dissociation constants of organic bases in aqueous solution pdf

... most of the surfaces being still exposed, meaning that increasing the deposited Pt amount on TiO2 may not necessarily result in the increase of the photoactivity of TiO2 The deposition of silver ... APPLICATIONS IN PHOTOCATALYTIC DEGRADATION OF ORGANIC POLLUTANTS IN AQUEOUS SOLUTIONS HAN HUI (M Eng., Dalian Maritime University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... for MO dye in aqueous solutions 113 5.2.4 Modeling analysis of MO dye degradation kinetics 115 5.3.1 TiO2 film thickness of the prepared buoyant composite photocatalyst 117 5.3.2 Effect of film

Ngày tải lên: 10/09/2015, 15:50

... 10/03/2021 Ngày duyệt đăng: 20/08/2021 Title: Synthesis of Fe 3 O 4 @SiO 2 attached Fe 0 and its treatment of methyl blue in aqueous solution Từ khóa: Hạt nano Fe 3 O 4 @SiO 2 đính Fe 0 ... analyzed by Fourier transform infrared spectroscopy (FTIR) technique to determine the presence of functional groups and bonds in the molecule Surface morphology of as-synthesized Fe 3 O 4 @SiO ... treatment ability of methyl blue (MB) dyes in water with Fe 3 O 4 @SiO 2 attached Fe 0 particles The X-ray diffraction (XRD) technique was employed to characterize the structure of nanoparticles

Ngày tải lên: 23/06/2024, 15:09

... a period of 7 days in 100 ml, pH 5 aqueous solutions containing various concentrations of the studied inhibitors The mass of the specimens before and after immersion was determined using an analytical ... corrosion inhibitors for metals in acid cleaning processes This study was done to evaluate the inhibitive effect of ethyl acetate extract of U gambir as a green corrosion inhibitor of mild steel in aqueous ... Sciences, Universiti Sains Malaysia, 11800 USM Pulau Pinang, Malaysia *Corresponding author: mhh.km08@student.usm.my Abstract: The inhibition of the corrosion of mild steel in aqueous solutions by ethyl

Ngày tải lên: 07/08/2014, 14:20

... (cm-2) plotted against the total concentration of zinc ions in the precursor solution The inset shows the corresponding initial degree of supersaturation of zinc in the precursor solution at the ... the growth of ZnO nanorods and films in aqueous solution using zinc acetate and ammonium hydroxide in detail Regardless of the type of substrate used, the solubility of zinc (SZn), interface properties ... Firstly, the intrinsic doping concentrations in undoped ZnO single crystals is about five orders of magnitude less than those in polycrystalline ZnO This large difference of intrinsic doping concentrations

Ngày tải lên: 14/09/2015, 08:26

... intake of food and drinking water, food being the most important source in most populations Long-term exposure to arsenic in drinking-water is mainly related to increased risks of skin cancer, but ... brain and bone Trang 19damage In Thai Nguyen province of Vietnam, people living around Pb-Zn mining areas occurred some sign of heavy metal poisoning even cancer disease.And in a lead recycling ... been found in many countries around the world In the mining areas located in the districts of Jajpur, Keonjhar, Mayurbhanj and Sundargarh districts of Odisha in India, nearly 45% to 67% of iron

Ngày tải lên: 05/06/2018, 14:37

... proteins is to further advance in the understanding of the possible mecha-nism of action of these compounds, which will provide us with information in order to guide an intelligent development of ... calorimetric signals were integrated to obtain the corre-sponding heats associated with each addition of the Casi-opeína solution into the matching aqueous media with the Origin 7.0 (OriginLab Corporation, ... 1RESEARCH ARTICLEInvestigation on the self‑association of an inorganic coordination compound with biological activity (Casiopeína III‑ia) in aqueous solution Alejandro Marín‑Medina1, Juan Carlos

Ngày tải lên: 29/05/2020, 14:32

... hydrolysis pH of 8, a larger amount of perfect TiO2 crystals was A - anatase C - CNTs A A A A pH of 11 pH of 10 pH of 9 pH of 8 pH of 7 pH of 6 pH of 5 pH of 4 pH of 3 2 theta - Scale pH of 2 A C ... catalyst dosage In aqueous solution, MB is in form of cation (C16H18N3S+)[29], pH of solution therefore influences the gathering of MB cations to catalyst surface The higher amount of MB cations concentrated ... composition of material The XRD patterns shown in figure 2 illustrate the crystalline phase of the obtained composite in the range of 2 from 10o to 70o The well-defined sharp diffraction peaks indicate

Ngày tải lên: 28/06/2021, 08:48

... simultaneously following excitation of 7dza at 267nm in aqueous solution Using a linear combination of two Gaussian functions to model the absorptivity spectrum of 7dza in the spectral region ... and 7dza during TAS experiments The homogeneity of the solutions in a 2 mm path length fused silica cell was maintained by continuous stirring with a Teflon-coated magnetic stirbar To minimize the ... al.43 reported two lifetimes of 0.13 and 0.45 ps for adenosine in aqueous solution, whereas Pecourt et al.44 reported a single lifetime of (0.29 ± 0.04) ps for adenosine in the same solvent It is

Ngày tải lên: 04/11/2022, 07:36

... as a result of swelling of the cross-linked vesicles when diluted in methanol Substantial swelling was observed for the lightly cross-linked vesicles in the presence of methanol In contrast, ... targeting a DP of 120 for the core-forming block con firmed that ∼99% conversion was obtained within 90 min (see Figure 3 a) DAAM conversions were determined by comparison of the residual vinyl ... S5 ) The e ffect of varying the ADH concentration on the extent of cross-linking (and hence degree of covalent stabilization of the nano-objects) was studied using DLS. Accordingly, ADH was added

Ngày tải lên: 04/12/2022, 16:06

... determine the rate of biodegradation of specific contaminants in groundwater during a fieldstudy Mass flux of the studied contaminant through a line/cluster of wells (a transect) is recorded instead ... a denominator in the first-order rate equation would result in an “infinite” value If the concentration reached a value other than zero but leveled off at that pointfor the remainder of the experiment, ... describe the kinetics of biodegradation loss in natural systems has been criticized Bekins et al (1998) suggest that theautomatic use of first-order kinetics without first determining whether the

Ngày tải lên: 28/03/2014, 19:20

... activity The incorporation of logging residues into the mineral soil implied higher rates of soil biological processes, which resulted in increased organic matter decomposi-tion and in changes of N dynamics ... harvesting and site preparation is an important factor influencing the growth of tree seedlings Mineralization and immobiliza-tion of organic N during decomposiimmobiliza-tion are key processes in ... tree harvesting with removal of logging residues and forest floor, b) mechanical incorporation of logging residues and forest floor into the upper 20 cm of the mineral soil, and c) logging residues

Ngày tải lên: 08/08/2014, 14:21

... sources of organic matter ……… 61 3.10 Discrimination of sewage contaminated sediments from uncontaminated sediments using the plot of %Corg versus C/N 3.11 Crossplot of δ15N versus δ13Corg of sediments ... sewage has been disposed into the Harbour Release of methane from harbour sediments during dredging activities instigated interest in studying the sources of methane trapped in Victoria Harbour sediments ... interest in that the Holocene unit of the continental shelf in the Hong Kong SAR has been proposed to be a net carbon inner-sink (Yim et al., 2002) Continental margins, especially in regions in close

Ngày tải lên: 14/11/2014, 07:29

... solids particles, instead of existing in aqueous phase, which would influence their distributions in wastewater In comparison, BPA has a relatively high solubility in aqueous solution Henry constant ... respectively According to the adsorption isotherms for E1, E2, EE2 and BPA, a physical adsorption model containing three types of binding sites, namely, specific binding site, semi-specific binding site ... non-specific binding site was proposed to interpret the adsorption performance of MIP The adsorption mechanisms were interpreted by a physical adsorption model in terms of binding affinity The adsorption

Ngày tải lên: 11/09/2015, 10:15

... DEGRADATION OF ORGANIC POLLUTANTS IN WASTEWATER ZHOU JINKAI (M.Eng, BICT) A THESIS SUBMITTED FOR THE DEGREE OF PhD OF ENGINEERING DEPARTMENT OF CHEMICAL AND BIOMOLECULAR ENGINEERING NATIONAL ... committee, for offering suggestions and comments I would like to express my sincerest appreciation to the Department of Chemical and Biomolecular Engineering for offering me the chance of studying at ... co-axial cylinders When the inner cylinder is rotated at a certain speed, the unsteady flow within the annulus allows the fluids to recirculate from the vicinity of the rotating inner cylindrical

Ngày tải lên: 14/09/2015, 12:35

... of bed height on the removal of Rhodamine B in fixed bed Fig 10 Effect of flow rate on the removal of Rhodamine B in fixed bed Fig 11 Effect of initial concentration on the removal of Rhodamine ... to the environment In industrial processes, approximately 10 – 15% dyes are wasted in effluents during dying processes3 Discharging of wastewater containing dye compounds into water sources has ... groups on the surface of biosorbents and also influences the availability of dye molecules In order to examine the effect of initial pH value on decolorization of Rhodamine B solution, dye adsorption

Ngày tải lên: 26/09/2015, 11:07

... TRACKING IN AQUEOUS SOLUTION NANDHINI ELAYAPERUMAL NATIONAL UNIVERSITY OF SINGAPORE 2010 Trang 2NANOPARTICLE TRACKING IN AQUEOUS SOLUTION NANDHINI ELAYAPERUMAL (M.Tech, ANNAMALAI UNIVERSITY, INDIA) ... however, was in agreement with the measurement obtained from dynamic light scattering This indicates that (i) particle-tracking is a promising tool in determining the behaviour of particles in solution, ... Prof Chen Shing Bor for kindly teaching me basic chemical engineering concepts and calculations I am indebted to all the lab members for their discussion shared during the times of group meetings,

Ngày tải lên: 16/10/2015, 12:00

... determined the amount of inorganic lead in estuaries sediments in the UK ranged from 25 μg.g-1 in non-contaminated areas to over 2700 μg.g-1 in estuary Gannel where get the waste from the mining of ... 52.6 Overview of handling heavy metals in aqueous solution using Titanatenanotube / reduced graphene oxide composite 20 2.6.1 Scientific Basis of handling heavy metals in aqueous solution by ... pollution in the world and Vietnam 2.2.1 In estuary, coastal and marine areas Metal pollution in the marine environment has increased in recent years due to increasing global population and industrial

Ngày tải lên: 12/10/2016, 10:22

... the pH of the solution that influences the properties of the surface active sites and ozone decomposition reactions in aqueous solutions. Knowledge of alumina interaction with organicyinorganic ... hydroxide and inorganic ions into consideration. The process of d-alumina dissolution in the presence of 8-hydroxyquinoline-5-sulfonate (HQS) and salicylate in the pH range: 3–9 was examined. The ... dissolution rate of metal oxides strongly depends on the pH of aqueous solution, typi- cally increases at both acidic pH, below the pH of zero point of charge of metal oxide and in the alkaline...

Ngày tải lên: 15/03/2014, 23:22

... challenge occurring organic and inorganic compounds, but of evaluating potential effects associated with an activity also containing trace levels of synthetic organic com- and determining whether ... assess- The intent of introducing this approach is to encour- ment model for trace organics in soil: III. Application of screening model. J. Environ. Qual. 13:573–579.age all involved in sustainable ... significant factor affecting the USEPA’s interpretation of the results. Exposure point concentration distributions were de- ORGANIC CHEMICALS AND termined using source partition modeling of constituent SIMPLIFIED...

Ngày tải lên: 14/02/2014, 03:20

... standardized discriminant functions to analyze the resulting data. There is evidence of growing interest in organic products in the province, with a sizeable proportion of respondents having consumed ... appeal 26 of organic products. It is also important that government finds ways of integrating organic foods issues into the on-going agricultural restructuring process by providing the basic ... growing importance of organic products in the food system of the Eastern Cape Province which warrants a systematic investigation into consumer preferences and buying behaviour. Factors influencing...

Ngày tải lên: 14/02/2014, 03:20