photochemical modifications of dissolved organic nitrogen and dissolved organic phosphorus

... 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 ... deposition in warm and humid forests Here we report the concentrations and fluxes of dissolved inorganic (DIN) and organic N (DON) in precipitation, throughfall, surface runoff and soil solution ... Aitkenhead-Peterson, J A., Aber, J D., Merriam, J L., and Kaushal, S S.: Effects of chronic nitrogen amendment on dissolved organic matter and inorganic nitrogen in soil solution, Forest Ecol Manag.,...

Ngày tải lên: 23/03/2014, 00:20

... 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 ... adsorption of glucose and/ or DOM on PAC would be neglected and most of organic carbon on PAC would be originated from biofilm Therefore, it is concluded that the development of biofilm on PAC...

Ngày tải lên: 05/09/2013, 08:40

... the stabilisation and destabilisation of soil organic matter, and thus, in C dynamics and C pools of soils Sollins et al (1996) present a conceptual model of SOM stabilisation and destabilisation ... 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 ... 10, 215 – 221 Andersson, S., Nilsson, S.I., 2001 Influence of pH and temperature on microbial activity, substrate availability of soil-solution bacteria and leaching of dissolved organic carbon...

Ngày tải lên: 15/03/2014, 23:22

... 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 ... potential of fractional components of DOM in MBR3 at DOC concentration of mg/L .74 Table 5.1 Typical characteristics of influent municipal wastewater 86 Table 5.2 Mean values of XT and ST ... FOULING AND ACCUMULATION OF DISSOLVED ORGANIC MATTER IN MEMBRANE BIOREACTORS LIANG SHUANG (B Eng., Qingdao Technological University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY...

Ngày tải lên: 14/09/2015, 11:16

... complexation parameters Determination of dissolved and labile Zn, DOC, UV absorbance and SUVA Dissolved organic carbon concentration was measured as non-purgeable organic carbon with a TOC analyzer ... Characterization of isolated fractions of dissolved organic matter from natural waters and a wastewater effluent, Water Research, 35 (4), 985-996 Sarathy V and Allen H E (2005) Copper complexation by dissolved ... 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;...

Ngày tải lên: 05/09/2013, 10:15

... 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 ... evaluated the influence of phosphorus concentration on the biodegradation of DOM and discussed the possibility of pathway (4) to happen in the northern basin of Lake Biwa MATERIALS AND METHODS Materials ... of phosphorus and the treated secondary effluent much more enhanced the OC compared to single addition of phosphorus Accordingly, Fig - Relationship between OC and DP for the biodegradation of...

Ngày tải lên: 05/09/2013, 10:17

... 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 ... been published elsewhere (Hsu and Lo, 2000) for Cu, Mn, and Zn in compost extracts and for Cd and Cu in soils (Salam and Helmke, 1998) The increase in solubility of Cu and Pb could be due to the...

Ngày tải lên: 15/03/2014, 23:22

... - 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 ... 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 ... 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...

Ngày tải lên: 05/09/2013, 09:38

... activities and influent DO concentrations of the two reactors The maximum nitrogen conversion rate of each reactor at the influent DO of about 0.2 mg/L was set to an anammox activity value of 1.0, and ... Fig - The nitrogen loading rate and the conversion rates over time (a) Reactor (b) Reactor Nitrogen loading rate (closed triangles), nitrogen conversion rate of reactor (open circles), nitrogen ... conversion rate of about 2.9 kg-N/m3/d was maintained with influent ammonium and nitrite concentrations of about 160 and 190 mg-N/L, respectively When DO of mg/L was fed into the reactor, the nitrogen...

Ngày tải lên: 05/09/2013, 10:17

... II melt of Form II Form I to Form II melt of Form II loss of water melt of Form I Form I to Form II melt of Form II loss of water melt of Form III melt of Form VI loss of water melt of amorphous ... DSC of mixture of hydrates of Forms I, III, and IV (and possibly VI) (sample 59) Figure 34 DSC of mixture of hydrated Form I and possible unknown new form (sample 52) 116.6 mmol), 105 mL of water ... characterization of three polymorphic forms of acitretin,8 the study of a stable polymorph of paclitaxel,9 and the study of three polymorphs of sibenadet hydrochloride.10 DSC and XRPD have typically...

Ngày tải lên: 14/02/2014, 03:20

... (NGOs) like AME, and OFAI, producer organizations like VDAI, TOFA, VOFA, and Eco-farms, and certification bodies like Indocert, Ecocert, SKAL, and APOF besides various processors and traders In ... cent of total farming area was under organic production in the EU Some of the countries like Sweden and Austria had 15 per cent and 9.6 per cent of farms and 7.8 per cent and 8.4 per cent of all ... number and age of children and education are important variables in explaining consumer demand for organic products The place of purchase of food and habit persistence related to age and household...

Ngày tải lên: 14/02/2014, 08:20

... exchange of sulphur and nitrogen and their interaction in the marine atmosphere, in Interactions of C, N, P, and S Biogeochemical Cycles and Global Change, edited by R Wollast, F T Mackenzie, and ... amount of the variability in the organic aerosol, likely reflecting a common source, i.e., photochemical production of oxygenated VOCs and secondary organic aerosol The relationship between the organic ... accurately resolved Production and use of methyl chloroform, CFC 11 and CFC 113 has been banned since 1996 in developed countries under the Montreal Protocol Concentrations of of 16 D23S16 MILLET ET...

Ngày tải lên: 05/03/2014, 20:20

... g ao sn e sn of GM food with conventional and quality-enhanced products, mandates the labelling and traceability of GM products, and allows only a stringent adventitious presence of GM content ... products: conventional food, organic food, and GM food (in addition to a numéraire, which can be thought of as an aggregate of all other goods) In our demand framework, organic and conventional food ... sector and assume that a given endowment of land can be used to produce two outputs before GM innovation (conventional and organic products) and three outputs after GM innovation (conventional, organic, ...

Ngày tải lên: 05/03/2014, 20:20

... inability of MB and LPS to induce any impairment in mitochondrial function after h of treatment RCR and states 2, 3, and FCCP rates of MB- and LPStreated cells were the same as those of unstimulated ... mechanism of action of MDP on the mitochondrial bioenergetics system and since mitochondria are an important source of ROS production and especially of superoxide anion, we investigated the effect of ... MB, is capable of inducing mitochondrial proton leak in the spleen and liver of injected mice Moreover, it is of importance to note that the maximum in vivo effect of MDP and some of its derivatives...

Ngày tải lên: 05/03/2014, 23:20

... consisting of a ceramic particle filter, a fixed bed sorption for sour gas and alkaline removal, and a catalytic reactor for the decomposition of organic (if formed) and sulfur- and nitrogen- containing ... mix of or 1.5 g of a commercial Cu/ZnO/Al2O3 methanol catalyst and or 0.5 g of g-Al2O3 as a dehydration catalyst, with a grain size of ca 0.5 mm and a volume of ca ml Operating pressure and temperature ... thermal decomposition of biomass and the condensation of organic tar vapors and reaction water vapors take place in the course of one or few seconds High condensate yields of 45 to 75 wt.% are...

Ngày tải lên: 14/03/2014, 19:20

... Analysis of Municipal and Industrial Wastewater (January 2008) 2.28 US EPA Method 625: Base/Neutrals and Acids, 40 CFR 136 Appendix A, Method for Organic Chemical Analysis of Municipal and Industrial ... Determination of ammonium content using ASTM D 1426-98 or US EPA Method 300.7 5.3.4 Determination of ketones and alcohol content using NIOSH Method 1400 5.3.5 Analysis of reactive organic compounds and, ... Executive Officer will reanalyze the sample for confirmation 5.5 Initial Determination and Verification of Reactive Organic Compound Content The Executive Officer will determine the reactive organic...

Ngày tải lên: 14/03/2014, 20:20

... Adsorption of toxic chemicals in aqueous supernatant from Step 2)Chemical Oxidation or Total Mineralization of the the Organics 3)Deep UV Photooxidation of the Organics 4)Photocatalytic oxidation of ... in both dispersed and heterogeneous forms (supported) tsnl Advantanges of this Approach•The light absorption and energy levels of the semiconductor valence and conduction bands can be adjusted ... detector and compared to known amounts of the same chemical Organic Impurity Oxidized to CO 600 increasing time 400 200 organic impurity t=0 elution time (min) tsnl Optical Absorbance of Nanocluster...

Ngày tải lên: 14/03/2014, 20:20

... picture of the hydration mechanism of an enzyme, and shown it to be clearly dependent on the nature of the organic solvent and water content Experimental procedures Organic solvents force field The organic ... layer of 0.25 nm from the surface of the protein (Fig 3), and the ratio of Fig Average number of water molecules less than 0.25 nm away from the enzyme surface, for each organic solvent and water ... during the last ns of all trajectories for water contents of 25% and 60% All hydration events of all water molecules for a specific water content and organic solvent are collected and grouped in a...

Ngày tải lên: 16/03/2014, 10:20

... 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 ... databases The strength of the electrostatic interaction between S and C depends on the magnitude and relative orientation of the local fields of S and C and the dielectric properties and distances through ... (Independent of the property, C and S), and reaction center susceptibility, which rates the response of C to the effect in question (depends on the property, independent of S and R) The contributions of...

Ngày tải lên: 22/03/2014, 14:20

... incidence of hepatocellular adenomas and carcinomas in mice, tumours of the nasal cavity, liver subcutaneous tissues, mammary gland and peritoneal mesotheliomas in rats and tumours of the liver and ... Harderian gland, mammary gland, liver, kidney, skin, mesentery, forestomach and Zymbal gland In one study in rats, chloroprene caused increased incidences of tumours of the oral cavity, thyroid gland, ... catechol enhanced the incidence of papillomas of the tongue, carcinomas of the oesophagus, squamous-cell carcinomas of the forestomach and adenocarcinomas of the glandular stomach 5.4 Other relevant...

Ngày tải lên: 28/03/2014, 19:20