Erratum to: Environ Earth Sci DOI 10.1007/s12665-011-1131-8

Unfortunately, the affiliation of the first and third author was incorrect.

The correct information is given below:

K. Pazand · Y. Ghanbari

Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Hesarak Blvd, Poonak Sq., Tehran, Iran.