Settleable matter in a highly industrialized area: Chemistry and health risk assessment

Settleable particulate matter (SPM) was collected at two sampling points within an urban area highly affected by nearby industrial activities. Total deposition values up to 386 mg ·m−2·d−1 were registered, the majority of samples exceeding the limit value established in the legislation in force in Spain until 2002 (300 mg·m−2·d−1). Dry deposition values showed high variability (8.6–830.3 mg·m−2·d−1). Forty-one metals and metalloids were analysed in the dry fraction of SPM, the main being Fe and Ca (maximums: 304.4 and 68.6 mg·m−2·d−1, respectively), followed by Al, Mg, Na, K, Mn, Ti, P and Zn. Trace elements like As and Pb reached up to 7.3 and 76.3 μg· m−2·d−1, respectively. Strong correlations (r > 0.90, p-value