I would pick up samples and filter the air, and then try to use the atomic absorption spectrometry method, tu calculate what? and how much? of heavy metals we have.

First, you would need to collect aerosol samples on a filter using a suitable sampling system. Then, you should perform an acid digestion of the filter (using acid mixtures such as HCl+HNO3, HCl+HNO3+HF, etc.) either using an open hot-plate setup or a microwave assisted digestion system in order to extract metals. Lastly, you can quantify the metals using AAS, ICP-MS, ICP-OES, etc. If you have access to an XRF system (EDXRF or WDXRF), you can perform a non-destructive analysis of metals directly from the filter. However, in terms of sensitivity and accuracy, ICP-MS would give you the best results.  

thanks

thank you very mutch for this Information

Leveraging environmental education to achieve national sustainability builds capacity among key stakeholders for adopting practices to improve agricultural productivity and deliver higher quality ecosystem services.

Chapter Leveraging Environmental Education for Achieving Sustainability