1. Al-Masri, M.S., Amin, Y., Al-Akel, B., & Al-Naama, T. (2009). Biosorption of cadmium, lead, and uranium by powder of poplar leaves and branches. Applied Biochemistry and Biotechnology doi10.1007/s12010-009-8568-1.
2. Arshad, M., Zafar, M. N., Younis, S., & Nadeema, R. (2008). The use of neem biomass for the biosorption of zinc from aqueous solutions. Journal of Hazardous Materials, 157, 534–540.
3. ATSDR. (1999). Agency for toxic substances and disease registry, toxicological profiles. Atlanta: Department of Health and Human Services, Public Health Service.
4. Babarinde, N. A. A., Oyesiku, O. O., Babalola, J. O., & Olatunji, J. O. (2008). Isothermal and thermodynamic studies of the biosorption of zinc (II) ions by Calymperes erosum I. Journal of Applied Sciences Research, 4, 716–721.
5. Bailey, S. E., Olin, T. J., Bricka, R. M., & Adrian, D. D. (1999). A review of potentially low-cost sorbents for heavy metals. Water Research, 33, 2469–2479.