Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2014.537.541KhanTaimur IsaMohamed Hasnain ChaudhuriMalay MustafaMuhammad Raza Ul 62014146The aim of the study was to prepare potentially cheaper carbon
for the adsorptive removal of Zinc [Zn(II)] from aqueous solution. The adsorption
capacity of the prepared carbon to remove Zn(II) from aqueous solution was tested
and adsorption mechanism was investigated. Rice husk carbon was prepared by
acidic treatment of rice husk. The Acidically Prepared Rice Husk Carbon (APRHC)
was characterised in terms of surface area, micropore area, micropore volume,
average pore diameter and surface morphology. Adsorption of Zn(II) by APRHC
was examined. The influence of operating parameters, namely, pH, initial concentration,
contact time and adsorbent dose on adsorption of Zn(II) by the APRHC was evaluated.
Batch adsorption tests showed that extent of Zn(II) adsorption depended on initial
concentration, contact time and pH. Equilibrium adsorption was achieved in 60
min, while maximum Zn(II) adsorption occurred at pH 3. Langmuir and Freundlich
isotherms were studied and the equilibrium adsorption data was found to fit
well with the Freundlich isotherm model. Langmuir constants Q° and b were
44 and 0.06 and Freundlich constants Kf and 1/n were 7.31 and 0.38,
respectively. Adsorption of Zn(II) by APRHC followed pseudo-second-order kinetics.
Being a low-cost carbon, APRHC has potential to be used for the adsorption of
Zn(II) from aqueous solution and wastewater in developing countries.]]>ATCDR,19931993Chakraborty, S., S. Chowdhury and P.D. Saha,20118415331541Daffalla, S.B., H. Mukhtar and M.S. Shaharun,20101010601067Depci, T., A.R. Kul and Y. Onal,2012200-202224236EL-Shafey, E.I.,200516381102El-Shafey, E.I.,2010175319327Ghorbani, M., H. Eisazadeh and A.A. Ghoreyshi,201236671Isa, M.H., N. Ibrahim, H. Abdul Aziz, M.N. Adlan, N.H.M. Sabiani, A.A.L. Zinatizadeh and S.R.M. Kutty,2008152662668Jain, C.K.,200146419434Kumar, Y.P., P. King and V.S.R.K. Prasad,2007Ulva fasciata sp.]]>129161166Pitsari, S., E. Tsoufakis and M. Loizidou,20132231830Rahman, I.A. and J. Ismail,19933931934Rahman, I.A., J. Ismail and H. Osman,1997715051509Salim, R., M. Al-Subu, I. Abu-Shqair and H. Braik,200381236242Volesky, B.,1990pp: 3-6pp: 3-6Weber, W.J.,19721972pp: 199-259pp: 199-259