Nitrophenol isomer emissions from typical diesel engines equipped with multi-stage aftertreatment systems

Key Points

• Nitrophenol emissions increase significantly with multi-stage aftertreatment systems, indicating an unexpected pollution source.
• A 36% increase in nitrophenol levels was recorded across various operating conditions.
• Assessment of emissions using standardized testing protocols for diesel engines equipped with aftertreatment systems.
• This highlights potential environmental risks, calling for further studies to evaluate long-term impacts.