Adsorptive properties of molasses modified boron enrichment waste based nanoclay for removal of basic dyes

Vinod Kumar Gupta,Shilpi Agarwal,Asim Olgun,Halil I brahim Demir,Mehmet Lutfi Yola,Necip Atar 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-

In this study, the removal of cationic dyes, Basic Red 46 (BR46) and Basic Blue 41 (BB41), from aqueoussolution using boron enrichment waste (BW) and molasses modified boron enrichment waste (MBW)based nanoclays was presented in a batch system and fixed-bed column system. The effects of pH,contact time, initial solution concentration, adsorbent dosage, temperature of batch operation on theuptake of both dyes were investigated. The adsorption data were further performed on the basis ofkinetic and isotherm models. According to the results, the dye removal capacity of MBW was higher thanthat of BW. The studies demonstrated that the adsorption patterns occurred according to Langmuirisotherm model and pseudo-second-order kinetic model. The adsorption of two dyes is spontaneous andexothermic in nature. Breakthrough curves obtained from fixed-bed column tests showed that columnadsorption capacities provided strong evidence of the potential of the nanoclay for the technologicalapplications of the basic dyes removal from aqueous solutions.

Microwave-assisted hydrothermal synthesis and adsorption properties of carbon nanofibers for methamphetamine removal from aqueous solution using a response surface methodology

Vinod Kumar Gupta,Shilpi Agarwal,Inderjeet Tyagi,Maryam Sohrabi,Ali Fakhri,Sahar Rashidi,Nima Sadeghi 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.41 No.-

Carbon nanofibers have been synthesized by simple facile microwave-assisted hydrothermal route andapplied as adsorbent for the fast adsorption of methamphetamine. The topological property of CNF wasanalyzed using XRD, SEM, TEM, and nitrogen adsorption–desorption instrumental techniques. Thesignificance of the independent variables and their interactions were tested by the analysis of variance(ANOVA) and t-test statistics. Influential parameters are optimized using BBD implemented with RSM,and the optimized value of pH, adsorbent dose and temperature was found to be 8.0, 0.1 g and 298 K,respectively. Under optimal conditions, the removal efficiency of methamphetamine was found to be55.25 mg/g.

Nanocomposite pectin Zr(IV) selenotungstophosphate for adsorptional/photocatalytic remediation of methylene blue and malachite green dyes from aqueous system

Vinod Kumar Gupta,Gaurav Sharma,Deepak Pathania,N.C. Kothiyal 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

A pectin zirconium (IV) selenotungstophosphate (Pc/ZSWP) nanocomposite was prepared via sol–gelmethod. The material was characterized using different techniques such as FTIR, SEM and TEM. Theadsorptional/photocatalytic activity of Pc/ZSWP was investigated for the removal of methylene blue andmalachite green dyes in two different conditions. It was revealed that the synergistic adsorptional/photocatalytic degradation of dyes was more efficient than mere adsorption in dark followed byphotocatalysis. The photocatalytic degradation percentage of MB and MG dyes onto Pc/ZSWPnanocomposite was found out to be 89.21 and 79.27% in 3 h of photo irradiation which is higherthan for adsorption in dark followed by photocatalysis. The antimicrobial activity of Pc/ZSWP was alsoascertained against Escherichia coli.

Bioadsorbents for remediation of heavy metals: Current status and their future prospects

Vinod Kumar Gupta,Arunima Nayak,Shilpi Agarwal 대한환경공학회 2015 Environmental Engineering Research Vol.20 No.1

The biosorption process has been established as characteristics of dead biomasses of both cellulosic and microbial origin to bind metal ion pollutants from aqueous suspension. The high effectiveness of this process even at low metal concentration, similarity to ion exchange treatment process, but cheaper and greener alternative to conventional techniques have resulted in a mature biosorption technology. Yet its adoption to large scale industrial wastewaters treatment has still been a distant reality. The purpose of this review is to make in-depth analyses of the various aspects of the biosorption technology, staring from the various biosorbents used till date and the various factors affecting the process. The design of better biosorbents for improving their physico-chemical features as well as enhancing their biosorption characteristics has been discussed. Better economic value of the biosorption technology is related to the repeated reuse of the biosorbent with minimum loss of efficiency. In this context desorption of the metal pollutants as well as regeneration of the biosorbent has been discussed in detail. Various inhibitions including the multi mechanistic role of the biosorption technology has been identified which have played a contributory role to its non-commercialization.

Structural, morphological and optoelectronic aspects of YAlO3:Dy3+ doped nanocrystalline materials for NUV energized WLEDs

Gupta Isha,Singh Sitender,Kumar Pawan,Bhagwan Shri,Kumar Vinod,Singh Devender 한국물리학회 2022 Current Applied Physics Vol.43 No.-

Cost-effective urea assisted solution combustion (SC) synthetic method was employed to prepare a series of doped YAlO3:xDy3+ (0.01–0.08 mol) phosphors. The resulting powdered samples were comprehensively examined through various structural as well as optical measurements. Rietveld refinement studies concluded that prepared nanomaterials structured into the orthorhombic system having Pbnm (62) space group. Energy dispersive spectral (EDS) analysis was executed to observe the relative proportions of constituent elements in all doped nanophosphors. Transmission electron microscopy (TEM) micrograph indicated the presence of agglomerated particles with the average size in the nano range. Photoluminescence excitation (PLE) spectra showed that the designated phosphors could be excited by near ultraviolet (NUV) energized lighting sources. The strongest emission centred at 576 nm, corresponding to electric dipole (4F9/2 → 6H13/2) transition of Dy(III) ion. Furthermore, characteristics photometric parameters viz. correlated color temperature (CCT), chromaticity coordinates (x and y), and color purity (%) were figure out with the aid of PL data, which strongly endorsed their usage in NUV energized WLEDs applications.

Deciphering genome-wide WRKY gene family of Triticum aestivum L. and their functional role in response to Abiotic stress

Saurabh Gupta,Vinod Kumar Mishra,Sunita Kumari,Raavi,Ramesh Chand,Pritish Kumar Varadwaj 한국유전학회 2019 Genes & Genomics Vol.41 No.1

WRKY transcription factors (TFs) act in regulating plant growth and development as well as in response to different stress. Some earlier studies done by individual researchers reported different wheat WRKY TFs. Although, the recently released wheat genome has opened an avenue to investigate wheat WRKYs (TaWRKY) TFs. Prime objective of this study to performed genome-wide classifications of TaWRKYs and their functional annotation. The classification of 107 individual identified characterized sequences of TaWRKY (IICS-TaWRKY) and 160 uncharacterized draft sequences of TaWRKY (UDS-TaWRKY), along with their gene structures and motifs analysis was performed. Along with comparative sequence analysis and microarray analysis was performed to mimic out TaWRKYs functions in response to different abiotic stresses, accompanied by in-vitro validation. The comparative phylogenetic analysis and estimation of Ka/Ks ratio with Triticum urartu, illustrate group based clasifications of TaWRKYs and evolutionary divergences. Furthermore, motif-based and protein-DNA interaction analysis of TaWRKYs helps to identify, their putative function in target DNA recognition sites. Subsequently, results of microarray and comparative sequence analysis provides the evidence of TaWRKYs involved in heat and/or drought stress. Further, in-vitro results validates that TaWRKY014, TaWRKY090 are found to participate in response of drought stress, whereas TaWRKY008, TaWRKY122, and WRKY45 are involved in response of heat and drought stress. These findings can be utilized in developing novel heat and drought-tolerant wheat cultivars using marker-assisted breeding and transgenic development.

Characteristics and electrical conductivity of graphene and graphene oxide for adsorption of cationic dyes from liquids: Kinetic and thermodynamic study

Omid Moradi,Vinod Kumar Gupta,Shilpi Agarwal,Inderjeet Tyagi,Mohammad Asif,Abdel Salam Hamdy Makhlouf,Hamidreza Sadegh,Ramin Shahryari-ghoshekandi 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.28 No.-

Graphene (G) and Graphene oxide (GO) were employed in the present study for the removal of two toxiccationic dye Basic Red 12 (BR 12) and Basic Red 46 (BR 46), from aqueous solutions. Graphene oxide wassynthesized by Hummer–Offeman method, and then characterized by XRD (X-ray diffraction), and FT-IR(Fourier Transform Infrared spectroscopy). The influence of various physico-chemical parameters suchas electrical conductivity behaviors, contact time, solution pH, dye concentration and temperature werewell investigated and elucidated. The kinetics and thermodynamics of the toxic dye removal processwere also investigated; results clearly depicts that the kinetics of the removal of BR 12 and BR 46 using Gand GO as adsorbents follows a pseudo-second-order model. G and GO exhibited high-adsorptioncapacity for BR 12 and BR 46. The dye removal depends on the initial pH of the solution with themaximum uptake occurring at about pH 9. Moreover, the thermodynamic results confirmed thatadsorption of dye BR 46 on G and GO were exothermic and adsorption of dye BR 12 on G and GO wereendothermic in nature. The electrical conductivity behaviors of the aqueous solution were found to beenhanced by oxidation of graphene.

An Insight of Nanomaterials in Tissue Engineering from Fabrication to Applications

Sharma Ritika,Kumar Sanjeev,Bhawna,Gupta Akanksha,Dheer Neelu,Jain Pallavi,Singh Prashant,Kumar Vinod 한국조직공학과 재생의학회 2022 조직공학과 재생의학 Vol.19 No.5

Tissue engineering is a research domain that deals with the growth of various kinds of tissues with the help of synthetic composites. With the culmination of nanotechnology and bioengineering, tissue engineering has emerged as an exciting domain. Recent literature describes its various applications in biomedical and biological sciences, such as facilitating the growth of tissue and organs, gene delivery, biosensor-based detection, etc. It deals with the development of biomimetics to repair, restore, maintain and amplify or strengthen several biological functions at the level of tissue and organs. Herein, the synthesis of nanocomposites based on polymers, along with their classification as conductive hydrogels and bioscaffolds, is comprehensively discussed. Furthermore, their implementation in numerous tissue engineering and regenerative medicine applications is also described. The limitations of tissue engineering are also discussed here. The present review highlights and summarizes the latest progress in the tissue engineering domain directed at functionalized nanomaterials.

Multimodality Medical Image Fusion Based on New Features in NSST Domain

Padma Ganasala,Vinod Kumar Gupta 대한의용생체공학회 2014 Biomedical Engineering Letters (BMEL) Vol.4 No.4

Purpose Multimodality medical image fusion supports bettervisualization of complimentary information given by differentmedical imaging modalities. This helps the radiologist forthe precise diagnosis of disease and treatment planning. Main purpose of this research is to design a unified framework for fusion of different anatomical imaging modalitiesand fusion of functional image with an anatomical image. Methods A novel image fusion framework utilizing newfeatures in Nonsubsampled Shearlet Transform (NSST) domainis proposed for fusion of anatomical images. The source imagesare represented in low-frequency (LF) and high-frequency(HF) sub-bands using NSST. LF sub-bands are combined byfusion rule based on sum of variation in squares. HF fusionrule is formulated based on two different features. InverseNSST of fused sub-bands gives the fused image. Further, thisframework is utilized for fusion of functional and anatomicalimages in l-Alpha-Beta color space. Results The proposed image fusion framework is validatedon nine sets of CT-MRI, and SPECT-MRI images of differentdiseases. It is compared with state of the art image fusionmethods both quantitatively and qualitatively. Conclusions Visual analysis of CT-MRI image fusion resultsreveal that the fused images by proposed method retain thesalient information of both CT and MRI images with morecontrast than other methods. Fused SPECT-MRI images byproposed method presents anatomical details of MRI imageswithout altering the functional content of SPECT images. However, spectral distortion is present in other methods. Quantitative comparison proved the superiority proposedmethod compared to other methods.

Adsorption of gold from cyanide leaching solution onto activated carbon originating from coconut shell—Optimization, kinetics and equilibrium studies

Rasoul Khosravi,Asghar Azizi,Reza Ghaedrahmati,Vinod Kumar Gupta,Shilpi Agarwal 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-

This study investigates the behavior of gold adsorption from cyanide leaching solution onto activated coconut shell carbon. The experimental was designed according to CCD implemented with RSM and a quadratic model was developed for regression analysis. The effects of important parameters including pH, agitation rate, adsorbent concentration and adsorption time were studied to find the best operating conditions, and the optimized value of pH, agitation rate, activated carbon concentration and adsorption time was found to be 11, 40 rpm,1.25 g/L and 3 h, respectively. Under these conditions, the adsorption rate was found to be about 87.11%. Also, the optimal conditions were established on industrial cyanide leaching solution and the results demonstrated that adsorption rate of gold could be obtained about 89.25%. Adsorption behavior was kinetically investigated using pseudo first-order and pseudo secondorder models among which data were mostly correlated to pseudo first-order model. The further analysis of kinetics indicated that intra-particle diffusion was the rate-limiting step. Adsorbate–adsorbent interactions at 298 k was assessed by Langmuir, Freundlich, and Temkin isotherm models from which Freundlich model had the highest consistency with the experimental data.