Study Reveals Alkaline Industrial Wastewater's Potential for CO2 Sequestration
Alkaline industrial wastewater from steel and cement production can effectively sequester CO2, presenting a viable climate change mitigation strategy. Research from Germany's Helmholtz-Zentrum Hereon indicates this method could neutralize millions of tonnes of CO2, previously overlooked during wastewater disposal.
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Research indicates that alkaline industrial wastewater from sectors like steel and cement can bind millions of tonnes of CO2. Traditionally, this wastewater was neutralized with acids before disposal, neglecting its CO2 sequestration potential.
Instead, if CO2 is used for neutralization, the wastewater can convert it into bicarbonate on an industrial scale. This contrasts with other methods, such as transporting rock flour to the ocean, which pose logistical challenges and uncertain reactions.
Additionally, Norway's Northern Lights CCS project is actively injecting biogenic CO2 captured from wastewater, indicating a growing focus on innovative carbon capture solutions. The findings may influence future wastewater treatment practices and promote large-scale CO2 reduction efforts.
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