02302nas a2200265   4500008004100000022001400041245013100055210006900186260014500255300001200400490000700412520130500419653001501724653002401739653001501763653002101778653001401799653001301813653001901826653001101845100001601856700002101872700001401893856012901907       2012                        eng d  a1226-837200aAdsorption of methylene blue using green pea peels (Pisum sativum): a cost-effective option for dye-based wastewater treatment0 aAdsorption of methylene blue using green pea peels Pisum sativum  aKOREAN SCIENCE TECHNOLOGY CENTER, \#704 YEOGSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREAbKOREAN SOC BIOTECHNOLOGY & BIOENGINEERINGcAUG  a862-8740 v173 a<p>Methylene blue (MB), a common toxic dye, is largely discharged from dyeing processes for acrylic, nylon, silk, and woolen fabrics in textile industries. While application of conventional removal processes like chemical precipitation, ion exchange, commercial activated carbon adsorption, etc often become cost-prohibitive, the adsorption of MB by abundantly available green pea peel (GPP: Pisum sativum) derived and acid-treated carbon (GPP-AC) has proved to be a cost-attractive option in the present study. The physicochemical and morphological characteristics of GPP-AC were examined with the help of XRD, BET surface area, SEM, and Fourier transform infrared spectrophotometry ((FT-IR) analysis. The influences of such adsorption parameters as initial dye concentration, pH, contact time, adsorbent dosage, agitation speed, particle size, and temperature were evaluated and optimized. The equilibrium contact time for maximum adsorption of MB on to GPPAC was found to be 7 h. The equilibrium data of the adsorption process were modeled by using the Langmuir, Freundlich, Temkin, and Dubinin-Raduskevich (D-R) isotherms. However, the adsorption equilibrium data were best described by the Langmuir Isotherm model, with a maximum adsorption capacity of 163.94 mg MB/g GPPAC at 30A degrees C.</p>10aAdsorption10aDubinin-raduskevich10aFreundlich10agreen peas peels10aIsotherms10aLangmuir10aMethylene blue10aTemkin1 aDod, Ramesh1 aBanerjee, Goutam1 aSaini, S.  uhttps://library.ncl.res.in/content/adsorption-methylene-blue-using-green-pea-peels-pisum-sativum-cost-effective-option-dye-002123nas a2200253   4500008004100000022001400041245011600055210006900171260007300240300001200313490000800325520121300333653002301546653001301569653002201582653002401604653001301628100001701641700001801658700001901676700002601695700002001721856012801741       2012                        eng d  a0304-389400aAlumina supported carbon composite material with exceptionally high defluoridation property from eggshell waste0 aAlumina supported carbon composite material with exceptionally h  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a161-1690 v2373 a<p>A new alumina supported carbon composite material called ``Eggshell Composite'' (EC) was synthesized from eggshell waste as calcium source for selective fluoride adsorption from water. The effect of various synthesis parameters like eggshell (ES): Eggshell membrane (ESM) ratio, aluminium loading, mixing time and calcinations temperature to optimize the synthesis conditions for selective fluoride removal has been studied. It was observed that the synthesis parameters have significant influence on development of EC and in turn on fluoride removal capacity. EC synthesized was characterized for elemental composition, morphology, functionality and textural properties. Results showed that EC obtained from eggshell modified with alumina precursor is more selective and efficient for fluoride removal. Langmuir and Freundlich isotherm were used to obtain ultimate fluoride removal capacity. The calcium and alumina species in EC shows synergistic effect in fluoride adsorption process. Fluoride sorption studies were carried out in synthetic, groundwater and wastewater. EC proved to be a potential, indigenous and economic adsorbent for fluoride removal. (C) 2012 Elsevier B.V. All rights reserved.</p>10aComposite material10aEggshell10aEggshell membrane10aFluoride adsorption10aLangmuir1 aLunge, Sneha1 aThakre, Dilip1 aKamble, Sanjay1 aLabhsetwar, Nitin, K.1 aRayalu, Sadhana  uhttps://library.ncl.res.in/content/alumina-supported-carbon-composite-material-exceptionally-high-defluoridation-property-002339nas a2200277   4500008004100000022001400041245017000055210006900225260000800294300001600302490000700318520139900325653001401724653001901738653001901757653001501776653001701791653001301808653001301821100002301834700001901857700002301876700002201899700002901921856011101950       2023                        eng d  a2190-681500aEtherification of biomass-derived glycerol to oxygenated fuel additives using dodecatungstophosphoric-silica-supported catalyst: characterization and kinetic studies0 aEtherification of biomassderived glycerol to oxygenated fuel add  cNOV  a16285-162950 v133 a<p>
	Commercial biodiesel production is becoming popular due to its sustainability and reduced greenhouse gas emissions in comparison to fossil fuels. Biodiesel production involves the co-generation of crude glycerol that is not directly viable. Valorization of glycerol is essential from techno-economic perspective to achieve goals of circular economy. In this study, the glycerol etherification was carried out using tert-butyl alcohol in presence of dodecatungstophosphoric/silica (DTP/SiO2) catalyst for production of tert-butyl glycerol ethers that can be used as fuel additives. A series of DTP/SiO2 catalysts were prepared with various compositions by impregnating heteropoly acids (HPA, H3PW12O40). The product analysis was performed to monitor mono-, di-, and tri-tert-butyl glycerol ethers. The kinetic studies were conducted based on Langmuir-Hinshelwood model. The rate constants were determined from experimental data by regression analysis. The catalysts were characterized by X-ray diffraction, SEM/EDX, and thermogravimetric analysis. Varying DTP loadings resulted in different catalytic activities. Activation energy (38.23 kJ/mol), activation enthalpy (25.94 kJ/mol), activation entropy (-163.8 J/mol/K), and Gibbs free energy of activation (88.67 kJ/mol) were attained for DTP/SiO2 (20%) catalyst that exhibited the best selectivity for di-tert-butyl glycerol ethers.</p>
10aCatalytic10aetherification10afuel additives10aHinselwood10aImpregnation10akinetics10aLangmuir1 aMagar, Subhash, B.1 aKapoor, Ashish1 aJana, Sumit, Kumar1 aPal, Dan, Bahadur1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/etherification-biomass-derived-glycerol-oxygenated-fuel-additives-using