carbon adsorption Articles
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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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Adsorption separation of CO2 from simulated flue gas mixtures by novel CO2 "molecular basket" adsorbents
Adsorption separation of CO2 from simulated flue gas mixtures containing CO2, O2, and N2 by using a novel CO2 "molecular basket" adsorbent was investigated in a flow adsorption separation system. The novel CO2 "molecular basket" adsorbents were developed by synthesising mesoporous molecular sieve MCM-41 and modifying it with polyethylenimine (PEI). The influence of operation conditions, including ...
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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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PP activated carbon adsorption tower product introduction
Overview of pp activated carbon adsorption tower: The working environment of each part of the PP adsorption tower is made of resin with good acid and alkali resistance and high structural strength, and the appearance is made of resin with good waterproof and anti-aging properties. In order to increase the strength of the tower, a number of longitudinal reinforcement ribs are used for the tower ...
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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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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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Fate of SiC and TiC nanoparticle dispersions in human reconstituted gastric fluid
In this work, we explore the evolution of the physicochemical properties of silicon carbide and titanium carbide nanoparticles in human reconstituted gastric fluid in the conditions of a normal digestion. The nanoparticles were pre–dispersed in water or in a pluronic F108 solution. Key parameters as the particle size distribution and the surface composition of the nanoparticles were monitored. ...
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Separating micro pollutants by an innovative membrane process.
Combined adsorption of micro pollutants on activated carbon and membrane filtration of MICRODYN-NADIR has proven an alternative to the established activated carbon/precipitation/sand filtration process. Contamination of the environment by micro pollutants has clearly been proved by now. Due to the high concentration of microorganisms and the contamination by antibiotics coming from animal ...
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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 ...
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Adsorption kinetics and thermodynamics of anionic dyes onto sewage sludge derived activated carbon
The adsorption kinetics and thermodynamics of two anionic dyes (Reactive Brilliant Red K-2BP and Acid Scarlet GR) on the Sewage Sludge Derived Activated Carbon (SAC) were studied by batch adsorption tests. It was found that, for Reactive Brilliant Red K-2BP, four kinetic models, i.e., the pseudo-second-order model, the modified pseudo-first-order model, the pseudo-first-order model, and the ...
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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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Introduction of scrubber + activated carbon adsorption exhaust gas purification device
Washing tower + activated carbon adsorption exhaust gas purification device It is suitable for the treatment of waste gas with low concentration and non-single components. The granular dust, smoke and grease can be removed through the water shower tower. The treated waste gas is absorbed by the activated carbon adsorption tower. The function of the water shower tower is to purify the waste gas ...
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Laboratory waste gas treatment solutions
The target pollutants emitted by the laboratory are ranked in the order of potential emission intensity and control necessity: small molecular gas pollutants, specific organic pollutants (formaldehyde, xylene, methanol), biological pollutants (pathogenic microorganisms and their aerosols) ), odor, other TVOCs (ether, benzene and other macromolecular organic substances), particulate matter. There ...
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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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Common Treatment Technologies for Nonhalogenated SVOCs in Ground Water, Surface Water, and Leachate
It may be necessary to know other subsurface information to remediate nonhalogenated 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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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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Adsorption efficiency of natural materials for low-concentration cesium in solution
In this study, several natural materials were investigated in order to clarify their potential use as cesium (Cs) adsorbents in situ. Four materials – carbonized rice hull, beech sawdust, oak sawdust, and charcoal (Japanese cedar) – which were previously shown to have Cs adsorption capabilities, were examined. Cs adsorption experiments were conducted using different initial Cs and adsorbent ...
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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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The waste gas treatment solutions of pharmaceutical factory laboratory
The composition of waste gas in drug research and development laboratories is relatively complex, mainly including inorganic acid-base waste gas and organic waste gas. Therefore, the waste gas treatment of drug research and development laboratories is divided into inorganic waste gas treatment and organic waste gas treatment. The inorganic waste gas treatment method adopts the spraying acid-base ...
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