The guidance document on best available techniques for controlling emissions of heavy metals and their compounds from the source categories listed in annex II of the Protocol on heavy metals addresses the control options for the heavy metals cadmium, lead and mercury. It aims to provide guidance on identifying best available techniques for stationary sources to enable Parties to the Convention on Long-Range Transboundary Air Pollution to reduce their emissions in order to meet their obligations under the Protocol on Heavy Metals.

The main emission sources, their specific control techniques and reduction efficiencies as well as the related costs, are specified by sector where available.

https://www.unece.org/fileadmin/DAM/env/documents/2012/EB/ECE_EB.AIR_116_E.pdf