Impact of the decarboxylation reaction on rare earth elements binding to organic matter: From humic substances to crude oil

Geochemical analyses of Zn, Pb and rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) in the kerogen of the black marl at the Cretaceous - Paleogene boundary Fish Clay at H?jerup were performed. Substantial proportions of the Zn, Pb and rare earths were probably contained in terrestrial humic substances (the kerogen precursor) arriving at the marine sedimentary site. This is in accord with a previous hypothesis that kerogen is mainly derived from humic acids of an oxic soil in of the adjacent coastal areas of eastern Denmark. It is also suggested that humics enriched in Zn, Pb and rare earth elements were transported mainly through fluvial transport into the deposition site of the Fish Clay. Local weathering/leaching of the impact-eject fallout on the land surface and local terrestrial rocks by impact-induced? acid surface waters perhaps played an important role in providing Zn, Pb and rare earths to these humic substances. Apparently, chondritic and non-chondritic Zn originated from the impact fallout; Pb and rare earth elements were most likely sourced by exposed rocks in the coastal areas of eastern Denmark.

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Influence of dissolved organic matter on rare earth elements and yttrium distributions in coastal waters

Chemistry and Ecology ◽

10.1080/02757541003627720 ◽

2010 ◽

Vol 26 (2) ◽

pp. 123-135 ◽

Cited By ~ 15

Author(s):

P. Censi ◽

P. Zuddas ◽

L. A. Randazzo ◽

F. Saiano ◽

S. Mazzola ◽

...

Keyword(s):

Organic Matter ◽

Rare Earth ◽

Dissolved Organic Matter ◽

Rare Earth Elements ◽

Coastal Waters

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Rare Earth Elements (REE) as Transformation Indicators of Organic Matter; Case Study of the Woodford Shale, North Central Oklahoma

10.1190/urtec2013-041 ◽

2013 ◽

Author(s):

D. Ramirez-Caro ◽

M. Totten ◽

S. Chaudhuri ◽

N. Clauer ◽

R. Boutin ◽

...

Keyword(s):

Organic Matter ◽

Rare Earth ◽

Rare Earth Elements ◽

Woodford Shale ◽

North Central

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Cretaceous – Paleogene boundary Fish Clay at Højerup (Stevns Klint, Denmark): trace metals in kerogen

BSGF - Earth Sciences Bulletin ◽

10.2113/gssgfbull.178.5.411 ◽

2007 ◽

Vol 178 (5) ◽

pp. 411-421 ◽

Cited By ~ 1

Author(s):

Pavle I. Premović ◽

Bratislav Ž. Todorović ◽

Mirjana S. Pavlović

Keyword(s):

Rare Earth ◽

Trace Metals ◽

Rare Earth Elements ◽

Humic Substances ◽

Rare Earths ◽

Land Surface ◽

Coastal Areas ◽

Geochemical Analyses ◽

The Impact ◽

Fish Clay

Abstract Geochemical analyses of trace metals (Ir, Ni, Co, Cr, Zn, Au and Pb) and rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) in kerogen of the black marl at the Cretaceous–Paleogene boundary Fish Clay at Højerup have been undertaken. Substantial proportions of the trace metals and rare earths were probably contained in terrestrial humic substances (the kerogen precursor) arriving at the marine sedimentary site. This is in accord with a previous hypothesis that kerogen is mainly derived from humic acids of an oxic soil in of the adjacent coastal areas of eastern Denmark. It is also suggested that humics were transported mainly through fluvial transport into the site of the deposition of the Fish Clay. The local weathering/leaching of the impact-ejecta fallout on the land surface or local terrestrial rocks by impact-induced? acid surface waters perhaps played an important role in providing trace metals and rare earths for these humic substances. Apparently, chondritic Ir, Au, Ni, Co, Cr and chondritic and non-chondritic Zn originated from the impact fallout; Pb and rare earth elements were most likely sourced by the rocks exposed in the coastal areas of eastern Denmark.

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Rare Earth Elements of Ajali Sandstone, SW, Anambra Basin in Nigeria: Implication for Soil Genesis

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v24i11.22 ◽

2021 ◽

Vol 24 (11) ◽

pp. 1999-2004

Author(s):

M Ilevbare

Keyword(s):

Organic Matter ◽

Rare Earth ◽

Soil Organic Matter ◽

Rare Earth Elements ◽

Inductively Coupled Plasma ◽

Organic Matter Content ◽

Matter Content ◽

Fractionation Process ◽

Anambra Basin ◽

And Migration

The Ajali Sandstone, South-western, Anambra Basin, was studied for Rare Earth Elements (REEs), using a Phillips 45 channel Inductively Coupled Plasma (ICP) Emission Spectrometer. The standard deviation of the REEs (Dy, Er, Eu, Y, Yb, La and Nd) averages 3.5 mg/L, 0.34 mg/L, 0.32 mg/L, 3.93 mg/L, 1.96 mg/L, 4.02 mg/L and 2.24 mg/L respectively for each of the sampled locations. The REEs concentrations showed both positive and negative concentration anomalies. The enrichment or depletion of the REEs is generally attributed to their tendency to be incorporated into plagioclase preferentially over other minerals. The Ajali Formation is predominantly sand/sandstone, with clay occurring only as intercalations/thin beds of clay drapes with the increasing particle size of the sand grains, makes the rate of adsorption and distribution of REEs in the soil low, and explains the low values of REEs concentration. Soil organic matter (SOC) plays an important role in the adsorption and migration of REEs in the Ecosystems. The SOC is linearly associated with REEs Concentration as it increases with increasing content of SOC. The Ajali Sandstone studied falls in the vicinity of abandoned cropland to cropland in a lower/gentle slope region, correspondingly low in soil organic matter content and as such slow rate of distribution and migration of REEs concentrations in the Ajali Sandstone. The sesquioxides such as Fe oxides increases as REEs contents increases. The 0.46 mean value of Fe2O3 in the Sandstone of the area studied implies a low REEs adsorption rate and subsequently the very low REEs concentrations of the soils. The istribution of REEs within the Ajali Formation soils were grossly affected by the factors that influenced the adsorption and migration rate of the minerals during magmatic fractionation process, hence the low REEs concentration of the Sediments. Keywords`: Sansdstone, Anambra Basin, Rare Earth Elements, Magmatic fractionation

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Evaluation of Behavior of Rare Earth Elements Based on Determination of Chemical State in Groundwater in Granite

ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 2 ◽

10.1115/icem2010-40072 ◽

2010 ◽

Author(s):

Yuhei Yamamoto ◽

Daisuke Aosai ◽

Takashi Mizuno

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Humic Substances ◽

Spectroscopic Analysis ◽

Membrane Filter ◽

Chemical Properties ◽

Ground Level ◽

Chemical State ◽

The Stability ◽

Underground Research Laboratory

The chemical state of rare earth elements (REEs) in groundwater was determined by a combination of ultrafiltration techniques maintaining in–situ pressures and anaerobic conditions, speciation considering contribution of natural organic matter, and fingerprinting using REE patterns of the stability constants for probable complexes of REEs in groundwater. Groundwater samples were collected from a horizontal borehole at a depth of 200 mbGL (meter below ground level) in the Mizunami Underground Research Laboratory (MIU), Gifu, Japan. Spectroscopic analysis for colloidal matter on a membrane filter was also conducted to estimate chemical properties of colloidal ligands. Results of this study suggest that REEs–humic complexes are the dominant chemical states of REEs in this groundwater. The presence of humic substances in groundwater was also confirmed by spectroscopic analysis. Thus, it is expected that chemical behavior of REEs mainly is dependent on humic substances. The information of chemical state of REEs is useful for prediction of behavior of trivalent actinides in groundwater.

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