carbon adsorption Articles
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Adsorption of phenol and
p -chlorophenol from aqueous solutions by magnetic nanopowderA new magnetic iron oxide nanopowder (MNM) was prepared, characterized and tested as adsorbent for the removal of phenol and p-chlorophenol (PCP) from aqueous solution. The iron oxide was obtained by a new combustion method which allows the direct obtaining of magnetic nanopowder covered with some organic residues resulting from fuel combustion. The magnetic powder was characterized in terms of ...
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Off-Gas Treatment Technologies for Soil Vapor Extraction Systems: State of the Practice
Untitled Document EXECUTIVE SUMMARY This document provides state-of-the-practice information on off-gas treatment technologies for soil vapor extraction (SVE) systems currently being used to clean up hazardous waste sites. It provides information on a wide variety of processes, including common practices as well as innovative emerging alternatives to illustrate the state ...
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Removal of micropollutants from municipal wastewater by graphene adsorption and simultaneous electrocoagulation/electrofiltration process
In this work the optimal operating conditions for removing selected micropollutants (also known as emerging contaminants, ECs) from actual municipal wastewater by graphene adsorption (GA) and simultaneous electrocoagulation/electrofiltration (EC/EF) process, respectively, were first determined and evaluated. Then, performance and mechanisms for the removal of selected phthalates and ...
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Selecting VOC Oxidizer
Nacah Tech's President, Bob Keibler presents How to select the proper type of thermal oxidizer or process gas treatment method. The paper presents details on what parameters of a process gas to be treated determine which treatment method / oxidizer provides the best efficiency, plant flexibility, heat recovery method, etc. while maintaining the target emission rates. Begining with the basic 3T's ...
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Common Treatment Technologies for Halogenated SVOCs in Ground Water, Surface Water, and Leachate
It may be necessary to know other subsurface information to remediate halogenated semivolatile organics in water. Treatability studies may be required to determine the contaminant biodegradability for any biodegradation technologies. Treatability studies are also necessary to ensure that the contaminated ground water can be treated effectively at the design flow. A subsurface geologic ...
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Method for remediation of aquifers
The US Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of contract F41624-99 C-8033 awarded by the United States Air Force Material Command. BACKGROUND OF THE INVENTION 1. Field of the InventionThis invention relates to the remediation of contaminated ...
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Evaluating odour control technologies using reliability and sustainability criteria – a case study for water treatment plants
Technologies for odour control have been widely reviewed and their optimal range of application and performance has been clearly established. Selection criteria, mainly driven by process economics, are usually based on the air flow volume, the inlet concentrations and the required removal efficiency. However, these criteria are shifting with social and environmental issues becoming as important ...
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Remediation of phenanthrene contaminated soils by nonionic–anionic surfactant washing coupled with activated carbon adsorption
Batch experiments were conducted to investigate the performance of nonionic–anionic mixed surfactants and their recovery through activated carbon. The solubilization capabilities of mixed surfactants toward phenanthrene (PHE) were reduced by addition of anionic surfactant to the mixed systems. Results showed that sorption of Triton X-100 (TX100) onto soil decreased with increasing mass ...
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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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Analysis of adsorption equilibrium for aqueous solution of weak organic electrolyte-activated carbon system
Several models for the adsorption of weak organic electrolytes on activated carbons from dilute aqueous solutions have been reported recently. It is apparent, however, that the electrokinetics of carbon surface has not been sufficiently addressed by these studies. The present treatment therefore employed the fundamental concepts provided by these studies, in conjunction with electrokinetic ...
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Chlorate adsorption from chlor-alkali plant brine stream
Chlorates are present in the brine stream purged from chlor-alkali plants. Tests were conducted using activated carbon from coconut shell, coal or palm kernel shell to adsorb chlorate. The results show varying levels of adsorption with reduction ranging between 1.3 g/L and 1.8 g/L. This was higher than the chlorate generation rate of that plant, recorded at 1.22 g/L, indicating that chlorate ...
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International Paints LLC - VOCs - Case Study
About the Project Summary Union, NJ — Operations management at International Paint LLC here reports dramatic savings in compliance costs for Volatile Organic Compound (VOC) emissions, through replacement of a gas-fired thermal oxidation afterburner with a 3000-cfm, combination biofiltration and carbon adsorption, “end-of-pipe” VOC removal system. They also report eased ...
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IInternational Paints LLC - VOCs Case Study
About the Project Summary Union, NJ — Operations management at International Paint LLC here reports dramatic savings in compliance costs for Volatile Organic Compound (VOC) emissions, through replacement of a gas-fired thermal oxidation afterburner with a 3000-cfm, combination biofiltration and carbon adsorption, “end-of-pipe” VOC removal system. They also report eased ...
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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 ...
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Effects of Starting Material on Activated Carbon Characteristics and Performance
Untitled Document The objective of this article is to demonstrate how the choice of starting material determines potential carbon product properties. Activation can only "develop" an activated carbon skeleton, using the building blocks supplied by the original starting material. The resultant activated carbon skeleton defines the adsorption pore structure and ...
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Production and characterization of lignocellulosic biomass-derived activated carbon
The goal of this work is to establish the technical feasibility of producing activated carbon from pulp mill sludges. KOH chemical activation of four lignocellulosic biomass materials, two sludges from pulp mills, one sludge for a linerboard mill, and cow manure, were investigated experimentally, with a focus on the effects of KOH/biomass ratio (1/1, 1.5/1 and 2/1), activation temperature ...
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Removal of humic substances using solar irradiation followed by granular activated carbon adsorption
This study proposed a new method using freely available sunlight and granular activated carbon (GAC) adsorption for enhanced removal of humic substances (HS). Experiments were carried out under natural sunlight conditions in winter and summer. A parabolic solar collector (PC) was applied to concentrate solar energy. HS were characterized by UV254 absorbance, dissolved organic carbon (DOC) ...
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Case Study: Odor Abatement Solutions
Odor issues related to industrial processes are not uncommon. An odor is caused by one or more volatilized organic compounds (VOCs) that humans can perceive by the sense of smell. The challenge is that “odor is subjective, and what is sweet to some, can be a nuisance to others. In most cases the compounds that create the offensive odors are not present in sufficient concentrations to ...
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Ex Situ Physical/chemical Treatment for Ground Water, Surface Water, and Leachate
The main advantage of ex situ treatment is that it generally requires shorter time periods, and there is more certainty about the uniformity of treatment because of the ability to monitor and continuously mix the ground water. Ex situ treatment, however, requires pumping of ground water, leading to increased costs and engineering for equipment, possible permitting, and material handling. ...
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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
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