adsorption of organic compounds by activated carbon

... use of ion exchange and adsorbent resins for the removal of organic compounds Removal of inorganic ions by ion exchange resins and activated alumina is discussed in Chapter ADSORPTION THEORY Adsorption ... certain amount of a compound of interest ADSORPTION OF ORGANIC COMPOUNDS 13.7 from a mixture of adsorbable compounds is greater than if adsorption occurs without competition, because part of the adsorbent’s ... during adsorption Adsorption Kinetics Transport Mechanisms Removal of organic compounds by physical adsorption on porous adsorbents involves a number of steps, each of which can affect the rate of...

Ngày tải lên: 14/02/2014, 03:20

... preparation of iron-modified activated carbon (AC-Fe) was conducted by impregnation with 5% of iron onto AC (theoretical calculation based on weight) The impregnation method for preparation of AC-Fe ... LA/AC-Fe ratio of 0.3m/0.2m, flow rate of to 6mL/min (or space velocity of 0.98-1.47m3/m3h), pH of 7-8, and initial arsenic concentration of 0.1-0.5mg/L, to obtain a breakthrough time of more than ... AC-Fe as shown in the values of the regression coefficient r2 Therefore, adsorption process of arsenic onto LA and AC-Fe may be described by Langmuir isotherm and the adsorption capacities were...

Ngày tải lên: 05/09/2013, 09:38

... the method detection limit of the compound of interest Prepare reagent water by passing tap water through a filter bed containing about 0.5 kg of activated carbon or by using a water purification ... for determination of organic compounds in finished drinking water, source water, or drinking water in any treatment stage The method is applicable to a wide range of organic compounds that are ... acetone at a concentration of 500 µg/mL of each This solution is used in the preparation of the calibration solutions Dilute a portion of this solution by 10 to a concentration of 50 µg/mL and use this...

Ngày tải lên: 22/03/2014, 14:20

... properties of activated carbons Carbon, 37(8), 1323 –1332 Moreno-Castilla, C., Lopez-Ramon, M V & Carrasco-Marin, F (2000) Changes in surface chemistry of activated carbons by wet oxidation Carbon, ... carbons Carbon, 1(1), 3–9 Noh, J S & Schwarz, J A (1990) Effect of HNO3 treatment on the surface acidity of activated carbons Carbon, 28(5), 675–682 Pradhan, B K & Sandle, N K (1999) Effect of ... removal of RO16 dye by Cu-AC4 catalyst in the presence of UV, H2O2 and H2O2 /UV Journal of Physical Science, Vol 21(2), 29–40, 2010 37 The presence of H2O2 and H2O2/UV enhanced the colour removal by...

Ngày tải lên: 07/08/2014, 14:20

... 2Institute of Anatomy, Division of Histology, University of Bern, Bern, Switzerland Division Neonatology, Department of Paediatrics, Inselspital and University of Bern, Bern, Switzerland 4Department of ... Thulin E, Radford SE, Dawson KA: Nucleation of protein fibrillation by nanoparticles Proceedings of the National Academy of Sciences of the United States of America 2007, 104:8691-8696 35 Owens DE, ... Page of of the study and made substantial contributions to the analysis and interpretation of the data HFK and PG made substantial contributions to the analysis and interpretation of the data BY...

Ngày tải lên: 11/08/2014, 00:22

... second and fourth carbon atoms in the parent chain Name the compound in order of: number of carbon atom-alkyl group attached(number of carbon atom-alkyl group attached- etc ) name of parent compound ... properties of another class of compounds A Halogen Derivatives of Hydrocarbons Functional Group: - X (F, Cl, Br, I) General Formula: R-X Naming of Halides Halogens attached to a hydrocarbon chain ... of a chain of that is double bonded to another carbon atom will be bonded to one carbon atom and one hydrogen atom A carbon atom on the end of a chain that is triple bonded to another carbon atom...

Ngày tải lên: 14/02/2014, 08:20

... amount of prothrombin activated was then determined using S-2238 [2] APC-catalyzed inactivation of FVa Time courses of FVa inactivation by APC were determined by following the loss of FXa cofactor ... courses of inactivation of 1.5 nM FVa by 0.32 nM APC in the absence (s) or presence (d) of 25 IUÆmL)1 UFH (B) FVa (1.5 nM) was inactivated with 0.32 nM wild-type APC After of incubation, indicated by ... a time course of Fig Effect of heparin on the APC-catalyzed inactivation of FVa Plasma purified human FVa was inactivated by recombinant wild-type APC in the absence and presence of UFH as described...

Ngày tải lên: 19/02/2014, 13:20

... the vapor pressure of even the most volatile solvent (such as acetone) is sufficiently reduced to allow stable plasma operation Removal of carbon The presence of high levels of organic solvent in ... case of non water-soluble organic solvents, oxygen cannot be derived from the water solvent and so another source of oxygen is required For this second group of organic solvents, the oxygen for carbon ... lead to deposition of carbon (soot) on the sampling cone, eventually leading to clogging of the cone orifice and a reduction in sensitivity To prevent carbon deposition, the carbon in the sample...

Ngày tải lên: 05/03/2014, 21:20

... thickness of the ONWs is of the order of several ångström, the observed LDOS is a convolution of the LDOS of the SiNWs and that of the adsorbed PQ aggregates Therefore, the contribution of the LDOS of ... connectivity between the organic compound and the inorganic substrate (see Fig 6) The electronic properties of the 1D organic nanowires (ONWs) obtained upon exposure of the SiNWs to L of PQ are investigated ... amount of time for diffusion of THAP molecules is given, the adsorption remains non preferential Having established that no preferential adsorption of THAP on the SiNWs is observed, we proceeded by...

Ngày tải lên: 16/03/2014, 15:35

... properties to Program Offices (e.g., Office of Water, Office of Solid Waste and Emergency Response, Office of Prevention, Pesticides and Toxic Substances) and Regional Offices Also, SPARC has been used ... pKa's in water of 3685 organic compounds The overall RMS deviation was equal to 0.37 This test does not include carbon acid The majority of the molecules are complex, e.g., some of the molecules ... estimate of the physicochemical parameters of organic compounds for physical and chemical fate process models when measured data are not available, guidelines for ranking a large number of chemical...

Ngày tải lên: 22/03/2014, 14:20

... first of a series of papers on the experimental determination of Ah H of 51 hydrocarbons containing from to 10 carbon atoms They pointed out that, while experimental measurement of the energy of ... Hydrogenation of unsaturated hydrocarbons always gives off heat, hence the molar enthalpy change of hydrogenation Ahyd//298 is always negative Heats ofHydrogenation The molar enthalpy of formation A{H of ... Experimental and Computational Hydrogen Thermochemistry of Organic Compounds Experimental and Computational Hydrogen Thermochemistry of Organic Compounds Long Island University, USA l i p World Scientific...

Ngày tải lên: 01/04/2014, 10:53

... LIBRARY OF THK UNIVERSITY OF CALIFORNIA Accession No /$ fa fa fa) - /J.^ &> No p U U L? ELECTROLYSIS AND ELECTROSYNTHESIS OF ORGANIC COMPOUNDS BY DR WALTHER LOB, Privatdocent in the University of ... decomposition of i.e., hydrogen, oxygen, etc., organic are the compounds, result of primary decomposition of the organic electrolyte a systematic description would therefore be better of the results ... the formation of the acid salt occurs, after a longer period of electrolysis theless the continuous, Never- though limited, evolution of carbon dioxide and carbon monoxide a proof of is partial...

Ngày tải lên: 02/04/2014, 16:00

... replaced by the energy Attackable anodes, which are brought into solution by the anions of the electrolyte, are of no value, or only of a wholly secondary one, in the electrolysis of organic compounds ... Concerning the Binding of Nitrogen to Organic Substances 279 Behavior of Vapors towards Tesia-currents 288 L I S T OF AUTHORS INDEX , 293 297 ELECTROCHEMISTRY OF ORGANIC COMPOUNDS INTRODUCTION ... line of work It has already been mentioned that our knowledge of the action of the glow and convective discharge on carbon compounds is extremely insignificant The varied properties of organic...

Ngày tải lên: 16/04/2014, 11:20

... mode of life Now I have chosen the case of the whale and porpoise group because they offer so extreme an example of profound modification of structure in adaptation to changed conditions of life ... the theory of design, or system of teleology, as presented by the school of writers which I have named, I hold that Mr Darwin's theory has no point of logical contact with the theory of design ... principle of scientific classification is the comparing of organism with organism, with the view of seeing which of the constituent organs are of the most invariable occurrence, and therefore of the...

Ngày tải lên: 28/06/2014, 19:20

... was said that the behavior of different OH groups in polyphenolic compounds is largely influenced by the neighboring groups and by the geometry, which are performed by the conjugation systems ... distribution of phenolic radicals provide a powerful new method of quantitative measure the stability of such radicals, which are often difficult to investigate experimentally and explain by chemical ... in principle be obtained by analysis of the 13C and 17O isotropic or anisotropic hyperfine couplings, but these have not been reported presumably because of difficulty of detection Without such...

Ngày tải lên: 22/07/2014, 06:20

... said problem In a study of organics adsorption on membrane, Kiso et al (2001) pointed out hydrophobicity of organic compounds was an important factor affecting adsorption of organics onto the membrane ... recharging of carbon beds and high operation cost As the available adsorption sites of the carbon are fully covered by the substances that are being adsorbed, the carbon will lose its ability for adsorption ... Rejection of Organics Fractions 71 4.2.1 Characteristics of the Secondary Effluent 71 4.2.2 Rejection of Organics Fractions by RO Process 73 4.2.3 Removal Efficiency of the RO...

Ngày tải lên: 16/09/2015, 15:23

... supercritical solvent phase With the addition of a small quantity of cosolvent, the solubility of these compounds in supercritical carbon dioxide was enhanced by several folds depending on the system ... of cholesterol at 318.15 K, 160 bar 73 Figure 5.3 Comparison of cholesterol solubility in SCF CO2 75 Figure 5.4 Determination of the sequence of polarity of cholesterol and its three esters by ... (obtained from 154 heating T profiles of Series A) 143 150 xx List of Figures Figure 7.18 Phase diagram of CBE-CBU binary mixture (obtained from 155 heating T profiles of Series B) Figure 7.19 X-ray...

Ngày tải lên: 17/09/2015, 17:19

... the efficiency Organics Organics TiO2 hν eh+ Adsorbent OH• OH- Organics Organics Organics O2- TiO2 O2 TiO TiO22 TiO2 TiO2 Organics Organics Figure 2.3 Schematic representation of TiO2 supported ... destruction of volatile organic compounds (VOCs) in gas phase In case of water purification, this technique offers several advantages such as the use of oxygen as the only oxidant, the capability of simultaneous ... improvement of photocatalytic activity by the effect of adsorbent support is reported in the following section The role of inert support (alumina and silica) on photocatalytic degradation of organic compounds...

Ngày tải lên: 28/11/2015, 13:45

... F Chemical Shifts of Sulfur Compounds ���������� 256 6.1.10 19F Chemical Shifts of Carbonyl and Thiocarbonyl Compounds ������������������������ 257 6.1.11 19F Chemical Shifts of Fluorinated Boron, ... Spectra of Solvents and Reference Compounds ������������ 5.14.1 1H NMR Spectra of Common Deuterated Solvents����� 5.14.2 1H NMR Spectra of Secondary Reference Compounds ��� 5.14.3 1H NMR Spectrum of ... Badertscher Structure Determination of Organic Compounds Tables of Spectral Data Fourth, Revised and Enlarged Edition 123 Prof Dr Ern¨o Pretsch ETH Z¨urich Institute of Biogeochemistry and Pollutant...

Ngày tải lên: 07/05/2016, 22:46

... amount of organic carbon was indicator as the amount of biofilm developed on PAC shows the amount of organic carbon on PAC after each incubation Figure Figure shows the adsorption isotherm of new ... effect of biofilm on the adsorption capacity of PAC, PAC covered with biofilm was made and its adsorption capacity was compared to the adsorption capacity of new PAC repeated times For biofilm ... objective of this study is to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of PACT process Materials and methods 2.1 Operation of powdered activated carbon...

Ngày tải lên: 05/09/2013, 08:40