D.V. Parwate’s research while affiliated with Rashtrasant Tukadoji Maharaj Nagpur University and other places

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Publications (32)


INFLUENCE OF OPERATIONAL PARAMETERS ON REMEDIATION OF INDIGO CARMINE DYE SOLUTIONS BY GAMMA RADIOLYSIS
  • Poster

January 2023

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5 Reads

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D V Parwate

All chemicals used were of AR grade and solutions were prepared using Double distilled Water.  Systems containing different concentrations of Indigo Carmine dye were prepared and exposed to different doses of gamma radiations.  Decolorization of dye solutions was followed as a function of absorbance.  The effect of pH on extent of dye decolorization was studied at three different pH values viz. 3,the actual pH of solution and at 10. Abstract In the present study, the decolorization of aqueous solutions of Indigo Carmine dye which is primarily used as pH indicator and also in the manufacturing of capsules, in surgery used to highlight the urinary tract, was investigated using 60Co as gamma radiation source at a dose rate of 0.386 kGy/hr. The effect of various operational parameters such as initial dye concentration, gamma radiation dose and pH of dye solution on the rate and extent of decolorization was also investigated.



Preliminary Feasibility Study of Colorimetric Properties as An Assessment Tool for Cost-Effective Dye Impregnated Paper Gamma Dosimeters

December 2021

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2 Reads

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1 Citation

Turkish Online Journal of Qualitative Inquiry

Gamma a radiations are known to bring about radiolysis of myriadcompounds/dyes which is used tomeasure of the energy of the incident radiation on the system. The use of various dye solutions for chemical dosimetry is reportedin literature. Various thin film dosimeters, semi-conductor dosimeters are also reported and widely used. Similarlyγ -dose quantification using paperor polymer impregnated with dyes has also been reported. In the present study, decolouration due to gamma radiation of various dye impregnated papers viz.Gentian Violet (GV), Malachite Blue (MB), Malachite Green (MG), Brilliant Yellow (BY) and Congo Red (CR) has been investigated using device independent colour parameters. The colour analysis was done by standard procedures of Commission Internationale de l’EclairageCIE.Color has mind dependency so to eliminate the errors in determination colour parameters are evaluated


Figure 3(a). Effect of H2O2 on Gamma Radiolysis of Methylene Blue
Properties of Dyes.
Synergistic Effect of H2O2 Addition on Gamma Radiolytic Decoloration of Some commercial Dye Solutions
  • Article
  • Full-text available

February 2021

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55 Reads

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4 Citations

IOP Conference Series Materials Science and Engineering

Gamma radiations have emerged as a potential tool to degrade and decolorize the industrial effluents containing synthetic dyes in eco friendly and efficient manner. The dose and exposure time required to achieve the efficient decolration are quite high using gamma radiations alone during gamma radiolysis of synthetic dyes. Studies have revealed that, it can be brought down significantly on addition of H 2 O 2 as it enhances the degree of decoloration. This happens due to the formation of highly oxidizing •OH radicals that are formed due to rapid reaction of H 2 O 2 with hydrated electrons formed during radiolysis of water. Further as the dose of H 2 O 2 increases, extent and rate of decoloration also increases up to a certain value referred to as critical dose. But further increase in dose of H 2 O 2 beyond this critical value affects the extent of decoloration adversely. In present communication, the gamma radiation induced decoloration of Methylene Blue, Malachite Green and Indigo Carmine dyes was achieved using various doses of H 2 O 2 . It was observed that, the value of H 2 O 2 Critical dose required for efficient decoloration varies from dye to dye indicating its dependence on structure and concentration of dye solutions.

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Fig. 1. Stability of irradiated and unirradiated congo red solutions (0.02 mM) with respect to time.
Fig. 2. Variation of curve of G-value against gamma dose absorbed.
The variation in absorbances of the irradiated and unirradiated aqueous congo red dye solutions with time
Preliminary feasibility study of congo red dye as a secondary dosimeter

June 2019

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134 Reads

The present work has been carried out to study the potential of congo red dye as secondary dosimetry. Congo red dye solution is found to be sensitive towards gamma radiations. The molar extinction coefficient of the dye solution was found to be 2.70 × 10 5 l mol −1 cm −1 at max 499.0 nm. Aqueous congo red dye solution of 0.02 mM concentration was irradiated for varying doses (0.05-0.15 kGy). The G-values were calculated by estimating the amount of dye consumed due to radiolytic decomposition. The average G-value was found to be 63.30 mol 100 eV at the above concentration. The estimation was done spectrophotometrically using ELICO SL-150/ Shimadzu UV 240 spectrophotometer. The dose determined using congo red dye solution was found to be in agreement with that of Fricke dosimetry.


Evaluation of Advanced NAA and AAS Techniques Against Conventional Techniques for Analysis of Metals in Bauxite Ores

July 2017

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46 Reads

Analytical Chemistry Letters

Mining, as a whole has the potential to shape and affect economies directly and indirectly. India as a country is endowed with huge reserves of many minerals. The current study focuses on evaluation of the conventional analytical techniques used post mining of bauxite ore against the advanced Neutron Activation Analysis (NAA) and Atomic Absorption Spectrometry (AAS) for analysis of its constituent metals. Detection levels of AAS showed the lowest levels of concentration for all metals when compared to wet chemical and NAA results. While this may be attributed to dilution errors associated with AAS, consistency was also observed to be lacking between the two technically superior methods viz. AAS and NAA. Though predictability could be established post statistical deliberations for NAA results of aluminium and titanium using corresponding regression equations of wet chemical analysis, the same was not observed to be desirable for iron quantification by NAA. This may in turn be due to minimal sample losses in wet chemical analysis and the total absence of the same in NAA technique which requires zero handling thus minimizing scope of human errors.



Fig. 5 (a). Biosorption isotherm and for Cd(II) ions removal on activated biocarbon.
Fig. 5 (b). Langmuir isotherm for Cd(II) ions removal on activated biocarbon.
Separation of Zn(II) and Cd(II) ions from Synthetic Waste Water by Adsorption on Activated Carbon Derived from Tridax procumbens

June 2014

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97 Reads

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3 Citations

Analytical Chemistry Letters

The use of activated carbon derived from Tridax procumbens for the treatment of waste water containing heavy metals is an innovative method. It constitutes a simple, effective and economical means for waste water treatment. Adsorption of toxic heavy metals viz. Zn(II) and Cd(II) were studied from synthetic waste water on activated biocarbon derived from Tridax procumbens. Batch adsorption experiments were performed with activated biocarbon as a function of pH, contact time and amount of activated biocarbon. The most favourable pH required for maximum adsorption was found to be 3.6 and 3.8 for Zn(II) and Cd(II) respectively. The maximum contact time for the equilibrium condition was found to be 180 min. The maximum efficiencies of Zn(II) and Cd(II) removal by biocarbon were 97.74 % and 90.62 % respectively. When the amount of activated biocarbon was increased, percentage removal of metal ions also increased for the system containing upto 3.0 g of biocarbon. Beyond this no appreciable change was observed. The linear Langmuir and Freundlich models were applied to describe equilibrium isotherms and both models fitted well.


Efficient photocatalytic hydrogen generation by silica supported and platinum promoted titanium dioxide

September 2013

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72 Reads

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8 Citations

Materials Research Bulletin

Titanium dioxide was supported on mesoporous silica and promoted with Pt and Ru. The supported photocatalysts show high surface area and better photocatalytic activity in visible light as compared to the benchmark Degussa P25. These photocatalysts were characterized using XRD, BET-SA, and UV-DRS techniques. The surface area of supported photocatalyst was 140.6 m2/g which is higher than Degussa P-25. Supported photocatalyst was evaluated for hydrogen evolution via water splitting reaction using ethanol as a sacrificial donor. Hydrogen yield observed is 4791.43 μmol/h/g of TiO2 and that for P-25 is 161 μmol/h/g of TiO2 under visible light irradiation. The value is 30 times higher than benchmark material Degussa P-25. This photocatalyst is also found stable up to 24 h without replenishing with sacrificial donor ethanol. However silica gel/TiO2/Ru does not show any exciting result for hydrogen generation. The effect of various operating parameters like photocatalyst loading, Illumination time and intensity of light on supported photocatalyst also has been studied.


Figure 1. Anthelmintic activity of various extracts of Citrus sinensis seed coats
Table 1 . Anthelmintic activity of various extracts of Citrus sinensis seed coats
IN-VITRO ANTHELMINTIC ACTIVITY OF CITRUS SINENSIS SEED COATS

August 2012

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527 Reads

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2 Citations

International Journal of Pharmacological Research

The crude extracts of Citrus sinensis seed coats were evaluated for anthelmintic activity using adult earthworms. Â Petroleum ether, chloroform and methnolic extracts of Citrus sinensis seed coats were evaluated separately for anthelmintic activity by using adult Indian earthworms, Pheretima posthuma (Annelida). Various concentrations of all extracts were tested and results were expressed in terms of time for paralysis and time for death of worms. Piperazine citrate (10 mg/mL) was used as a reference standard and distilled water as control group.


Citations (16)


... Pyrex glass tubes were used to treat samples under gamma radiation. A total of 10 mL of each dye concentration (30-90 mg/L) was taken in Pyrex glass tubes, and irradiation was performed for different absorbed doses (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). This experiment was performed at room temperature. ...

Reference:

Degradation of Reactive Yellow 18 Using Ionizing Radiation Based Advanced Oxidation Processes: Cytotoxicity, Mutagenicity and By-Product Distribution
Synergistic Effect of H2O2 Addition on Gamma Radiolytic Decoloration of Some commercial Dye Solutions

IOP Conference Series Materials Science and Engineering

... It can be considered as cost-effective analytical technique. It is utilized frequently in analysis of β-lactam antibiotics in different types of matrices, like bulk drugs [19,25], pharmaceutical dosage forms [26][27][28][29][30], plant extracts and biological samples [31][32][33]. ...

Thin-layer chromatographic selective and stability-indicating method for assay of cefixime in pharmaceuticals
  • Citing Article
  • December 2011

JPC - Journal of Planar Chromatography - Modern TLC

... Various analytical techniques have been developed to quantify CIP in different matrices alone or in combination with other drugs. These methods include UV spectrophotometric [2][3][4], spectrofluorimetric [5][6][7][8][9], TLC [10][11][12][13][14], HPLC [14][15][16][17][18][19][20][21][22], and electrochemical [23][24][25] methods. Tinidazole (TIN) is a member of the nitro-imidazole class of antimicrobial that has activity against a number of anaerobic bacteria and protozoa. ...

High performance thin-layer chromatographic selective and stability indicating method for assay of ciprofloxacin in pharmaceuticals

... Extracts of Cajanus cajan are in several flavonoids, isoflavonoids, tannins, and protein fractions which have significant antibacterial properties. Specifically, Cajanus cajan extracts possess hepatoprotective, anthelmintic, glycemic, anticancer, hypocholesterolaemia, antidiabetic, neuroactive, and antioxidant properties [73][74][75]. ...

In Vitro Study of Antibacterial Activity of γ-irradiated and Unirradiated Leguminous Seed Coats
  • Citing Article

... Thus the present study was design to evaluate the in-vitro anthelmintic activity of different solvent extract of citrus limon. Anthelmintic activity Citrus limon fruit empty juice sacs were investigated 10 . Comparative study of antioxidants changes including total flavonoid, total phenol and total antioxidant capacity of Citrus limon fruits grown at the north of Iran were examined 11 . ...

EVALUATION OF THE ANTHELMINTIC ACTIVITY OF CITRUS LIMON JUICE SACS
  • Citing Article

... Activated biocarbon prepared from Tridax procumbens leaves are used to remove toxic heavy metals and dyes from industrial wastewater. Batch adsorption experiments were performed as a function of pH, contact time, solute concentration and adsorbent dose [16]. ...

Separation of Zn(II) and Cd(II) ions from Synthetic Waste Water by Adsorption on Activated Carbon Derived from Tridax procumbens

Analytical Chemistry Letters

... TiO 2 is extremely stable, of low cost, and safe for both living and nonliving things. Hence it is considered to be an almost perfect semiconductor for photocatalysis [1][2][3]. Various synthesis protocols of TiO 2 nanoparticles have been reported in literatures that include hydrothermal method, solvothermal method, sol-gel route, precipitation method, and ultrasonic and microwave assisted methods. The sol-gel route is quite attractive for the preparation of nanosized TiO 2 as it offers several advantages including high chemical purity, high homogeneity, purity, and flexibility in offering dopants in high concentrations, easy processing, control on composition, and stoichiometry [4,5]. ...

Silica gel supported titanium dioxide for methyl orange photoreduction
  • Citing Article
  • January 2012

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D.V. Parwate

... Methyl orange (MO) is an anionic dye and a large-scale pollutant. Recent literature on MO degradation is as follows: chitosan-supported copper oxide (Zayed et al. 2020), composite of chitosan modified biochar and MnFe 2 O 4 , chemically modified sludge biochar (Mian and Liu 2020), porphyrin hybrid film (Mota et al. 2020), silver nanoparticles incorporated in halloysite nanotubes (Kadir et al. 2020), chlorophyll-based photocatalysts (Joshi et al. 2009), PVF-PEDOT mats (da Silva et al. 2021), silver nanoparticles in alginate composite (Nguyen et al. 2018), bimetallic zeolitic imidazolate framework-supported Cu nanoparticles (Budi et al. 2021), electrospun chitosan/PVA nanocomposite (Bayat et al. 2021), SiO 2 nanofibers (Batool et al. 2016), and TiO 2 immobilized on glass substrates (Bouarioua and Zerdaoui 2017). ...

Chlorophyll-based photocatalysts and their evaluations for methyl orange photoreduction

Journal of Photochemistry and Photobiology A Chemistry