Champiny & Lin (2024): Enhanced Weathering to Enhance Carbon Sequestration in Sandy Soils

Ryan E. Champiny, Yang Lin IN: Sandy Soils,

The use of basalt, olivine, dolomite, or crushed concrete fines as an agricultural soil amendment provides a promising method of carbon sequestration, as calcium silicate and hydroxide minerals present can remove CO2 during its weathering processes. Besides carbon sequestration, such material can be weathered into fine particles that help to stabilize soil organic matter and increase soil water-holding and nutrient-retention capacity. However, the weathering of basalt, olivine, industrial waste, etc., may also release heavy metals that pose adverse environmental and health impacts. This chapter provides an overview of the weathering process and its potential application for sandy soils.