FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2998537152> ?p ?o ?g. }

• W2998537152 endingPage "115" @default.
• W2998537152 startingPage "96" @default.
• W2998537152 abstract "The geochemical behavior of nickel, an essential trace metal element, strongly depends on its interactions with Mn oxides. Interactions between the phyllomanganate birnessite and sorbed or structurally incorporated Ni have been extensively documented together with the fate of Ni along the transformation of these layered species to tunnel Mn oxides (tectomanganates). By contrast, interactions of phyllomanganates with weakly bound Ni species [hydrated Ni, Ni (hydr)oxides], that possibly prevail in natural Ni-rich (>10% NiO) manganates, have received little attention and the influence of these Ni species on the phyllomanganate-to-tectomanganate transformation remains essentially unknown. A set of phyllomanganate precursors with contrasting contents of Ni was thus prepared and subjected to a reflux treatment mimicking the natural phyllomanganate-to-tectomanganate conversion. Layered precursors and reflux products were characterized with a combination of diffractometric, spectroscopic, thermal, and chemical methods. Ni is essentially present as hydrated Ni(II) and Ni(II) (hydr)oxides in Ni-rich layered precursors whereas Ni(II) sorbed at particle edges prevail at low Ni content. No Ni sorbed at layer vacancy sites or structurally incorporated was detected in the initial vacancy-free layered precursors. Consistent with the high content (≈1/3) of Jahn-Teller distorted Mn(III) octahedra in layered precursors, which is favorable to their conversion to tectomanganates, Ni-free samples fully convert to an a-disordered todorokite, a common tectomanganate with a 3 × 3 tunnel structure. Contrastingly and despite similar high Mn(III) contents in Ni-rich precursors, hydrolysis of interlayer Ni2+ and polymerization of Ni(OH)2 in phyllomanganate interlayers is kinetically favored during reflux process. Asbolane, a phyllomanganate with an incomplete – island-like – octahedral layer of metal (hydr)oxides, is thus formed rather than todorokite. A nitric acid treatment, aiming at the dissolution of the island-like interlayer Ni(OH)2 layer, allows an easy and unambiguous differentiation between asbolane and todorokite, the latter being unaffected by the treatment. Both compounds exhibit indeed similar interplanar periodicities and can be confused when using X-ray diffraction, despite contrasting intensity ratios. Migration rate of Mn(III) out of the MnO2 layer relative to the metal hydrolysis and polymerization rate determines the formation of todorokite or asbolane. Here, Ni(OH)2 polymerization hampers the formation of tectomanganates and likely contributes to the prevalence of phyllomanganates over tectomanganates in natural Ni-rich environments. Most Ni is retained during the reflux process, part of Ni (≈20%) being likely structurally incorporated in the reaction products, thus enhancing the sequestration of Ni in Mn oxides." @default.
• W2998537152 created "2020-01-10" @default.
• W2998537152 creator A5001630552 @default.
• W2998537152 creator A5023679314 @default.
• W2998537152 creator A5033073898 @default.
• W2998537152 creator A5033699882 @default.
• W2998537152 creator A5040939816 @default.
• W2998537152 creator A5047402145 @default.
• W2998537152 creator A5048322214 @default.
• W2998537152 creator A5048959782 @default.
• W2998537152 creator A5080762512 @default.
• W2998537152 creator A5087418500 @default.
• W2998537152 date "2020-02-01" @default.
• W2998537152 modified "2023-10-17" @default.
• W2998537152 title "Transformation of Ni-containing birnessite to tectomanganate: Influence and fate of weakly bound Ni(II) species" @default.
• W2998537152 cites W1780535287 @default.
• W2998537152 cites W1866734872 @default.
• W2998537152 cites W1956087068 @default.
• W2998537152 cites W1964940890 @default.
• W2998537152 cites W1965028572 @default.
• W2998537152 cites W1977501870 @default.
• W2998537152 cites W1980361407 @default.
• W2998537152 cites W1983310755 @default.
• W2998537152 cites W1983823156 @default.
• W2998537152 cites W1984042965 @default.
• W2998537152 cites W1984430784 @default.
• W2998537152 cites W1984596330 @default.
• W2998537152 cites W1986035618 @default.
• W2998537152 cites W1987094455 @default.
• W2998537152 cites W1988960405 @default.
• W2998537152 cites W1994740770 @default.
• W2998537152 cites W1995522656 @default.
• W2998537152 cites W1996637237 @default.
• W2998537152 cites W1996960521 @default.
• W2998537152 cites W2001559779 @default.
• W2998537152 cites W2002287763 @default.
• W2998537152 cites W2002877849 @default.
• W2998537152 cites W2004501021 @default.
• W2998537152 cites W2011484377 @default.
• W2998537152 cites W2014737845 @default.
• W2998537152 cites W2015480719 @default.
• W2998537152 cites W2028651219 @default.
• W2998537152 cites W2029320828 @default.
• W2998537152 cites W2031116677 @default.
• W2998537152 cites W2031128054 @default.
• W2998537152 cites W2033540334 @default.
• W2998537152 cites W2037482331 @default.
• W2998537152 cites W2041291423 @default.
• W2998537152 cites W2044427091 @default.
• W2998537152 cites W2044624973 @default.
• W2998537152 cites W2046764742 @default.
• W2998537152 cites W2047125693 @default.
• W2998537152 cites W2051805648 @default.
• W2998537152 cites W2052321137 @default.
• W2998537152 cites W2052394654 @default.
• W2998537152 cites W2054495841 @default.
• W2998537152 cites W2055070367 @default.
• W2998537152 cites W2061246183 @default.
• W2998537152 cites W2061530776 @default.
• W2998537152 cites W2061761608 @default.
• W2998537152 cites W2066070540 @default.
• W2998537152 cites W2068326263 @default.
• W2998537152 cites W2071959285 @default.
• W2998537152 cites W2079498583 @default.
• W2998537152 cites W2081704910 @default.
• W2998537152 cites W2082568683 @default.
• W2998537152 cites W2083894805 @default.
• W2998537152 cites W2086738836 @default.
• W2998537152 cites W2093391449 @default.
• W2998537152 cites W2095664287 @default.
• W2998537152 cites W2097422474 @default.
• W2998537152 cites W2103302129 @default.
• W2998537152 cites W2110221529 @default.
• W2998537152 cites W2110850807 @default.
• W2998537152 cites W2115837617 @default.
• W2998537152 cites W2116739191 @default.
• W2998537152 cites W2122574387 @default.
• W2998537152 cites W2125667611 @default.
• W2998537152 cites W2128740009 @default.
• W2998537152 cites W2131102784 @default.
• W2998537152 cites W2131471181 @default.
• W2998537152 cites W2140408128 @default.
• W2998537152 cites W2144379540 @default.
• W2998537152 cites W2149421142 @default.
• W2998537152 cites W2162555168 @default.
• W2998537152 cites W2165764857 @default.
• W2998537152 cites W2166317225 @default.
• W2998537152 cites W2167590372 @default.
• W2998537152 cites W2167828944 @default.
• W2998537152 cites W2170424371 @default.
• W2998537152 cites W2182633026 @default.
• W2998537152 cites W2303609792 @default.
• W2998537152 cites W2306153471 @default.
• W2998537152 cites W2326802745 @default.
• W2998537152 cites W2337234730 @default.
• W2998537152 cites W2404898580 @default.
• W2998537152 cites W2413751562 @default.
• W2998537152 cites W2415073533 @default.

• next