Palladium Chemistry in Seawater

Lee Kump; Robert H. Byrne

doi:10.1021/es00064a003

Palladium Chemistry in Seawater

Lee Kump, Robert H. Byrne

Geosciences

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27 Scopus citations

Abstract

The solution chemistry of palladium has been examined directly in seawater by ultraviolet absorbance spectroscopy. Our results indicate that chloride complexation strongly suppresses the hydrolysis of Pd²⁺ in seawater. At 25 °C and salinity equal to 36, hydroxy complexes account for ~18% of the total palladium and the remainder is present principally as PdCl₄^2-. Strong similarities previously reported for Pd and Ni distributions in seawater appear to have dissimilar origins at the molecular level. The enormous reactivity of Pd²⁺ relative to Ni²⁺ appears to be moderated, in seawater, by extensive complexation of Pd²⁺ with chloride ions.

Original language	English (US)
Pages (from-to)	663-665
Number of pages	3
Journal	Environmental Science and Technology
Volume	23
Issue number	6
DOIs	https://doi.org/10.1021/es00064a003
State	Published - Jan 1 1989

All Science Journal Classification (ASJC) codes

General Chemistry
Environmental Chemistry

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abstract = "The solution chemistry of palladium has been examined directly in seawater by ultraviolet absorbance spectroscopy. Our results indicate that chloride complexation strongly suppresses the hydrolysis of Pd2+ in seawater. At 25 °C and salinity equal to 36, hydroxy complexes account for ~18% of the total palladium and the remainder is present principally as PdCl42-. Strong similarities previously reported for Pd and Ni distributions in seawater appear to have dissimilar origins at the molecular level. The enormous reactivity of Pd2+ relative to Ni2+ appears to be moderated, in seawater, by extensive complexation of Pd2+ with chloride ions.",

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N2 - The solution chemistry of palladium has been examined directly in seawater by ultraviolet absorbance spectroscopy. Our results indicate that chloride complexation strongly suppresses the hydrolysis of Pd2+ in seawater. At 25 °C and salinity equal to 36, hydroxy complexes account for ~18% of the total palladium and the remainder is present principally as PdCl42-. Strong similarities previously reported for Pd and Ni distributions in seawater appear to have dissimilar origins at the molecular level. The enormous reactivity of Pd2+ relative to Ni2+ appears to be moderated, in seawater, by extensive complexation of Pd2+ with chloride ions.

AB - The solution chemistry of palladium has been examined directly in seawater by ultraviolet absorbance spectroscopy. Our results indicate that chloride complexation strongly suppresses the hydrolysis of Pd2+ in seawater. At 25 °C and salinity equal to 36, hydroxy complexes account for ~18% of the total palladium and the remainder is present principally as PdCl42-. Strong similarities previously reported for Pd and Ni distributions in seawater appear to have dissimilar origins at the molecular level. The enormous reactivity of Pd2+ relative to Ni2+ appears to be moderated, in seawater, by extensive complexation of Pd2+ with chloride ions.

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Palladium Chemistry in Seawater

Abstract

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