Long-term immobilisation of Cd2+ at the Tulul Al Hammam natural analogue site, central Jordan

Ella V. Sokol; Svetlana N. Kokh; Hani N. Khoury; Yurii V. Seryotkin; Sergei V. Goryainov

doi:10.1016/j.apgeochem.2016.05.002

Long-term immobilisation of Cd²⁺ at the Tulul Al Hammam natural analogue site, central Jordan

Ella V. Sokol, Svetlana N. Kokh, Hani N. Khoury, Yurii V. Seryotkin, Sergei V. Goryainov

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

12 Цитирования (Scopus)

Аннотация

The Tulul Al Hammam area in central Jordan is a natural analogue site where to study long-term Cd²⁺ retention during the weathering of Cd-enriched combustion-metamorphic marbles with clinker-like mineralogy. Natural Cd-rich portlandite (Ca_0.67-0.45Cd_0.33-0.55)[OH]₂ was discovered and characterised by single-crystal XRD, SEM/EDS, and microprobe analyses, and Raman spectroscopy. The Ca[OH]₂ - Cd[OH]₂ solid solution ((Ca_1-xCd_x)[OH]₂) is isostructural with Ca[OH]₂ and β-Cd[OH]₂ crystals in the CdI₂-type of structure. Cd-rich portlandite is a common secondary phase in slightly altered massive marbles, where it replaces and rims single-crystals of the high-temperature precursor (Ca_1-xCd_x)O. The Cd:Ca molar ratios of (Ca_1-xCd_x)[OH]₂ are inherited from the precursor phase (Ca_1-xCd_x)O. Reliable long-term immobilisation of Cd in (Ca_1-xCd_x)[OH]₂ is assumed for pore water pH values from 10.5 up to 12 buffered by C-S-Hs formed mainly during spurrite hydration. The Tulul Al Hammam site may have some bearing on long-term Cd²⁺ retention in the concrete matrix.

Язык оригинала	английский
Страницы (с-по)	43-60
Число страниц	18
Журнал	Applied Geochemistry
Том	70
DOI	https://doi.org/10.1016/j.apgeochem.2016.05.002
Состояние	Опубликовано - 1 июл 2016

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10.1016/j.apgeochem.2016.05.002

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title = "Long-term immobilisation of Cd2+ at the Tulul Al Hammam natural analogue site, central Jordan",

abstract = "The Tulul Al Hammam area in central Jordan is a natural analogue site where to study long-term Cd2+ retention during the weathering of Cd-enriched combustion-metamorphic marbles with clinker-like mineralogy. Natural Cd-rich portlandite (Ca0.67-0.45Cd0.33-0.55)[OH]2 was discovered and characterised by single-crystal XRD, SEM/EDS, and microprobe analyses, and Raman spectroscopy. The Ca[OH]2 - Cd[OH]2 solid solution ((Ca1-xCdx)[OH]2) is isostructural with Ca[OH]2 and β-Cd[OH]2 crystals in the CdI2-type of structure. Cd-rich portlandite is a common secondary phase in slightly altered massive marbles, where it replaces and rims single-crystals of the high-temperature precursor (Ca1-xCdx)O. The Cd:Ca molar ratios of (Ca1-xCdx)[OH]2 are inherited from the precursor phase (Ca1-xCdx)O. Reliable long-term immobilisation of Cd in (Ca1-xCdx)[OH]2 is assumed for pore water pH values from 10.5 up to 12 buffered by C-S-Hs formed mainly during spurrite hydration. The Tulul Al Hammam site may have some bearing on long-term Cd2+ retention in the concrete matrix.",

keywords = "Cd-rich portlandite, Cement, Central Jordan, Long-term Cd retention, Natural analogue, Waste management",

author = "Sokol, {Ella V.} and Kokh, {Svetlana N.} and Khoury, {Hani N.} and Seryotkin, {Yurii V.} and Goryainov, {Sergei V.}",

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Long-term immobilisation of Cd²⁺ at the Tulul Al Hammam natural analogue site, central Jordan. / Sokol, Ella V.; Kokh, Svetlana N.; Khoury, Hani N.; Seryotkin, Yurii V.; Goryainov, Sergei V.

В: Applied Geochemistry, Том 70, 01.07.2016, стр. 43-60.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

TY - JOUR

T1 - Long-term immobilisation of Cd2+ at the Tulul Al Hammam natural analogue site, central Jordan

AU - Sokol, Ella V.

AU - Kokh, Svetlana N.

AU - Khoury, Hani N.

AU - Seryotkin, Yurii V.

AU - Goryainov, Sergei V.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - The Tulul Al Hammam area in central Jordan is a natural analogue site where to study long-term Cd2+ retention during the weathering of Cd-enriched combustion-metamorphic marbles with clinker-like mineralogy. Natural Cd-rich portlandite (Ca0.67-0.45Cd0.33-0.55)[OH]2 was discovered and characterised by single-crystal XRD, SEM/EDS, and microprobe analyses, and Raman spectroscopy. The Ca[OH]2 - Cd[OH]2 solid solution ((Ca1-xCdx)[OH]2) is isostructural with Ca[OH]2 and β-Cd[OH]2 crystals in the CdI2-type of structure. Cd-rich portlandite is a common secondary phase in slightly altered massive marbles, where it replaces and rims single-crystals of the high-temperature precursor (Ca1-xCdx)O. The Cd:Ca molar ratios of (Ca1-xCdx)[OH]2 are inherited from the precursor phase (Ca1-xCdx)O. Reliable long-term immobilisation of Cd in (Ca1-xCdx)[OH]2 is assumed for pore water pH values from 10.5 up to 12 buffered by C-S-Hs formed mainly during spurrite hydration. The Tulul Al Hammam site may have some bearing on long-term Cd2+ retention in the concrete matrix.

AB - The Tulul Al Hammam area in central Jordan is a natural analogue site where to study long-term Cd2+ retention during the weathering of Cd-enriched combustion-metamorphic marbles with clinker-like mineralogy. Natural Cd-rich portlandite (Ca0.67-0.45Cd0.33-0.55)[OH]2 was discovered and characterised by single-crystal XRD, SEM/EDS, and microprobe analyses, and Raman spectroscopy. The Ca[OH]2 - Cd[OH]2 solid solution ((Ca1-xCdx)[OH]2) is isostructural with Ca[OH]2 and β-Cd[OH]2 crystals in the CdI2-type of structure. Cd-rich portlandite is a common secondary phase in slightly altered massive marbles, where it replaces and rims single-crystals of the high-temperature precursor (Ca1-xCdx)O. The Cd:Ca molar ratios of (Ca1-xCdx)[OH]2 are inherited from the precursor phase (Ca1-xCdx)O. Reliable long-term immobilisation of Cd in (Ca1-xCdx)[OH]2 is assumed for pore water pH values from 10.5 up to 12 buffered by C-S-Hs formed mainly during spurrite hydration. The Tulul Al Hammam site may have some bearing on long-term Cd2+ retention in the concrete matrix.

KW - Cd-rich portlandite

KW - Cement

KW - Central Jordan

KW - Long-term Cd retention

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KW - Waste management

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DO - 10.1016/j.apgeochem.2016.05.002

M3 - Article

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EP - 60

JO - Applied Geochemistry

JF - Applied Geochemistry

SN - 0883-2927

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