Chiranjib Bhattacharjee

Jadavpur University

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Ranjana Das

Jadavpur University

Dwaipayan Sen

Shiraz University

Siddhartha Datta

Jadavpur University

Ranjana Chowdhury

Jadavpur University

Arijit Nath

Magyar Agrár- és Élettudományi Egyetem

Santanu Sarkar

Tata Steel (India)

Sudip Chakraborty

University of Calabria

Sangita Bhattacharjee

Lincoln University College

Debasish Sarkar

University of Calcutta

Ankur Sarkar

Jadavpur University

Cooperative Institutions

Jadavpur University

120

University of Calcutta

Indian Institute of Technology Kharagpur

Centre National de la Recherche Scientifique

Council of Scientific and Industrial Research

Consejo Superior de Investigaciones Científicas

Universidade do Porto

National Institute of Technology Durgapur

Universidad de Murcia

Indian Institute of Technology Roorkee

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Optimization of process parameters during photocatalytic degradation of phenol in UV annular reactor

Desalination and Water Treatment (2014)

Sangita Bhattacharjee Sudip Chakraborty Kunal Mandol Lei Liu Heechul Choi

In this work, photocatalytic oxidation of aqueous phenol solution was carried out in a novel UV-irradiated annular reactor in the presence of TiO2 catalyst. The photocatalytic experiments were conducted by varying the flow rates (5, 7.5, and 10 LPH), substrate-to-catalyst ratios (0.083, 0.5415, and 1), and solution pH (3, 6, and 9). In each case, the demineralization of phenol in aqueous was investigated after an operating time of 3 h. The influence of each parameter on phenol degradation was thoroughly investigated and reported. The strategy consisted of several steps, such as selection of the variables and their experimental domain, use of a screening design to detect significant variables and interactions into the experimental region, study of the main effect of variables and interactions, and finally application of a Draper–Lin small composite design (orthogonal) to obtain the optimum values of the significant variables leading to high conversion of phenol. Efficiency of phenol degradation was found to decrease with increase in substrate to TiO2 ratio. The flow rate and solution pH were found to affect the degradation appreciably. Kinetic study of the photocatalytic reaction revealed that phenol degradation could be well explained using Langmuir–Hinshelwood model. In dilute solution, the degradation was found to follow a pseudo-first-order model. The apparent rate constant was determined and reported.

Degradation

Central composite design

10.1080/19443994.2014.896750

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Citations (10)

Biodegradation of a field pesticide

LAP LAMBERT Academic Publishing eBooks (2014)

Tiyasha Kanjilal Chiranjib Bhattacharjee Siddhartha Datta

Elimination of pollutants from contaminated sites using microorganisms is an economical alternative to chemical technology. A bacterium capable of utilizing Parathion as sole carbon and energy source isolated from agriculture effluent using selective enrichment on MS media containing Parathion, a commonly used insecticide. The strain was identified as belonging to the genus Cupriavidus based on a phylogram constructed. The experiment was studied under submerged culture in selective broth at varied interval of time in view of dry weight of bacterial biomass, further emphasizing the optimization of different process parameters by Central Composite Design and ANOVA for the bio-degradation of Parathion. The mathematical model fitting of the growth curve of the isolated bacteria is also shown. Towards the final phases, the chemical analysis, characterization of Parathion in effluent sample as well as the confirmation of its degradation is observed. The work reflects Cupriavidus sp. as potential degraders of the pesticide Parathion and highlights in utilizing the resourceful microbial world in treatment of agro-chemical effluent.

Parathion

Parathion methyl

Enrichment culture

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Analysis of continuous stirred ultrafiltration based on dimensional analysis approach

Korean Journal of Chemical Engineering (2004)

Chiranjib Bhattacharjee

Dimensionless quantity

Ultrafiltration (renal)

Cellulose acetate