Hydrogen Peroxide Photoproduction by A Marine Cyanobacterium Oscillatoria boryana BDU 92181 with Potential Use in Bioremediation

2013 ◽  
Vol 10 (2) ◽  
pp. 929-935 ◽  
Author(s):  
D. Francisca Kalavathi ◽  
G. Subramanian
Keyword(s):  
Hydrogen Peroxide ◽  
Marine Cyanobacterium ◽  
Potential Use

Photocatalytic Treatment of Wastewater From 5–Fluorouracil Manufacturing

1996 ◽  
Vol 118 (1) ◽  
pp. 2-8 ◽  
Author(s):  
M. Anheden ◽  
D. Y. Goswami ◽  
G. Svedberg
Keyword(s):  
Hydrogen Peroxide ◽  
Photocatalytic Oxidation ◽  
Uv Light ◽  
Substantial Reduction ◽  
Reduction Rate ◽  
Reaction Rates ◽  
Batch Experiments ◽  
Cod Reduction ◽  
Potential Use ◽  
Percent Decrease

This paper presents some of the experimental results from a study conducted to demonstrate the potential use of photocatalytic oxidation for decolorization and COD reduction of wastewater from 5–fluorouracil manufacturing. A series of batch experiments, were carried out using diluted solutions of the wastewater with 0.1 percent w/v TiO2. Low pressure mercury lamps were used to simulate the UV part of sunlight. The experiments showed that a complete decolorization and a substantial reduction of COD was achieved within 20 hours with a 20 percent solution. During the reaction period, the pH was noted to decrease considerably, indicating formation of acids. Adding hydrogen peroxide to the solution was found to significantly increase the reaction rates. Adding 2400 ppm of H2O2 gave an 80 percent decrease in color in one hour and a 70-80 percent decrease in COD in 20 hours. The influence of UV-light intensity was also examined. This experiment showed that with a UV-intensity of 15 W/m2, i.e., a cloudy day, the decolorization rate was still considerable, while the COD reduction rate was very low.

Investigation on the potential use of the mimetic peroxidase-catalyzed reaction of hydrogen peroxide and o-hydroxyphenylfluorone in fluorescence analysis

2000 ◽  
Vol 406 (2) ◽  
pp. 209-215 ◽  
Author(s):  
Qiu-ying Chen ◽  
Dong-hui Li ◽  
Qing-zhi Zhu ◽  
Huang-hao Yang ◽  
Hong Zheng ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Fluorescence Analysis ◽  
Potential Use

Bacillus Licheniformis Coated Bioparticles for Hydrogen Peroxide Degradation

2012 ◽  
Vol 59 (1) ◽  
Author(s):  
Wei Kheng Teoh ◽  
Zaharah Ibrahim ◽  
Shafinaz Shahir
Keyword(s):  
Hydrogen Peroxide ◽  
Bacillus Licheniformis ◽  
Extracellular Polymeric Substances ◽  
Exponential Phase ◽  
Bacterial Suspension ◽  
Late Exponential Phase ◽  
Repeated Use ◽  
Biofilm Development ◽  
Potential Use ◽  
Second Use

The potential use of Bacillus licheniformis coated bioparticles for hydrogen peroxide (H2O2) degradation was assessed in this study. Bioparticles were made by mixing zeolite, activated carbon and cement in ratio 20:5:6 for attachment of biofilm. The efficiency of H2O2 degradation was examined in the presence and absence of biofilm (control) on bioparticles. Optimisation of biofilm development (7 and 10 days) and reusability were also investigated for H2O2degradation. Actively growing bacterial suspension (late exponential phase) of B.licheniformis was used in development of pure culture biofilm. The 7–day biofilm coated bioparticles system successfully achieved complete H2O2 degradation within an hour (highest rate = 1.17 % H2O2 degraded per minute) while the control showed no significant H2O2 degradation. After repeated use of biofilm coated bioparticles, the rate of H2O2 degradation declined to 0.654 % H2O2degraded per minute, and second use, the rate of H2O2 degradation was 0.166 % H2O2 degraded per minute. Field Emission Scanning Electron Microscope (FESEM) images of the biofilm coated bioparticles showed the attachment of cells and formation of extracellular polymeric substances (EPS), whereas the control showed no biofilm formed.

The potential use of hydrogen peroxide in water well rehabilitation

2009 ◽  
Vol 23 (1) ◽  
pp. 69-74 ◽  
Author(s):  
F. C. Brassington ◽  
J. P. Whitter ◽  
R. A. Macdonald ◽  
J. Dixon
Keyword(s):  
Hydrogen Peroxide ◽  
Water Well ◽  
Well Rehabilitation ◽  
Potential Use

scholarly journals Vapor Phase Hydrogen Peroxide Inhibits Postharvest Decay of Table Grapes

HortScience ◽  
1991 ◽  
Vol 26 (12) ◽  
pp. 1512-1514 ◽  
Author(s):  
Charles F. Forney ◽  
Roger E. Rij ◽  
Ricardo Denis-Arrue ◽  
Joseph L. Smilanick
Keyword(s):  
Hydrogen Peroxide ◽  
Botrytis Cinerea ◽  
Vapor Phase ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Thompson Seedless ◽  
Table Grapes ◽  
Polyethylene Bags ◽  
Solids Content ◽  
Potential Use

The potential use of vapor phase hydrogen peroxide (VPHP) to prevent decay caused by Botrytis cinerea Pers. ex Fr. in table grapes (Vitis vinifera L.) was investigated. `Thompson Seedless' and `Red Globe' grapes, inoculated with Botrytis cinerea spores, were placed in polyethylene bags and flushed for 10 minutes with VPHP generated from a 30% to 35% solution of liquid hydrogen peroxide at 40C. Immediately after treatment, bags were sealed and held at 10C. Vapor phase hydrogen peroxide significantly reduced the number of terminable Botrytis spores on grapes. The number of terminable spores on `Thompson Seedless' and `Red Globe' grapes had been reduced 81% and 62%, respectively, 24 hours following treatment. The incidence of decay on inoculated `Thompson Seedless' and `Red Globe' grapes was reduced 33% and 16%, respectively, after 8 days of storage at 10C compared with control fruit. Vapor phase hydrogen peroxide reduced the decay of noninoculated `Thompson Seedless' and `Red Globe' grapes 73% and 28%, respectively, after 12 days of storage at 10C. Treatment with VPHP did not affect grape color or soluble solids content.

scholarly journals Mineralization of Melanoidin by H₂O₂ Producing Enzymes from Marine Cyanobacteria Oscillatoria boryana BDU 92181

2021 ◽  
Vol 2 (3) ◽  
pp. 28-32
Author(s):  
D. Francisca Kalavathi
Keyword(s):  
Hydrogen Peroxide ◽  
Manganese Peroxidase ◽  
Marine Cyanobacteria ◽  
Marine Cyanobacterium ◽  
Hydrogen Peroxide Production ◽  
Production Of Hydrogen ◽  
Intracellular Enzymes ◽  
Distillery Wastewater ◽  
Mineralizing Activity ◽  
Peroxidase Enzymes

Intracellular enzymes of Oscillatoria boryana BDU 92181 exhibited mineralizing activity on melanoidin, a recalcitrant pigment present in the distillery wastewater. Melanoidin decolourization was postulated to be due to the production of hydrogen peroxide and molecular oxygen released by the cyanobacterium during photosynthesis. The present study was aimed to find out the efficacy of the marine cyanobacterium O. boryana BDU 92181 in producing H2O2 and enzymes involved in hydrogen peroxide production with a view to utilize its potential for decolorization of melanoidin pigment in the distillery effluent. The enzymes involved in the melanoidin degradation have not so far been attempted with cyanobacteria. The results obtained in the present work suggested the activity of the glucose oxidase and Manganese peroxidase enzymes in a marine cyanobacterium Oscillatoria boryana BDU 92181 and whose activity was found to be enhanced in the presence of melanoidin.

scholarly journals Cleaner industrial processes using hydrogen peroxide

2000 ◽  
Vol 72 (7) ◽  
pp. 1289-1304 ◽  
Author(s):  
William R. Sanderson
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Ligands ◽  
Research Progress ◽  
Industrial Processes ◽  
Special Focus ◽  
Titanium Silicalite ◽  
Catalytic Systems ◽  
Inorganic Systems ◽  
Potential Use ◽  
Recent Research Progress

Recent research progress in catalytic systems for potential use with hydrogen peroxide in industrial chemical synthesis is reviewed, with special focus on work published in the last five years. The main types of chemistry employed are critically appraised regarding their suitability for industrial exploitation. The most significant catalyst types are discussed in terms of the positive features identified to date, and the obstacles yet to be surmounted in order to become more widely adopted. It is believed that fully inorganic systems have more scope for commercialization than those containing organic ligands or supports, however robust. Critical targets are larger-pore analogs of titanium silicalite TS-1, more exploration of smectite-based materials, effective immobilization of activated metal peroxo systems, and improvements in design and manipulation of polyoxometallate compounds. Cooperation between branches of chemistry that have not traditionally worked closely together is advocated.

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