http://nopr.niscair.res.in/handle/123456789/1097 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/1287 Title: Book Review <br/> <br/>Abstract: Groundwater Management in India Reviewer: Dr P D Tyagi <br/> <br/>Page(s): 586 http://nopr.niscair.res.in/handle/123456789/1286 Title: Breakthrough behavior of sulphur mustard vapor on activated carbon <br/> <br/>Authors: Prasad, G K; Mahato, T H; Ganesan, K; Singh, B <br/> <br/>Abstract: Active carbon (surface area, 1250 m²/g) was used to study vapor breakthrough behavior of sulphur mustard (2, 2’- dichlorodiethyl sulphide). Effect of length of carbon bed on vapor breakthrough time has been examined. Rate constant (kv) is found to increase while kinetic saturation capacity (We) is invariable with increase in airflow rate. Both kv and Wℯ decrease with the increase of temperature, however, no significant effect on Wℯ and kv was observed due to concentration change (0.3- 0.6 mg/l). Values of kinetic saturation capacity are used to predict service lives/breakthrough times of carbon beds (when used in filtration systems). <br/> <br/>Page(s): 582-585 http://nopr.niscair.res.in/handle/123456789/1285 Title: Arsenic biosorption by mucilaginous seeds of Hyptis suaveolens (L.) Poit <br/> <br/>Authors: Mandal, Santi Mohan; Mondal, Keshab C; Dey, Satyahari; Pati, Bikas Ranjan <br/> <br/>Abstract: Hyptis suaveolens seeds could serve as natural immobilized source of agriculturally based polysaccharide. Maximum adsorption capacity (6 gl⁻¹) of the seeds for arsenic adsorption has been found at pH 3.5 - 4.5. Among the tested interfering common metal ions, Ca⁺⁺, Mg⁺⁺ and Cl⁻ decreased adsorption rate about 48%, 54% and 30% respectively, whereas Zn⁺⁺ and Co⁺⁺ ions have no significant effect. Adsorption isotherm studies revealed a better correlation with Langmuir isotherm plot. <br/> <br/>Page(s): 577-581 http://nopr.niscair.res.in/handle/123456789/1284 Title: Temperature and soot formation in a natural gas diffusion flame <br/> <br/>Authors: Ofodu, J C; Hart, H I <br/> <br/>Abstract: Study presents temperature and soot formation profile within a natural gas diffusion flame under the equivalence ratios of 0.35, 0.90, 1.70 and 2.56. An in-house combustion Test-Rig designed for diffusion flame studies was used for temperature distribution and gravimetric soot mass. The soot was samples with an isokinetic probe insert, from this; a fairly accurate value of the soot number density and volume fraction was computed. There was sharp increases in the line-of-sight flame temperature within the centerline with peak values occurring at some distances of 6, 12, 12 and 9 cm from the burner rim, corresponding to 0.35, 0.90, 1.70 and 2.56 equivalence ratios respectively, after which it decreases gradually. A clear marked reduction was observed in temperature values as the condition of fuel mixture changes from lean to heavy rich. This reduced temperature that was most evident of flame equivalence ratio of 2.56 has been traced to be as a result of high sooty condition imposed by this fuel rich mixture. This condition of soot laden, enhances high rate of heat losses through adverse radiative heat transfer, thereby decreases flame temperature and combustion efficiencies of the parent user device. It was also observed that the gravimetric soot mass profile is much regular in behaviour for the lean mixture flames as it increases with increase in measured temperature values. Contrarily, for a richer mixture of 2.56, it increases with decrease in temperature.j <br/> <br/>Page(s): 570-576