Carbon capture potential and environmental impact of concrete weathering in soil

The enhanced weathering of concrete in soil has potential to capture atmospheric CO2. The objective of this research was to conduct a laboratory experiment and evaluate the environmental impacts and carbon capture potential of concrete as an enhanced weathering material in soil. A column study was conducted with four treatments comprised of: 1) 100 % soil (S treatment), 2) 90 % soil and 10 % concrete by weight of 0.25–0.71 mm diameter fragments (S + Cfine treatment), 3) 90 % soil and 10 % concrete by weight of 8–25 mm diameter fragments (S + Ccoarse treatment), and 4) 100 % concrete composed of 8–25 mm diameter fragments (C treatment). Deionized water was added to the columns for 16 weeks. The S + Cfine treatment experienced a significant increase in soil pH (8.0 ± 0.07) compared to the S (6.9 ± 0.22) and S + Ccoarse (7.1 ± 0.08) treatments. The C treatment experienced a significant increase in leachate pH. Leachate NO3− concentrations in the S + Cfine (33 ± 18 mg L−1) samples were sign..., , , # Carbon Capture Potential and Environmental Impact of Concrete Weathering in Soil

[https://doi.org/10.5061/dryad.d51c5b09k](https://doi.org/10.5061/dryad.d51c5b09k)

Soil and leachate chemical and biological data from the research article Carbon Capture Potential and Environmental Impact of Concrete Weathering in Soil.

## Description of the data and file structure

Files are independent of each other. Leachate nits are mg/L unless otherwise specified. The sample names are C/S/S+C coarse/S+C fine to distinguish between the different treatments. Samples with \"in\" or \"initial\" are values from the initial soil samples before the experiment.

| Variable | description |
| :--------------------------------------------------------------------- | :----------------------------------------------------------------------------------- |
| C1-C4 (referred in some fi...