Composite number

Environmental chemistry

Carbon fibers

Composite material

Organic chemistry

Aqueous solution

Chemistry

Materials science

Carbonate

Bicarbonate

Environmental science

Carbon dioxide

Tonne

Dissolution

Nature Communications

7 billion tonnes of alkaline materials are produced globally each year as a product or by-product of industrial activity. The aqueous dissolution of these materials creates high pH solutions that dissolves CO 2 to store carbon in the form of solid carbonate minerals or dissolved bicarbonate ions. Here we show that these materials have a carbon dioxide storage potential of 2.9–8.5 billion tonnes per year by 2100, and may contribute a substantial proportion of the negative emissions required to limit global temperature change to &lt;2 °C.

The negative emission potential of alkaline materials