Selected Publications 

1.            Wan Ngah, W.S., Teong, L.C., Toh, R.H., Hanafiah, M.A.K.M.,
Comparative study on adsorption and desorption of Cu(II) ions
by three types of chitosan-zeolite composites,
Chemical Engineering Journal,223 (2013) 231-238

2.            Wan Ngah, W.S., Teong, L.C., Wong, C.S., Hanafiah, M.A.K.M., 
Preparation and characterization of chitosan-zeolite composites, 
Journal of Applied Polymer Science, 125 ( 2012) 2417-2425

3.            Wan Ngah, W.S., Teong, L.C., Hanafiah, M.A.K.M.,
Adsorption of dyes and heavy metal ions by chitosan composites:
A review, Carbohydrate Polymers, 83 (2011) 1446-1456

Top 25 Hottest Articles January to December 2014 Full Year (Rank 1st):
http://top25.sciencedirect.com/subject/chemistry/6/
journal/ carbohydrate-polymers/01448617/archive/59/

4.            Ngah, W.S.W., Fatinathan, S., Yosop, N.A., 
Isotherm and kinetic studies on the adsorption of
humic acid onto chitosan-H2SO4 beads,
Desalination, 272 (2011) 293-300

5.            Ngah, W.S.W., Fatinathan, S.,
 Adsorption characterization of Pb(II) and Cu(II) ions
onto chitosan-tripolyphosphate beads:
Kinetic, equilibrium and thermodynamic studies, 
Journal of Environmental Management, 91 (2010) 958-969

6.            Ngah, W.S.W., Ariff, N.F.M., Hashim, A., Hanafiah, M.A.K.M., 
Malachite green adsorption onto chitosan coated bentonite beads:
Isotherms, kinetics and mechanism, , 
Clean – Soil, Air, Water,38 (2010) 394-400

7.            Ngah, W.S.W., Fatinathan, S., Pb(II)
biosorption using chitosan and chitosan derivatives beads:
Equilibrium, ion exchange and mechanism studies, 
Journal of Environmental Sciences, 22 (2010) 338-346

8.            Wan Ngah, W.S., Ariff, N.F.M., Hanafiah, M.A.K.M.,
 Preparation, characterization, and environmental application
of crosslinked chitosan-coated bentonite for tartrazine
adsorption from aqueous solutions, 
Water, Air, and Soil Pollution, 206 (2010) 225-236

9.            Ngah, W.S.W., Hanafiah, M.A.K.M., 
Surface modification of rubber (Hevea brasiliensis) leaves
for the adsorption of copper ions:
Kinetic, thermodynamic and binding mechanisms, 
Journal of Chemical Technology and Biotechnology,
84 (2009) 192-201

10.          Wan Ngah, W.S., Hanafiah, M.A.K.M., 
Adsorption of copper on rubber (Hevea brasiliensis) leaf powder:
Kinetic, equilibrium and thermodynamic studies, 
Biochemical Engineering Journal, 
Biochemical Engineering Journal, 39 (2008) 521-530

11.          Ngah, W.S.W., Fatinathan, S.,
 Adsorption of Cu(II) ions in aqueous solution using chitosan beads,
chitosan-GLA beads and chitosan-alginate beads, 
Chemical Engineering Journal, 143 (2008) 62-72

12.          Wan Ngah, W.S., Hanafiah, M.A.K.M., Yong, S.S., 
Adsorption of humic acid from aqueous solutions on crosslinked
chitosan-epichlorohydrin beads:Kinetics and isotherm studies, 
Colloids and Surfaces B: Biointerfaces, 65 (2008) 18-24

13.          Ngah, W.S.W., Hanafiah, M.A.K.M., 
Biosorption of copper ions from dilute aqueous solutions on
base treatedrubber (Hevea brasiliensis) leaves powder:
kinetics, isotherm, and biosorption mechanisms, 
Journal of Environmental Sciences, 20 (2008) 1168-1176

14.          Wan Ngah, W.S., Hanafiah, M.A.K.M., 
Removal of heavy metal ions from wastewater by
chemically modified plant wastes as adsorbents:
A review, Bioresource Technology, 99 (2008) 3935-3948

Top 25 Hottest Articles January to December 2014 Full Year (Rank 15th):
http://top25.sciencedirect.com/subject/environmental-science/13/journal/bioresource-technology/09608524/archive/59/

15.          Wan Ngah, W.S., Kamari, A., Fatinathan, S., Ng, P.W., 
Adsorption of chromium from aqueous solution using chitosan beads, 
Adsorption, 2006, Adsorption, 12 (2006) 249-257

16.          Ngah, W.S.W., Fatinathan, S., Chitosan flakes and
chitosan-GLA beads for adsorption of p-nitrophenol in aqueous
solution, Colloids and Surfaces A:
Physicochemical and Engineering Aspects,
277 (2006) 214-222

17.          Ngah, W.S.W., Ab Ghani, S., Kamari, A., 
Adsorption behaviour of Fe(II) and Fe(III) ions in aqueous
solution on chitosan and cross-linked chitosan beads,
Bioresource Technology, 96 (2005) 443-450

18.          Wan Ngah, W.S., Kamari, A., Koay, Y.J., 
Equilibrium and kinetics studies of adsorption of copper (II)
on chitosan and chitosan/PVA beads,
 International Journal of Biological Macromolecules,
34 (2004) 155-161

19.          Wan Ngah, W.S., Ab Ghani, S., Hoon, L.L., 
Comparative adsorption of lead(II) on flake and bead-types of chitosan, 
Journal of the Chinese Chemical Society, 49 (2002) 625-628

20.          Wan Ngah, W.S., Endud, C.S., Mayanar, R.,
 Removal of copper(II) ions from aqueous solution onto
chitosan and cross-linked chitosan beads, 
Reactive and Functional Polymers, 50 (2002) 181-190

Top 25 Hottest Articles January to December 2014 Full Year (Rank 4th):
http://top25.sciencedirect.com/subject/chemistry/6/journal/
reactive-and-functional-polymers/13815148/archive/59/

21.          Ngah, W.S.W., Liang, K.H., Adsorption of gold(III) ions onto
chitosan and N-carboxymethyl chitosan: Equilibrium studies,
 Industrial and Engineering Chemistry Research,
38 (1998) 1411-1414

22.          Wan Ngah, W.S., Musa, A., 
Adsorption of humic acid onto chitin and chitosan, 
Journal of Applied Polymer Science,
69 (1998) 2305-2310

23.          Wan Ngah, W.S., Isa, I.M.,
 Comparison study of copper ion adsorption on chitosan,
dowex A-1, and zerolit 225, 
Journal of Applied Polymer Science, 67 (1998) 1067-1070

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