Nur Syahirah MH - Academia.edu (original) (raw)
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The Institute of Philosophy of the Russian Academy of Sciences
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Papers by Nur Syahirah MH
Separation and Purification Technology
Bacterial strains from the genus Citrobacter are proven to be cultivated effectively in acetate m... more Bacterial strains from the genus Citrobacter are proven to be cultivated effectively in acetate medium to produce chitosan-like bioflocculants with strong flocculation activity. Selected physicochemical characteristics and flocculation behaviour of a novel bioflocculant from Citrobacter youngae GTC 01314 were studied in kaolin suspension, followed by evaluation of its dewatering performance in activated sludge sample. The results confirmed the effectiveness of the bioflocculant in enhancing sludge dewaterability which advocates its potential application in water and wastewater treatment
Journal of environmental chemical engineering, 2021
In this study, a novel soluble chitosan-like bioflocculant (BF), named BF01314, was prepared from... more In this study, a novel soluble chitosan-like bioflocculant (BF), named BF01314, was prepared from the culture supernatant of Citrobacter youngae GTC 01314 for potential application in the treatment of kaolin suspension and activated sludge. The physicochemical characteristics of the BF and its flocculation behavior under the effects of BF concentration, pH and temperature in kaolin suspension were investigated. Results reveal that BF01314 exhibited a chitosan-like infrared spectrum with the presence of the characteristic hydroxyl, amide, and amino groups. The BF demonstrated strong flocculation activities of more than 95% in kaolin suspension within a broad “flocculation window” of BF concentrations (4–120 mg-dry weight/L), pH range of 2–8, and temperature range of 10–95 °C, without significant overdose effect. When applied in the treatment of activated sludge, BF01314 showed significant dewaterability improvement with 62% reduction in capillary suction time and 10.5% increase in ca...
Energies
The rise of carbon dioxide (CO2) levels in the atmosphere emphasises the need for improving the c... more The rise of carbon dioxide (CO2) levels in the atmosphere emphasises the need for improving the current carbon capture and storage (CCS) technology. A conventional absorption method that utilises amine-based solvent is known to cause corrosion to process equipment. The solvent is easily degraded and has high energy requirement for regeneration. Amino acids are suitable candidates to replace traditional alkanolamines attributed to their identical amino functional group. In addition, amino acid salt is a green material due to its extremely low toxicity, low volatility, less corrosive, and high efficiency to capture CO2. Previous studies have shown promising results in CO2 capture using amino acids salts solutions and amino acid ionic liquids. Currently, amino acid solvents are also utilised to enhance the adsorption capacity of solid sorbents. This systematic review is the first to summarise the currently available amino acid-based adsorbents for CO2 capture using PRISMA method. Physi...
Separation and Purification Technology
Bacterial strains from the genus Citrobacter are proven to be cultivated effectively in acetate m... more Bacterial strains from the genus Citrobacter are proven to be cultivated effectively in acetate medium to produce chitosan-like bioflocculants with strong flocculation activity. Selected physicochemical characteristics and flocculation behaviour of a novel bioflocculant from Citrobacter youngae GTC 01314 were studied in kaolin suspension, followed by evaluation of its dewatering performance in activated sludge sample. The results confirmed the effectiveness of the bioflocculant in enhancing sludge dewaterability which advocates its potential application in water and wastewater treatment
Journal of environmental chemical engineering, 2021
In this study, a novel soluble chitosan-like bioflocculant (BF), named BF01314, was prepared from... more In this study, a novel soluble chitosan-like bioflocculant (BF), named BF01314, was prepared from the culture supernatant of Citrobacter youngae GTC 01314 for potential application in the treatment of kaolin suspension and activated sludge. The physicochemical characteristics of the BF and its flocculation behavior under the effects of BF concentration, pH and temperature in kaolin suspension were investigated. Results reveal that BF01314 exhibited a chitosan-like infrared spectrum with the presence of the characteristic hydroxyl, amide, and amino groups. The BF demonstrated strong flocculation activities of more than 95% in kaolin suspension within a broad “flocculation window” of BF concentrations (4–120 mg-dry weight/L), pH range of 2–8, and temperature range of 10–95 °C, without significant overdose effect. When applied in the treatment of activated sludge, BF01314 showed significant dewaterability improvement with 62% reduction in capillary suction time and 10.5% increase in ca...
Energies
The rise of carbon dioxide (CO2) levels in the atmosphere emphasises the need for improving the c... more The rise of carbon dioxide (CO2) levels in the atmosphere emphasises the need for improving the current carbon capture and storage (CCS) technology. A conventional absorption method that utilises amine-based solvent is known to cause corrosion to process equipment. The solvent is easily degraded and has high energy requirement for regeneration. Amino acids are suitable candidates to replace traditional alkanolamines attributed to their identical amino functional group. In addition, amino acid salt is a green material due to its extremely low toxicity, low volatility, less corrosive, and high efficiency to capture CO2. Previous studies have shown promising results in CO2 capture using amino acids salts solutions and amino acid ionic liquids. Currently, amino acid solvents are also utilised to enhance the adsorption capacity of solid sorbents. This systematic review is the first to summarise the currently available amino acid-based adsorbents for CO2 capture using PRISMA method. Physi...