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Enzymic oxidation of phenolic precursors on the mineral surface was substantially more rapid than abiotic oxidation and led to synthesis of a highly polymeric fraction with a molecular weight over 75 kDa.
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Possible types of anion-cation packing of mineral surface were evaluated.
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Interactions between the dissolved mineral species and other mineral surface were investigated using solution chemistry calculation,ζ-potential measurement, AES analysis and flotation tests.
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Study on interaction energy between flotation reagent and mineral surface
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The interaction between a flotation reagent and mineral surface not only depends on the bonding atom, but also depends on the adjacent atom of mineral surface, a flotation reagent and the medium in the system of flotation.
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Energy equation of a reagent interacting with mineral surface has been deduced from this model.
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Elemental sulfur was present on the mineral surface in excess of oxidized lead species due to dissolution of HPbO2-, which is beneficial to the flotation of galena.
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During grinding, due to galvanic interactions between minerals and steel medium, Fe(OH)3 formed covers on the cathodic mineral surface, affecting its floatability.
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Infrared spectrum shows that there are some -OH and -CSS- in glycerine-xanthate molecule, which competes with butyl-xanthate on the mineral surface.
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A study on the reaction kinetics of mineral surface adsorption in mix system
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Therefore, the reactive ability of the ions onto mineral surface of quartz follows the order of Cd >amp;gt; Pb >amp;gt; Zn >amp;gt; Ni>amp;gt; Cu under the above-mentioned solution conditions.
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Proton affinities of these gas-phase molecules and related mineral surface species are predicted based on corrections for cluster-size effects.
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Imaging the heterogeneity of mineral surface reactivity using Ag(I) and synchrotron X-ray microscopy
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The generation of hydrogen ions was most likely related to the presence of silanols on the newly formed mineral surface, implying a change of proton activities in the fluid after pulverization of quartz.
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The adsorption kinetics was studied of anion- and cation-active tensides on mineral surface from solutionsceq >amp;lt; CMC andceq ≧ CMC, and the adsorption mechanisms of ion exchange and ion pairing were discussed.
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For instance, in the grafting of methylvinyl-dichlorosilane, this reaction is of minor importance, whereas in the case of allyldimethylchlorosilane, no allyl groups are grafted as such on the mineral surface.
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The very low concentrations are caused by the strong adsorption of the organic cations on the clay mineral surface.
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Such a mechanism has operated in a closed system and the re-equilibration related cracks have not been connected with mineral surface.
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DAL may serve as a quantitative index characterizing the distribution configuration of elements on mineral surface.
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Nevertheless minor part (>amp;lt;14%) of total Hg was identified as mineral surface bound Hg, which might undergo methylation and thus represents potential long-term environmental risk.
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