Umi Fazara Md Ali
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Preferred name
Umi Fazara Md Ali
Official Name
Umi Fazara, Md Ali
Alternative Name
Ali, Umi Fazara Md
Md. Ali, Umi Fazara
Umi Fazara, M. A.
Main Affiliation
Scopus Author ID
57195513638
Researcher ID
AAU-4840-2020

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Adsorption of 4-Nitrophenol from wastewater using Sea Mango (Cerbera odollam) based Activated Carbon

2020-04-30 , Zufarhana Zulkurnai N. , Nor Wahidatul Azura Zainon Najib , Umi Fazara Md Ali , Ru Shien T.

The presence of phenols and phenolic compounds in water and wastewater has gained great public attention and it is one of the most frequent pollutants in wastewater. In this study, the adsorption of 4-Nitrophenol from wastewater using activated carbon prepared from the non-edible Sea Mango (Cerbera odollam) fruit was investigated. The Sea Mango Activated Carbon (SMAC) was prepared through a physicochemical activation which consists of H3PO4 impregnation and followed by CO2 gasification. The influences of process variables represented by solution pH value, contact time, initial concentration and adsorbent dosage on removal efficiency of 4-NP onto Sea Mango Raw Material (SMRM) and Sea Mango Activated Carbon (SMAC) were studied. Result showed that the optimum pH for 4-NP removal was at pH 3. The dosage usage required to complete 100 ml of 4-NP on SMRM and SMAC was 1.0 g. Batch studies were performed to evaluate the adsorption process, and it was found that the Freundlich isotherm effectively fits the experimental data for the adsorbates better than the Langmuir model with the highest adsorption capacity 158.730 mg/g of 4-nitrophenol on SMAC. It was found that 70.49% and 97.98% of 4-NP was adsorbed onto SMRM and SMAC, respectively, at an initial concentration of 20 mg/L.

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Optimization of Nickel Electrowinning from Simulated Watts Bath of Electronics Industrial Waste

2023-01-01 , Zulkurnai N.Z. , Hua Y.M. , Umi Fazara Md Ali , Mohd Irfan Hatim Mohamed Dzahir , Naimah Ibrahim , Zuki F.M.

Plating process now has been widely used in the electronics industries for corrosion resistance purpose. One of favorable solution used in nickel-plating process is Watts Bath solution. After several duration of time, the used Watts Bath must be discarded. Due to high amount of nickel concentration inside the Watts Bath, it has been considered as a schedule waste and need a proper disposal process which is expensive. One of reliable methods to dispose and recover nickel from the Watts Bath is by using electrowinning process. The aims of this study are to determine concentration of Watts Bath and to optimize the electrowinning process by using Box-Bhenken Design from Simulated Watts Bath of Electronics Industrial Waste. During this study, the electrolyte concentration, potential applied and contact time were optimized, and the surface morphology of nickel deposited also has been studied. From the result, the concentration of Watts Bath solution is 153 g/L and the removal of 75.04% was obtained under optimized condition which were 0.4 M of electrolyte concentration, 0.4 V of potential applied, and 60 min of contact time.

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Impact of Power Supply on Electro-Precipitation of Nickel Hydroxide from Industrial Electronic Waste

2023-01-01 , Huzairy Hassan , Mismisuraya Meor Ahmad , Hui G.X. , Sabri M.S.A.M. , Ismail M. , Umi Fazara Md Ali

Nickel is a silvery-white metal that is in high demand for a variety of commercial applications due to its ability to withstand high temperatures and corrosive environments. However, the widespread use of nickel compounds in many applications has resulted serious environmental pollutions if they are not properly treated before discharging. The electro-precipitation technique for depositing nickel from industrial waste has become one of the most favorable treatment methods because of its simplicity and low environmental requirements. In this study, the efficiency of nickel deposition from industrial electronic waste with relation to power supply variation (5A and 10A) was explored using various parameters such as electrode type and reaction time. The experiments were conducted in a 500 mL batch reactor with dual electrodes: aluminum (Al) as and stainless-steel (SS) as the anode and the cathode. The results show that the optimum condition of electro-precipitation process of nickel removal efficiency of 99.9% was obtained at 5 A, for 45 min. This research could pave the way for a low-power treatment of industrial nickel wastes.

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