LCZO -- Soil Biogeochemistry -- trace metal mobilization, redox -- Bisley and Guaba Ridge -- (2017-2017)


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Abstract

Redox state fluctuations are a primary mechanism controlling the mobilization of trace metals in soils. However, underlying lithology may modulate the effect that redox fluctuations have on trace metal mobility by influencing soil particle size and mineral composition. To investigate the relationships among trace metal behavior, lithology, and redox state, we subjected surface soils from two intensely weathered soil profiles formed on contrasting lithologies to consecutive, 8-day redox cycles. A suite of metals (Al, Mn, Fe, Ti, Rb, Zr, Nb, Mo, REEs, Pb, Th, U) were quantified in the aqueous phase (< 10 nm) and solution (< 415 nm, including colloids) from soil slurries. In soil formed on volcaniclastic bedrock with high clay content and a high abundance of short-range-ordered Fe-(oxyhydr)oxides phases (e.g. nano-goethite; quantified by Mössbauer spectroscopy), reducing events and colloidal dynamics drove trace metal mobilization. In contrast, in soil formed on granite bedrock with lower clay content and a low abundance of short-range-ordered Fe-(oxyhydr)oxides phases (nano-goethite and lepidocrocite), overall trace metal mobilization was lower, and mobilization was not predictable from redox state. Molybdenum isotopes were also measured through redox cycles but did not exhibit redox-dependent behavior. This study provides direct evidence that lithology remains an overarching factor governing the characteristics of metal mobility in soils, even after extended and intense chemical weathering and soil development processes.

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Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Bisley, Bisley and Guaba Ridge
North Latitude
18.3240°
East Longitude
-65.8151°
South Latitude
18.3233°
West Longitude
-65.8181°

Temporal

Start Date:
End Date:

Content

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LCZO -- Soil Biogeochemistry -- trace metal mobilization, redox -- Bisley and Guaba Ridge -- (2017)


OVERVIEW

Description/Abstract

Redox state fluctuations are a primary mechanism controlling the mobilization of trace metals in soils. However, underlying lithology may modulate the effect that redox fluctuations have on trace metal mobility by influencing soil particle size and mineral composition. To investigate the relationships among trace metal behavior, lithology, and redox state, we subjected surface soils from two intensely weathered soil profiles formed on contrasting lithologies to consecutive, 8-day redox cycles. A suite of metals (Al, Mn, Fe, Ti, Rb, Zr, Nb, Mo, REEs, Pb, Th, U) were quantified in the aqueous phase (< 10 nm) and solution (< 415 nm, including colloids) from soil slurries. In soil formed on volcaniclastic bedrock with high clay content and a high abundance of short-range-ordered Fe-(oxyhydr)oxides phases (e.g. nano-goethite; quantified by Mössbauer spectroscopy), reducing events and colloidal dynamics drove trace metal mobilization. In contrast, in soil formed on granite bedrock with lower clay content and a low abundance of short-range-ordered Fe-(oxyhydr)oxides phases (nano-goethite and lepidocrocite), overall trace metal mobilization was lower, and mobilization was not predictable from redox state. Molybdenum isotopes were also measured through redox cycles but did not exhibit redox-dependent behavior. This study provides direct evidence that lithology remains an overarching factor governing the characteristics of metal mobility in soils, even after extended and intense chemical weathering and soil development processes.

Creator/Author

King, E.K.|Thompson, A.|Pett-Ridge, J.C.

CZOs

Luquillo

Contact

Miguel Leon, Miguel.Leon@unh.edu

Subtitle

Underlying lithology controls trace metal mobilization during redox fluctuations




SUBJECTS

Disciplines

Biogeochemistry|Soil Science / Pedology

Topics

Soil Biogeochemistry

Subtopic

trace metal mobilization, redox

Keywords

Trace metal mobilization|Redox biogeochemistry|Critical zone|Molybdenum isotopes|Soil formation|Lithology

Variables

Iron|ferric ion|ferrous ion| silicon|aluminium|calcium|magnesium|sodium|potassium|titanium|manganese barium|cerium|chromium|caesium|dysprosium|Erbium|europium|gallium|gadolinium|hafnium|holmium|lanthanum|Lutetium|niobium|neodymium|praseodymium|rubidium|samarium|tin|strontium|tantalum|terbium|thorium|thulium|uranium|vanadium|tungsten|yttrium|Ytterbium|zirconium

Variables ODM2

Iron|Silicon|Aluminum|Calcium|Magnesium|Sodium, dissolved|Potassium, dissolved|Titanium|Manganese|Rare-earth elements|Niobium, total|Rubidium|Strontium, dissolved|Zirconium




TEMPORAL

Date Start

2017-05-01

Date End

2017-09-01




SPATIAL

Field Areas

Bisley

Location

Bisley and Guaba Ridge

North latitude

18.324044

South latitude

18.323332999999998

West longitude

-65.818056

East longitude

-65.815128




REFERENCE

Citation

King, E.K., Thompson, A., Pett-Ridge, J.C. (2019): Underlying lithology controls trace metal mobilization during redox fluctuations. Science of Total Environment. 665: 1147-1157.. DOI: 10.1016/j.scitotenv.2019.02.192

Publications of this data

King, E.K., Thompson, A., Pett-Ridge, J.C. (2019). Underlying lithology controls trace metal mobilization during redox fluctuations. Science of Total Environment. 665: 1147-1157. http://dx.doi.org/10.1016/j.scitotenv.2019.02.192

CZO ID

7165



Additional Metadata

Name Value
czos Luquillo
czo_id 7165
citation King, E.K., Thompson, A., Pett-Ridge, J.C. (2019): Underlying lithology controls trace metal mobilization during redox fluctuations. Science of Total Environment. 665: 1147-1157.. DOI: 10.1016/j.scitotenv.2019.02.192
keywords Trace metal mobilization, Redox biogeochemistry, Critical zone, Molybdenum isotopes, Soil formation, Lithology
subtitle Underlying lithology controls trace metal mobilization during redox fluctuations
variables Iron, ferric ion, ferrous ion, silicon, aluminium, calcium, magnesium, sodium, potassium, titanium, manganese barium, cerium, chromium, caesium, dysprosium, Erbium, europium, gallium, gadolinium, hafnium, holmium, lanthanum, Lutetium, niobium, neodymium, praseodymium, rubidium, samarium, tin, strontium, tantalum, terbium, thorium, thulium, uranium, vanadium, tungsten, yttrium, Ytterbium, zirconium
disciplines Biogeochemistry, Soil Science / Pedology

Related Resources

This resource is referenced by King, E.K., Thompson, A., Pett-Ridge, J.C. (2019). Underlying lithology controls trace metal mobilization during redox fluctuations. Science of Total Environment. 665: 1147-1157. http://dx.doi.org/10.1016/j.scitotenv.2019.02.192

How to Cite

King, E., A. Thompson, J. Pett-Ridge (2019). LCZO -- Soil Biogeochemistry -- trace metal mobilization, redox -- Bisley and Guaba Ridge -- (2017-2017), HydroShare, http://www.hydroshare.org/resource/c94a53ec169940cf948e1111c8fe1762

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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