Characterization on Silica From Waste Sugarcane Bagasse for Membrane Fabrication

Abstract

The used of additive enhance the surface of the membrane layer and can be choose from various material. Examples of commonly used additive in membrane are Polyethylene glycol, silica oxide, cellulose acetate and Polyvinylpyrrolidone. Silica oxide was proven have ability to minimize the fouling problem hence increase hydrophobic properties of membrane. Silica also can be extracted from rice husk ash, sugarcane bagasse, sorghum vularae seed and kenaf by precipitation method, biodigestion and sol-gel process. Silica extraction from sugarcane bagasse was chosen as the organic additive for membrane formation. In order to investigate the suitability of the material, several characterization test have been conducted. There are thermal, microscopic and spectroscopic analyses. Thermal gravimetric analysis was performed on sugarcane bagasse to determine the amount of silica that can be extracted from it. Results of TGA on sugarcane bagasse show that the peak temperature at 315.70 °C are defined as crystalline melt. After the melt transition, the baseline takings to a slightly lower position than the pre-melt baseline. The post-melt baseline changes slope as the sample begins decomposition while TGA extrapolated onset temperature of 241.56 °C as this sample decomposes. The analysis of microscopic shows that the addition of silica from sugarcane bagasse changed the surface structure of the membrane especially at top layer and sub layer. Sugarcane bagasse show bands for carboxylate (COO-) and hydroxyl (OH-) groups. The availability of negatively charged groups at the surface of sugarcane bagasse shows potential to be used as additive in membrane fabrication.

Synthesis and Biological Evaluation of Some New Dihydropyrimidine Derivatives of Methyl-3-Cyclopropyl-3-Oxo-Propanoate Nucleus

“…[1] The biological activities of some marine alkaloids isolated recently have been attributed to the presence of a dihydropyrimidinone moiety. [2] Dihydropyrimidinethiones have also attracted considerable attention as they appeared of interest to possess wide range of therapeutic activities, antiviral [3] , antibacterial [4] , antitumor [5] , cardiovascular [6] , antiplasmal [7] , anticarcinogenic [8] , Calcium channel modulator [9] , antihypertensive [10] , vasodilator [11] , blood [12] , anti-inflammatory [13] , analgesic [14] , antilukemic [15] . The structure of synthesized compounds were assigned based on Elemental analysis, I.R.…”

Synthesis and Antimicrobial Activity of (2-Methoxy/2-Amino)-6-{4'-[(4'''-Chlorophenyl) (Phenyl) Methyl Amino] Phenyl}-4-Aryl Nicotinonitrile

“…2-Methoxy-3-cyanopyridine and 2-amino-3-cyanopyridine derivatives showed wide range of biological activities like, antiallergic 1 , fungicidal 2 , antidiabetic 3 , anticancer 4 , anti-HIV 5 , antiinflammatory 6 , antitumor 7 , antineoplastic 8 , analgesic 9 , bactericidal 10 , herbicidal 11 , cardiovascular 12 , diuretic 13 , antiamoebic 14 etc. The products of methoxy cyanopyridines (3a-3l) and amino cyanopyridines (4a-4l) have been synthesized and assigned with IR, 1 H-NMR, mass spectral data and elemental analysis.…”

Synthesis and Antimicrobial Activity of (1-Acetyl/1-Phenyl)-3-{4'-[(4'''-Chlorophenyl) (Phenyl) Methyl Amino] Phenyl}-5-Aryl-Pyrazoline

“…Acetyl pyrazolines and phenyl pyrazolines derivatives shows wide range of biological activities like, antiallergic 1 , fungicidal 2 , antidiabetic 3 , antiimplantation 4 , antiinflammatory 5 , antitumor 6 , antineoplastic 7 , analgesic 8 , bactericidal 9 , herbicidal 10 , cardiovascular 11 , diuretic 12 , antiamoebic 13 etc. In view of getting to synthesized acetyl pyrazoline and phenyl pyrazoline derivatives.…”