chemical alteration of minerals in soils involves water gases acids etc
Crop uptake and extractability of cadmium in soils naturally high in metals at different ph levels
Ngày tải lên: 15/03/2014, 23:22
chemical equilibria and kinetics in soils
... sustain a myriad of interconnected chemical reactions, including those involving the soil biota The multiphase nature of soil derives from its being a porous material whose void spaces contain ... would be incorrect to interpret the reaction in Eq 1.3 as the combination of one CO2 molecule with a water molecule to form H' and HCO;- ions The error in this line of reasoning is brought into sharper ... equation is CHEMICAL EQUILffiRIUM AND KINETICS In k = 19 In A - E./RT (1.47) where In A is a constant of integration Common applications of the Arrhenius equation yield a graph of In k against liT,...
Ngày tải lên: 01/04/2014, 10:28
ecological aspects of viruses in soils
... capable of producing the toxin and increasing their virulence Equally compelling evidence of lysogenic conversion outside of the marine venue was provided in a recent study on the contribution of ... level of interest in pathogenic viruses in soils Many studies geared toward assessing potential hazards associated with land application of wastewater have yielded insights into virus-soil interactions ... critical information regarding the behavior of viruses in soils under a variety of conditions Factors influencing viral adsorption encompass characteristics of the soil solution, including ionic...
Ngày tải lên: 13/11/2014, 10:53
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 river water DOM Fig represents the variation of DOC, UV254 and SUVA during the river water incubation for weeks in the preliminary study During the first days of incubation, ... 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 ... shown in Fig and Table 1, Zn titration data obtained for DOM in the original river water sample seems to fit into two linear portions indicating two classes of binding sites In contrast, DOMs in...
Ngày tải lên: 05/09/2013, 10:15
Concentration and chemical speciations of cu, zn, pb and cr of urban soils in nanjing, china
... than the mean value of soils in China and the natural background value of soils in the Nanjing area The mean total Cr concentration is higher than the mean value of soils in China and the natural ... development of China, the percentage of population living in cities is increasing dramatically and, consequently, the environmental quality of urban soils are becoming more and more important in regards ... important soil types of Beijing and Nanjing areas Acta Pedol Sin 16, 319 – 328 (in Chinese, with English Abstr.) Thornton, I., 1991 Metal contamination of soils in urban areas In: Bullock, P., Gregory,...
Ngày tải lên: 15/03/2014, 23:22
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
... root water uptake is provided by water channels (aquaporins) in the cell-to-cell passage of water flow in roots [7, 45] Opening and closing of the channels could alter Lpr mainly when the water ... were investigated 2.5 In situ-measurement of root water absorption In the past few years, considerable progress has been made in measuring water flux in tree roots under in situ conditions in undisturbed ... than that of suberin (Fig 4) Relatively large amounts of lignin were found in spruce fine roots where the thinnest rootlets (< 0.5 mm) contained similar amounts of suberin and lignin (about 1.5 mmol...
Ngày tải lên: 08/08/2014, 01:21
DSpace at VNU: Levels and Chemical Forms of Heavy Metals in Soils from Red River Delta, Vietnam
... and Cu in the soils of F3 and U3 were strongly incorporated into the Fe oxides (FeO) and mineral structure (Res), resulting in low mobility of the two metals in these soils A low mobility of Cr ... LuchoConstantino et al 2005) Instead of strong adsorption by Fe oxides like in the forest field F3, Cr in the upland field U3 was more strongly incorporated in the crystalline lattice of minerals ... discharged into irrigation water channels, may be one of the main reasons for the high Zn contents in the surface soils of P10 and P21 N–P– K fertilizers, which often include traces of Zn, Cu,...
Ngày tải lên: 14/12/2017, 17:50
arsenic contamination in soils, water and plants
... to investigate the contaminant of arsenics in soils and plants compared to those in water The study areas were located not only within the interesting sub-catchment area that covering gold mine ... was determined to be control point or reference point at the area outside The locations of samplings were shown in Fig.6 Detailing of samplings are described as follows: • Plants sampling: Total ... locations had been taken in order to quantify the leveling of arsenic contaminant Five sampling locations are within the interesting sub-catchment area whose boundary covers gold mine and affected villages;...
Ngày tải lên: 25/04/2013, 08:21
CHEMICAL ANALYSIS OF WATER AND WASTEWATER
... Commonly Determined in Water Chemical species Significance in water Acidity Indicative of industrial pollution or acid mine drainage Titration Alkalinity Water treatment, buffering, algal productivity ... such toxins has been described.10 Summary of Water Analysis Procedures The main chemical parameters commonly determined in water are summarized in Table 24.4 In addition to these, a number of other ... performed in the field within minutes of sample collection Others, such as the determination of temperature, must be done on the body of water itself Within a few minutes after collection, water...
Ngày tải lên: 23/07/2013, 20:57
Inactivation of microorganisms in untreated water by a continuous flow system with supercritical CO2 bubbling
... method for inactivating microorganisms in drinking water In addition, we aim to investigate the effect of the SC-CO2 treatment with regard to structural damage and enzyme inactivation in E coli ... continuous flow treatment with SC-CO2 bubbling Measurement of surviving bacteria The coliform and total bacterial counts in the untreated water were determined using the method of Japan Water ... and suggested that inactivation of Escherichia coli in sterile distilled water and coliform bacteria in water prior to treatment at a municipal water filtering plant (untreated water) by the SC-CO2...
Ngày tải lên: 05/09/2013, 09:38
Determination of EDTA in Water Samples by SPE-Gas Chromatography/Mass Spectrometry
... added to 100 mL Milli-Q water and tap water at concentrations of 0.1 mg/L (1/5 of EDTA standard value in drinking water) and 0.01 mg/L (1/50 of EDTA standard value in drinking water) and subsequent ... Examination of Water Occurrence of EDTA in river water samples from three regions of Japan was examined EDTA was detected in ten of thirteen river water samples A high level of EDTA was observed in river ... concentration of EDTA (443 μg/L) was observed in a Table - Table – Recovery of EDTA fromtap water samples and tap water Recovery of EDTA from Milli-Q water and Milli-Q water Recovery of triplicate...
Ngày tải lên: 05/09/2013, 10:15
Different physical and chemical pretreatments of wheat straw for enhanced biobutanol production in simultaneous saccharification and fermentation
... Chumangalah Thirmal achieved a B.A.Sc degree in Chemical Engineering in 2007 from University of Waterloo Also received a M.A.Sc degree in Chemical Engineering in 2010 from Ryerson University Master's ... in Canada He has worked for several years in the health care industry, mainly in the field of developing and testing of novel wound dressing materials for chronic wounds He is currently a professor ... currently a professor in the Department of Chemical Engineering at Ryerson University in Canada His scientific research interests include the production of green energy and biofuels from renewable...
Ngày tải lên: 05/09/2013, 15:28
Tài liệu Committee on Toxicity of Chemicals in Food, Consumer Products and the Environment - Subgroup Report on the Lowermoor Water Pollution Incident pdf
... Vitamins and Minerals (EVM) • The commissioning of studies from outside contractors to increase our understanding of the water contamination incident and the passage of contaminants in the water ... macrophagic myofasciitis • further investigations of the bioavailability of aluminium in humans, including of the reasons for the reported interindividual variation C Future handling of similar incidents ... guidelines take the form of a maximum recommended concentration for a contaminant in drinking water In the case of acidity, the Guideline Value is a recommended range within which the pH of drinking...
Ngày tải lên: 17/02/2014, 10:20
Tài liệu WATER POLLUTION BY INSECTICIDES IN AN AGRICULTURAL RIVER .BASIN. I. OCCURRENCE OF INSECTICIDES IN RIVER AND TREATED MUNICIPAL WATER pdf
... prescncc of DDT, endrin, chlordane, dieldrin, diazinon, and parathion in carbon adsorption samples taken from other water sources The persistence of insecticides in soils will vary, in part, with the ... standpoint of total use in the basin, toxaphcnc, DDT, and BHC, in that order, would be the most probable contaminants This lcads to a consideration of the water solubility of these three insecticides ... Rainfall, stream turbidity, and insccticidc usage data were obtained to determint their influence on the quantities of insecticides recovcrcd from the samples Daily rainfall records were obtained...
Ngày tải lên: 18/02/2014, 04:20
Tài liệu Egypt''''s Water Warriors : Water Pollution in Egypt and the Role of NGOs in Reaching Integrated Management ppt
... properties of groundwater in Saint Katherine, South Sinai, Egypt and exploring the diversity, occurrence and distribution of fungal taxa in groundwater in South Sainai, samples of groundwater from ... exploring marine biodiversity, measuring turbidity of water and cleaning the beach Water Pollution in Port Said – A Case Study The current situation of fresh water canal in Port Said, as case of ... Association in St Kathrine, and an emerging Society15 for protection of environment and sustainability etc) and have been leading several initiatives aiming at raising public awareness, lobbying against...
Ngày tải lên: 18/02/2014, 04:20
Báo cáo "Assessment of climate change impacts on water resources in Hong-Thai Binh river basin " pdf
... year, occupying 15% -17% of water demand in the whole basin There are no differences between two Cases in terms of quantity and percentage of water deficit Trend of water shortage in Da, Thao, ... would influence on water balance in the basin The increase temperature causes increase in evaporation, while rainfall decreases in the dry season, therefore water demand is higher and higher, so water ... for water supply in the dry season for the Hong River Delta, 2007 (In Vietnamese) [4] Water Resources Planning Institute, The synthetic use of water resources in Hong – Thai Binh River, 2005 (In...
Ngày tải lên: 05/03/2014, 16:20
Chemical Composition of Vehicle-Related Volatile Organic Compound Emissions in Central California pdf
... apply in areas with serious ozone air pollution problems, use of oxygenates in gasoline is a firm requirement in most of the rest of California including Sacramento and the San Joaquin Valley In ... applications of CMB models have focused on understanding sources of VOC with respect to the ozone problem There is also increasing interest in using these models to expand knowledge regarding the role of ... Abundance of individual VOC in tunnel emissions for uphill vs downhill driving during summer 2001 17 with downhill driving and much lighter engine load Interestingly, the absolute concentrations of...
Ngày tải lên: 05/03/2014, 20:20
Báo cáo khoa học: NMR investigations of subunit c of the ATP synthase from Propionigenium modestum in chloroform/methanol/water (4 : 4 : 1) pot
... strong protein/protein contacts to assemble into rings of 10, 11 or 14 c subunits These rings can be extremely stable, and resist boiling in SDS for in the case of the undecameric c ring of P modestum ... depending manner (M Girvin, Biochemistry Department, Albert Einstein College of Medicine, New York, USA, personal communication) In chloroform/methanol /water (4 : : 1) the protein consisted of two ... subunit c in chloroform/ methanol /water (4 : : 1) exhibited no a helix interruption at the C-terminal part (T67, G68) of the protein Similar to the SDS sample, subunit c in chloroform/methanol/water...
Ngày tải lên: 08/03/2014, 10:20
CHEMICAL ANALYSIS OF ANTIBIOTIC RESIDUES IN FOOD pptx
... drugs includes lincomycin, clindamycin, and pirlimycin; two of these drugs—lincomycin and pirlimycin—are approved for use in food-producing species Lincosamides are derivatives of an amino acid ... used in pigs to treat joint infections and pneumonia Several combination products containing lincomycin are approved for use in food-producing species A lincomycin–spectinomycin product administered ... pirlimycin is an analog of clindamycin The lincosamides inhibit protein synthesis in susceptible bacteria by binding to the 50S subunits of bacterial ribosomes and inhibiting peptidyltransferases; interference...
Ngày tải lên: 11/03/2014, 03:20