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Showing 1 to 20 of 62 for “"vermiculite"”.
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ADSORPTION OF ANTIBIOTICS BY VERMICULITE
… (OFL), and enrofloxacin (ENR), onto natural vermiculite has been studied using batch (static) and column (dynamic) adsorption techniques. The Langmuir and Freundlich isotherm models were initially used to explain the adsorption processes. The separation factor (RL) values derived from the …
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Hydrolysis of aluminum in synthetic cation exchange resins and dioctahedral vermiculite
… were exchangeable. Purified dioctahedral vermiculite from a Nason soil was expanded using successive treatments of N BaCl₂, reducing the potassium level In the sample to 0.05 percent. Tota] analysis yielded the average formula …
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Update and comparison of cumulative fiber exposure estimates for workers in a facility expanding Libby vermiculite
… is associated with health effects in a Libby vermiculite exposed cohort. This study refines the original 1980 exposure estimates and compares the CFE results. </p><p>Methods: CFE estimates were developed using three times more industrial hygiene measurements and long-term worker’s input. New …
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Clay mineralogy and soil classification of alluvial and upland soils associated with Blackwater and Nottoway rivers in southeastern Virginia
… revealed that kaolinite and hydroxy interlayer vermiculite were the dominant clay minerals; that montmorillonite, mica, gibbsite quartz, and vermiculite were of lesser quantities; that chlorite, feldspar and interstratified minerals were of trace amounts. Kaolinite represents about 21-70%, HlV …
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SUBSTRATOS ALTERNATIVOS NA ACLIMATIZAÇÃO DE Phargmipedium sargentianum ROLFE (ORCHIDACEAE)
… being composed by: T1 sphagnum =; T2 = vermiculite; T3 = sugar cane bagasse carbonized; T4 = sphagnum + vermiculite; T5 = sphagnum + sugar cane bagasse carbonized; T6 = Vermiculite + sugar cane bagasse carbonized, at a ratio of 1:1, totaling six substrates with five replications. The …
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Soilless media for seed germination and growth of tomato transplants, and for the rooting of certain herbaceous stem cuttings
… various proportions and combinations of Weblite, vermiculite, Jiffy Mix, peat moss and sand. The available moisture, porosity,field capacity and permanent wilting point of these 2b media were determined. This information was compared with the results from the germination and growth study of tomato …
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Novas alternativas de remoção de enxofre do óleo diesel utilizando tensoativos e microemulsões
… an extracting agent in liquid-liquid extraction. Vermiculite was evaluated as adsorbent. The microemulsion systems applied for vermiculite surface modification were composed by RNX95 (surfactant), n-butanol (cosurfactant), n-hexane (oil phase), and different aqueous phases, including: distilled …
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Root responses to soil physical conditions and the role of root-particle contact
… shoot elongation o f maize and lupin in soil and vermiculite at matric potentials ranging from -0.03 MPa to -1.6 MPa were investigated. Both root and shoot elongation rate of maize and lupin were significantly slower in vermiculite than in soil (p <0.001). As vermiculite has very different …
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ΠΡΟΣΡΟΦΗΣΗ U, TH, BA ΚΑΙ CS ΑΠΟ ΟΡΥΚΤΑ ΤΗΣ ΑΡΓΙΛΛΟΥ ΚΑΙ ΣΥΝΘΕΤΙΚΑ ΟΡΥΚΤΑ-ΕΚΛΕΚΤΙΚΟΤΗΤΑ ΚΑΙ ΔΕΣΜΕΥΣΗ ΤΟΥ CS
THE BEHAVIOUR OF VERMICULITE AS ADSORBENT OF URANYL IONS WAS FOUND TO BE IDENTICAL TO MONTMORILLONITE, WHEREAS THE QUANTITY OF THE ADSORBED HYDROXY. THE IONS WAS MUCH LOWER THAN ITS THEORETICAL CATION EXCHANGE CAPACITY. THE LATER IS ATTRIBUTABLE TO A BLOCKING OF VERMICULITE'S CATION EXCHANGE …
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Acidity of certain Virginia soils as related to their mineralogy and chemistry
… clay minerals present are kaolinite and vermiculite. From the acidity standpoint, the surface soils, compared to the subsoils, have better developed hydroxy-Al interlayers in the vermiculite. In the subsoils of the three soils the hydroxy-Al interlayer development is in this order: …
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Propagação e micropropagação de lisianthus
… ppm and 4000 ppm) in powder and 3 substrates (vermiculite, topsoil, vermiculite and topsoil), has been reported the root length, percentage of live leaves, number of roots and number of live leaves to root. The experiment used micropropagation lisianthus seedlings grown in vitro as a source of …
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Soils and soil clay mineral formation in the Virginia Blue Ridge and Piedmont provinces
… soils, the major clay minerals are kaolin and vermiculite. Topography affects the degree of profile development, color, and soil texture and controls the rate of clay mineral accumulation and weathering. The climates of the Blue Ridge and Piedmont are most favorable to the formation of kaolin …
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Clay mineralogy of sediments and source materials in the York River tributary basin
… kaolinite, illite, expandable illite. typical vermiculite atypical vermiculite, montmorillonite and mixed-layer clay minerals involving 10 A and 14 A layers. Kaolinite is present in all source area samples Vermiculite is the next most frequent source mineral followed by illite. Montmorillonite …
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Potencial fisiológico de sementes de feijão guandú em diferentes substratos e temperaturas
… "germitest" between washed sand and between vermiculite) and temperatures (25, 30, constant 35 ° C and 20-30 ° C AC). In the evaluating of the treatment effect was made germination and vigor tests (first count and index of germination speed and length and dry mass of shoots and roots). The …
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Development of native species of Crete in the urban landscape: an investigation of systems and plant reproduction, adaptability and fitness of wild species in commercial horticulture
… 100% rooting. Best substrates were peat-moss+vermiculite, vermiculite, sand and vermiculite and best seasons autumn, spring or late autumn, early summer, and spring for Staehelina. Ptilostemon, Otanthus and Prasium, respectively. Cross-cutting and BA on the base of Sternbergia sicula increased …
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An Integrative Approach to Evaluating Radiocesium Contamination in Fukushima Prefecture
… behavior and mechanisms of Cs<sup>+</sup> in vermiculite, 2) using plants as bioindicators to elucidate long-term radiation exposure and testing the bioindicators as possible sources of phytoremediation, and 3) experimenting with a Cs<sup>+</sup>-capturing ligand to develop a chemical …
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The effect of ectomycorrhizae on the uptake of lead by Pinus sylvestris L. seedlings
… roots can take up more lead from a vermiculite/hydroponic solution mixture because of their greater surface area and exploration of vermiculite surfaces as well as their increased production of lead solubilizing acids. This additional lead found in mycorrhizal roots, however, does …
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