http://nopr.niscair.res.in/handle/123456789/1092 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/1162 Title: Physicochemical parameters, isotherms, sorption kinetics and column operations for adsorption of copper (II) from wastewater using fly ash <br/> <br/>Authors: Nath, Kaushik; Gor, J P; Shah, P N; Modi, K <br/> <br/>Abstract: The potential of activated fly ash has been investigated for the adsorption of copper (II) dissolved in wastewater. Physico-chemical parameters such as adsorbate concentration, pH, adsorbent dose, temperature, presence of interfering ions etc were optimized by employing batch adsorption technique. Adsorption was endothermic and followed Langmuir and Freundlich isotherms, however, the latter fitted well. Isotherms were used to estimate thermodynamic parameters for the adsorption process. Kinetic data were fitted to the models of intraparticle diffusion, pseudo second order and Lagergren model which followed more closely to the pseudo second order chemisorption model. The regeneration and reusability of the adsorbents were also assessed. Maximum removal of copper (II) was obtained at pH 4 and temperature 50°C (about 98% for adsorbent dose of 20 g/l and 50 mg/l initial feed concentration). <br/> <br/>Page(s): 170-177 Mon, 29 Jan 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/1161 Title: Behaviour of chemically modified bagasse in sorption of rare earth elements <br/> <br/>Authors: Eid, M A; Mahdy, A A; Eid, K A; Hashem, H A; Nada, A M A <br/> <br/>Abstract: Cation exchangers have been prepared by incorporating phosphate, sulphate as well as by the simultaneous incorporation of both phosphate and sulphate groups on the structure of sugar cane bagasse. Phosphosulfonated bagasse had highest uptake efficiency and can be used in column for the preconcentration of this important group of elements. Measurements were carried out using inductively coupled plasma atomic emission spectrometry. <br/> <br/>Page(s): 162-169 Mon, 29 Jan 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/1160 Title: Thermodynamic analysis of strawberry drying process in a cyclone type dryer <br/> <br/>Authors: Akpinar, E Kavak <br/> <br/>Abstract: In this paper, thermodynamic analysis of the thin layer drying process of strawberry are investigated. Drying experiments were conducted at inlet drying air temperatures of 60, 75 and 85°C and at drying air velocities of 0.5, 1 and 1.5 m s⁻¹ in a cyclone type dryer. Using the First Law of Thermodynamics, energy analysis was carried to estimate the ratios of energy utilization. However, exergy analysis was accomplished to determine type and magnitude of exergy losses during the drying process by applying the Second Law of Thermodynamics. Strawberry samples were sufficiently dried between 60-85°C at 0.5, 1 and 1.5 m s⁻¹ of drying air velocity during 12000-33600 sec despite the exergy losses of 0-0.715 kJ s⁻¹. <br/> <br/>Page(s): 152-161 Mon, 29 Jan 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/1159 Title: Effect of storage tank geometry on performance of solar water heater <br/> <br/>Authors: Zahedi, H R; Adam, N M; Sapuan, S M; Ahmad, M M H M <br/> <br/>Abstract: A computer simulation program has been developed to predict the performance of solar thermosyphon domestic water heater. The model has standard configuration of solar collector (2m²) and 150 litres vertical storage tank. Malaysian hot water consumption profile has been used. Increasing the storage tank height above 1.0 m has no significant effect on solar fraction, but the solar fraction is adversely affected, particularly at high set points, if considerably shorter tanks are used. <br/> <br/>Page(s): 146-151 Mon, 29 Jan 2007 22:58:59 GMT