http://nopr.niscpr.res.in/handle/123456789/62494 2026-10-12T06:04:18Z http://nopr.niscpr.res.in/handle/123456789/62508 Title: A review on adsorptive removal study of organic pollutant(s) using activated sorbents from waste contaminated water Authors: Murmu, B M; Behera, S S; Ray, A; Ghosh, D; Das, D; Bindhani, B K; Parhi, P K Abstract: There is a serious environmental concern being encountered for increase in the rate of water pollution occurs by the contamination of several industrial discharges. The key issue of the contamination water is owing to the content of various non degradable toxic components in it which lead to cause life threatening to both plants and animal lives. In particular, the industrial effluent bears substantial amount of waste dyes, pesticides and pharmaceuticals wastes and those are carcinogenic in nature. This review is an attempt to cover the adoption of various activated sorbents including, charcoal, activated carbon, clay materials, organic extracts of the plants and nanomaterials for sorption studies of waste contaminates from the different kinds of waste water. The origin of organic pollutants, their nature, development of numerous activated adsorbents, characteristics properties of the sorbents and their suitable adoption for removal of contaminates is systematically discussed. The significance of the sorption mechanism accomplishing the kinetics, isotherm and thermodynamics on interaction of the adsorbents with organic pollutants are extensively described and reported. Page(s): 589-605 2023-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/62507 Title: Enhanced sequestration of commercial Auramine O dye in a Fenton oxidative decolourization process Authors: Modi, Khyati K; Nath, Kaushik Abstract: The present work investigates the Fenton degradation of commercial Auramine O dye from a model solution through advanced oxidation process (AOP). The effects of initial pH, ferrous ion and H2O2 concentration have been evaluated with respect to the extent of decolourization of the feed solution. A maximum decolourization to the tune of 91.8% is accomplished at a pH of 3.0. The effect of various doses of Fe2+ and H2O2 on the percentage reduction in chemical oxygen demand (COD) is investigated at a constant pH. 84.9% reduction of COD is obtained using a combination of 48 mL/L H2O2 and 6 g/L Fe2+. The gas chromatography-mass spectrometry analysis reveals the presence of toxic non-biodegradable Auramine O dye in the model solution before the Fenton AOP, which is degraded into several compounds including CO2 after 30 min of Fenton AOP. The spectral output from FTIR analysis corroborates the molecular rearrangement during Fenton process with consequent degradation. Page(s): 606-613 2023-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/62506 Title: Preparation of high pure refractory grade magnesium oxide from east coast sea water Authors: Chowdhury, Apurba; Panda, Chitta Ranjan Abstract: Preparation of good quality magnesium oxide from seawater is the most challenging job because the vast majority of undesired impurities come from seawater during the precipitation stage. Hence, the double salt route has been developed as a very unique technique to prepare refractory grade magnesium oxide from seawater. Controlled addition of carrier reagent at the precipitating stage precipitates magnesium as double salt. The double salt is transformed to magnesium carbonate (MgCO3), which after calcination forms magnesium oxide (MgO). The product quality has been established by elemental analysis, PXRD, FTIR, TG/DTG, and FESEM. Commercially available MgCO3 and MgO of HiMedia have also been characterized simultaneously for comparison. The prepared magnesium oxide shows very high purity of 99.75%, which is shown from EDS measurement and PXRD and can be suitable as basic refractory material for industrial purposes. Page(s): 614-622 2023-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/62505 Title: Comprehensive analysis and process simulation of biodiesel production from biomass sources Authors: E, Elavazhagan; A, Sowmiya; Sivalingam, Sivamani Abstract: The present research work entails the process simulation of biodiesel production on a large scale using the ASPEN process simulator. Catalytic transesterification and non-catalytic supercritical mode of transesterification are simulated with experimental results and compared to determine the efficient mode of transesterification under different initial feedstock raw material conditions. It is found that the supercritical method (280℃; 276.4 atm; 42:1 for alcohol and oil ratio) is efficient in terms of cost and product quality for the feedstocks with high Free Fatty Acid (FFA) content. For feedstocks with a negligible amount of FFA, alkali-catalyzed homogeneous transesterification (60-65℃; 4atm; 6:1- alcohol: oil ratio) is efficient in terms of product quality and yield although the cost is similar to that of the supercritical mode of transesterification. Pre-treatment steps like simple esterification and glycerolysis for high FFA-contained feedstocks are studied using the ASPEN simulation to understand better the overall process by which the pre-treatment is carried out. Finally, the combustion characteristics of the biodiesel blend along with n-heptane (a surrogate for Petro-diesel) are studied using the Python scripted Cantera combustion chamber and it is found that the amount of soot and carbon monoxide emission is very less indicating complete and efficient combustion. This simulation study is carried out with the help of DWSIM simulation software. Page(s): 623-633 2023-09-01T00:00:00Z