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Chowdhury, Z.Z. and Khalid, K. and Ahmad, A.A. and Khan, R.A. and Zain, Sharifuddin Md (2012) Application of response surface methodology (Rsm) for optimizing production condition for removalof Pb (Ii) and Cu (Ii) onto kenaf fiber based activated carbon. Research Journal of Applied Sciences, Engineering and Technology, 4 (5). pp. 458-465. ISSN 20407459,
Chowdhury, Z.Z. and Arami-Niya, A. and Ahmad, A.A. and Islam, M.S. and Khan, R.A. and Zain, Sharifuddin Md (2011) Application of central composite design for preparation of kenaf fiber based activated carbon for adsorption of manganese (II) ion. International Journal of Physical Sciences, 6 (31). pp. 7191-7202. ISSN 19921950 , DOI https://doi.org/10.5897/IJPS11.1510.
