Low Wen Pei
@newinti.edu.my
Dr, Department of Civil Engineering, Faculty of Engineering and Quantity Surveying (FEQS)
INTI International University
EDUCATION
2011-2015 : PhD in Civil Engineering (Environmental), Universiti Teknologi Malaysia
2007-2011 : B.Eng. (Hons) in Civil Engineering, Universiti Teknologi Malaysia.
RESEARCH INTERESTS
Major in River water treatment, natural fibres treatment medium, Mass transfer analysis, Kinetic and isotherm studies.
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
H P Lee, Z S Gan, K S Tan, Y K Yong, N Abdul Rahman, W P Low, and A Z Awang
IOP Publishing
Abstract Catalyzed biomass concrete (CBC) is a cutting-edge technology that produces its own voltages when exposed to temperature changes. It is achieved by mixing catalyst and biomass in conventional concrete during fresh state, and the product generates electricity by oxidation. It helps in reducing cement consumption and minimizing environmental effect, yet to produce new renewable energy from concrete itself. Existing studies has proven the voltage effectiveness of CBC but still low in compressive strength, making it not suitable to serve as load carrying component. Hence in this study, a new chemical combination of catalyst in CBC is examined and reported in its voltage and compressive strength performance. Cubes and specimens with catalyst percentage ranging from 5% to 40% were prepared and tested its compressive strength up to 56 days and its voltage performance under three different exposing condition from 0°C to 100°C. The findings show that CBC specimens with such catalyst combination able to produce voltages, where specimens with 40% of catalyst had the highest voltage measurement of 0.443V. While for compressive strength, CBC cubes with 10% of catalyst performed higher than 40%, but the strength captured with new catalyst combination is better that existing study. It is evident that CBC with such catalyst suitable to serve as load bearing component, and at the same time, generating electricity with complete circuit, under temperature different.
Wen-Pei Low, Wen-Jie Lim, Hoong-Pin Lee, and Nurharniza Abdul Rahman
IOP Publishing
Abstract In Malaysia, water pollution due to the various heavy metal contaminants has become a serious issue that needs to be concerned. Among various water treatment methods, the adsorption method has been considered one of the most efficient wastewater treatment techniques. This study was done to find out the adsorption capacity of orange peel (OP) by different pre-treatment in removing copper, chromium, and nickel ion from aqueous. OP powder was divided into three portions, which were untreated OP, pretreated with sodium hydroxide (NaOH) OP, and detergent OP respectively. Each chemical solution that contains copper, chromium and nickel respectively was tested by these three adsorbents. From the experiment, NaOH pretreated OP was found highest performance in removing 85.67% of nickel and 81.55% of copper. While the untreated OP was good in removing 91.2% of chromium. The untreated OP for nickel ions and copper ions, Detergent treated OP for nickel ions and chromium ions were best fitted to Langmuir Isotherm, while untreated OP for chromium ions, detergent treated OP for copper ions and NaOH treated OP for all selected metal ions were best fitted to Freundlich Isotherm. In short, OP can be considered a very good adsorbent choice due to its good adsorption capacity, environment-friendly nature and low-cost characteristics.
Wen-Pei Low, Jia-Min Siow, Hoong-Pin Lee, Nurharniza Abdul Rahman, Euniza Jusli, and Ramadhansyah Putra Jaya
Elsevier BV
Wen-Pei Low, Fung-Lung Chang, and Shwu Ying Loo
Springer Singapore
Wen-Pei Low, Mohd Fadhil Md Din, Fung-Lung Chang, Siti Nur Fatihah Binti Moideen, Yee Yong Lee, and Santhana Krishnan
Desalination Publications
The present study focuses on the usage of natural cellulosic fibers like coconut fibers (CF) and oil palm fibers (OPF) as an organic substrate for biofilm formation in removing pollutants as opposed to numerous studies that utilized non-organic substrates like plastic and synthetic membrane. The corresponding adsorption ability was tested toward the organic matters (OM) removal in the contaminated river water. The experimental results showed that CF and OPF possessed a higher concentration of phenolic and alcoholic hydroxyl groups by hydrogen bonds have led to a thinner extracellular polymeric substance being formed. The rate at which OM is removed for biofilm attached on coconut fiber (BCF) and biofilm attached on oil palm fiber (BOPF) were identified to be 94.07% and 87.01%, respectively. At 3% outflow, the global mass transfer rate BCF and BOPF were 1.01 and 0.84 d–1. Further to that, the internal mass transfer was found to have an effective diffusivity of pollutants to biofilm. Yet, the mass transfer decreases with the decrease of OM concentration in water. Therefore, it is evident that natural cellulosic fibers are highly effective alternative carriers that can be used for biofilm growth in removing excess concentration of OM in river water.
Siti Nur Fatihah Moideen, Mohd Fadhil Md Din, Shahabaldin Rezania, Mohanadoss Ponraj, Azlan Abd Rahman, Low Wen Pei, Zulhilmi Ismail, Shazwin Mat Taib, Yu-You Li, and Daisuke Komori
Elsevier BV
Wen-Pei Low, Mohd Fadhil Md Din, Fung-Lung Chang, Siti Nur Fatihah Binti Moideen, and Yee Yong Lee
Elsevier BV
Mohd Fadhil Md Din, Mohanadoss Ponraj, Wen-Pei Low, Mohamad Ali Fulazzaky, Kenzo Iwao, Ahmad Rahman Songip, Shreeshivadasan Chelliapan, Zulhilmi Ismail, and Mohamad Hidayat Jamal
Wiley
Al Asfar Lake is a shallow wetland and habitat for wildlife and birds in a desert environment. The water of this lake is originated from the drainage water collected by earthen drainage network and discharged into the lake. The purpose of this study was to assess physico- chemical characteristics and some of heavy metals in Al Asfar lake water. The studied parameters are iron, manganese, copper, zinc, cadmium, chromium, lead, pH, electrical conductivity, and nitrate. Forty-five surface water samples were collected in March 2013. The results revealed that the pH ranged from 7.33 to 8.67, electrical conductivity ranged from 8.28 to 11.34 dS/m, and NO(3)(-) ranged from 0.84 to 2.29 mg/L. In addition, heavy metals concentrations in water were found in the following order: Fe > Mn > Cu > Zn > Cd > Cr = Pb. The mean concentrations of heavy metals in surface water of Al Asfar lake ranged from 0.027 to 0.159 ppm, 0.007 to 0.142 ppm, 0.005 to 0.017 ppm, 0.005 to 0.066 ppm, 0.001 to 0.033 ppm, 0 ppm, and 0 ppm for iron, manganese, copper, zinc, cadmium, chromium, and lead, respectively. Moreover, pH, NO(3)(-), Fe, Mn, and Zn concentrations in the surface water of Al Asfar Lake were found to be within the international permissible limits. On the other hand, Cu and Cd concentrations exceeded the international permissible limits. The high level of some parameters of the measured heavy metals could be attributed to the contamination of Al Asfar Lake with discharge water enriched with chemical fertilizers in addition to domestic and industrial effluents.
Wen-Pei Low, Mohd Fadhil Md Din, Mohanadoss Ponraj, Mohamad Ali Fulazzaky, Kenzo Iwao, Ahmad Rahman Songip, and Shreeshivadasan Chelliapan
Informa UK Limited
AbstractA simple fabricated column model of coconut coir was used to adsorb pollutants from polluted river water. This study proposes the application of this model that applied coconut coir to remove organic matter (OM), phosphate (), and ammonia (NH3) present in river Desa Bakti water. A mathematical model is also developed based on the experimental data as a prerequisite analysis to find out the affinity of adsorbent/adsorbate. The obtained mass transfer for OM was faster when compared to NH3 and . Resistance of mass transfer was verified based on the concentration of contaminant which usually depends on its environmental driving forces. The maximum growth rate observed for bacteria is 4.7756 g new cells/g cells·d, which proved that OM in water had contributed as food source for the growth of micro-organisms in the model. Thus, the developed treatment technology using coconut coir is able to be applied for effective adsorption of OM, NH3, and .