The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For comprehensive utilization of CO contained in closed carbide furnace tail gas, the purification of HCN in the artificial tail gas mixed with pure gases was studied by means of adsorption using modified activated carbon. In range of this study the optimum conditions for preparing modified activated carbon are: NaOH concentration is 10 wt% and sulfonated cobalt phthalocyanine (CoPcS) concentration...
Carbon nanotubes based sensors are gaining popularity due to their high selectivity, sensitivity, fast response and recovery time, low operating temperatures and low power consumption. However, due to a strong sp2 carbon-carbon bonding within CNTs, the interaction between defect free CNT walls and gas molecules had been expected to be relatively weak and consequently, the electronic transport properties...
We report on the response to the ambient air humidity of a surface acoustic wave (SAW) in YZ LiNbO3 substrate with the 200 nm-thick multi-layer graphene sheets deposited by chemical reduction from graphene oxide. With increasing relative humidity (RH), the SAW velocity decreases and the SAW attenuation increases. At humidity values below 60-65%, the SAW velocity linearly depends on RH with the slope...
This paper presents photoelectrochemical properties of multi-walled carbon nanotube assembled with CdSe quantum dots. CdSe QDs are adsorbed on the surface of MWCNTs with a diameter of 4-5 nm.
Summary form only given. The influence of alkali-metal adsorption positions and defects positions on work functions of (5, 5) single-walled carbon nanotubes (CNTs) with a capped edge had been investigated by first-principles calculations. An single-walled armchair (5, 5) CNT with a capped edge was assumed. A single vacancy defect was created by removing a carbon atom from different atomic layers (which...
We present a theoretical model for electrical double layers formed by ion adsorption in nanoscale carbon pores. In this work a combination of computational methods, including first-principles and classical modeling, are used to explain the onset of an anomalous increase in capacitance for small pores. The study highlights the key role played by pore curvature and nanoconfinement on the capacitance...
In this paper we present the relative work function measurements of Platinum (Pt), Molybdenum (Mo), Lead (Pb), and Graphite (C) by using Kelvin Probe. The obtained results have shown that the work function measurements made in air are affected by the adsorption of oxygen. To measure the “true” metal work function the oxide layer has to be removed. Moreover in the experiments...
The effectiveness of coagulation/flocculation/ sedimentation (CFS), carbon adsorption, and CFS+carbon adsorption for advanced treatment of a biologically treated coking plant effluent was studied. The CFS treatment was cost effective for producing an effluent reusable as cooling water (CODCr<;100 mg/L). Carbon adsorption accomplished the same recycling treatment at a higher cost. Both carbon type...
The effects of salinity and humic acid (HA) on di-n-butyl phthalate (DBP) adsorption by nutshell-based activated carbon were studied by batch experiments in this paper. Adsorption kinetics was evaluated. The kinetic curves were almost the same both in the presence and absence of NaCl, and second time adsorption occurred in the presence of HA. Three kinetic models, pseudo-first-order, pseudo-second-order...
Methyl tert-butyl ether (MTBE) is a common additive for producing a clean burning fuel with a higher Octane number and less emissions. Batch adsorptive capacity, continuous flow breakthrough and biological activated carbon (BAC) treatment experiments were conducted to compare the adsorptive capacities of four activated carbons for MTBE, to obtain the adsorptive capacity indicators useful for predicting...
The sludge carbon made from sewage sludge with ZnCl2 are used for gatifloxacin adsorption. Characterizing sludge carbon and researching mechanism of gatifloxacin adsorption on different adsorbents. The results showed: sludge carbon have large surface area and mid-hole structure. The adsorption keep to second kinetics model, that means chemical adsorption is the main progress. The research proves sludge...
Different expansion volume of expanded graphite was used for oil absorption experiments. The structure of expanded graphite was studied by scanning electron microscope (SEM) and optical microscope before oil-absorption and after oil-absorption. It was found that viscosity, expansion volume and particle size are the three key factors for the higher absorption capacity. But under the lower expansion...
The objective of this study is to further evaluate the relationship between removal effect of dissolved organic pollutants (DOC) and their characteristics (biodegradability, adsorbability and molecular size distribution) in different running stage of BAC filter. The experimental results showed that during early period of operation, BAC filter mainly removed adsorbable DOC (that is ADOC), but after...
Perfluorooctane sulfonate (PFOS) has increasingly attracted global concerns in recent years and has also been proposed as the candidates of persistent organic pollutants due to their world-wide distribution, environmental persistence and bioaccumulation potential. The adsorption mechanism of PFOS from aqueous solutions onto granular activated carbon (GAC) was investigated. The adsorption reaction...
Adsorption test for phenol-containing wastewater from a coking plant was carried out using Specially-made activated carbon. The reaction mechanism and influencing factors, such as the dosage of Specially-made activated carbon, pH, temperature and time on decomposition of phenol for the treatment of phenol-containing wastewater by Specially-made activated carbon were mainly studied. The proper conditions...
Tetracycline is a series of emerging pharmaceutical and personal care products (PPCPs), which has been caught increasing concern in recent years. As a new type of carbon materials, activated carbon fiber (ACF) demonstrates its excellent adsorption performance especially in organic pollutants removal. ACF was used for tetracycline removal by adsorption and the effect of ACF dosage, contact time, salinity,...
Surfactants have been widely used for extracting hydrophobic organic compounds from soils into aqueous phase. Non-ionic surfactants such as Triton X-100 and anionic surfactants such as SDS (sodium dodecyl sulphate) have been of particular interest because of their high solubilizing ability and low toxicity. However, the resulting wastewater that contains both surfactant and organic contaminants should...
In-situ experiments were conducted to study the adsorption isotherms of ClO4- and NO3- onto 6 kinds of activated carbon(25°C). The results shows adsorption capacity of GAC is bigger than PAC, and may have some relationship with the iodine value of carbon. Competition adsorption exists between NO3- and ClO4-. At NO3-:ClO4- = 5:1(mass ratio) in double component adsorption experiment, adsorption capacity...
For the advanced treatment of drinking water by activated carbon, the effects of adsorption on removal of dichloroacetic acid, dibromochloromethane, benzene and carbaryl in water, as well as the competitive adsorption between these pollutants were investigated with three different activated carbon (new carbon, regenerated carbon and used carbon). The results showed that good effect of the adsorption...
The adsorption modes of C on the clean Ni (111) surface had been investigated by first principles Density Functional Theory (DFT) within a periodic slab model and the generalized gradient approximation. The threefold hep and fee hollow sites on Ni (111) surface were preferred to be adsorbed strongly by the C atom with chemisorptions energy of-6.89 eV and -6.81 eV. The calculated binding energies had...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.