Ahmad

Amundson

Andrews

Appelo

Barker

Barnes

Barraclough

Bertrand

Biasi

Bond-Lamberty

Chen

Claisse

Curtin

D. Jacques

D. Postma

Dhir

Dumale

E. Laloy

E.M. Thaysen

Enoch

Gundersen

Haberle

Hamilton

Hansen

Hanson

I. Jakobsen

Jacques

Jakobsen

Jala

Karberg

Khan

Kjøller

Lohila

Loveys

Malhi

Manning

Marschner

Mehta

Olesen

P. Ambus

Pade

Parkhurst

Poorter

R. Jakobsen

Raab

Ravnskov

Renforth

Robertson

S. Jessen

Schüßler

Simojoki

Tamir

Thaysen

Tukey

USDA

Vermeulen

Vrugt

Walmsley

Welch

Weligama

West

Wilson

Šimůnek

In this work we investigate how lime and crushed concrete waste (CCW) affect carbon cycling in the vadose zone and explore whether these amendments could be employed to mitigate climate change by increasing the transport of CO2 from the atmosphere to the groundwater. We use a combination of experimental and modeling tools to determine ongoing biogeochemical processes. Our results demonstrate that lime and CCW amendments to acid soil contribute to the climate forcing by largely increasing the soil CO2 efflux to the atmosphere. In a series of mesocosm experiments, with barley (Hordeum vulgare L.) grown on podzolic soil material, we have investigated inorganic carbon cycling through the gaseous and liquid phases and how it is affected by different soil amendments. The mesocosm amendments comprised the addition of 0, 9.6, or 21.2 kg m−2 of crushed concrete waste (CCW) or 1 kg lime m−2. The CCW and lime treatments increased the dissolved inorganic carbon (DIC) percolation flux by about 150 and 100%, respectively,compared to the controls. However, concurrent increases in the CO2 efflux to the atmosphere (ER) were more than one order of magnitude higher than increases in the DIC percolation flux. Analysis of soil solutions, coupled reactive-transport modeling studies, and a decrease in soil carbonate contents over the experiment altogether suggested that the increased ER from amended mesocosms was derived from the carbonate contained in the amendments, which, hence, mostly escaped to the atmosphere. Our results are important in the context of climate change due to the widespread application of lime to acidic soils. The CCW amendment had no adverse effects on plant growth and groundwater quality

Thaysen, Eike Marie

Jessen, Søren

Postma, D.

Jakobsen, R.

Jacques, D.

Ambus, Per

Laloy, E.

Jakobsen, Iver

Online Research Database In Technology

Effects of Lime and Concrete Waste on Vadose Zone Carbon Cycling

In this work we investigate how lime and crushed concrete waste (CCW) affect carbon cycling in the vadose zone and explore whether these amendments could be employed to mitigate climate change by increasing the transport of CO2 from the atmosphere to the groundwater. We use a combination of experimental and modeling tools to determine ongoing biogeochemical processes. Our results demonstrate that lime and CCW amendments to acid soil contribute to the climate forcing by largely increasing the soil CO2 efflux to the atmosphere.In a series of mesocosm experiments, with barley (Hordeum vulgare L.) grown on podzolic soil material, we have investigated inorganic carbon cycling through the gaseous and liquid phases and how it is affected by different soil amendments. The mesocosm amendments comprised the addition of 0, 9.6, or 21.2 kg m−2 of crushed concrete waste (CCW) or 1 kg lime m−2. The CCW and lime treatments increased the dissolved inorganic carbon (DIC) percolation flux by about 150 and 100%, respectively, compared to the controls. However, concurrent increases in the CO2 efflux to the atmosphere (ER) were more than one order of magnitude higher than increases in the DIC percolation flux. Analysis of soil solutions, coupled reactive-transport modeling studies, and a decrease in soil carbonate contents over the experiment altogether suggested that the increased ER from amended mesocosms was derived from the carbonate contained in the amendments, which, hence, mostly escaped to the atmosphere. Our results are important in the context of climate change due to the widespread application of lime to acidic soils. The CCW amendment had no adverse effects on plant growth and groundwater quality

Postma, Dieke

Jakobsen, Rasmus

Jacques, Diederik

Ambus, Per Lennart

Laloy, Eric

Copenhagen University Research Information System

English

Effects of lime and concrete waste on Vadose Zone carbon cycling

Crossref

Vadose Zone Journal

https://curis.ku.dk/ws/files/131361625/OA_version.pdf

Effects of Lime and Concrete Waste on Vadose Zone Carbon Cycling

Abstract

Similar works

Full text

Available Versions

Online Research Database In Technology

Copenhagen University Research Information System

Crossref