210 results for group: journal-article
Simulating carbon capture by enhanced weathering with croplands: an overview of key processes highlighting areas of future model development
Lyla L. Taylor, David J. Beerling, Shaun Quegan, Steven A. Banwart
Abstract
Enhanced weathering (EW) aims to amplify a natural sink for CO2by incorporating powdered silicate rock with high reactive surface area into agricultural soils. The goal is to achieve rapid dissolution of minerals and release of alkalinity with accompanying dissolution of CO2into soils and drainage waters. EW could counteract phosphorus limitation and greenhouse gas(GHG) emissions in tropical soils, and soil acidification, a common agricultural problem studied with numerical process models over several decades. Here, we review the processes leading to soil acidifica...
Effects of mineralogy, chemistry and physical properties of basalts on carbon capture potential and plant-nutrient element release via enhanced weathering
Amy L.Lewis, Binoy Sarkar, Peter Wadea, Simon J.Kemp, Mark E.Hodson, Lyla L.Taylor, Kok Loong Yeong, Kalu Davies, Paul N.Nelson, Michael I.Bird, Ilsa B.Kantola, Michael D.Masters, Evan DeLucia, Jonathan R.Leake, Steven A.Banwart, David J.Beerling
Abstract
Mafic igneous rocks, such as basalt, are composed of abundant calcium- and magnesium-rich silicate minerals widely proposed to be suitable for scalable carbon dioxide removal (CDR) by enhanced rock weathering (ERW). Here, we report a detailed characterization of the mineralogy, chemistry, particle size and surface area of six mined basalts being used in large-scale ERW field trials. We use 1-D ...
Enhanced weathering using basalt rock powder: carbon sequestration, co-benefits and risks in a mesocosm study with Solanum tuberosum.
Arthur Vienne, Silvia Poblador, Miguel Portillo-Estrada, Jens Hartmann, Samuel Ijiehon, Peter Wade, Sara Vicca1
Abstract
Enhanced weathering (EW) of silicate rocks can remove CO2 from the atmosphere, while potentially delivering co-benefits for agriculture (e.g. reduced nitrogen losses, increased yields). However, quantification of inorganic carbon sequestration through EW and potential risks in terms of heavy metal contamination have rarely been assessed. Here, we investigate EW in a mesocosm experiment with Solanum tuberosum growing on alkaline soil. Amendment with 50 t basalt/ha significantly increased alkalinity in soil pore water and in ...
The usefulness of the rock dust for the remediation of soils contaminated with nickel
Marek Jakubowski, Ewa Stanisławska-Glubiak, Bernard Gałka
Abstract
The purpose of this research was to examine whether the addi-tion of waste rock dust to light soil contaminated with nickel will increase the yields of cultivated plants and reduce their excessive nickel content. The research was conducted in concrete microplots of 1 m2 dimension in the complete randomisation system, as a two-factor experiment in four replications. The first factor was the level of soil contamination: (1) Ni0 – soil with natural Ni content; (2) Ni1 – 100; (3) Ni2 – 150 and (4) Ni3 – 270 mg • kg-1 of the soil. The second factor was the level of ...
Agronomic potential of four rock powders, pure or mixed, as soil remineralizers
Gabriel Octávio de Mello Cunha, Jaime antonio de Almeida
Abstract
Detailed knowledge of chemical, petrographic and mineralogical compositions as well as the effects of applying rock powder on soil chemical properties and plant production are required for classifying these materials as soil remineralizers (SR), as according to Brazilian legislation in force. This study aimed to evaluate the potential of rock powders siltstone, tephrite and olivine melilitite, pure or mixed, on improving the fertility of a Cambisol and a Nitisol as well as the yield of soybean and barley crops grown in succession inside a greenhouse. For that purpose, these ...
Application of andesite rock as a clean source of fertilizer for eucalyptus crop: Evidence of sustainability
Adilson Celimar Dalmora, Claudete Gindri Ramos, Marcos Leandro Silva Oliveir, Luis Felipe Silva Oliveir, Ivo André Homrich Schneider, Rubens MullerKautzmann
Abstract
Global demineralization of agricultural soils due to unsustainable use of highly soluble fertilizers and intensive exploitation is an issue of increasing concern. Methods of remineralization include the application of volcanic rock by-product, such as vesicular andesite on mineral-deficient fields. The present work analyzed the petrography, mineralogy, and chemistry of volcanic rock by-product (vesicular andesite rock), as well as on-field experiment with eucalyptus. The petrogra...
Evaluation of Soil Re-mineralizer from By-Product of Volcanic Rock Mining: Experimental Proof Using Black Oats and Maize Crops
Claudete Gindri Ramos, Diego dos Santos de Medeiros, Leandro Gomez, Luis Felipe Silva Oliveira, Ivo André Homrich Schneider, Rubens Muller Kautzmann
Abstract
This study was focused on physical, petrographical, mineralogical, and chemical characterization of a volcanic-rock mining by-product (dacite rock), as well as on greenhouse experiment with black oats and maize crops to evaluate the potential use of the by-product as soil re-mineralizer. The by-product sample was obtained from a quarry in the Nova Prata mining district in southern Brazil. The particle size distribution of the by-product and soil was determined by sieving. Dacite rock ...
The contribution of agricultural lime to carbon dioxide emissions in the United States: dissolution, transport, and net emissions
Tristram O.West, Allen C.McBride
Abstract
Agricultural lime (aglime) is commonly applied to soils in the eastern U.S. to increase soil pH. Aglime includes crushed limestone (CaCO3) and crushed dolomite (MgCa(CO3)2). Following the supposition by the Intergovernmental Panel on Climate Change (IPCC) that all C in aglime is eventually released as CO2 to the atmosphere, the U.S. EPA estimated that 9 Tg (Teragram = 1012 g = 106 metric tonne) CO2 was emitted from an approximate 20 Tg of applied aglime in 2001. A review of historic data on aglime production and use indicates that 30 Tg may better represent the annual U.S. consumption of aglime. More ...
Rapid Removal of Atmospheric CO2 by Urban Soils
Carla-Leanne Washbourne, Elisa Lopez-Capel, Phil Renforth, Philippa L. Ascough, and David A. C. Manning
Abstract
The measured calcium carbonate content of soils to a depth of 100 mm at a large urban development site has increased over 18 months at a rate that corresponds to the sequestration of 85 t of CO2/ha (8.5 kg of CO2 m–2) annually. This is a consequence of rapid weathering of calcium silicate and hydroxide minerals derived from the demolition of concrete structures, which releases Ca that combines with CO2 ultimately derived from the atmosphere, precipitating as calcite. Stable isotope data confirm an atmospheric origin for carbonate ...
