Adsorption of aromatic organic acids onto high area activated

ADSORPTION OF pb AND cd ONTO METAL OXIDES

... 6.0 before autoclaving Pb and Cd speciation calculated by MINEQL for a total Pb/ Cd concentration of 1.0 mM b Measurement of Pb and Cd adsorption to natural bio®lms Pb and Cd adsorption isotherms ... isotherms, and Pb adsorption was almost an order of magnitude greater than that of Cd (Figs and 3) Extraction with NH2OHÁHCl and Na2S2O4 signi®cantly reduced both Pb and Cd adsorption, and adsorption ... acid and reducing the extraction time to 30 Fig Test for adsorption interference between Cd and Pb A Pb adsorption to bio®lms in the presence and absence of Cd B Cd adsorption in the presence and...

Adsorption of halogenated organic molecules and photo induced construction of a covalently bonded second organic layer on silicon surfaces

... ADSORPTION OF HALOGENATED ORGANIC MOLECULES AND PHOTO- INDUCED CONSTRUCTION OF A COVALENTLY BONDED SECOND ORGANIC LAYER ON SILICON SURFACES SHAO YANXIA (M.E., XI’AN JIAOTONG UNIVERSITY) A THESIS ... mechanism of unsaturated halogenated organic molecules on Si(100)-2×1 and Si(111)-7×7 surfaces On the basis of fundamental understanding of silicon surface chemistry of halogenated organic molecules, ... the molecules that are attached on silicon surfaces [2–4] The study of the direct and covalent attachment of organic molecules to Si surfaces has attracted a great deal of attention in past thirty...

Effects of novel purine analogs and the role of aromatic amino acids on MRP4 functions

... carboxylate group and cysteine's amino group (Adapted from Biochemistry, Chapter 24, The biosynthesis of Amino Acids) Glutathione conjugation is one of the systems in the detoxification of many anticancer ... affecting the structure of the plasma membrane, the cytosolic pH, and the rates and extent of intracellular transport of membrane (Simon and Schindlert 1994 ) There are several mechanisms of MDR The ... 4.4.2 Effects of oxopurine and azapurine compounds on 6TG resistance ……………………………………………………………… ……111 Discussion .112 5.1 Effects of purine analogs on MRP4- mediated transport of glutathione-conjugate...

Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge

... with incubation time In other word, the adsorption capacity of PAC increased with increase in the amount of organic carbon on PAC The adsorption capacity of PAC after 4th incubation was almost the ... of organic carbon on PAC after each incubation Figure Figure shows the adsorption isotherm of new PAC, PAC in the aeration tank, and PAC after 1st and 4th incubation The adsorption capacity of ... decrease the adsorption capacity of PAC for 3,5-DCP To clarify the effect of biofilm on the adsorption capacity of PAC, PAC covered with biofilm was made and its adsorption capacity was compared to the...

Tài liệu ADSORPTION OF ORGANIC COMPOUNDS doc

... 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 ... as ADSORPTION OF ORGANIC COMPOUNDS 13.17 FIGURE 13.12 Effect of biodegradation and the presence of nonadsorbable compounds on the shapes of breakthrough curves steam and CO2 at temperatures of...

Cadmium mobilisation and plant availability the impact of organic acids

... Conclusions Plant uptake of Cd from the Cd treatments with increasing concentration of organic acids seems to be the resultant of the interactions of Cd with organic ligands resulting in the formation of ... Prakash S and Srivastava M M 1999c Chromium mobilization and plant availability – the impact of organic complexation ligands Plant Soil 212, 203–208 Tifﬁn L O 1970 Translocation of iron citrate and ... more than 70% of supplied Cd was incorporated in roots of Zea mays and other plants Increasing concentrations of organic acids increased plant uptake of Cd, with a similar trend of distribution...

One dimensional organic nanostructures a novel approach based on the selective adsorption of organic molecules on silicon nanowires

... day after the evaporation of THAP on the surface exhibit the same random adsorption of the THAP molecules on the surface This suggests that even after a signiﬁcant amount of time for diffusion ... in the case of PQ adsorbed on Si(0 1) In summary, we presented here a novel approach to form 1D organic structures based on the adsorption of organic molecules on silicon nanowires We demonstrated ... to the adsorption on the SiNWs modiﬁed Ag(1 0) surface Two ﬁlled states STM images of the surface following the evaporation of Å of THAP are displayed in Fig 3a and b Each molecule appears as a...

Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution docx

... three subtropical forests in a region of South China under high air pollution, to investigate how deposited N is processed and examined the importance of DON in N budget The precipitation DIN input ... measurements but including also analysis of dissolved organic N (DON) input in bulk and wet-only precipitation 4138 BGD 4, 4135–4171, 2007 Input- output of N in subtropical forests under air pollution ... mixed and old-growth forests at DHSBR in southern China Input- output of N in subtropical forests under air pollution Y Fang et al 2004 DIN Total N leaching losses (surface runoﬀ plus leaching solution)...

Chemical evolution of volatile organic compounds in the outﬂow of the Mexico City Metropolitan area potx

... crossed over Mexico City and/or intercepted plumes downwind (northeast) of the city Flight (19 March, shown in green) will be discussed in the context of transport of the Mexico City plume Figure ... altitude upon return into the MCMA The higher mixing ratios of MTBE at the beginning and the end of the ﬂights were obtained during transects over the city In addition to the identiﬁcation with ... al.: Chemical evolution of volatile organic compounds (lower panel) shows the averaged mixing ratios for the top 20 VOCs obtained on the C130 during the over-ﬂights and the pie chart to the right...

Báo cáo khoa học: Charging of tRNA with non-natural amino acids at high pressure potx

... Aminoacylation of crude tRNA with Lys at high pressure was approximately 2.5 times higher Charging of tRNA with non-natural amino acids compared with the enzymatic reaction, which was due to misacylation ... [14C-aa]tRNAVal, were similar The yield of tRNA charging at high pressure with non-natural amino acids was between 2.5 and 9%, similar to data obtained for aminoacylation with natural amino acids ... Analysis of tRNAPhe and tRNAVal charging with a series of natural amino acids showed that the best yields were obtained for aromatic amino acids, but aminoacylation using amino acids with an aliphatic...

Báo cáo vật lý: "Immobilization of Dithizone onto Chitin Isolated from Prawn Seawater Shells (P. merguensis) and its Preliminary Study for the Adsorption of Cd(II) Ion" pdf

... onto Chitin 72 Free dithizone Chitin -dithizone Figure 3: IR spectra of (a) free dithizone and (b) dithizone- immobilized chitin The XRD spectra and their d-spacing data of free dithizone and dithizone- immobilized ... (ml), and m is the weight of the chitin or chitin -dithizone adsorbents The effect of adsorbent mass on the amount of adsorbed Cd(II) ion was investigated using the same procedure, but the weight of ... used for adsorption equilibrium experiments is provided for each pH used in the experiment Therefore the value of the adsorbed Cd(II) ions presented in Figure is purely from the adsorption of dithizone- immobilized...

Removal of Nutrients, Organic Matter and Heavy Metals from Paddy Field Drainage by Charcoal

... from farmland, water treatment equipment containing wood charcoal was devised to enable the charcoal to remove organic matter, nutrients and heavy metals in the drainage from a paddy field, and ... organic matter, nutrients, and heavy metals in a test paddy field was investigated The following results were obtained: (1) The TOC, TN, TP, Cr, Fe and Pb in the drainage from the paddy field were ... chemical property for charcoal and heavy metals in soil and water, and so on Since heavy metals are known to be transported in water combined with DOM, the removal of heavy metals linked with DOM needs...

Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment

... Biodegradability of zinc binding sites in DOM of WWTP effluent in river water Fig shows the variation of DOC, UV254 and SUVA during the incubation of DOM in WWTP effluent with river water, where river water ... out for river water and river water spiked with DOM from WWTP effluent to evaluate the biological alteration of zinc complexation characteristics of DOM under river water environment Zinc complexation ... hypothesized that, unlike binding sites in DOM of the river water, binding sites in DOM of WWTP effluents were less biodegradable In other words, treatment of wastewater by activated sludge process...

Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan

... degradation Accordingly, the influence of phosphorus concentration on the biodegradation of DOM was discussed in this research, because the phosphorus concentration in Lake Biwa has been decreasing ... DP was in the range of 0.006 to 0.007 mgP/L Effect of biodegradation activity change on DOM concentration in Lake Biwa Effect of biodegradation activity change on DOM concentration in Lake Biwa ... 2011 in phosphorus concentration is unable to be denied In this research, we evaluated the influence of phosphorus concentration on the biodegradation of DOM and discussed the possibility of pathway...

Investigation of thermal effect on exterior wall surface of building material at urban city area

... discussions 3.1 Analysis of existing exterior building based on different materials This part discusses the four locations of the monitored area with different types of exterior wall building materials: ... heat/solar radiation) of each material was calculated and analyzed (Figure 10) Figure 10 Normalized heat (total heat/solar radiation) using average heat of convection (qconv), heat of radiation (qrad) ... surroundings The aim of this study was to investigate the effect of construction materials that contributes to UHI and the thermal behavior of different materials used in surfaces of buildings Infrared...

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