ENHANCED PHOTOCATALYTIC DEGRADATION OF 4-NITROPHENOL USING ACRYONITRILE MODIFIED POLYMER/ZNO NANOCOMPOSITE PHOTODEGRADATION OF 4-NITROPHENOL
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): MUHAMMED M. IBRAHIM , SIRAJO B. LAWAN
Abstract: Factors affecting the degradation efficiency of one of the major persistent organic waste water pollutant 4-nitrophenol such as light source, photocatalyst load, maximum concentration of 4-nitrophenol, pH and period of irradiation are the main focus concern in the present work. Results obtained revealed the maximum photocatalyst loading and pollutant concentration to be 0.75g and 100ppm respectively with a pseudo-first-order decomposition reaction kinetics. The efficiency of 1:2 acryonitrile modified polymer/ZnO nanocomposite was found to be 96.47% after 120mins of exposure period which is higher as compared with the pure ZnO and the ordinary grafted cassava with 91% TOC removal ability. Incorporating of 1:2 acryonitrile modified polymer/ZnO was also found to increase the surfaced area and pore volume of the ZnO matrix thus increasing its porosity and visible light absorption which is the reason for the increased degradation efficiency.
- Publication Date: 03-Aug-2014
- DOI: 10.15224/978-1-63248-004-0-90
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BIOETHANOL PRODUCTION FROM DEACETYLATED BIOMASS AND OXALIC ACID PRETREATMENT WITHOUT DETOXIFICATION
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): JAE-WON LEE , CHANDAN KUNDU
Abstract: Lignocellulosic biomass which contains mainly cellulose, hemicellulose and lignin evaluated for production bioethanol and bio-based chemical. To produce bioethanol from yellow poplar (Liriodendron tulipifera L.), deacetylation was performed using sodium hydroxide (NaOH) solution and analyzed by a response surface methodology (RSM) with two parameters (time and NaOH concentration) to optimize the condition. The highest 7.06 g/L acetic acid was extracted through deacetylation by 0.8 % NaOH for 80 min and further used this condition to prepare deacetylated biomass. The pretreatment were carried out by oxalic acid at different temperatures for 30 min. After pretreatment, solids were separated from hydrolysate by filtration and used to simultaneous saccharification and fermentation (SSF). Acetic acid production significantly decreased in the oxalic acid pretreatment hydrolysate due to deacetylation. The xylan content decreased in the solid fraction after oxalic acid pretreatment with increa
- Publication Date: 03-Aug-2014
- DOI: 10.15224/978-1-63248-004-0-91
- Views: 0
- Downloads: 0