Water purification by Copper oxide nanoparticles: effect of initial concentration, adsorbent
dosage, pH and competing ions
Prasanta Kumar Raula#, Rashmi Rekha Devia, Ashim Jyoti Thakurb and Vijay Veera
a
b
#
Defence Research Laboratory, Post Bag No. 2, Tezpur- 784 001, Assam, India.
Department of Chemical Sciences, Tezpur University, Napaam, Tezpur-784028, Assam, India.
corresponding author:
Prasanta Kumar Raul; Email address: prasanta.drdo@gmail.com
Tel.: +91(3712)258836 Extn. 201; Cell: +918399837432
Fax: +91(3712)258534.
Key words: nickel(II), copper(II) oxide nanorod, water, removal, adsorption isotherm.
Abstract:
Adsorption of Ni(II) from aqueous solution using synthesized copper(II) oxide nanoparticle at room temperature was
studied in this work. Firstly, copper (II) oxide nanoparticles had been derived by thermal refluxing technique and
characterized with TEM, BET, XRD, FESEM and FTIR implied that the prepared adsorbent was in nano size with rod
shaped morphology and had excellent adsorption behavior with surface area of 52.11 m2/g. Then removal efficiency of
Ni(II) by CuO nano-rod was investigated with variation of the solution pH, adsorbent dosage, contact time, competing
ions and initial adsorbate (Ni2+) concentration. Maximum removal of Ni(II) was observed with 93.6% and 93.7% from
500 ppb & 1000 ppb initial concentration of nickel at near-neutral pH. The CuO nanorods is very much effective to
remove more than 75% nickel over a wide range of pH in presence of other competing ions like Cd2+, Pb2+, Cr6+, SO42except high conc. of hydroxide ions.. So, CuO nanorod can be used for decontamination of Ni(II) from aqueous
solution in presence of several competing ions with a appreciable regeneracy of the adsorbent.
References:
[1] Z.L. Liu, H.B.Wang, H.Q. Lu, G.H. Du, L. Peng, Y.Q. Du, S.M. Zhang, K.L. Yao, Synthesis and characterization
of ultrafine well-dispersed magnetic nanoparticle, J. Magn. Magn. Mater. 283 (2004) 258–262.
[2] J. Hu, G. Chen, M.C. Lo, Selective removal of heavy metals from industrial wastewater using Maghemite
nanoparticle: performance and mechanism, J. Environ. Eng. 132 (2006) 702–715.
[3] Y.C. Sharma, V. Srivastava, Separation of Ni(II) ions from aqueous solutions by magnetic nanoparticles, J. Chem.
Eng. Data 55 (2010) 1441–1442