fluxes composition and fate of riverine organic matter
Controls of bioavailability and biodegradability of dissolved organic matter in soils
... uptake and degradation of organic matter by microorganisms, then DOM should play a key role in the stabilisation and destabilisation of soil organic matter, and thus, in C dynamics and C pools of ... effects of Al and Fe on citrate mineralisation only at molar ratios of at least 0.97 and suspect that this is likely due to precipitation of metal oxides and subsequent sorption of their organic ... model of SOM stabilisation and destabilisation for which they differentiate between three general sets of characteristics affecting the stability of organic matter: recalcitrance, interactions and...
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Occurrence and fate of semivolatile organic compounds (SVOCs) in the tropical atmosphere
... combination of laboratory experiments, field studies and theoretical models, has provided key insights into our understanding of the fate and distribution of SVOCs in the multi-media environment of SEA ... identified in the context of understanding the fate and transfer of SVOCs in SEA are summarized below: I Determination of atmospheric SVOCs by means of chemical analyses is often time-consuming due ... coefficient (KOW) is often regarded as a descriptor for the distribution of a chemical between organic phase and water The magnitude of KOW is a measure of the hydrophobicity of a chemical and can be calculated...
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Fouling and accumulation of dissolved organic matter in membrane bioreactors
... Values of kinetic and stoichiometric parameters 123 xi LIST OF FIGURES Figure 2.1 Overview of pressure-driven membrane processes commonly used in water and wastewater treatment and dimensions of ... treatment and a summary of the main findings with respect to the characteristics and fouling behaviors of DOM based on model compounds or natural organic matter Chapter describes the materials and ... 45 Table 3.2 Recovery rate of fractional DOM components 48 Table 3.3 Characteristics of GVHP and GVWP membranes 49 Table 3.4 Composition and concentration of synthetic wastewater 54...
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Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
... other dissolved organic matters (DOM) and biofilm attached onto PAC However, it is not clear that the effect of DOM and biofilm attached onto PAC were decrease in adsorption capacity of PAC in the ... The 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 ... concentration during and after the shock loading of 3,5-DCP onto PACT and control reactors - 252 - Journal of Water and Environment Technology, Vol.1, No.2, 2003 3.2 Effects of dissolved organic matter (DOM)...
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Removal of Nutrients, Organic Matter and Heavy Metals from Paddy Field Drainage by Charcoal
... - Variations of reduction rate for (a) TOC, TN and TP, (b) Cr, Fe, Pb, and Zn, and diurnal variations of contact times during field test Table - Mean and standard deviation (SD) of the concentration ... the - 13 - Journal of Water and Environment Technology, Vol 7, No 1, 2009 standard deviation (SD) in TP was larger than those of TOC and TN (Table 3) and the reduction rate of TP was distributed ... SD: Standard deviation, CV: Coefficient of variation - 12 - Journal of Water and Environment Technology, Vol 7, No 1, 2009 The water qualities of inflow water (IN) and outflow water (OUT) of the...
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Transport and fate of persistent toxic organic chemicals in aquatic ecosystems: the Niagara River to St Lawrence River Estuary example pptx
... sediments, are made up primarily of inorganic material and have an organic carbon content of only some % or less However, some of this organic content can be in the form of thin organic coatings on the ... sediments of lakes and impoundments are often major sinks and sites of eventual burial of PTOCs Distribution patterns of PTOCs in lake bottom sediments provide clues to sites of maximum loadings and ... sediment, and biotic material Better quantification of the role of these interfaces on the movement of PTOCs leads to a better ability to understand, model, and predict the aquatic fate of PTOCs...
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Effects of cattle and poultry manures on organic matter content and adsorption complex of a sandy soil under cassava cultivation (Manihot esculenta, Crantz) doc
... Total nitrogen (Nt) and organic nitrogen (Norg) were calculated as the sum of Kjeldahl-N and NO3 N and as the difference between Nt and the inorganic nitrogen (sum of NH4+-N and NO3-N), respectively ... manures which has three roles of organic matter sources, of protection of the soil against erosion and of increase in the activity of earthworms which reduce water runoff (Hole et al., 2005; Parfitt ... physical and chemical (carbon, nitrogen and organic matter content) properties Particles size distribution was measured after oxidation of the organic matter with hydrogen peroxide (H2O2) of a soil...
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Kinetics of natural organic matter as the initiator, promoter and inhibitor in water ozonation and its influences on the removal of ibuprofen
... ibuprofen = 0.5 µM, pCBA = 0.5 µM and phosphate buffer = mM 77 Figure 5.2 O3 and · OH exposures for ibuprofen in the presence of 0, 2.0 and 4.0 mg/L of SRFA after different reaction times of (a) ... designated time for a period of up to 30 for the measurements of ozone, pCBA and ibuprofen To stop further degradation of pCBA and ibuprofen, ozone was quenched with sodium thiosulfate (0.025 M) All experiments ... 80 Table 5.2 Influences of SRFA on the removal of selected pharmaceutical and organic compounds 83 ix LIST OF FIGURES Figure 1.1 Reactions of ozone with the presence of foreign compounds acting...
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Bơm ECD-V - P - Composition and Construction of ECD-V3 Pump System
... chamber of the injection pump with the pressure chamber, is a type of solenoid valve that turns ON/OFF (opens and closes) in accordance with the signals from the engine ECU When the coil of the ... 2 Operation of ECD-V3 Pump 2-1 Fuel Suction and Injection The mechanism for the suction and pumping/distribution of the fuel is basically the same as for the ... provide high levels of precision, quick response, and pressure resistance, as well as a large spill volume There are two types of solenoid spill valves: the pilot valve type, and the direct-acting...
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Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
... Interpretation of titration data with Scatchard linear transformation (a) oneligand case (b) two-ligand case; K1' and K2' represent the conditional stability constants of strong and weak ligand, respectively; ... community involved in the biodegradation of metal binding sites to further understand the fate of metal speciation in the water environment - 408 - Journal of Water and Environment Technology, Vol 8, ... Furumai H., Kasuga I and Kurisu F (2010) Comparison of Metal (Zn and Cu) Complexation Characteristics of DOM in Different Urban Wastewaters, Water Sci and Technol., (in press) Cheng T and Allen H E...
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Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
... Determinations of humic substances and other dissolved organic matter and their effects on the increase of COD in Lake Biwa, Anal Sci., 20, 159-164 Gurung T B and Urabe J (1999) Temporal and vertical ... reported that particulate organic matter did not affect CODMn, the possibility of accumulation of dissolved organic matter (DOM) is pointed out (Imai, 2002) On the other hand, Takahashi (1999) reported ... is also shown in Fig and the constants of the obtained regression lines and the coefficient of determination are summarized in Table The simultaneous addition of phosphorus and the treated secondary...
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Correlation of the partitioning of dissolved organic matter fractions with the desorption of cd
... affected by pH and solid and dissolved organic matter Environ Sci Technol 1997;31:1109 – 15 Temminghoff EJM, Zee SEATMVD, Haan FAMD Effects of dissolved organic matter on the mobility of copper in ... Mobility of cadmium-109 and zinc-65 in soil influenced by equilibration time, temperature and organic matter J Environ Qual 1999;28:1742 – 50 Andersson S, Nilsson SI, Saetre P Leaching of dissolved organic ... reduced the mobility of Cd caused by organic matter (Almas et al., 1999) Jordan et al (1997) examined the increased mobility of Pb in the presence of natural organic matter in a sandy soil They found...
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Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution docx
... Jiang, N H., and Zhang, L D.: Soil physical and chemical analysis and description of soil profiles, Standards Press of China, Beijing, 1996 Lohse, A L and Matson, P.: Consequences of nitrogen additions ... load and the N saturation of this natural − stand is the cause of the reduced growth A mean NO3 -N leaching for the two years −1 −1 of observation of 39 kg N yr imposed a strong acidification of ... leaching and throughfall DON input was only found in one of three forests (Fig 8b) This suggests that soil solution DON was influenced either by soil sources of DON (decomposition of litter and soil organic...
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Demographic composition and projections of car use in Austria ppt
... of variables: (1) age of household head, (2) age and sex of household head, (3) size of household, (4) number of adults and children in the household, and (5) age of household head and size of ... ProFamy Standard schedules The basic structure of the demographic accounting equation in ProFamy is as follows: number of persons of age x+1 with status i at time t+1 = (number of persons of ... Similarly, the number of births of parity and by single and cohabiting women, and of parity by divorced women are very small and we neglect these births for our projections The following standard schedules...
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chemistry of soil organic matter
... Nature and distribution of organic sulfur in soil 275 Forms of organic sulfur 276 278 Amount and distribution of organic sulfur 279 Effect of ... reactions between soil organic matter and pesticides are discussed, whereas Chapters and are concerned with the more practical aspects of soil organic matter The author of each chapter is an active ... complete review of the nature and distribution of N in organic matter, the reader is referred t o Bremner (1965, 1967), Flaig et al (1975) and to Chapter of this book THE ANALYSIS OF HUMIC SUBSTANCES...
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Design, synthesis and applications of Metal Organic Frameworks
... MOFs utilizing this family of ligands failed to yield any MOF We have successfully synthesized new MOFs utilizing 4-(imidazolyl) benzoic acid ligands: Cu MOF-3N, Cu MOF-4, Cu MOF-5 and Cd MOF-3 ... metal ions and organic ligands, it is possible to tailor the structures and sizes of pores within MOFs by design Because of the wide variety of coordination geometries offered by transition and lanthanide ... 9, the crystal structures of two Cd(II)-based MOFs (i.e., Cd MOF-1 and Cd MOF-2) and three Cu(II)-based MOFs (i.e., Cu MOF-1, Cu MOF-2 and Cu MOF-3) we have prepared all feature non-cubic frameworks...
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Báo cáo lâm nghiệp: "Short Communication Differences in the structure, species composition and diversity of primary and harvested forests on Changbai Mountain, Northeast China" ppsx
... the structure, composition or diversity of primary and logged forests The lack of knowledge regarding these quantitative characteristics of both primary and logged forests is one of the major problems ... genera and 13 families were identified Of the overall number of tree species, 21 were present on both the primary and logged forest sites: species of seedlings, 19 species of saplings, 15 species of ... Manokaran N (2003): Effect of selective logging on canopy and stand structure and tree species composition in a lowland dipterocarp forest in peninsular Malaysia Forest Ecology and Management, 175:...
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Báo cáo lâm nghiệp: " Dynamics of tree species composition and characteristics of available space utilization in the natural forest of the National Nature Reserve Hrončokovský Grúň" pot
... (125.92%) The low values of canopy closure at the breakdown stage in 1972 and 1982 were probably caused by dying-off of large beech and maple trees and by deceleration of breakdown during the ... falling of trees of the upper layer European beech as the bearer of the structure of this natural forest just starts to dominate from the aspect of yield and function at this stage Because of the ... difference between beech and fir In the case of fir, the processes of stem growth and increment are similar to those of beech The analysis of growth relationships between crown and trunk volume in...
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Báo cáo lâm nghiệp: "Variation in the composition and content of ellagitannins in the heartwood of European oaks (Quercus robur and Q petraea). A comparison of two French forests and variation with heartwood age" ppt
... concentration of ellagitannins at age a and oh T where a = This gives an estimate for b of -0.0219 with a standard error of 0.0007 and an R of 0.988 Therefore, if one knows the level of tannins ... Limousin region of France From each of these clear felled sites 20 randomly selected trees, of suitable quality for cooperage, were chosen During the splitting of logs and cutting of bolts, two ... samples of vescalagin, castalagin, grandinin and roburin A (kindly provided by Dr Scalbert, INRA, Paris) allowed confirmation of their identification and were used for calibration son Measurement of...
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