Adsorption aus sehr verdünnten Kupferlösungen an reinen Tonmineralen

Heydemann, Annerose

doi:10.1016/0016-7037(59)90064-x

Cited by 47 publications

(5 citation statements)

References 22 publications

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“…Although many sorption studies have been done with hydrous metal oxides and clay minerals, there have been relatively few experimental studies on the sorption of trace metals on calcite (HEYDEMANN, 1959;MCBRIDE, 1979MCBRIDE, , 1980JURINAK and BAUER, 1956;KITANO et al, 1976;FRANKLIN andMORSE, 1982, 1983;KORNICKER et al, 1985). Most of the studies on calcite show remarkable agreement as regards observations on the kinetics of the sorption processes: an initial rapid uptake of the trace metal followed by a period of relatively slow removal from solution.…”

mentioning

confidence: 67%

Sorption of trace metals on calcite: Applicability of the surface precipitation model

Comans

Middelburg

1987

Geochimica et Cosmochimica Acta

126

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Abstract-Published sorption isotherm data of Cd'+, Mt?, Zn*+, and Co*+ on calcite are adequately described by the surface precipitation model which was originally developed by FARLEY ef al. (1985) for the sorption of cations on metal oxides. In addition to monolayer adsorption, the model accounts for the formation of a surface phase with a composition that is described by a solid solution having as end members the sorbent calcium carbonate mineral and a pure carbonate precipitate of the sorbing trace metal. The model thus specifies a continuum between adsorption and precipitation. This feature is supported in the literature by observations on the reaction kinetics and the amount of surface coverage during trace metal sorption on calcite. The apparent adsorption constants of these trace metals, as derived from the model, can be ranked according to the degree to which their ionic radii match the ionic radius of Ca2'.

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mentioning

confidence: 67%

Sorption of trace metals on calcite: Applicability of the surface precipitation model

Comans

Middelburg

1987

Geochimica et Cosmochimica Acta

126

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“…Copper adsorption on carbonate surfaces has received significant attention during the past two decades. For instance, Heydemann found that the adsorption of Cu 2+ onto calcite surfaces is complex indicating a mechanism of multiple steps. Kitano et al .…”

Section: Introductionmentioning

confidence: 99%

Transformation of Vaterite into Cubic Calcite in the Presence of Copper(II) Species

et al. 1998

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By a simple washing of vaterite with ultrapure water, it transforms rapidly into cubic calcite. When the solid is washed with Cu 2+ solutions, the transformation depends on the concentrations of the copper solutions applied in the process. For concentrations of 10 -4 mol dm -3 , a certain delay in the transformation process is detected, and the obtained cubic calcite seems to be in the form of Cu x Ca 1-x CO 3 . For concentrations of 10 -3 mol dm -3 , the vaterite structure remains stable with time, and this stability seems to be correlated with the saturation of the surface by Cu 2+ in place of Ca 2+ . For concentrations of 10 -2 mol dm -3 , a mixture of vaterite, aragonite, cubic calcite, and malachite is obtained during the transformation process.

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“…Although Ag, Cd, Co, and Hg exceeded the damage control target values in some areas, the environmental risk (solubility) was negligible due to the alkaline medium (Heydemann 1959;McBride 1994;Kabata-Pendias 2001). The outlier Cd concentrations in Fig.…”

Section: Fig 3 Water Level Of Tornamentioning

confidence: 98%

Results of the clean-up operation to reduce pollution on flooded agricultural fields after the red mud spill in Hungary

Uzinger

Anton

Ötvös³

et al. 2015

Environ Sci Pollut Res

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In Hungary, the dam of a red mud reservoir breached shortly after noon on October 4, 2010. Approximately 0.7-1 million m(3) highly alkaline red mud with very low dry matter content flowed into the Torna Creek and the surrounding area, covering 1017 ha of agricultural land. Results of the risk assessment of the accident indicated that the red mud should be removed from the surface of fields where it formed a continuous layer of more than 5 cm. After the removal, samples were taken manually from depths of 0.0-0.2 m and 0.2-0.4 m in a sampling grid and background samples unaffected by red mud from the depth of 0.0-0.3 m. Total element contents (Ag, As, Ba, Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Sn, Zn, and Na) and pH values were measured, and the results were analysed using correlation analysis and the Kruskal-Wallis probe. Dependence of the measured variables from elevation above sea level was studied using a 10 m by 10 m digital elevation model. Only ∼6.5% of the flooded area was temporarily designated as unsuitable for the production of food and fodder crops. In summary, the clean-up operation can be said to have been a success.

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Adsorption aus sehr verdünnten Kupferlösungen an reinen Tonmineralen

Cited by 47 publications

References 22 publications

Sorption of trace metals on calcite: Applicability of the surface precipitation model

Sorption of trace metals on calcite: Applicability of the surface precipitation model

Transformation of Vaterite into Cubic Calcite in the Presence of Copper(II) Species

Results of the clean-up operation to reduce pollution on flooded agricultural fields after the red mud spill in Hungary

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