1. Adepoju MO, Adekoya JA (2014) Heavy metal distribution and assessment in stream sediments of River Orle, southwestern Nigeria. Arab J Geosci 7:743–756
2. Al-Hobaib AS, Al-Jaseem KQ, Baioumy HM, Ahmed AH (2012) Environmental impact assessment inside and around Mahd Adh Dhahab gold mine, Saudi Arabia. Arab J Geosci 4:199–205
3. Alkorta I, Hernandez-Alica J, Becerril JM, Amezaga I, Albizu I, Garbisu C (2004) Recent findings on the phytoremediation of soils contaminated with environmentally toxic heavy metals and metalloids such as zinc, cadmium, lead and arsenic. Rev Environ Sci Bio/Tech 3:71–90
4. Allen SE, Grimshaw HM, Rowland AP (1986) Chemical analysis. In: Moore PD, Chapman SB (eds) Methods in plant ecology. Blackwell Scientific, London
5. Almasoud FI, Usman AR, Al-Farraj AS (2014) Heavy metals in the soils of the Arabian Gulf coast affected by industrial activities: analysis and assessment using enrichment factor and multivariate analysis. Arab J Geosci. doi: 10.1007/s12517-014-1298-x