Abdul Haqi Ibrahim
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Preferred name
Abdul Haqi Ibrahim
Official Name
Ibrahim, Abdul Haqi
Alternative Name
Ibrahim, A H
Main Affiliation
Water Research and Environmental Sustainable Growth (WAREG)
Scopus Author ID
36617479700

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Hybrid system of photocatalytic fuel cell and Fenton process for electricity generation and degradation of Reactive Black 5

2017-01-01 , Noradiba Nordin , Ho Li Ngee , Ong Soon An , Abdul Haqi Ibrahim , Wong Yee Shian , Lee Sin Li , Oon Yoong Sin , Oon Yoong Ling

A novel hybrid system composed of a photocatalytic fuel cell (PFC) and Fenton reactor was developed with the aim to degrade the azo dye Reactive Black 5 (RB5) and generate electricity. Compared to previously established system of bioelectro-Fenton system, microbial fuel cell (MFC) system has significant challenge in the development and operation system. Therefore, PFC is used instead of MFC to generate electrons for the Fenton system. The effect of azo dye (RB5) on each PFC and Fenton reactor was investigated. The experimental results showed that maximum power output was achieved in the absence of dye in the Fenton reactor of this hybrid system. Furthermore, higher degradation efficiency of RB5 could also be observed in the PFC reactor in this hybrid system.

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Reactive Green 19 degradation using O3/S2 O8(2-) process: Intermediates and proposed degradation pathway

2022-01-01 , Mohd Razali N.A. , Che Zulzikrami Azner Abidin , Ong Soon An , Fahmi Muhammad Ridwan , Abdul Haqi Ibrahim , Siti Nasuha Sabri , Kow Su Huan , Safya Abdul Malik

The massive drawbacks of conventional wastewater treatment have led to a demand investigation about new advanced wastewater treatment technology. The issue can be addressed via advanced oxidation processes (AOPs) as witnessed recently. Therefore, the objective of this study was to investigate the performance of ozone/persulfate ((Formula presented.)) process to assess its use as potential degradation of diazo dye which is Reactive Green 19 (RG19). In this work, efficiency, color, and COD removal were investigated over a range of initial pH, persulfate concentration and initial concentration of RG19. The amount of sodium persulfate ((Formula presented.)) was varied at different levels (20–100 mM) relative to precursor radical to assess the optimum usage of persulfate concentration for RG19 degradation. Evidence that RG19 could degrade efficiently had occurred at 100 mg/L, initial pH 9, 60 mM persulfate concentration was identified by FTIR and GC/MS analysis. The results revealed that RG19 could achieve complete decolorization easily as compared to mineralization. In addition, RG19 degradation pathway gave the best representation of level degradation. The GC/MS and FTIR results exhibited the proposed RG19 degradation pathway that involved the characteristic of sulfonic group, (Formula presented.) accompanied with (Formula presented.) became as an indicator of their structure broken down one by one. The degradation products such as oxalic acid, formic acids and others were analyzed and finally converted to carbon dioxide and water. The diazo dye structure itself aided with (Formula presented.) has its superior characteristic as an aid for the efficient degradation process.

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Peat soil for synthetic acid mine drainage treatment: Characteristic study

2020-12-29 , Halim, Mohd Syazwan Mohd , Abdul Haqi Ibrahim , Tengku Nuraiti Tengku Izhar , Ismail S. , Mohamed Jaafar Z.F.

Acid Mine Drainage (AMD) is an untreated outflow of acidic water from metal or coal mines. Improper treatment of the harmful effluent causes major environmental concern and remains as an unsolved problem for mining operators worldwide. The untreated AMD contains high concentration of several heavy metals despite low pH level. Iron (Fe) is most dominant element of heavy metal spotted in the AMD water and must be filtered and treated before being released to open water bodies. Current practises by the industries adopted two categories of AMD treatment methods, namely active and passive treatments. Passive treatment method was adopted into this study by using successive alkalinity producing system (SAPS) to reduce Fe concentration in the AMD. Strict regulations by mine operators to acquire on-site AMD, led to use of synthetic AMD. Peat soil was introduced as organic substrate treatment media, as compared to common materials used such as mushroom spent, wood shaving and animal manure. In this research the peat soil was characterized and its effectiveness to filter the Fe content was assessed using laboratory scale studies. Prior to the test, the natural peat soil was analyzed via Scanning Electron Microscopy (SEM) analysis, Energy Dispersive X-Ray (EDX) analysis and carbon-hydrogen-nitrogen-sulphur (CHNS) element analysis. After going through laboratory tests, the peat soil residues were assessed through SEM-EDX analysis to determine the trapped Fe content. The natural peat soil does not contain any Fe substance. However, the analyzed peat soil residues showed that, approximately one to four percent of the Fe were found in the peat soil residues. The use of the peat soil for the AMD treatment in SAPS method is applicable and can be used as alternative organic substrate for treatment media.

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Physial properties of nanocellulose extracted from empty fruit bunch

2020-12-29 , Abdul Haqi Ibrahim , Muhammad Faiq Abdullah , Sam Sung Ting

The high content of cellulose in lignocellulosic waste can be further utilized to produce nanocellulose (NCC). Conventional method of dissolving lignocellulosic waste in acid solvent is detrimental to the environment. Thus, a new method for utililizing lignocellulosic waste using environmental friendly solvent should be developed. NCC can be produced by dissolution of palm oil empty fruit bunch (EFB) in green solvent, natural deep eutectic solvent (NADES). In this study, palm oil EFB was used to produce NCC by dissolving in NADES and analysed for its characterization. Atomic force microscope (AFM) and transmission electron microscope (TEM) were used to evaluate the NCC’s morphology and dimension. Under AFM analysis, the average height of NCC produced was 15.574±3.658 nm while the obtained diameter is 53.179±24.237 nm. Using TEM analysis, the NCC produced was a needle-like particles with average diameter of 17.842 ± 2.859 nm, while the length is 185.486 ± 91.776 nm. Based on TGA results, NCC produced has a thermal stability at 224 °C. From the results obtained, the dissolution of cellulose in NADES is able to produce nanocellulose with similar properties as nanocellulose produced using conventional method.

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Iron removal efficiency in synthetic Acid Mine Drainage (AMD) treatment using peat soil

2022-01-01 , Mohd Syazwan Mohd Halim , Abdul Haqi Ibrahim , Tengku Nuraiti Tengku Izhar , Suhaina Ismail , Ku Esyra Hani Ku Ishak , Moncea Andreea

Acid mine drainage (AMD) formation is due to the sulfide minerals reaction either chemically or biologically when exposed to atmospheric conditions. The AMD formation often occurred in the region involved with anthropogenic activities, including mining, agricultural plantation, urban development and logging. Treatment of AMD is a challenging part of most mining operations around the world. Selection of method treatment is crucial depending on the area’s geological, mineralogical, topography and AMD characteristic. There are two types of method treatment; active and passive treatment method. In this study, passive treatment method was adopted; which is successive alkalinity producing system (SAPS). The study aims to analyze effect of variable parameters on iron (Fe) concentration and propose optimum operating condition for AMD treatment. Peat soil and limestone aggregate was used as treatment media in treatment tank. Synthetic AMD was formulated using sulphuric acid (H2SO4) and iron sulfate (FeSO4) to represent actual AMD. Once the synthetic AMD was introduced, water samples were collected and analyzed using UV–Vis test after 6 to 48 h’ retention time. Based on the analysis, the proposed methodology has successfully reduced more than 85% iron content only after 6 h of retention time. The maximum Fe removal percentage recorded was 95%, using the higher peat soil depth configuration. The statistical analysis results show that the optimum operating condition for SAPS with high Fe removal is using high peat soil depth. Experiments with higher peat soil depth provide satisfactory results in treating the high initial Fe concentration regardless of the retention time for the AMD treatment.

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Influence of leachate matrix on oxidation performance of ozonation and aops

2022-12-15 , Kow Su Huan , Fahmi Muhammad Ridwan , Che Zulzikrami Azner Abidin , Najihah Abdul Rashid , Naimah Ibrahim , Abdul Haqi Ibrahim , Ong Soon An , Wikurendra E.A. , Handayani D.

Landfill leachate is a critical environmental issue that should be adequately treated to prevent it from spreading to the environment. This study explored the influence of raw leachate matrix and treated leachate matrix on O3, O3/H2O2, and O3/PS performance. O3 and AOPs were conducted in a laboratory-scale batch reactor. The findings showed the degradation of p-cresol, COD, and humic substances was much slower in treated leachate matrix than in raw leachate matrix. However, color was found easier to remove in treated leachate. The results revealed a synergic effect between molecular O3 and dissolved organic matter in the raw leachate as the O3 performance was enhanced in the presence of raw leachate matrix, except for color removal. The highest degradation of more than 90% was achieved in O3 /H2 O2 to remove COD, p-cresol, and humic substances, although it is the most affected by the leachate matrix. This study provides vital insight into the notable performance of O3 /PS in color removal regardless of the influence of leachate matrix, suggesting that the sulfate radical-induced oxidation outperformed O3 and O3 /H2 O2 in reducing nitrogen-containing compounds.

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Photocatalytic fuel cell based on zinc oxide loaded carbon plate photoanode for simultaneous photocatalytic degradation of azo dyes and electricity generation

2020-01-01 , Ong Y.P. , Ho L.N. , Ong S.A. , Banjuraizah Johar , Abdul Haqi Ibrahim

Photocatalytic fuel cell (PFC) is promising to own its synchronous degradation of organic pollutants with electricity generation under illumination of light. The oxidation and reduction process promote the conversion of chemical energy in the pollutants into electrical energy. In this study, PFC is driven by the electrode reactions between the zinc oxide loaded carbon plate (ZnO/C) photoanode and carbon plate cathode under irradiation of UVA light. The ZnO/C photoanode was successfully fabricated by using simple ultrasonication-annealed method and investigated by XRD, SEM and EDX. To investigate the capability of the PFC, reactive red 120 (RR120), congo red (CR) and acid orange 7 (AO7) are employed well compared among themselves. The results indicated that the molecular structure of azo dyes with different adsorption of light by dye itself, number of azo bonds and sulfonic groups can be the crucial factors of decolorization in the PFC. The photocatalytic fuel cell with AO7 as sacrificial agent was able to perform 82.43% of decolorization efficiency, a maximum short circuit current (JSC) of 0.0017 mA cm-2 and maximum power density (Pmax) of 0.0886 µW cm -2.

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Assessment of heavy metal pollution in sediments and in Phragmites Australis from Argeş River

2022-01-01 , Marcu, Ecaterina , Deák, György , Ciobotaru Irina-Elena , Burlacu, Iasmina-Florina , Tociu, Carmen , Abdul Haqi Ibrahim

There are several species of macrophyte which have the ability to absorb heavy metals from water and, therefore, are used to retain and remove them. In the present paper, the concentrations of heavy metals (Zn, Cu, Ni, Cd, Pb and Cr) were investigated in sediment samples from the Argeș River and their potential transfer from sediments to Phragmites australis was evaluated. The extent of sediment pollution with heavy metals and the potential risk to the aquatic environment were estimated based on the following indexes: bioaccumulation, geoaccumulation, ecological risk, translocation, contamination, etc. The metals concentrations in the analyzed sediments were, generally, below the limits of national legislation.

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The effect of iron doping on ZnO catalyst on dye removal efficiency

2020-06-10 , Tzewei T. , Abdul Haqi Ibrahim , Che Zulzikrami Azner Abidin , Fahmi Muhammad Ridwan

Dyes often being use in many manufacturing processes. Hence, the wastewater resulted from the manufacturing process contain colour which need to be removed before being emitted into any water bodies. Photocatalysis is a method which effectively treating wastewater using photocatalyst. ZnO is an example of semiconductor material which is use as a photocatalyst in the treatment method. Doping with transition metals can improve its properties to maximize its photocatalytic efficiency. In this study, the effect of zinc oxide (ZnO) and zinc oxide doped Fe (ZnO/Fe) photocatalyst for dye removal efficiency were investigated. The photocatalysts were successfully synthesized through sol-gel method and characterized by SEM, FTIR and EDX. The photocatalytic efficiency of ZnO and ZnO/Fe was studied by degrading methylene blue (MB) under the exposure of 3 hours of sunlight with varies operational condition. Optimal photocatalytic efficiency operating parameters were performed by Design Expert 10 using the Response Surface Method (RSM). ZnO appeared as regular shape compared to ZnO/Fe which most of the particles had clumped together. The removal efficiency of MB was increase when the dosage of catalyst increased. However, once the optimum dosage of catalyst exceeded, the removal efficiency of MB reduced. During the experiment, 30 mg of ZnO was capable to remove 90% of MB from the solution. When while, ZnO/Fe exhibited better result as it could remove up to 95% of MB using only 10 mg of ZnO/Fe during the treatment. It can be concluded that doping the ZnO with Fe could improve the catalytic ability of ZnO to degrade MB in wastewater.

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Preliminary screening oxidative degradation methyl orange using ozone/ persulfate

2018 , Nur Aqilah Razali , Che Zulzikrami Azner Abidin , Ong Soon An , Fahmi Muhammad Ridwan , Abdul Haqi Ibrahim , Siti Nasuha Sabri , Su Huan Kow

The present study focusing on the performances of advanced oxidation process by using ozonation method towards Methyl Orange based on the efficiency of colour removal and Chemical Oxygen Demand (COD) removal. Factorial design with response surface methodology (RSM) was used to evaluate the interaction between operational conditions, such as pH, initial concentration, contact time and persulfate dosage to obtain the optimum range conditions using a semi-batch reactor. The range of independent variables investigated were pH (3-11), initial concentration (100-500mg/L), contact time (10-50min) and persulfate dosage (20-100mM) while the response variables were colour removal and COD removal of Methyl Orange. The experimental results and statistical analysis showed all the parameters were significant. Thus, from this findings, optimization of operational conditions that had been suggested from the ozone/persulfate RSM analysis were (pH 3, 100 mg/L, 50min, 60mM) that would be produced 99% Colour Removal and 80% COD Removal and help in promoting an efficient ozonation process. The effect list data that showed the most contributed effects to increase the percentages of colour removal were pH and persulfate dosage whereas the contact time and initial concentration had the highest positive effects on the COD removal. Other than that, the interaction between pH, contact time and persulfate dosage were found to be the most influencing interaction. Therefore the least influencing interaction was interaction between persulfate dosage and pH. In this study, the correlation coefficient value R2 for colour removal and COD removal of Methyl Orange were R2= 0.9976 and R2= 0.9924 which suggested a good fit of the first-order regression model with the experimental data.

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