C.-L.Washbourne, P.Renforth, D.A.C.Manninga
This paper investigates the potential for engineered urban soils to capture and store atmospheric carbon (C). Calcium (Ca) and magnesium (Mg) bearing waste silicate minerals within the soil environment can capture and store atmospheric C through the process of weathering and secondary carbonate mineral precipitation. Anthropogenic soils, known to contain substantial quantities of Ca and Mg-rich minerals derived from demolition activity (particularly cement and concrete), were systematically sampled at the surface across a 10 ha brownfield site, Science Central, located in the urban ...
P. Renforth*, C.-L. Washbourne, J. Taylder, and D. A. C. Manning
Atmospheric carbon dioxide sequestered as carbonates through
the accelerated weathering of silicate minerals is proposed as a climate change
mitigation technology with the potential to capture billions of tonnes of carbon
per year. Although these materials can be mined expressly for carbonation, they
are also produced by human activities (cement, iron and steel making, coal
combustion, etc.). Despite their potential, there is poor global accounting of
silicates produced in this way. This paper presents production estimates (by
proxy) of various ...