Alkaline industrial wastewaters from steel or cement production are ideally suited to bind and sequester carbon dioxide (CO₂) chemically, safely, and for the long term. This is the result of a study conducted by the Helmholtz-Zentrum Hereon. Until now, this wastewater has been disposed of into rivers without using its CO2-sequestration capacity. In the future, it could neutralize millions of tons of CO₂—offering an attractive and implementable option to mitigate climate change. The study was recently published in the journal Environment, Science & Technology Letters.
Alkaline steel and cement wastewater could capture 30 million tons of CO₂ annually
