• Accurate and precise determination of 90Sr at femtogram

    2019 11 11 The 90 Sr is an artificial isotope of strontium Sr whereas natural Sr comprises of four stable isotopes such as 84 Sr 86 Sr 87 Sr and 88 Sr 88

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  • A performance comparison of commercially available

    2015 11 30 Extraction chromatographic separations following a nuclear event will require both speed and accuracy Ideally these separations will be carried out using commercially available products Because 90Sr is a likely material to be used in a radioactivity dispersal device commercially available products for the separation of strontium were tested to evaluate differences in their elution profiles

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  • KGS Bull

    2008 1 3 The Geological Survey has published the results of one investigation Nixon Runnels and Kulstad 1950 on a source of silica sand The present study was undertaken to determine if common river sands which are available in very large tonnages could be utilized as a source for feldspar and silica sand Preliminary examination has indicated

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  • UM1

    2020 4 2 strontium exhibited strong nonlinearity and it was well described by the use of the Freundlich equation The sorption of cadmium was greater than nickel and strontium Electrostatic sorption was major contributor to the sorption of these metals The breakthrough curves of cadmium nickel and strontium were asymmetrical and had significant tailing

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  • The Table of Standard Atomic Weights an exercise in

    2020 6 19 Abstract The present Table of Standard Atomic Weights TSAW of the elements is perhaps one of the most familiar datasets in science Unlike most parameters in physical science whose values and uncertainties are evaluated using the Guidelines for Uncertainty in Measurement GUM the majority of standard atomic weight values and their uncertainties are consensus values not GUM

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  • MINERALOGY

    2013 9 23 tailing wat r slurries from the processing of copper nickel ores will likely contain on the order of 10 12 to 10 13 mineral fibers/liter of water of which some 20 30 or more may be amphibole This represents 109 to 10 10 fibers per 3

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  • Characterization of Rare Earth Elements used for

    2020 10 27 Table 2 Similar solutions were prepared to test the extraction chromatography based chemical separation procedures Table 2 Pairs of natural REE matrix elements and trace REE analytes used for preparation of calibration standard sets to test resolution of adjacent mass interferences Bulk REE Matrix Isotopic abundance Trace REE Analyte

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  • Studies of Properties and Composition of Loparite Ore Mill

    2021 10 8 Abstract The authors study the engineering geological characteristics and material constitution of loparite ore mill tailings in the active disposal area and in the dump decommissioned more than 30 years ago The material constitutions and the contents of valuable components are nonunform in the test tailings The content of light rare earth elements in fine fraction –0 071 mm is 1 5–2

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  • Effect of desorption kinetics on colloid‐facilitated

    Strontium which was injected a concentration 10 times greater than that of cesium broke through the column about twice as rapidly as cesium at the low ionic strength Unlike cesium the increase in ionic strength increased the desorption tailing of the strontium

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  • Removal of Lead from Contaminated Water

    2020 10 13 strontium and zinc However there is a limit beyond which it can be damaging to the organism Non essential heavy metals that are harmful to living organisms and have been encountered in both underground water and surface water systems are cadmium chromium mercury lead arsenic and antimony U S EPA 1996

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  • Peak Finding and Measurement

    2021 9 4 A related function is findpeaksSGw m which is similar to the above except that is uses wavelet denoising instead of regular smoothing It takes the wavelet level rather than the smooth width as an input argument The script TestPrecisionFindpeaksSGvsW m compares the precision and accuracy for peak position and height measurement for both the findpeaksSG m and findpeaksSGw m functions finding

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  • The Determination of 30 Elements in Geological

    2011 1 9 Table 1 Table 1 Elements analyzed and the lower limits of determination LLD for elemental analysis of geological samples Element Vanadium V Chromium Cr Nickel Ni Copper Cu Zinc Zn Gallium Ga Germanium Ge Arsenic As Selenium Se Bromine Br LLD 5 ppm 3 ppm 2 ppm 2 ppm 2 ppm 2 ppm 2 ppm 2 ppm 1 ppm 1 ppm Element Rubidium Rb Strontium

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  • What is Industrial Wastewater Where Does it Come From

    Industrial Laundries The commercial textile services industry processes some 15 billion pounds of laundry per year and the wastewater generated from such uniforms towels floor mats and the like is filled with oil and grease lint sand grit heavy metals and VOCs that must be treated before it

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  • MiR 9 5p miR 675 5p and miR 138 5p Damages the

    2016 2 15 2 1 Strontium Altered the Expression Levels of miRNAs in Vitro and in Vivo MC3T3 E1 cells 4 10 5 cells/well in the six well plates were treated with strontium ranelate six hours after seeding We detected the miRNAs that were related to bone formation according to previous studies 12 13 14 15 16 17 18 Results showed the down regulation of miR 9 5p upon strontium ranelate

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  • A hydrated barium strontium pyrochlore in a biotite

    2009 2 21 A hydrated barium strontium pyrochlore with only subordinate amounts of Ca and Na has been found in a weathered biotite rock contact rock of a carbonatite from Panda Hill Tanganyika as small euhedral yellowish grey cubic crystals showing the combination of the octahedron and the cube in a rock and several tailing com

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  • Effect of water content on strontium retardation factor

    2013 9 19 Radioactive strontium 90 The chloride breakthrough curves BTCs displayed an earlier initial breakthrough and a longer tailing as the average water content decreased Furthermore the researchers observed that at lower water contents the medium had a greater fraction of immobile water higher dispersion and slower mass transfer between

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  • Heavy Metal Contamination of Groundwater and

    2016 1 6 revealed that most tailing particles were very fine with particle sizes between 0 075 mm and 0 002 mm The metal contents in the tailing samples were analyzed according to the EPA Method 3051 16 A tailing sample of 0 5 g was transferred into a fluorocarbon microwave digestion vessel with 10 mL nitric acid and digested for 10 minutes The sample

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  • Co‐occurrence of antibiotic biocide and heavy metal

    2021 7 23 pling sites are provided in Table 1 Pairwise compar isons varied depending on the type of heavy metal however generally metals such as Strontium Ash Basins up to 176 27 mg kg 1 40 43 49 24 mg kg 1 Tim s Branch up to 37 90 mg kg 25 051 13 10 mg kg 1 and Cobalt Ash Basins up to 18 17 mg kg 1 4 53 5 10 mg kg 1 Tim s Branch up to

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  • Measurement of strontium isotope ratios by MC ICP MS

    Measurement of strontium isotope ratios by MC ICP MS after on line Rb–Sr ion chromatography separation Silvia García Ruiz Mariella Moldovan and J Ignacio García Alonso Department of Physical and Analytical Chemistry University of Oviedo Julián Clavería 8 33006 Oviedo Spain E mail jiga uniovi Fax 34 Tel 34

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  • Effect of water content on strontium retardation factor

    2019 5 26 Effect of water content on strontium retardation factor and distribution coefficient in Chinese loess 793 Kd is also an important parameter in modelling transport and environmental impact of radionuclides in the subsurface especially for highly sorptive chemicals like Sr Kaplan et al

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  • Switching the fracture toughness of single crystal ZnS

    2021 4 16 The dislocations near the surface region are visualized by the white tailing features based on which the dislocation density under different light conditions is estimated showing no significant difference Table S1 in the supplementary material showing a line density of about 2 10 6 /m for all cases in Fig 3 as also confirmed by the

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  • Effect of water content on strontium retardation factor

    2013 9 19 Radioactive strontium 90 The chloride breakthrough curves BTCs displayed an earlier initial breakthrough and a longer tailing as the average water content decreased Furthermore the researchers observed that at lower water contents the medium had a greater fraction of immobile water higher dispersion and slower mass transfer between

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  • Data analysis of heavy metal content in riverwater

    2021 1 18 The purpose of this paper is to use multivariate statistical methods with asymmetric distributions approach chemical analysis and inductively coupled plasma–mass spectrometry ICP MS device We investigate data of heavy metal content from Akcay Riverwater to the Mediterranean involving Finike sea coast at Turkey We determine the chemical content origin of heavy metals of the surface

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  • Assays and Geochemical Analysis

    Assays and Geochemical Analysis A chemical analysis that determines the proportion of metallic Cu Pb Zn Au Ag etc or non metallic Fl S P etc elements in a sample is commonly referred to as an assay A wide variety of geological materials can be chemically analyzed these include water vegetation soil sediment and rock

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  • What is Industrial Wastewater Where Does it Come From

    Industrial Laundries The commercial textile services industry processes some 15 billion pounds of laundry per year and the wastewater generated from such uniforms towels floor mats and the like is filled with oil and grease lint sand grit heavy metals and VOCs that must be treated before it

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  • Waste Disposal

    2012 12 16 Description of Problem Improper waste disposal is often the largest of mine and refinery pollution Waste is generally categorized into two different types tailings and waste rock stockpiles Tailings have the most damage potential because they tend to be composed of smaller finely milled particles whereas waste rock stockpiles are made up

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  • Impact of mine water disposal on concentration of

    Barium and strontium in waters and sediments of the Odra 115 Table I Statistical parameters of Ba Sr Ca and Mg in sediments of the Odra River organic matter lacustrine sediments as well as alluviaof rivers in peaty areas I Bojakowska G Sokolowska 1996 Very high concentrations up to 2435 ppm are a

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  • Exploration of Solute Transport Behavior at the Shale

    1 5 2− and revealed that solutes were transported within only 30 40 of the total pore space MIM modeling results also suggested that immobile porosity is a combination of soil

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  • GAMMA SPECTROSCOPY

    2011 6 1 Radionuclides that do not emit gamma rays or do so in a very small percentage of thei r decays e g H 3 C 14 P 32 Sr 90 Pu 239 cannot be identified or quantified

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  • List Table of Specific Gravity of Minerals

    2015 6 19 Source 1 Table of materials reported by Fred Bond Source 2 Outokumpu The science of comminution Source 3 Equipment and pipelines Source 4 Tenova Bateman mills AG/SAG Rod Ball Mills Source 5 Doering international cylpebs Source 6 SME handbook of mineral processing N L Weiss Editor NY 1985

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  • Solute Transport in Soils and Vadose Materials Soil

    Solute Transport in Soils and Vadose Materials Much of the recent interest in vadose zone processes has come out of the need to predict the movement of contaminants to aquifers Contaminants have diverse sources chemistries and time evolutions of deposition in soils all of which effect their fate Spills can be rapid or slow from points of

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  • miR 9 5p miR 675 5p and miR 138 5p Damages the

    2 1 Strontium Altered the Expression Levels of miRNAs in Vitro and in Vivo MC3T3 E1 cells 4 10 5 cells/well in the six well plates were treated with strontium ranelate six hours after seeding We detected the miRNAs that were related to bone formation according to previous studies 12 13 14 15 16 17 18 Results showed the down regulation of miR 9 5p upon strontium ranelate

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  • Abstract Ralstonia solanacearum is a kind of soil borne bacteria destructive to agricultural crops As it is extensively distributed in the tropical subtropical and temperate zones it seriously threatens food safety of the world In the world a large number of scientists

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  • Solute Transport in Soils and Vadose Materials Soil

    Plug Flow Transport Following example III 12 of Mills et al 1985 Consider a spill of 50 000 g/ha of naphthalene which is leaching from an abandoned waste disposal site in a sandy loam soil with bulk density of 1 5 g/cm 3 field capacity θ f = 0 22 cm 3 /cm 3 water table at 1 5 meters and mean annual percolation of 40 cm Using first order sorption and degradation we find a partition

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  • A hydrated barium strontium pyrochlore in a biotite

    2009 2 21 A hydrated barium strontium pyrochlore with only subordinate amounts of Ca and Na has been found in a weathered biotite rock contact rock of a carbonatite from Panda Hill Tanganyika as small euhedral yellowish grey cubic crystals showing the combination of the octahedron and the cube in a rock and several tailing com

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  • Formations of calcium carbonate minerals by bacteria and

    2016 3 1 Biomineralization is a naturally occurring process in living organisms In this review we discuss microbially induced calcium carbonate precipitation MICP in detail In the MICP process urease plays a major role in urea hydrolysis by a wide variety of microorganisms capable of producing high levels of urease We also elaborate on the different polymorphs and the role of calcium in the

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  • The Determination of 30 Elements in Geological

    2011 1 9 Table 1 Table 1 Elements analyzed and the lower limits of determination LLD for elemental analysis of geological samples Element Vanadium V Chromium Cr Nickel Ni Copper Cu Zinc Zn Gallium Ga Germanium Ge Arsenic As Selenium Se Bromine Br LLD 5 ppm 3 ppm 2 ppm 2 ppm 2 ppm 2 ppm 2 ppm 2 ppm 1 ppm 1 ppm Element Rubidium Rb Strontium

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  • R

    2011 10 5 white area in the lower central part is the tailing pile of the Tom Reed nlill 26 7 TheElephant sTooth a rhyolitic plug to the east of Oatman 47 8 Ageneral view of the southwestern part of the Oatman Dis­ trict The Boundary Cone a volcanic plug may be seen in the lower picture 48 9 Viewshowing the structure of the Gold Road vein with nearly

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  • List Table of Specific Gravity of Minerals

    2015 6 19 Source 1 Table of materials reported by Fred Bond Source 2 Outokumpu The science of comminution Source 3 Equipment and pipelines Source 4 Tenova Bateman mills AG/SAG Rod Ball Mills Source 5 Doering international cylpebs Source 6 SME handbook of mineral processing N L Weiss Editor NY 1985

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  • Effects of simple acid leaching of crushed and powdered

    where the value in parentheses is the ratio of exact masses of 206 Pb and 204 Pb respectively The NBS 981 accepted values used were the triple spike values 206 Pb 204 Pb = 16 9405 ± 15 207 Pb 206 Pb = 0 914750 ± 35 and 208 Pb 206 Pb = 2 167714 ± 10 from Galer and Abouchami which are in excellent agreement with recent double spike values for NBS 981 e g Hamelin et al 1985

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