Baling Hall to meet these ...

Sep. 20, 2010

By ERG (Air Pollution Control) Ltd

Preparation and catalytic performance of copper-containing magnetic catalysts for degradation of azo dye (direct violet)

A novel magnetically separable magnetic activated carbon supporting-copper (MCAC) catalyst for catalytic wet peroxide oxidation (CWPO) was prepared by chemical impregnation. The prepared samples were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) method, and scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS). The catalytic performance ...

Aug. 28, 2017

By IWA Publishing

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