Papers by Dnyaneshwar Shinde
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Drinking Water Engineering and Science, Nov 16, 2017
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Analysis of untreated chrome electroplating effluent procured from electroplating unit showed tha... more Analysis of untreated chrome electroplating effluent procured from electroplating unit showed that it was acidic in nature (pH=1.51) and it contains Cr(VI) at the concentration 70.74±0.31 ppm. This effluent is used for further experiments. Removal of chromium from effluent was achieved in two steps. In first step Cr(VI) was reduced to Cr(III) by reaction with H2O2 and 0.6 ml 30% H2O2 was found sufficient for complete reduction of Cr(VI) from 1 liter of effluent. Then in second step Cr(III) was removed from effluent by precipitating it as Cr(OH)3 in presence of activated charcoal. In absence of activated charcoal pH at which Cr(III) get precipitated, it has been observed that some quantity of Cr(III) oxidizes to Cr(VI) again. Removal of Cr(III) is governed by pH of solution and at pH 6.5 to 7.0 more than 99.00% of Cr(III) has taken place. By this process chromium removal efficiency was observed more than 99.00%. After bench scale experiment process was tried at pilot scale and design...
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DESALINATION AND WATER TREATMENT, 2017
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Asian Journal of Chemistry, 2015
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Journal of Heterocyclic Chemistry
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International Journal of Engineering Development and Research, 2017
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International Journal of Scientific Research in Science and Technology, 2018
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The dried biomass of species of cyanobacteria Nostoc entophytum, N. punctiforme and N. ellipsospo... more The dried biomass of species of cyanobacteria Nostoc entophytum, N. punctiforme and N. ellipsosporum was assessed for phycobiliprotein and carotenoid content. The biomass left after extraction of pigments was utilized for the adsorption of heavy metal ions. The phycobiliprotein content of these species ranged from 32.1–51.1 mg g –1 on a dry weight (dw) basis, while the total carotenoids content varied from 9.7 to 14.5 mg g –1 dw. The pH-dependant adsorption of metal ion showed that optimum adsorption of Cu(II) and Cd(II) takes place at pH 4-6, and that of Cr(VI) at pH 1-2. Kinetics of adsorption of metal ions on biomass of these species showed that initial rate of adsorption of metal ions was fast and within 120 min in which 78-88% of Cu(II), 56-62% of Cd(II) and 52-64% of Cr(VI) was adsorbed by the Nostoc species biomass. For more than 90% adsorption, the time required was about 6 h for Cu(II), 36-48 h for Cd(II) and 48-60 h Cr(VI). Column experiments showed that the biomass of the...
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ES Food & Agroforestry, 2021
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International Nano Letters, 2020
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ES Energy & Environment, 2021
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Asian Journal of Chemistry, 2020
In present study, ZnO photocatalysts were successfully synthesized by thermal decomposition of di... more In present study, ZnO photocatalysts were successfully synthesized by thermal decomposition of different precursors. Thermal decomposition temperatures of precursors were obtained by thermogravimetric analysis. The synthesized ZnO photocatalysts were characterized for their crystalline phase, surface morphology and band gap, respectively by powder X-ray diffraction, scanning electron microscopy and diffuse reflectance spectroscopic methods. Chemical analysis of synthesized ZnO photocatalysts was performed for Zn(II) content. Photocatalytic activity of ZnO photocatalysts was evaluated under the solar irradiation on crystal violet dye in aqueous solution. The results of experiments showed that ZnO synthesized from zinc carbonate consists of higher photocatalytic activity than ZnO synthesized from other precursors, which is even higher than bench mark Degussa P-25 TiO2 photocatalyst. ZnO synthesized from zinc carbonate is further used for mineralization of dyes from three different eff...
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Engineered Science, 2020
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Tetrahedron Letters, 2020
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Materials Science-Poland, 2018
A dye-sensitized solar cell (DSSC) was assembled using a dye 4-(3-chloro-1, 4-dioxo-1, 4-dihydron... more A dye-sensitized solar cell (DSSC) was assembled using a dye 4-(3-chloro-1, 4-dioxo-1, 4-dihydronaphthalen-2-ylamino) benzoic acid with ZnO as a photoanode. It was synthesized using 2, 3-dichloro 1, 4-naphthoquinone and p-amino benzoic acid. The spectral features of the dye were analyzed in ethanol using experimental and computational methods. The theoretical investigations revealed that the synthesized dye may act as a sensitizer in DSSCs. The photoelectrochemical performance was tested under direct sunlight using a sandwich type DSSC. The photovoltaic data of the dye adsorbed on ZnO films indicated thepower conversion efficiency of 1.07 % under sunlight with a light intensity of 39 mW·cm-2.
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Oriental Journal of Chemistry, 2018
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ACS Omega, 2019
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RSC Advances, 2019
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Papers by Dnyaneshwar Shinde