The Dissolution of Olivine Added to Soil at 4°C: Implications for Enhanced Weathering in Cold Regions

Crushed olivine was added to a soil core mimic enhanced weathering, and water continually dripped through for ~6 months. Our experiments were conducted at 4°C, are compared previously run identical 19°C. Olivine dissolution rates in both start out similar, likely due fines sharp crystal corners. However, after >100 days of reaction, the rate 4°C two orders magnitude lower than The accumulation heavy metals, such as Ni Cd, low experiments, but retention these elements proportionally higher temperatures, sorption formation clays. Overall, this study suggests that natural settings slower normal laboratory weathering may be considerably less efficient method carbon dioxide removal climatic temperatures. Both conclusions have implications application CO 2 method.