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- 저자 : Goutam Banerjee (검색결과 2 건)
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Ramesh Dod,Goutam Banerjee,S. Saini 한국생물공학회 2012 Biotechnology and Bioprocess Engineering Vol.17 No.4
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 30℃. 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 30℃.
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Butterfly diversity in Kolkata, India: An appraisal for conservation management
Swarnali Mukherjee,Soumyajit Banerjee,Goutam K. Saha,Parthiba Basu,Gautam Aditya 국립중앙과학관 2015 Journal of Asia-Pacific Biodiversity Vol.8 No.3
An appraisal of butterfly species diversity was made using Kolkata, India as a model geographical area. Random sampling of rural, suburban, and urban sites in and around Kolkata metropolis revealed the presence of 96 butterfly species, dominated by Lycaenidae (31.25%) over Nymphalidae (28.13%), Hesperiidae (18.75%), Pieridae (12.50%), and Papilionidae (9.38%). Suburban sites accounted for 96 species, followed by rural (81 species) and urban (53 species) over the study period. The relative abundance of the butterflies varied with the site, month, and family significantly. It is apparent that the urban areas of Kolkata can sustain diverse butterfly species which includes species of requiring conservation effort. Considering the landscape of Kolkata, steps to enhance urban greening should be adopted to maintain butterfly diversity and sustain the ecosystem services derived from them.
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