Gulnaziya Issabayeva and  Mohamed Kheireddine Aroua,  Removal of Copper and Zinc Ions onto Biomodified Palm Shell Activated Carbon.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2011, vol. 52(4). 276 - 279
    [viewed 28 January 2020]. Available from: https://publications.waset.org/pdf/5840.