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Showing 1 to 20 of 34 for “"Cation Exchange Capacity (CEC)"”.
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Soil PH and clay content associated with chronic wasting disease in white-tailed deer in northern Illinois
… based on soil characteristics (soil texture, pH, cation exchange capacity, organic matter, and water content), then used the outcome to assess possible pathways by which soil characteristics increase the probability of transmission via environmental contamination. The model indicates CWD is likely …
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Synthesis of zeolites and their application as soil amendments to increase crop yield and potentially act as controlled release fertilizers.
… as soil amendments for plant growth, their cation exchange capacity (CEC) and slow-release fertilizer properties. Most work on slow-release fertilizers has focused on natural Clinoptilolite, Phillipsite and Chabazite. The aim of this study was to synthesize zeolites, study their …
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A study of the pH-dependent charge of a selection of highly weathered humic soils
… of which is believed partly to be a reduction in cation exchange capacity (CEC). At the same time the reduction in CEC would result in a decline in the soil's ability to retain cations. The reduction in CEC is said to result from the development of positive charge at low pH in soils with variable …
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Steric Effects of Alkyl Ammonium Salts on the Combustion of Exchanged Smectite Clays
… was explored as a new method for determining the cation exchange capacity (CEC) of clays. Smectite clays were modified with several alkyl ammonium salts varying in number of carbons and the spatial orientation of the carbons about the central nitrogen atom. The clays used, standards purchased from …
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The effect of soil parameters on the bioavailability and retention of lead in rats
… study investigated the relationship between soil cation exchange capacity (CEC) and soil amendments (lime and phosphate) to the retention of lead in soil fed to rats. This study also related the amount of lead that can be extracted from in situ contaminated soils from a secondary smelter site to …
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Soil quality in long-term corn and soybean rotations
… block design (RCBD), with three or four replications at six University of Illinois Crop Sciences research centers, at Urbana, Monmouth, Perry, Dixon Springs, DeKalb, and Brownstown, with all phases present each year. We measured soil bulk density (BD), water aggregate stability (WAS), cation …
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Laboratory characterization of a highly weathered old alluvium in San Juan, Puerto Rico
… fluorescence, and chemical analyses including cation exchange capacity (CEC), soil pH, and selective chemical dissolutions (SCD). Results show that the old alluvium contains: (1) two most weathering resistant primary minerals: quartz and orthoclase; (2) kaolinite and smectites as major clay …
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The effect of fast pyrolysis biochar made from poultry litter on soil properties and plant growth
… analyzed for bulk density (BD), water holding capacity (WHC), pH, cation exchange capacity (CEC), soluble salts (SS) and extractable nutrients. The field studies all used the rates of 0, 4.5, and 9 Mg ha-1 biochar and the rates were applied in the early spring of 2009 and 2010. Biochar was …
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Physical and Chemical Parameters of Common Soils in the Central Plateau Region of Haiti
… subsequent smallholder yields. Soils from four locations in the Central Plateau were assessed for organic matter in labile and non-labile fractions as well as for cation exchange capacity (CEC), total organic carbon (C) and N, pH, texture, and other characteristics. Results indicated that most of …
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The Effects of Iron Oxidation State on Surface Chemistry and Structure of Iron-Bearing Smectites: Cation Fixation and Selectivity, Structural Iron Environment, and Dissolution
… dehydroxylation, protonation, and site translocation of Fe(II) to alter the crystal structure. The structural changes, therefore, influence their surface properties such as layer charge, cation-exchange capacity (CEC), and cation fixation and selectivity. The objective of this study was to …
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Variability Structure Estimation: The Role of Sample Support
… within a small field plot. With these application examples, the relative information content of different measurement methods for characterizing the point variogram are evaluated (in terms of integral scale and sill). The effectiveness and robustness of the methodology are analyzed by means …
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Variability structure estimation: The role of sample support
… within a small field plot. With these application examples, the relative information content of different measurement methods for characterizing the point variogram are evaluated(in terms of integral scale and sill). The effectiveness and robustness of the methodology are analyzed by means …
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Evaluation of pre-taxonomy soil surveys
… Variability in all mapping units with respect to cation exchange capacity (CEC), base saturation, total sand, and clay content was primarily among sites within delineations. All mapping units were composed of more than one soil. Similar soils comprised major percentages of each mapping unit. The …
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Characterization of soft soil using multi-channel analysis of surface waves (MASW) and electrical resistivity method (ERM)
… the amount of clay fraction which was related to cation exchange capacity (CEC). As higher CEC results in higher conductivity. The relationship obtained between the 1-D Vs and 1-D resistivity value shows that consistent value of peat Vs was followed by the slight decrease in peat resistivity …
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SYNTHESIS AND CHARACTERIZATION OF MODEL AQUATIC PARTICULATES FOR USE IN SORPTION STUDIES
… oxides. Characterization included measurement of cation exchange capacity (CEC), and attempts to determine surface area and the pH of zero point of charge. Each of these methods was tested to determine their applicability to aquatic particulates, and attempts were made to improve the …
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Mineralogical Characterization of Uranium Ores, Blends and Resulting Leach Residues from Key Lake Pilot Plant, Saskatchewan, Canada
… and the degree of mineral liberation. Cation exchange capacity (CEC) analysis indicated an increase of the CEC values in the leach residues suggesting possible evolution of 2:1 layers into high-charge layers during the milling.
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An assessment of factors controlling the biodegradation of benzene in the subsurface environment
… contained soil phosphorus concentration and cation exchange capacity (CEC). For experiments prepared with an initial benzene concentration of 10 mg/L, the predictive equation contained soil copper, nitrate-N and phosphorus concentrations, CEC, and % sand. A comparison was made between benzene …
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Spectroscopy as a tool for the management of soil acidification
… in agricultural crops. While lime (CaCO3) application is an effective remedy for surface soil acidity, improved application and detection methods are required to manage acidity in subsurface layers. Testing the efficacy of acidity management through the soil profile at a high spatial resolution …
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Effect of peat solidification on macronutrients in soils associated with palm oil plantation in peat area
… of elements and nutrients on peat solidification of cement (OPC), fly ash and bottom ash. Lab scale physical model was set up in different conditions with combination of peat, rainwater, solidified peat and fertilizer to simulate the actual condition on site with different environmental …
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Forest fires and their effect on chemical and physical properties of soils in North-eastern-Libya. Assessment of the changes in soil chemical and physical properties of soils in North-eastern-Libya.
… and possibly lead to soil erosion and desertification. One of the most fire affected forest regions in the world is the Mediterranean. Libya, in the Mediterranean region, has soils that are considered to be arid except in a small area called Aljabal Alakhdar (Green mountain), which is the …
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