PROFIL PENYELIDIKAN
RESEARCH
PROFILE
Rafeah Wahi
Lecturer in Environmental Engineering
MSc Environmental Engineering (UPM)
BEng Mineral Resources Engineering (USM)
wrafeah@frst.unimas.my
Research
Interest: Waste Utilization Technology
Reutilization
of wastes is important to protect the quality of our environment. At the same
time, it provides solutions for problems in various sectors including
environmental pollution control, agricultural applications, feedstock for
livestock, and energy sources. My research interest is in waste utilization
technologies, with main focuses on the utilization of agrowastes and sewage
sludge.
My
current research activities are mainly on the development of sorbent from
agricultural waste via chemical modification and filter design for the removal
of oil, colour and other contaminants in oily wastewater.
Another
area of interest is the design and application of microwave pyrolysis technique
for conversion of agrowastes for instance sago, palm oil and wood wastes into clean and environmentally acceptable fuel material. Investigation
on the chemical compounds in the microwave-induced fuel is also of my interest.
My research work also involves the preparation of various types of
adsorbents for removing contaminants and heavy metal from wastewater. Used are
the raw and chemically treated agrowastes, and again the application of
microwave technology for rapid and efficient carbonization of these wastes
prior chemical modification during adsorbent preparation is studied. The
possible utilization of used adsorbents as chemical feedstock is also studied.
In addition, studies on the use of agrowastes for agricultural
applications are also conducted, in particular, the composting of agrowastes
and their effects on plant growth. Other researches are on the determination of
pollutants including heavy metals in wastewater and aquatic organism.
Selected publications:
Journal Publications
Wahi, R., Ngaini, Z., Chuah, L.A., Nourouzi, M.M. &Choong, T.S.Y. (2014). Esterification of M. sagu bark as an adsorbent for removal of emulsified oil. Journal of Environmental Chemical Engineering 2 (2014): 324-331.
Wahi, R., Chuah, L.A. Choong, T.S.Y., Ngaini, Z., & Nourouzi, M.M. (2013). Oil removal from aqueous state by natural fibrous sorbent: An overview. Separation and Purification Technology, 113: 51-63.
Aziz, S.M.A., Wahi, R., Ngaini, Z., & Hamdan, S. (2013). Bio-oils from microwave pyrolysis of agricultural wastes. Fuel Processing Technology, 106: 744-750.
Wahi, R., & Senghie, H. (2011). The use of microwave
derived activated carbon for removal of heavy metal in aqueous solution.
Journal of Science and Technology, 3(1): 97-108.
Wahi, R., Kanakaraju, D., & Yusof, N.A. (2010).
Preliminary study on zinc removal from aqueous solution by sago wastes. Global
Journal of Environmental Research, 4(2): 127-134.
Wahi, R., Ngaini,
Z., & Jok, V. U. (2009). Removal of mercury, lead and copper from aqueous
solution by activated carbon from empty fruit bunch. World Applied Sciences Journal , 5 (Special Issue for Environment), 84-91.
Kanakaraju,
D., Daud, R., Wahi, R. (2009). Preliminary study on accumulation and depuration
of copper, zinc and lead in tilapia (Oreochromis mossambicus) under laboratory
conditions. Journal of Sustainability Science and Management, 4(2), 44-52.
Wahi, R.,
Idris, A., Mohd Salleh, M.A., & Khalid, K. (2006). Low-temperature microwave
pyrolysis of sewage sludge for conversion as fuel material.
International Journal of Engineering and Technology, 3(1), 132-138.
Book Section
Abdul
Aziz, S. M., Wahi, R., Hamdan, S., & Ngaini, Z. (2009). Thermochemical
properties of palm oil, sago and wood wastes and microwave pyrolysis study. In
Z. Ngaini, D. Kanakaraju, & K. Mustafa (Eds.), Chemistry Fundamentals and Applications (pp. 30-37). Kuching:
Perpustakaan Negara Malaysia. ISBN 978-967-5418-02-0
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