activated carbon adsorption Articles
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Activated carbon adsorption tower design parameters
ACTIVATED CARBON ADSORPTION TOWER - calculation book activated carbon adsorption towerDesign air volume: Q=20000m3/h=5.56m3/s.Parameter design requirements: ①Pipeline wind speed: V1=10~20m/s,②The superficial gas velocity is the velocity of the gas passing through the entire cross-section of the adsorber. Empty tower wind speed: V2=0.8~1.2m/s,③Filtering wind speed: V3=0.2~0.6m/s,④Filter residence ...
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Commonly used waste gas treatment: activated carbon adsorption method
Activated carbon adsorption method Principle of Contamination Activated carbon adsorption method is a widely used method of VOCs treatment due to low initial investment. It adsorbs VOCs through the natural adsorption capacity of activated carbon. When the adsorption is saturated, the activated carbon is desorbed and regenerated or handed over to professional hazardous waste companies for ...
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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 ...
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Adsorption kinetics, isotherms and thermodynamics of atrazine removal using a banana peel based sorbent
Atrazine removal from water by treated banana peels was studied. The effect of pH, contact time, initial atrazine concentration, and temperature were investigated. Batch experiments demonstrated that 15 g L−1 adsorbent dosage removed 90–99% of atrazine from 1–150 ppm aqueous solutions. The removal was both pH and temperature dependent with the most atrazine removed between pH 7 and 8.2 and ...
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Adsorption performance of coconut shell activated carbon for the removal of chlorate from chlor-alkali brine stream
Activated carbon from coconut shell was used to investigate the adsorption of chlorate from a chlor-alkali plant's brine stream. The effect of pH, flowrate, chlorate and chloride concentration on the breakthrough curves were studied in small-scale column trials. The results obtained show enhanced adsorption at low flowrates, higher chlorate concentrations, and at a pH of 10. These studies ...
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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 ...
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The use of step and pulse tests to design activated carbon adsorption columns for recovery of copper ions from aqueous industrial effluents
Dynamic experiments were carried out on the adsorption of copper ions in a laboratory packed bed of activated carbon. Both pulse and step change inputs were used. Measurements were reproducible and replicate measurements furnished nearly identical parameters for a conventional heterogeneous model of the activated carbon bed, assuming a Langmuir adsorption isotherm. Bed depth had little effect on ...
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Determination of reaction rate constants for phenol oxidation using SnO2/Ti anodes coupled with activated carbon adsorption in the presence of TiO2 as catalyst
Series of experiments for phenol degradation with assistance of TiO2 catalyst at pH of 6.5 and temperature of 25°C were conducted using a lab-scale electrochemical reactor constructed in our laboratory. According to the results, at the presence of the TiO2 catalyst the removal of phenol was increased and first-order kinetics could describe the evolution of phenol concentration. For inspecting ...
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Acid Gas Removal Unit
What is acid gas? Very strictly speaking, an acid gas is any gaseous compound that forms an acidic solution when dissolved in water. While there are many types of acid gases, the most prevalent are carbon dioxide (CO2) and hydrogen sulfide (H2S). These chemicals are commonly found in natural gas deposits but render the gas unusable. They are not toxic when they come into contact with people, they ...
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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 ...
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Membrane fouling mitigation by activated carbon addition in activated sludge filtration
Activated carbon (AC) was added into the activated sludge to alleviate membrane fouling during sludge microfiltration. The fouling mitigation profiles were evaluated at different AC sizes and doses by a single-fibre microfiltration system. It was found that the granular AC added in the sludge suspension can absorb the organic substances in the sludge in a certain level, including biopolymer ...
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Separated adsorption and bacterial degradation of microcystins in GAC filtration
For removal of microcystins from drinking water, Granular Activated Carbon (GAC) filtration has shown to be promising as it is not only an efficient adsorbent, but also can support biodegradation of microcystins, extending the lifetime of this application. In this study, a sterile and non-sterile GAC column, in addition to a sand column, was studied to distinguish the adsorption and ...
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Advanced treatment of landfill leachate membrane concentrates: performance comparison, biosafety and toxic residue analysis
With the improvement of people's consciousness about health, more attention has been paid to the biosafety of effluent reaching conventional discharge standard. In this contribution, removal efficiency of chemical oxygen demand (COD), acute toxicity, genotoxicity and estrogenicity in landfill leachate membrane concentrates (MCs) among UV-Fenton, Fenton and activated carbon adsorption process ...
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Base Tests Common Cleanup Solution at Uncommon Site
The Air Force has installed a granular activated carbon (GAC) adsorption system to remove contamination from groundwater at a remote Air Force Research Laboratory (AFRL) Propulsion Directorate ...
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Application of air stripping to powdered activated carbon adsorption of geosmin and 2-methylisoborneol
Removal of odor-causing compounds (OCCs) including geosmin and 2-methylisoborneol (2-MIB), well known to cause the musty and earthy odor in drinking water, was investigated using powdered activated carbon (PAC) adsorption and air stripping processes. Removal by air stripping was mainly affected by aeration flow rates with volumetric mass-transfer rates of 0.002–0.005 min−1. Aeration also proved ...
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Boron removal by activated carbon and microfiltration for pre-treatment of seawater desalination
This study aimed to enhance boron removal through powdered activated carbon adsorption (PAC) and application of a micro-filtration (MF) process as a pretreatment of a seawater reverse osmosis (SWRO) process. Batch and continuous experiments were conducted to investigate the effect of membrane filtration as well as PAC addition on boron removal in reconstituted seawater. In batch test, two kinds ...
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How can drinking water treatments influence chlorine dioxide consumption and by-product formation in final disinfection?
In this study water samples of different origins (subalpine lake, artificial lake and river) were treated by pre-oxidation, coagulation/flocculation, adsorption on granular activated carbon and disinfection. Different laboratory-scale tests were carried out to evaluate the treatment impact on ClO2 consumption in disinfection and on the formation of disinfection by-products (trihalomethanes, ...
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Pilot scale experiments on surface water treatment sequence including ozonation and adsorption processes
The paper presents results of the experimental studies on combined ozonation and activated carbon adsorption processes at the Water Treatment Plant (WTP) at Cracow (Poland). The study focused on the selection of an appropriate location of an ozonation process within the treatment scheme and on the choice of activated carbon grade for adsorption. Analysis of process efficiency in the proposed ...
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Automotive & metal industry - Case study
Automotive/Aeronautic/Metal industry (cars, trucks, planes, heavy machinery, components) faces increasing environmental requirements, especially on COD, metal removal and special molecules removal. Often residual metal levels, residual hydrocarbon or oil levels or surfactant content are a problem which traditional chemical or biological treatment plants cannot solve. Often a good and effective ...
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Quantitative structure property relationships for the adsorption of pharmaceuticals onto activated carbon
Isotherms were determined for the adsorption of five pharmaceutical residues, primidone, carbamazepine, ibuprofen, naproxen and diclofenac, to Calgon Filtrasorb 300 powdered activated carbon (PAC). The sorption behavior was examined in ultra-pure and wastewater effluent organic matter (EfOM) matrices, where more sorption was observed in the ultra-pure water for PAC doses greater than 10 mg/L ...
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