chemical composition of dissolved organic matter
Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
... 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) on adsorption capacity of PAC ... 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 ... 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...
Ngày tải lên: 05/09/2013, 08:40
Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
... press) Cheng T and Allen H E (2006) Comparison of zinc complexation properties of dissolved natural organic matter from different surface waters, Journal of Environmental Management, 80, 222-229 Ma ... 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 ... 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...
Ngày tải lên: 05/09/2013, 10:15
Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
... 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 that dissolved ... Behavior of organic matter in Lake Biwa, Annual Rep Lake Biwa Res Inst., 22, 161-170 (in Japanese) Hayakawa K and Takahashi M (2002) Behavior of dissolved organic matter in the northern basin of Lake ... Fractionation of dissolved organic carbon from the waters of Lake Biwa and its inflowing rivers, Jpn J Limnol., 59, 53-68 (in Japanese) Imai A (2002) Accumulation of recalcitrant dissolved organic matter...
Ngày tải lên: 05/09/2013, 10:17
Controls of bioavailability and biodegradability of dissolved organic matter in soils
... dynamics of dissolved organic matter in soils: a review Soil Sci 165, 277 – 304 Kalbitz, K., Schmerwitz, J., Schwesig, D., Matzner, E., 2003 Biodegradation of soil-derived dissolved organic matter ... cycling of high-molecular-weight dissolved organic matter in the ocean Nature 369, 549 – 552 Amon, R.M.W., Benner, R., 1996 Bacterial utilization of dissolved organic matter Limnol Oceanogr 41, 41 ... effect of assimilable organic carbon and biodegradable dissolved organic carbon Environ Sci Technol 35, 3442 – 3447 Fritze, H., Pennanen, T., Kitunen, V., 1998 Characterization of dissolved organic...
Ngày tải lên: 15/03/2014, 23:22
Correlation of the partitioning of dissolved organic matter fractions with the desorption of cd
... Hathhorn WE Enhanced mobility of Pb in the presence of dissolved natural organic matter J Contam Hydrol 1997; 29:59 – 80 Karlik B Liming effect on dissolved organic matter leaching Water Air Soil ... 2002) Dissolved natural organic matter has also been implicated in preventing the sorption of Pb onto a sandy soil (Jordan et al., 1997) Further analysis of the data reveal that the presence of ... Isolation and chemical characterization of dissolved and colloidal organic matter Chem Ecol 1993;8:135 – 51 Alberts JJ, Filip Z Metal binding in estuarine humic and fulvic acids: FTIR analysis of humic...
Ngày tải lên: 15/03/2014, 23:22
Fouling and accumulation of dissolved organic matter in membrane bioreactors
... 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 DEPARTMENT OF CIVIL ... CHARACTERISTICS AND BEHAVIORS OF DOM AT DIFFERENT SRTS .94 6.1 Overall Performance of MBR System 95 6.2 Concentration of DOM at different SRTs .97 6.3 Composition of DOM at different ... transport mechanisms of retarded convection and dispersion of DOM through a porous membrane can be a better explanation for DOM accumulation in MBR systems Keywords: Dissolved organic matter; Membrane...
Ngày tải lên: 14/09/2015, 11:16
Chemical Composition of Vehicle-Related Volatile Organic Compound Emissions in Central California pdf
... different VOC in the formation of secondary organic aerosol (Watson et al., 2001) The speciation of VOC emitted from motor vehicles reflects the chemical composition of the fuel consumed, with additional ... emissions and found that the composition of the emitted VOC was best described as a 50-50 mix of liquid gasoline and headspace vapor compositions The speciation of VOC emissions from on-road ... terms of relative composition are not very sensitive to ! temperature; it is the absolute vapor pressure of gasoline that depends strongly on T, much moreso than the relative composition of the...
Ngày tải lên: 05/03/2014, 20:20
Removal of Nutrients, Organic Matter and Heavy Metals from Paddy Field Drainage by Charcoal
... the portion of inlet and outlet and at the boundary of nylon nets bags with charcoal, and is adsorption when drainage water contacts the surface of charcoal because of the structure of this equipment ... Preparation of charcoal from Cryptomeria and Chamaecyparis and their properties Tanso, 160, 247–254 Kaschl A., Romheld V and Chen Y (2002) Cadmium Binding by Fractions of Dissolved Organic Matter ... Shiratani E., Yoshinaga I., Hitomi T., Hamada K and Takaki K (2007a) Characteristics of the adsorption of dissolved organic matter by charcoal carbonized at difference temperatures, Japanese Agricultural...
Ngày tải lên: 05/09/2013, 09:38
Tài liệu Báo cáo " Chemical composition of essential oil of Machilus Japonica Siebold & Zucc. (Lauraceae) from Vietnam " pptx
... discussion The essential oil was light yellow and the total yield of 1.23% The chemical composition of the leaf essential oils of investigated species collected in October 1991 and 2007 were not ... oil of investigated species from Vietnam was characterized by large amount of α- and βphellandrene (70.7%) and the ratio of αphellandrene and β-phellandrene was 5.73 Table The composition of leaf ... research from the Ministry of Science and Technology of Vietnam, code 50 63 06 References [1] N.X Dung, P.V Khien, Essential oils of wood, root, flower, and fruit of camphor tree, Pharmaceutical...
Ngày tải lên: 12/02/2014, 17:20
Báo cáo " Chemical composition of the leaf oil of Litsea glutinosa (Lour.) C. B. Rob. from Ha Tinh province " pptx
... Hela cell lines in vitro Chemical examination of the BuOH extract of the leaves and twigs of Litsea glutinosa collected from Xishuangbanna resulted in the isolation of two new aporphine alkaloids, ... [17] Tran Dinh Thang, Hoang Van Luu, Nguyen Xuan Dung, Chemical composition of the leaf oil of Canarium bengalense Roxb from Vietnam, Journal of Essential oil and Bearing Plants, 7(1) (2004) 43 ... Vietnamese Pharmacopoeia [11] The yield of the fresh leaf oil was 0.15% GC- About 15mg of oil, which was dried with anhydrous sodium sulfate, was dissolved in 1ml of n-hexane (for spectroscopy or chromatography)...
Ngày tải lên: 22/03/2014, 09:20
Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution docx
... influenced either by soil sources of DON (decomposition of litter and soil organic matter, plant exudates, fine-root and mycorrhizal turnover, and the waste products of macro and microorganisms), ... reported similar dissolved inorganic N (DIN) deposition in bulk precipitation in 2004 (Fang et al., 2007) Here we have continued these measurements but including also analysis of dissolved organic N ... our site Dissolved organic N input amounted to 17.8 kg N yr , accounting −1 for 36% of total dissolved N (TDN) input (47.6 kg N in 2005, Table 2) Annual −1 volume-weighted concentration of DON...
Ngày tải lên: 23/03/2014, 00:20
Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area potx
... individual and classes of VOC species This will be used to help understand the chemical transformation of air parcels as they are exported out of and downwind of the MCMA For organic compounds the ... averaged over the month of March 2006 Shown to the right of each bar graph is a breakdown, for T0 and T1, respectively, of all of the species measured in terms of the sums of the mixing ratios for ... 10, 2353–2376, 2010 2370 E C Apel et al.: Chemical evolution of volatile organic compounds Fig 14 Results of a MM model run to test of the sensitivity of the model to specific compounds The model...
Ngày tải lên: 28/03/2014, 20:20
chemistry of soil organic matter
... Adsorption of pesticides by organic matter- lay complexes Techniques used in pesticides -organic matter interaction studies , Chemical alteration and binding of pesticides ... soil organic matter Effects of management on soil organic matter 173 173 173 175 175 175 175 177 184 185 XI1 CONTENTS Effect of long term cropping Effect of ... distribution of organic sulfur in soil 275 Forms of organic sulfur 276 278 Amount and distribution of organic sulfur 279 Effect of soil forming...
Ngày tải lên: 30/05/2014, 22:57
Báo cáo lâm nghiệp: "Effects of the clear-cutting of a Douglas-fir plantation (Pseudotsuga menziesii F.) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps
... of organic anions The mean DOC concentration of 4.5 mg L1 required a charge of àmolc per mg of C, which is in agreement with the literature indicating values ranging from to 10 àmolc per mg of ... decit of the ionic balance can be related to the DOC, requiring a charge of organic carbon varying from to 10 àmolc per mg of C from forest-oor to 60 cm At 120 cm, the charge of C should be of 41 ... clear-cutting (vertical line) The decit of the ionic balance in anions was attributed to the presence of organic carbon (20 mg L1 ) requiring a mean charge of 6.5 àmolc per mg of C Anions in throughfall were...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Chemical composition of the periderm in relation to in situ water absorption rates of oak, beech and spruce fine roots" doc
... profile, i.e Of+ Oh horizons, is 72 mm) The organic profile is highly acidic with pH values of 3.0 and 2.6 (in KCl) and Ca2+/H+ quotients of 0.2 in the equilibrium soil solution of the upper (Of) and ... lowlands of NW Germany on Saalian melt water sands (115 m asl), this site is characterised by soil profiles (spodo-dystric cambisols) with thick organic layers (mean depth of the entire organic profile, ... laboratory studies on the relationship of radial hydraulic conductivity and the chemical composition of apoplastic transport barriers in plant roots in two ways: (a) chemical data are expressed in relation...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo toán học: "Anatomy and chemical composition of Pinus pinea L. bark" pdf
... bark chemical composition have been summarised [5] A description of P pinaster bark anatomy and chemical composition has recently been published [9] In this paper we describe the anatomy and chemical ... samples were taken at breast height For determination of the chemical composition, a composite sample prepared by mixing aliquots of the bark of each tree sampled The composite sample was milled ... The determination of tannin content used methylcellulose as absorbent: 10 mL extract were added to 10 mL of a 0.04 % solution of methylcellulose of high substitution degree, mL of a saturated ammonium...
Ngày tải lên: 08/08/2014, 14:21
phenanthrene sorption desorption by geosorbent role of soil organic matter and reactive mineral characteristics
Ngày tải lên: 14/11/2014, 06:07
Thành phần hóa học lắng đọng khí quyển ướt tại khu công nghiệp Thượng Đình, TP. Hà Nội = Chemical composition of wet Atmospheric precipitation in Thuong Dinh industrial area of Hanoi
... mdu nudc mua bdn tudgng (WO) Tai lieu tham khao P.M.Hoai, Chemical composition and acidity of atmospheric deposition in the northern part of Vietnam The thesis No EV97-34, AIT, Thailand P.H.Viet, ... Scientific Advisory Group meeting of Acid deposition Monitoring network in East Asia., March 2000 N.H Khanh, 2000, Air emission and the acidity of rain water of Hanoi city, Progress in Nuclear ... Suksomsankh, S.Simachaya, M Tabucanon and H Rodhe.1996 Regional background acidity and chemical composition of precipitation in Thailand, Atmosphere Environment Vol.30, 1589-1596 830 L.Granat,...
Ngày tải lên: 12/03/2015, 14:44
Kinetics of natural organic matter as the initiator, promoter and inhibitor in water ozonation and its influences on the removal of ibuprofen
... the variations of pH value in the end of experiments were within ± pH unit 0.1 2.4.3 The influences of NOM on the degradation of ibuprofen by ozonation In the experiments of ibuprofen degradation, ... NOM ON THE REMOVAL OF IBUPROFEN DURING WATER OZONATION 74 5.1 Modeling the influences of NOM on the degradation of ibuprofen by ozonation 74 5.2 Application of the model to other ... intercept of the plot of 1/Rct vs the external inhibition capacity, respectively The rate constant of NOM as the promoter can be determined from the slope of the plot of pseudo first-order ozone decomposition...
Ngày tải lên: 09/09/2015, 10:08