Morphological, optical and structural properties of pure, zinc and magnesium doped TiO2 nanoparticles for solar cell devices M. S. Manojkumar, S. Venkatesan, S Pandiarajan, and Journal of Ovonic Research, 2022 Zn2+and Mg2+ions doped Titanium dioxide had been synthesized using a hydrothermal method at 120°C with an annealing temperature at 450°C, including individual Zn2+and Mg2+ ions. In addition, impact of these doping metal ions on the crystallization and phase transition of the Titanium dioxide nanoparticles were discussed by X-Ray Diffraction spectroscopy, Scanning Electron Microscopy, Fourier Transform Infra-Red spectroscopy, UV-Vis spectroscopy and Photo-Luminescence spectroscopy and also by photocatalytic measurements. The presence of anatase type structure in Titanium dioxide nanopowders with high crystallinity and high phase stability in spite of annealing at 450°C significantly specified that the dopants might prevent densification and crystallite growth in Titanium dioxide nanophase by on condition with different boundaries. Furthermore, with a suitable amount of Zn and Mg dopants, anatase grain size of Titanium dioxide powders was reduced. The band gap energy values of Zn2+ and Mg2+ ions doped nano-Titanium dioxide were lower than the pure nano-Titanium dioxide and they exhibited a red shift in the visible region
RSM studies on phenol removal from aqueous solution and removal of phenolic compounds from industrial effluents by ionic liquid [Bmim][BF4] dissolved in tributyl phosphate Journal of Scientific and Industrial Research, 2016
Optimization of Removal of Phenol from Aqueous Solution by Ionic Liquid-Based Emulsion Liquid Membrane Using Response Surface Methodology Arulmozhiappan Balasubramanian, Sivaramu Venkatesan Clean Soil Air Water, 2014 Response surface methodology was employed to optimize the removal of phenol from aqueous solution by ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate dissolved in tributyl phosphate) based emulsion liquid membrane. A “minimum run resolution V” central composite design with six variables (surfactant concentration, internal phase concentration, emulsification time, internal to membrane phase ratio, stirring speed and external phase pH) was applied to optimize the process. The optimized conditions for maximum removal of phenol were a surfactant concentration – 4.95% (v/v), internal agent concentration – 0.298 N, emulsification time – 4.07 min, internal to membrane phase ratio – 0.93, stirring speed – 247 rpm and external phase pH – 5.91 respectively. The results showed good fits with the proposed statistical model for removal of phenol (R2 = 0.9833).
Statistical optimization of chromium ion removal using response surface methodology Journal of Chemical and Pharmaceutical Sciences, 2014
Performance of ionic liquid as bulk liquid membrane for chlorophenol removal International Journal of Chemtech Research, 2013
Extraction of phenol and chlorophenols using ionic liquid [Bmim]+[BF4]- dissolved in tributyl phosphate A. Brinda Lakshmi, A. Balasubramanian, S. Venkatesan Clean Soil Air Water, 2013 In the present work, experiments have been carried out with a focus to reduce the volume requirement of solvent by mixing with imidazolium based ionic liquids (ILs) for the solvent extraction of phenol, p-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, and pentachlorophenol from aqueous solutions. The effect of aqueous phase pH (2–12), agitation speed (100–450 rpm), solute concentration in feed (2–50 mg/L), temperature (303–333 K), treat ratio (1–11), and 1-butyl-3-methyl imidazolium tetrafluoroborate [Bmim]+[BF4]− volume in tributyl phosphate (TBP; 0–0.7% v/v) on extraction of phenols has been studied and optimized. Parameters like strip phase pH (3–13) and stripping agent concentration (0.001–0.009 N) have also been studied for stripping of phenols from solvent phase. It has been found that 0.5% v/v of ionic liquid [Bmim]+[BF4]− in solvent TBP extracts more than 97.5% of phenol and chlorophenols from aqueous solutions with a treat ratio (aqueous to solvent phase ratio) of 5. Transport mechanism for extraction and stripping of phenol and chlorophenols using ionic liquid [Bmim]+[BF4]− has been discussed. The results show that by appropriate selection of extraction and stripping conditions, it is possible to remove nearly all phenols with a treat ratio of 5.
EMULSION LIQUID MEMBRANE PERTRACTION OF METAL IONS FROM AQUEOUS SOLUTIONS AND ELECTROPLATING EFFLUENT USING ROTATING DISK CONTACTOR K. M. Meera S. Begum, S. Venkatesan, N. Anantharaman Chemical Engineering Communications, 2012 Removal of chromium (III), copper (II), and zinc (II) from synthetic aqueous solutions and electroplating wastewater by an emulsion liquid membrane technique (ELM) was studied using a rotating disk contactor (RDC). Kerosene as diluent, Span 80 as surfactant, di-(2ethyl hexyl) phosphate (D2EHPA) as carrier, and 1 N H2SO4 solution as internal stripping phase were used for emulsion preparation. RDC provides relatively low shear to emulsion and thus minimizes rupture of the ELM. Various hydrodynamic and chemical parameters such as metal ion concentration in the continuous (feed) phase, pH of the continuous phase, carrier concentration, agitation speed, internal stripping agent concentration, and flow rate ratio of continuous phase to dispersed phase (treat ratio) have been experimentally investigated. The results showed that it is possible to remove more than 95% of all metal ions from aqueous solutions with a concentration factor of more than 35 and a removal of 68–74% of three metal ions from the electroplating effluent.
Extraction of L-glutamic acid using emulsion liquid membrane Journal of the Indian Chemical Society, 2004
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Extraction of Phenol and Chlorophenols Using Ionic Liquid [Bmim] + [BF 4 ] − Dissolved in Tributyl Phosphate A Brinda Lakshmi, A Balasubramanian, S Venkatesan CLEAN–Soil, Air, Water 41 (4), 349-355 , 2013 2013 Citations: 72
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MOST CITED SCHOLAR PUBLICATIONS
Removal of phenolic compounds from aqueous solutions by emulsion liquid membrane containing Ionic Liquid [BMIM]+[PF6]− in Tributyl phosphate A Balasubramanian, S Venkatesan Desalination 289, 27-34 , 2012 2012 Citations: 155
Extraction of Phenol and Chlorophenols Using Ionic Liquid [Bmim] + [BF 4 ] − Dissolved in Tributyl Phosphate A Brinda Lakshmi, A Balasubramanian, S Venkatesan CLEAN–Soil, Air, Water 41 (4), 349-355 , 2013 2013 Citations: 72
Emulsion liquid membrane pertraction of benzimidazole using a room temperature ionic liquid (RTIL) carrier S Venkatesan, KMMS Begum Chemical Engineering Journal 148 (2-3), 254-262 , 2009 2009 Citations: 61
Emulsion liquid membrane pertraction of imidazole from dilute aqueous solutions by Aliquat-336 mobile carrier S Venkatesan, KMMS Begum Desalination 236 (1-3), 65-77 , 2009 2009 Citations: 50
An empirical approach to deposit mobilization of commercial banks in Tamilnadu S Venkatesan IOSR Journal of Business and Management 4 (2), 41-45 , 2012 2012 Citations: 27
Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique S Venkatesan, KM Meera Sheriffa Begum Asia‐Pacific Journal of Chemical Engineering 3 (4), 387-399 , 2008 2008 Citations: 22
Performance of ionic liquid as bulk liquid membrane for chlorophenol removal AB Lakshmi, S Sindhu, S Venkatesan Int. J. ChemTech Res 5 (3), 1129-1137 , 2013 2013 Citations: 21
Optimization of removal of phenol from aqueous solution by ionic liquid‐based emulsion liquid membrane using response surface methodology A Balasubramanian, S Venkatesan Clean–Soil, Air, Water 42 (1), 64-70 , 2014 2014 Citations: 20
Optimization of process parameters using response surface methodology for the removal of phenol by emulsion liquid membrane A Balasubramanian, S Venkatesan Polish Journal of Chemical Technology 14 (1), 46-49 , 2012 2012 Citations: 19
Removal of phenolic compounds from aqueous solutions using Aliquat 336 as a carrier in emulsion liquid membrane A Balasubramanian, S Venkatesan Korean Journal of Chemical Engineering 29 (11), 1622-1627 , 2012 2012 Citations: 17
Emulsion liquid membrane pertraction of metal ions from aqueous solutions and electroplating effluent using rotating disk contactor KMMS Begum, S Venkatesan, N Anantharaman Chemical Engineering Communications 199 (12), 1575-1595 , 2012 2012 Citations: 15
Removal of 2, 4-dichlorophenol using ionic liquid [BMIM]+[PF6]-encapsulated PVDF membrane S Pandiarajan, S Venkatesan Journal of the Indian Chemical Society 100 (1), 100781 , 2023 2023 Citations: 8
RSM Studies on Phenol Removal from Aqueous Solution and Removal of Phenolic Compounds from Industrial Effluents by Ionic Liquid [Bmim][BF4]Dissolved in Tributyl Phosphate AUT A B Lakshmi1 , R Remy2 , A Balasubramanian3 and S Venkatesan3 * 1 Ionic ... journal of scientific and industrial research 75, 512-518 , 2016 2016 Citations: 6
Removal of trivalent chromium from dilute aqueous solutions and industrial effluents using emulsion liquid membrane technique S Venkatesan, KM Meera Sheriffa Begum International Journal of Environmental Engineering 2 (1-3), 250-268 , 2010 2010 Citations: 6
Emulsion liquid membrane pertraction of zinc and copper: Analysis of emulsion formation using computational fluid dynamics K Ganesh Prasadh, S Venkatesan, KM Meera Sheriffa Begum, ... Chemical Engineering & Technology: Industrial Chemistry‐Plant Equipment … , 2007 2007 Citations: 5
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Adsorptive removal of 2, 4 dichlorophenol by polysulfone/graphene oxide blended microcapsules immobilized with CYPHOS® IL 103 ionic liquid S Pandiarajan, S Venkatesan Indian Journal of Chemical Technology (IJCT) 31 (2), 222-232 , 2024 2024 Citations: 1
Factor determining the level of output in organic and inorganic farming in nagapattinam district S Venkatesan Asian Journal of Multidimensional Research (AJMR) 8 (6), 203-217 , 2019 2019 Citations: 1
Experimental analysis and mass transfer model for removal of Phenol from wastewater using emulsion ionic liquid Membrane S Venkatesan, A Balasubramanian, S Pandiarajan CHEMCON, At IIT, Guwahati , 2016 2016 Citations: 1
Organic farming and sustainabiiity of bio-diversity: an ecological perspective in Indian agriculture. S Venkatesan, D Murugan 2012 Citations: 1
