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Surajit Dey

Bio: Surajit Dey is an academic researcher from Central Glass and Ceramic Research Institute. The author has contributed to research in topics: Membrane & Cubic zirconia. The author has an hindex of 4, co-authored 5 publications receiving 46 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the removal of ciprofloxacin from synthetic solution using nanocomposite ceramic ultra-filtration membrane based separation process is discussed, which targets in remediation of emerging organic contaminants in a cost-effective, environmental-friendly way for production of clean permeate that can be safely disposed off in the environment.

45 citations

Journal ArticleDOI
TL;DR: An indigenously developed low-cost clay-alumina-based ceramic microfiltration membrane of 19-channel configuration has been evaluated for degumming, dewaxing and deacidification of rice bran oil (RBO) miscella having different oil contents at pilot scale as discussed by the authors.
Abstract: An indigenously developed low-cost clay-alumina-based ceramic microfiltration membrane of 19-channel configuration has been evaluated for degumming, dewaxing and deacidification of rice bran oil (RBO) miscella having different oil contents at pilot scale. Rice bran wax and soap particles in miscella will aggregate with changes in temperature. This suggests a technique for their effective separation. Low-temperature cross-flow membrane filtration was used for single-stage degumming-dewaxing and showed 70 % and 80 % removal of acetone insoluble residue from two RBO miscella samples, respectively. Color reduction was 50 %, and oryzanol retention was 70 %. NaOH was used for deacidification in a 10 % excess of that required based on the free fatty acid content in oil. This reduced free fatty acids to 0.2 %. Operating for 10 h with a 0.7 bar trans-membrane pressure, permeate fluxes of 15 and 8 L/m2 hr were obtained for the degumming-dewaxing and deacidification operations, respectively. The process has advantages, such as high micronutrient content (1.56 % oryzanol) and negligible oil loss (2.6 %). Moreover, ceramic membrane processing of RBO miscella could be an effective pre-treatment step with respect to micronutrient enrichment, elimination of heating, neutral oil recovery and a viable option for solvent separation.

17 citations

Journal ArticleDOI
TL;DR: In this article, the problem of dispersing zirconia powder in aqueous suspension using a suitable dispersant for coating application was studied and Zeta potential experiments were conducted in search of stable suspensions.
Abstract: Dispersion of zirconia powder in aqueous suspension using suitable dispersant for coating application was studied. Zeta potential experiments were conducted in search of stable suspensions....

12 citations

Journal ArticleDOI
TL;DR: In this paper, a defect free zirconia ultrafiltration (UF) membrane was developed in single step coating of ZIRconia nanopowder suspension by slip casting method over multichannel ceramic support.
Abstract: Zirconia ultrafiltration membranes are widely developed and used for past several years. But the conventional sol-gel methods of zirconia membrane preparation involve many steps. In the present study an attempt was made to develop defect free zirconia ultrafiltration (UF) membrane in single step coating of zirconia nanopowder suspension by slip casting method over multichannel ceramic support. The porous support was made from a novel composition of clay and α-alumina having 19-channels circular configuration. Zirconia UF membrane was developed at the inner surface of the support up to 0.2 m length. Membrane had a mean pore diameter of 40 nm. Clean water permeability of 48 lm-2h-1bar-1 was obtained for the membrane under cross-flow filtration mode. Membrane was utilized for treatment of industrial and domestic wastewater. Membrane treated water was characterized to evaluate the reduction of organic and inorganic contaminants. About 82% and 92% removal of COD were obtained for tannery wastewater and kitchen sink wastewater respectively and turbidity being reduced below 1 NTU for both the effluents. Complete removal of pathogenic organisms was achieved. Membrane treated wastewater may be reused for agricultural purposes.

8 citations

Journal ArticleDOI
TL;DR: In this paper, the authors developed radiation resistant membranes for the treatment of high level waste (HLW), which were prepared by incorporating varying amounts of ammonium molybdophosphate (AMP), known for efficient Cs(I) uptake from acidic feeds, for the recovery of radio-caesium.
Abstract: In order to develop radiation resistant membranes for the treatment of high level waste (HLW), ceramic tubular membranes were prepared by incorporating varying amounts of ammonium molybdophosphate (AMP), known for efficient Cs(I) uptake from acidic feeds, for the recovery of radio-caesium. The sorption of Cs(I) onto the membrane increased linearly with increasing the AMP content (10%–40%). Radiation stability of the membranes was evaluated by exposing them to gamma radiation obtained from a 60Co source. The composite ceramic material showed excellent radiation stability without any morphological change up to 1100 kGy, indicating its potential application in radioactive waste treatment. For 10% AMP loaded ceramic membrane, the Cs(I) sorption decreased linearly with radiation dose. However, Cs sorption was not altered up to 1100 kGy dose for 20% and 40% loaded AMP.

4 citations


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01 Jan 2016

174 citations

Journal ArticleDOI
TL;DR: In this article, the authors reviewed the literature on CIP adsorption and identified key empirical findings on specific investigation domains, establish knowledge gaps and grey areas that could serve as a foundation for other investigations by researchers and predict future perspectives in the research area.

163 citations

Journal ArticleDOI
TL;DR: In this article, the authors present a comprehensive review for the recent treatment processes available in the literature for oily wastewater with the concentration on the use of various membranes to accomplish this target.

102 citations

Journal ArticleDOI
TL;DR: In this paper, the authors exhaustively review the raw materials, ceramic compositions and variables of the manufacturing processes used in the development of these membranes, with special emphasis on their numerous potential industrial applications.
Abstract: Obtaining low-cost ceramic membranes has attracted great interest in the scientific community in last years, as it allows to preserve the advantages of ceramic materials while significantly reduce their manufacturing costs. This type of membranes is mainly based on the use of raw materials and manufacturing processes typical of traditional ceramic materials, i.e silicate-based ceramics. This work exhaustively reviews the raw materials, ceramic compositions and variables of the manufacturing processes used in the development of these membranes, with special emphasis on their numerous potential industrial applications.

85 citations

Journal ArticleDOI
TL;DR: In this paper, the adsorption of ciprofloxacin onto calcined Verde-lodo (CVL) bentonite clay in a static system was evaluated.
Abstract: Ciprofloxacin (CIP) is the most prescribed antibiotic worldwide and is considered an emerging contaminant. The adsorption of ciprofloxacin onto calcined Verde-lodo (CVL) bentonite clay in a static system was evaluated in this study. CVL clay was characterized by Fourier Transform Infrared Spectroscopy, X-ray Diffraction, Thermogravimetric Analysis, and Zeta analyzer before and after application to examine the adsorption mechanism. Statistical techniques of experimental design were used to determine the best conditions to maximize the adsorption capacity of CIP. Static system tests were performed to evaluate the kinetics, isotherm, and thermodynamics of adsorption. The system reached a maximum Langmuir removal capacity (25 °C) of 114.4 mg g−1 and CVL clay displayed considerable reuse capacity with heat treatment at 500 °C. The ability for regeneration and high removal capacity of CVL provides a promising strategy to mitigate emerging contaminants present in wastewater.

63 citations