This page has only limited features, please log in for full access.
The extraction and leaching kinetics of V from the spent catalyst (3.06 %V, 10.01% Fe and 0.52 % Mg) was investigated using organic citric acid. The characterization of the spent catalyst sample by XRD, EDAX and SEM was examined to ascertain the existence of V, Mg and Fe in the form of respective oxides. Different organic acids were tested to ensure the leaching performance towards extraction of V, Fe and Mg and based upon the efficacy, the metal extrication trend followed the order as; Citric acid > Tartaric acid > Acetic acid > Formic acid > Oxalic acid. The critical parameters such as citric acid concentration, agitation speed, temperature, S/L and particle size, affecting on either of the metal leaching was systematically examined at varying time extent to establish the leaching mechanism as well as for attaining suitable optimum condition for effective dissolution of vanadium. The leaching kinetics of V, Mg and Fe was governed by diffusion controlled mode while following to shrinking core model mechanism as evident from the correlation coefficient (R2 = 0.99) and the resultant activation energy (11.21 kJ/mole for V, 10.86 kJ/mole for Mg and 11.84 kJ/mole, for Fe). The dissolution behaviour of either of metals examined at various particle size ranges as well as citric acid concentrations follows the linearity trend with above proposed leaching kinetics model. More than 99% of Vanadium, 80% Fe and 75 % Mg leaching was resulted at the optimum condition: S/l: 4%, Citric acid: 1.0 M, temp: 373 K, Particle size: 46-75micron. The residue obtained after leaching at the above optimum condition was further analyzed by XRD and EDAX, indicating no peak due to Vanadium and confirms on almost all extraction of V from the spent catalyst phase.
C. Mohanty; S.S. Behera; B. Marandi; S.K. Tripathy; P.K. Parhi; K. Sanjay. Citric acid mediated leaching kinetics study and comprehensive investigation on extraction of vanadium (V) from the spent catalyst. Separation and Purification Technology 2021, 276, 119377 .
AMA StyleC. Mohanty, S.S. Behera, B. Marandi, S.K. Tripathy, P.K. Parhi, K. Sanjay. Citric acid mediated leaching kinetics study and comprehensive investigation on extraction of vanadium (V) from the spent catalyst. Separation and Purification Technology. 2021; 276 ():119377.
Chicago/Turabian StyleC. Mohanty; S.S. Behera; B. Marandi; S.K. Tripathy; P.K. Parhi; K. Sanjay. 2021. "Citric acid mediated leaching kinetics study and comprehensive investigation on extraction of vanadium (V) from the spent catalyst." Separation and Purification Technology 276, no. : 119377.
Management of fly ash is a global challenge at present scenario due to its huge generation from various industries. Due to direct disposal into the environment process, it becomes serious concern in context contamination vis-a-vis loss of valuable metals. To overcome these issues the valuable metal as well as toxic heavy metals can be recovered and/or removed through various environmental friendly hydrometallurgical methods. The key economical prospective of fly ash caused by claiming of rich resources of valuable metals though concentration profile is limited unlike other secondary phases. The leaching method is often adapted to extract the metals utilizing mineral and organic acids. The characterization of fly ash sources is studied to ascertain physical and chemical properties. The two major aspects on treatment of fly ash are illustrated that includes (a) removal of toxic heavy metals and (b) extraction of valuable metals. This chapter is intended to bring the insight on critical analysis on physico-cum-chemical nature of fly ash, its effect towards environment and mainly of leaching process optimization studies on extraction of numerous heavy and toxic metals. The present status of fly ash treatment through hydrometallurgical extraction of metal values in Indian context as well as global scenario has been extensively overviewed and reported.
Saroj Sekhar Behera; Surendra Hansdah; Debadutta Das; Pankaj Kumar Parhi; Rajesh Kumar Jyothi. Studies on Extraction of Heavy Metal (s) from Fly Ash through Hydroprocessing Approach. Clean Coal Technologies 2021, 289 -310.
AMA StyleSaroj Sekhar Behera, Surendra Hansdah, Debadutta Das, Pankaj Kumar Parhi, Rajesh Kumar Jyothi. Studies on Extraction of Heavy Metal (s) from Fly Ash through Hydroprocessing Approach. Clean Coal Technologies. 2021; ():289-310.
Chicago/Turabian StyleSaroj Sekhar Behera; Surendra Hansdah; Debadutta Das; Pankaj Kumar Parhi; Rajesh Kumar Jyothi. 2021. "Studies on Extraction of Heavy Metal (s) from Fly Ash through Hydroprocessing Approach." Clean Coal Technologies , no. : 289-310.
Rare earth elements (REEs) have obtained a greatest significant in human lives owing to their important roles in various high technology applications. The present method development was deal technology important REEs such as neodymium, terbium and dysprosium, selective extraction with possible separation and recovery studies, successfully. The chloride mediated mixed aqueous solution containing 1500 mg/L each of REEs such as Nd, Tb and Dy was subjected at selective separation of Nd from other associated REEs. Three organo-phosphorous based commercial extracting agents such as Cyanex 272, PC 88A and D2EHPA, were employed for the extraction, possible separation and recovery of rare earth elements. A comparative extraction behavior of all these three extractants as function of time, pH influence, extractant concentration, temperature and diluents were systematically investigated. The extraction tendency of organo-phosphorus reagents towards the extraction of either of the REEs follows of the sequence as: D2EHPA > PC 88A > Cyanex 272. The thermodynamic behavior of either of the extractants on liquid–liquid extraction processing of REEs was investigated and thermodynamic calculations were calculated and presented. Substantial recovery of neodymium oxalate followed by its calcined product as neodymium oxide was ascertained from XRD study and SEM–EDS analysis.
Verónica Cristina Arellano Ruiz; Rambabu Kuchi; Pankaj Kumar Parhi; Jin-Young Lee; Rajesh Kumar Jyothi. Environmentally friendly comprehensive hydrometallurgical method development for neodymium recovery from mixed rare earth aqueous solutions using organo-phosphorus derivatives. Scientific Reports 2020, 10, 1 -13.
AMA StyleVerónica Cristina Arellano Ruiz, Rambabu Kuchi, Pankaj Kumar Parhi, Jin-Young Lee, Rajesh Kumar Jyothi. Environmentally friendly comprehensive hydrometallurgical method development for neodymium recovery from mixed rare earth aqueous solutions using organo-phosphorus derivatives. Scientific Reports. 2020; 10 (1):1-13.
Chicago/Turabian StyleVerónica Cristina Arellano Ruiz; Rambabu Kuchi; Pankaj Kumar Parhi; Jin-Young Lee; Rajesh Kumar Jyothi. 2020. "Environmentally friendly comprehensive hydrometallurgical method development for neodymium recovery from mixed rare earth aqueous solutions using organo-phosphorus derivatives." Scientific Reports 10, no. 1: 1-13.
Background: The alternative of oil is highly essential in the present context due to the acute shortage of oil as well as increasing demand for it from different public and private sectors. Since 1980, attention has been focused on coal-water slurry as an alternative fuel for the power generation industry and a suitable substitute for oil in several industrial applications. One of the exciting areas in Coal Water Slurry (CWS) is coal–water-alcohol slurry in which different alcohol compound can act as a dispersant for the stabilisation of coal–water slurry. Objective: The objective of this paper is to prepare a high concentration coal–water-alcohol slurry using glycerol, glycol and ethanol as an additive, and different particle size distribution of coal. This will increase the surface activity of the coal thereby, decreasing the viscosity of the slurry. Method: Two bimodal samples are prepared in which coarse particles are (212 μm - 300 μm), (150 μm – 212 μm) and fine particle below 75 μm. Three types of alcohol additive namely glycerol, glycol and ethanol are used as a dispersant. Malvern Particle size analyzer is used to measure the particle size distribution of the coal samples. Rheological study of CWAS was conducted using HAAKE RHEO STRESS 1. Result: From the experiment, it has been concluded that the optimum addition of glycerol in water is taken as 90:10 of water and glycerol ratio because after that, there is no further decrease in the value of viscosity. An optimum value of glycol and ethanol mixed in water was determined and found as in the ratio of 86:14 and 82:18, respectively. Conclusion: From different parameter studies like coal concentration, pH, temperature, apparent viscosity and stability, it has been concluded that coal-water-glycerol slurry is better than other coal water- alcohol slurry. This is because of the presence of more OH- groups in glycerol. The static stability of this coal-water-alcohol slurry exists for the maximum period of 31 days.
Debadutta Das; Anupama Routray; Swetashree Pattanaik; Pankaj K. Parhi; Bijnyan R. Das; Subrata N. Das. Effect of Particle Size Distribution and Selective Alcohol Additives for Preparation of High Concentration Coal-Water Slurry. Micro and Nanosystemse 2020, 12, 102 -111.
AMA StyleDebadutta Das, Anupama Routray, Swetashree Pattanaik, Pankaj K. Parhi, Bijnyan R. Das, Subrata N. Das. Effect of Particle Size Distribution and Selective Alcohol Additives for Preparation of High Concentration Coal-Water Slurry. Micro and Nanosystemse. 2020; 12 (2):102-111.
Chicago/Turabian StyleDebadutta Das; Anupama Routray; Swetashree Pattanaik; Pankaj K. Parhi; Bijnyan R. Das; Subrata N. Das. 2020. "Effect of Particle Size Distribution and Selective Alcohol Additives for Preparation of High Concentration Coal-Water Slurry." Micro and Nanosystemse 12, no. 2: 102-111.
Bioleaching being an economically feasible process is considered as a potential alternative of hydro- and pyro-metallurgical processes of metal recovery. The process can be performed in shake flasks, batch reactors, continuous reactors, columns and heap. As the data and knowledge obtained from both column and heap bioleaching are often similar, the majority of successful small scale (shake flasks, batch reactors and continuous reactors) studies are scaled up to heap after the interpretation of the results in column studies and extrapolation, indicating the importance of column bioleaching. This review is the first in this domain, especially on column bioleaching, elaborating the process operation, applications and the various critical factors viz., ore pretreatment, column bioleaching set-up, microbial adaptation, pH, temperature, size fractions, microbial diversity, irrigation (flow) rate, process optimisation, rDNA technology, etc. affecting column bioleaching. Further, the potential microbial types used in column bioleaching and their mechanism of action have been extensively discussed. The modelling feature to determine bioleaching controlling steps, maximum metal dissolution rate, and additionally a glimpse challenges and future prospects of column bioleaching have been represented.
Haragobinda Srichandan; Ranjan Kumar Mohapatra; Puneet Kumar Singh; Snehasish Mishra; Pankaj Kumar Parhi; Kalyani Naik. Column bioleaching applications, process development, mechanism, parametric effect and modelling: A review. Journal of Industrial and Engineering Chemistry 2020, 90, 1 -16.
AMA StyleHaragobinda Srichandan, Ranjan Kumar Mohapatra, Puneet Kumar Singh, Snehasish Mishra, Pankaj Kumar Parhi, Kalyani Naik. Column bioleaching applications, process development, mechanism, parametric effect and modelling: A review. Journal of Industrial and Engineering Chemistry. 2020; 90 ():1-16.
Chicago/Turabian StyleHaragobinda Srichandan; Ranjan Kumar Mohapatra; Puneet Kumar Singh; Snehasish Mishra; Pankaj Kumar Parhi; Kalyani Naik. 2020. "Column bioleaching applications, process development, mechanism, parametric effect and modelling: A review." Journal of Industrial and Engineering Chemistry 90, no. : 1-16.
Herein, polyphenol stabilized gold nanoparticles (AuNPs) have been synthesized for selective removal of cationic dyes from aqueous solution. Gold nanoparticles have been synthesized using Cassytha filiformis plant extract and characterized by UV–vis spectroscopy (UV–vis), High-Resolution Transmission Electron Microscopy (HR-TEM) and X-ray diffraction (XRD). The size of AuNPs was found to be in the range of 8–20 nm with an average size of 12 nm. The newly generated AuNPs demonstrate excellent potential in removing cationic dye such as methylene blue (MB) via photocatalytic degradation under sunlight. The adsorption/degradation behaviour of cationic MB on AuNPs adsorbent from the aqueous solution was studied by varying parameters such as pH and different light sources. Alkaline pH and sunlight were found to be crucial in dye degradation. The adoption of the ultrasonic waves (UW) leads to reduce sorption time significantly with an increase in the sorption ability and at the optimum condition. The AuNPs appear to be promising with a maximum dye loading capacity of 595.23 mg/g and dye degradation efficiency was found to be 87 % after 20 min. Additionally, the antimicrobial studies confirm the significant inhibition (zone of inhibition: 20 mm) of growth of Mycobacterium smegmatis, a model organism for Mycobacterium tuberculosis, suggesting the advancement of a novel new generation eco-friendly and cost-effective ‘green’ AuNPs.
Rohit Kumar Singh; Saroj Sekhar Behera; Khushboo Rani Singh; Sourav Mishra; Bijayananda Panigrahi; Tapas Ranjan Sahoo; Pankaj Kumar Parhi; Dindyal Mandal. Biosynthesized gold nanoparticles as photocatalysts for selective degradation of cationic dye and their antimicrobial activity. Journal of Photochemistry and Photobiology A: Chemistry 2020, 400, 112704 .
AMA StyleRohit Kumar Singh, Saroj Sekhar Behera, Khushboo Rani Singh, Sourav Mishra, Bijayananda Panigrahi, Tapas Ranjan Sahoo, Pankaj Kumar Parhi, Dindyal Mandal. Biosynthesized gold nanoparticles as photocatalysts for selective degradation of cationic dye and their antimicrobial activity. Journal of Photochemistry and Photobiology A: Chemistry. 2020; 400 ():112704.
Chicago/Turabian StyleRohit Kumar Singh; Saroj Sekhar Behera; Khushboo Rani Singh; Sourav Mishra; Bijayananda Panigrahi; Tapas Ranjan Sahoo; Pankaj Kumar Parhi; Dindyal Mandal. 2020. "Biosynthesized gold nanoparticles as photocatalysts for selective degradation of cationic dye and their antimicrobial activity." Journal of Photochemistry and Photobiology A: Chemistry 400, no. : 112704.
A complete extraction and stripping process to obtain enriched vanadium and tungsten concentrate from spent SCR catalyst leach liquor.
Ana Belen Cueva Sola; Pankaj Kumar Parhi; Jin-Young Lee; Hee Nam Kang; Rajesh Kumar Jyothi. Environmentally friendly approach to recover vanadium and tungsten from spent SCR catalyst leach liquors using Aliquat 336. RSC Advances 2020, 10, 19736 -19746.
AMA StyleAna Belen Cueva Sola, Pankaj Kumar Parhi, Jin-Young Lee, Hee Nam Kang, Rajesh Kumar Jyothi. Environmentally friendly approach to recover vanadium and tungsten from spent SCR catalyst leach liquors using Aliquat 336. RSC Advances. 2020; 10 (34):19736-19746.
Chicago/Turabian StyleAna Belen Cueva Sola; Pankaj Kumar Parhi; Jin-Young Lee; Hee Nam Kang; Rajesh Kumar Jyothi. 2020. "Environmentally friendly approach to recover vanadium and tungsten from spent SCR catalyst leach liquors using Aliquat 336." RSC Advances 10, no. 34: 19736-19746.
Microwave (MW) assisted leaching of copper (Cu) and chromium (Cr) from Cu-Cr spent catalyst was investigated. The MW assistance have many advantages over the regular leaching process and in consequences, the leaching time has been significantly reduced from 240 min to 120 min. The optimum condition; 900 Watt MW power, 2.0 min MW treatment time, 10% H2O2(v/v) and 1.0 M sulphuric acid for during MW irradiation followed by leaching with a very low concentration of H2SO4 (1% (w/w)) was suitable for quantitative extraction of both metals from the spent catalyst phase. The role of either of the oxidants (H2O2, NaClO4, K2S2O8 and HNO3) appears to be critical on enhancing the leaching efficiency of both copper and chromium in addition to the MW treatment. The leaching kinetics study was examined to ascertain the extraction mechanism. The activation energies were obtained to be 3.49 kJ mol−1 and 3.33 kJ mol−1 for Cu and Cr, respectively, indicating on the shrinking-sphere diffusion control leaching behaviour. The linear dependence log kap on log 1/do plot and a first order dependence for kap with H2SO4 at 1.0 M was derived from the proposed leaching model. The FESEM characterization of spent catalyst before and after MW treatment showed a significant change of the particle morphology (shred type to porous type). The XRD and EDAX characteristics pattern of residue samples resulted at optimum leaching condition further ascertained on substantial extraction of copper (99.99%) and chromium (98.56%) from spent catalyst phase.
S.S. Behera; Subhendu K. Panda; D. Das; R.K. Mohapatra; H.I. Kim; J.Y. Lee; R.K. Jyothi; P.K. Parhi. Microwave assisted leaching investigation for the extraction of copper(II) and chromium(III) from spent catalyst. Separation and Purification Technology 2020, 244, 116842 .
AMA StyleS.S. Behera, Subhendu K. Panda, D. Das, R.K. Mohapatra, H.I. Kim, J.Y. Lee, R.K. Jyothi, P.K. Parhi. Microwave assisted leaching investigation for the extraction of copper(II) and chromium(III) from spent catalyst. Separation and Purification Technology. 2020; 244 ():116842.
Chicago/Turabian StyleS.S. Behera; Subhendu K. Panda; D. Das; R.K. Mohapatra; H.I. Kim; J.Y. Lee; R.K. Jyothi; P.K. Parhi. 2020. "Microwave assisted leaching investigation for the extraction of copper(II) and chromium(III) from spent catalyst." Separation and Purification Technology 244, no. : 116842.
This chapter contains sections titled: Introduction Current Soil Pollution Scenario Effects of Soil Pollution Diversity of Soil Microbes from Contaminated Sites Bioremediation of Toxic Pollutants Bioremediation Mechanisms Factors Affecting Bioremediation/Biosorption Process Microbial Bioremediation Approaches Conclusion and Future Prospective Acknowledgements
Ranjan Kumar Mohapatra; Haragobinda Srichandan; Snehasish Mishra; Pankaj Kumar Parhi. Native Soil Bacteria: Potential Agent for Bioremediation. Soil Microenvironment for Bioremediation and Polymer Production 2019, 17 -34.
AMA StyleRanjan Kumar Mohapatra, Haragobinda Srichandan, Snehasish Mishra, Pankaj Kumar Parhi. Native Soil Bacteria: Potential Agent for Bioremediation. Soil Microenvironment for Bioremediation and Polymer Production. 2019; ():17-34.
Chicago/Turabian StyleRanjan Kumar Mohapatra; Haragobinda Srichandan; Snehasish Mishra; Pankaj Kumar Parhi. 2019. "Native Soil Bacteria: Potential Agent for Bioremediation." Soil Microenvironment for Bioremediation and Polymer Production , no. : 17-34.
The bioactivity and physical characteristics of CeO2 nanoparticles are significantly dependent on the type of the particle, particle size and defects. Herein, a facile and cost effective microwave-assisted combustion route was used to prepare pure CeO2 nanoparticles (NPs). The samples were thoroughly characterized by various techniques and tested as anti-cancer therapeutic agent in colon cancer. The structural investigations (X-ray Powder Diffraction) revealed the formation of single phase cubic fluorite-type structure of CeO2 with Fm-3m space group. Morphological analysis (FESEM), demonstrated the aggregation of irregular nanoparticles with grain size ~ 20–40 nm. To have more knowledge on the sample morphology, TEM and HRTEM images were taken. TEM image showed ceria NPs with squared shape and particle size in 50–95 nm range. Furthermore, HR-TEM micrographs confirmed the crystallinity of the CeO2 sample, which was explored by calculating the distance between the fringes in the corresponding Fourier transformed images. The BET specific surface area (SSA) of as-synthesized ceria nanoparticles, was observed to be 25 m2/g. UV–vis spectral analysis reveals that the direct band gap of CeO2 nanoparticles is about 2.8 eV. It was interesting to observe that, the as prepared NPs exhibit remarkable differential cytotoxicity towards healthy (BHK121, Baby Hamster Kidney cells) and human Colon cancer cells (HCT116). Nuclear fragmentation assay indicated clear DNA fragmentation in HCT116 cells, whereas intact nucleus was observed in normal cells, suggesting ceria induced apoptotic cell death in colon cancer cells. In sum, MACS generated ceria nanoparticles could uncover a new avenue in cancer therapy.
Sirish R. Panda; Rohit K. Singh; Barsharani Priyadarshini; Pragyan P. Rath; Pankaj Parhi; Trilochan Sahoo; Dindyal Mandal; Tapas Ranjan Sahoo. Nanoceria: A rare-earth nanoparticle as a promising anti-cancer therapeutic agent in colon cancer. Materials Science in Semiconductor Processing 2019, 104, 104669 .
AMA StyleSirish R. Panda, Rohit K. Singh, Barsharani Priyadarshini, Pragyan P. Rath, Pankaj Parhi, Trilochan Sahoo, Dindyal Mandal, Tapas Ranjan Sahoo. Nanoceria: A rare-earth nanoparticle as a promising anti-cancer therapeutic agent in colon cancer. Materials Science in Semiconductor Processing. 2019; 104 ():104669.
Chicago/Turabian StyleSirish R. Panda; Rohit K. Singh; Barsharani Priyadarshini; Pragyan P. Rath; Pankaj Parhi; Trilochan Sahoo; Dindyal Mandal; Tapas Ranjan Sahoo. 2019. "Nanoceria: A rare-earth nanoparticle as a promising anti-cancer therapeutic agent in colon cancer." Materials Science in Semiconductor Processing 104, no. : 104669.
Bioleaching (microbial leaching), being an economical and environmental friendly process, is investigated extensively for metal extraction from secondary solid wastes, viz., electronic wastes, spent catalyst, sludge, slag and fly ash Bioleaching using acidophiles (bacteria and archaea) is routed either by thiosulfate or polysulfide pathways through generation of ferric (Fe III) and sulphuric acid. Other microbes such as the fungi carryout bioleaching by acidolysis/complexolysis (generation of organic acids), redoxolysis and bioaccumulation method. The cyanogenic microbes in particular possess the ability to extract metal(s) by producing hydrogen cyanide. The bioleaching process is achieved by one-step, two-step and spent medium-step in batch mode or by continuous mode reported to be promising on quantitative extraction of various metals (Ni, Co, Mo, V, Fe, Zn, Cu, Cr, Cd, W, Pb and Mn). Enhanced metal extraction can be accomplished by implementing pretreatment methods like, adding a catalyst, prior adaptation of microbes, bioleaching followed by bioleaching or chemical leaching, ultrasound, and also by optimising the process parameters. Additionally, the use of small size waste particles, low pH, low solid concentration and higher operating temperature could also enhance metal leaching to considerable extent. The review compiles extensive studies on treatment of secondary solid wastes employing chemolithotrophs (acidophiles) and organotrophs (fungi and cynogens) for metal extraction. The mechanism of bioleaching, candidate microbes, metal extraction efficiency, operational strategies and process improvement are extensively reviewed, discussed and reported.
Haragobinda Srichandan; Ranjan Kumar Mohapatra; Pankaj Kumar Parhi; Snehasish Mishra. Bioleaching approach for extraction of metal values from secondary solid wastes: A critical review. Hydrometallurgy 2019, 189, 105122 .
AMA StyleHaragobinda Srichandan, Ranjan Kumar Mohapatra, Pankaj Kumar Parhi, Snehasish Mishra. Bioleaching approach for extraction of metal values from secondary solid wastes: A critical review. Hydrometallurgy. 2019; 189 ():105122.
Chicago/Turabian StyleHaragobinda Srichandan; Ranjan Kumar Mohapatra; Pankaj Kumar Parhi; Snehasish Mishra. 2019. "Bioleaching approach for extraction of metal values from secondary solid wastes: A critical review." Hydrometallurgy 189, no. : 105122.
A highly lead(II) resistant (up to 2200 mg/l) bacterium PbRPSD202 was selected among 210 lead resistant bacteria isolated from marine environment of Paradeep Port, Odisha for possible biosoption of toxic Pb (II) ions from metals polluted environments. The bacterium was identified as Bacillus xiamenensis following the phenotypic as well as 16S rRNA gene sequence analysis. In addition to Pb(II), it also showed resistance towards other heavy metals like Cd(II), Cr(VI), As(III), Cu(II), Ni(II) and Zn(II). Batch biosorption of Pb(II) using both live and dead biomass of this strain was investigated under different operational parametric conditions such as pH, temperature, NaCl concentration, shaking speed, treatment time, biomass concentration and initial Pb(II) concentration. The maximum Pb(II) uptake of 216.75 and 207.4 mg/g biomass was obtained with live and dead biomass, respectively, at the optimum condition (4% w/v NaCl, pH 6.0, 35 °C, 140 rpm and 1 g/l biosorbent dose). Both active as well as passive Pb(II) bio-sorption process showed best fit with the pseudo-second-order kinetic model. The sorption mechanism was favoured with Langmuir isotherm model indicating monolayer type adsorption. FTIR and FESEM-EDX analysis further ensured the possible interactions of Pb(II) with bacterial cell surface ligands like hydroxyl, carbonyl, carboxyl and amine groups during surface adsorption. TEM analysis revealed the intracellular accumulation of lead ions. This investigation highlights the potential application of this bacterium for bioremediation of lead(II) from the multiple metals contaminated saline environment through biosorption.
Ranjan Kumar Mohapatra; Pankaj Kumar Parhi; Sony Pandey; Birendra Kumar Bindhani; Hrudayanath Thatoi; Chitta Ranjan Panda. Active and passive biosorption of Pb(II)using live and dead biomass of marine bacterium Bacillus xiamenensis PbRPSD202: Kinetics and isotherm studies. Journal of Environmental Management 2019, 247, 121 -134.
AMA StyleRanjan Kumar Mohapatra, Pankaj Kumar Parhi, Sony Pandey, Birendra Kumar Bindhani, Hrudayanath Thatoi, Chitta Ranjan Panda. Active and passive biosorption of Pb(II)using live and dead biomass of marine bacterium Bacillus xiamenensis PbRPSD202: Kinetics and isotherm studies. Journal of Environmental Management. 2019; 247 ():121-134.
Chicago/Turabian StyleRanjan Kumar Mohapatra; Pankaj Kumar Parhi; Sony Pandey; Birendra Kumar Bindhani; Hrudayanath Thatoi; Chitta Ranjan Panda. 2019. "Active and passive biosorption of Pb(II)using live and dead biomass of marine bacterium Bacillus xiamenensis PbRPSD202: Kinetics and isotherm studies." Journal of Environmental Management 247, no. : 121-134.
A facile microwave-assisted combustion method was adopted to synthesize pure ZnO and Mg-doped ZnO nanoparticles (NPs), and characterization of the NPs and the sorption behavior with Congo Red (CR) Azo dye was extensively investigated. The structure, morphology and chemical assay of the synthesized NPs were studied with respect to the pure and 2% Mg-doped ZnO samples. The X-ray diffraction pattern confirmed the presence of crystalline, cubic phase with fluorite structure of both the NPs. The morphological differences between the pure and Mg-doped ZnO NPs were evaluated by FE-SEM, which revealed that the NPs were in the nanoscale regime with irregular crystalline morphology having a grain size of ~18–45 nm. N2 adsorption/desorption isotherms measured at −196 °C suggested a Type II structure with limited hysteresis loops, likely due to some interparticle porosity. The BET SSA ZnO NPs obtained was found to be 32 m2 g−1, indicating about its potential in sorption processes. Batch adsorption study for the removal of CR carried out showed that, the Mg-doped NPs showed higher loading efficiency (125 mg·g−1) than the ZnO NPs (25 mg·g−1) counterpart. This was corroborated by the isotherm results in which the CR dye sorption followed a Freundlich Isotherm model for both undoped ZnO and Mg-doped ZnO NPs. The sorption of CR dye followed a pseudo-second order kinetics. The negative ΔG° (−31.91 and −109.41 kJ mol−1) showed the feasibility of the adsorption process. The ΔH° was determined as +13.74 kJ mol−1 and 50.7 kJ mol−1 for ZnO NPs and Mg doped-ZnO NPs respectively, confirming the endothermic nature of the adsorption for removing CR dye from the solution.
P.P. Rath; S.S. Behera; B. Priyadarshini; S.R. Panda; D. Mandal; T. Sahoo; S. Mishra; P.K. Parhi. Influence of Mg doping on ZnO NPs for enhanced adsorption activity of Congo Red dye. Applied Surface Science 2019, 491, 256 -266.
AMA StyleP.P. Rath, S.S. Behera, B. Priyadarshini, S.R. Panda, D. Mandal, T. Sahoo, S. Mishra, P.K. Parhi. Influence of Mg doping on ZnO NPs for enhanced adsorption activity of Congo Red dye. Applied Surface Science. 2019; 491 ():256-266.
Chicago/Turabian StyleP.P. Rath; S.S. Behera; B. Priyadarshini; S.R. Panda; D. Mandal; T. Sahoo; S. Mishra; P.K. Parhi. 2019. "Influence of Mg doping on ZnO NPs for enhanced adsorption activity of Congo Red dye." Applied Surface Science 491, no. : 256-266.
A novel strategy for wastewater recycling by removing Chromium [Cr(III)] from water, utilizing the treated water for agricultural purposes and the saturated adsorbent used as the catalyst for p-nitrophenol reduction was successfully incorporated for sustainable environmental application. Removal of Cr(III) by adsorption on Cymbopogon flexuosus waste material entrapped within sodium alginate beads was investigated. Sorption behavior of Cr(III) on to the biosorbent phase showed to follow pseudo first order kinetic model. The thermodynamic variables such as ∆G (−2.59 kJ mol−1), ∆H (4.57 kJ mol−1) & ∆S (0.024 J mol−1 K−1) was evaluated and the corresponding values ensure on favoring endothermic nature of adsorption. Isotherm studies strongly supports on Freundlich model (R2 = 0.99) rather than Langmuir isotherm model (R2 = 0.93), Temkin (R2 = 0.89) and Dubinin-Radushkevich (R2 = 0.77) confirming on multilayer chemisorption behaviour with immobilized Cymbopogon flexuosus having the maximum loading capacity of 121.64 mg.g−1. The sorption of Cr(III) by immobilized Cymbopogon flexuosus was quantitative (99.9%) at the optimum condition: Cr(III) concentration:50 ppm, pH:4.5, agitation speed:150 rpm, temp.:298 K. The above sorption mechanism was well supported by the intraparticle diffusion model. Response Surface Methodology (RSM) was also introduced to investigate for optimization of process parameters during removal of Cr(III) from aqueous solution. The adsorbent material saturated with Cr(III) ascertained first order kinetics with kapp value of 2.5 × 10−1 min−1 for catalytic reduction of toxic p-nitrophenol to p-aminophenol. The phytotoxicity study of treated water on Zea mays plant has been analyzed and a considerable result obtained with regards to the usage of Cr(III) contaminated-water in plant growth. The change in the crystal structure, surface morphology and surface functional groups of the adsorbent before and after the process was analyzed and well ascertained by XRD, SEM and FTIR analysis. This investigation suggests the possible application of this low-cost material in fine chemical manufacturing.
Aradhana Basu; Saroj Sekhar Behera; Suchintak Dash; Shirsendu Banerjee; Sanjay Sarkar; Chinmaya Kumar Mohanty; Nabin Kumar Dhal; Pankaj Kumar Parhi; Suraj K. Tripathy. A study on removal of Cr(III) from aqueous solution using biomass of Cymbopogon flexuosus immobilized in sodium alginate beads and its use as hydrogenation catalyst. Journal of the Taiwan Institute of Chemical Engineers 2019, 102, 118 -132.
AMA StyleAradhana Basu, Saroj Sekhar Behera, Suchintak Dash, Shirsendu Banerjee, Sanjay Sarkar, Chinmaya Kumar Mohanty, Nabin Kumar Dhal, Pankaj Kumar Parhi, Suraj K. Tripathy. A study on removal of Cr(III) from aqueous solution using biomass of Cymbopogon flexuosus immobilized in sodium alginate beads and its use as hydrogenation catalyst. Journal of the Taiwan Institute of Chemical Engineers. 2019; 102 ():118-132.
Chicago/Turabian StyleAradhana Basu; Saroj Sekhar Behera; Suchintak Dash; Shirsendu Banerjee; Sanjay Sarkar; Chinmaya Kumar Mohanty; Nabin Kumar Dhal; Pankaj Kumar Parhi; Suraj K. Tripathy. 2019. "A study on removal of Cr(III) from aqueous solution using biomass of Cymbopogon flexuosus immobilized in sodium alginate beads and its use as hydrogenation catalyst." Journal of the Taiwan Institute of Chemical Engineers 102, no. : 118-132.
S.S. Behera; Subhendu K. Panda; D. Mandal; P.K. Parhi. Ultrasound and Microwave assisted leaching of neodymium from waste magnet using organic solvent. Hydrometallurgy 2019, 185, 61 -70.
AMA StyleS.S. Behera, Subhendu K. Panda, D. Mandal, P.K. Parhi. Ultrasound and Microwave assisted leaching of neodymium from waste magnet using organic solvent. Hydrometallurgy. 2019; 185 ():61-70.
Chicago/Turabian StyleS.S. Behera; Subhendu K. Panda; D. Mandal; P.K. Parhi. 2019. "Ultrasound and Microwave assisted leaching of neodymium from waste magnet using organic solvent." Hydrometallurgy 185, no. : 61-70.
Ureas and thioureas, otherwise known as carbamides and thiocarbamides, respectively, are rich sources of nitrogen. Urea has a wide range of applications in agriculture, the chemical industry, and automobile systems, and is an important chemical in medical uses. Thiourea, an organosulfur compound, has long been known as an important reagent in organic synthesis, and has been employed in textile processing, used as a source of sulphides, and acts as a precursor in the synthesis of several heterocyclic compounds. The exceptional ligating properties of these compounds enable them to form a large number of complex compounds with transition metals, a vast majority of which find abundant applications in potential areas. This has stimulated researchers to explore novel applications of the synthesized ligands and the metal complexes thereof. This review presents a report of the studies on the biological activities, sensor properties, opical nonlinear properties, corrosion inhibitior potential, and catalytic activities of these compounds and their metal complexes.
Ranjan K. Mohapatra; Pradeep K. Das; Manoj K. Pradhan; Marei M. El-Ajaily; Debadutta Das; Halima F. Salem; Umakanta Mahanta; Gouranga Badhei; Pankaj Parhi; Abdussalam A. Maihub; Kudrat -E-Zahan. Recent Advances in Urea- and Thiourea-Based Metal Complexes: Biological, Sensor, Optical, and Corroson Inhibition Studies. Comments on Inorganic Chemistry 2019, 39, 127 -187.
AMA StyleRanjan K. Mohapatra, Pradeep K. Das, Manoj K. Pradhan, Marei M. El-Ajaily, Debadutta Das, Halima F. Salem, Umakanta Mahanta, Gouranga Badhei, Pankaj Parhi, Abdussalam A. Maihub, Kudrat -E-Zahan. Recent Advances in Urea- and Thiourea-Based Metal Complexes: Biological, Sensor, Optical, and Corroson Inhibition Studies. Comments on Inorganic Chemistry. 2019; 39 (3):127-187.
Chicago/Turabian StyleRanjan K. Mohapatra; Pradeep K. Das; Manoj K. Pradhan; Marei M. El-Ajaily; Debadutta Das; Halima F. Salem; Umakanta Mahanta; Gouranga Badhei; Pankaj Parhi; Abdussalam A. Maihub; Kudrat -E-Zahan. 2019. "Recent Advances in Urea- and Thiourea-Based Metal Complexes: Biological, Sensor, Optical, and Corroson Inhibition Studies." Comments on Inorganic Chemistry 39, no. 3: 127-187.
The present study involves the stabilization and rheological behavior of a fly ash samples in the presence of a low cost natural dispersant saponin isolated from a plant Acacia concinna. The critical micellar concentration of the surfactant was measured and it was found to be 0.019g per cc. The rheological characteristics of the slurry had been analyzed by variation of saponin concentration, ash concentration and temperature. The data obtained were best fitted by Bingham plastic model in the studied ranges of concentrations 50–65%. Addition of the surfactant to the slurry reduced the surface tension of the dispersing medium water which increased wettability of the fly ash particles and reduced particle-particle interaction. Decreases in zeta potential measurement conformed that stabilization fly ash slurry is mainly due to the steric factor.
Swetashree Pattanaik; Pankaj Kumar Parhi; Debadutta Das; Akshaya Kumar Samal. Acacia concinna: A natural dispersant for stabilization and transportation of fly ash-water slurry. Journal of the Taiwan Institute of Chemical Engineers 2019, 99, 193 -200.
AMA StyleSwetashree Pattanaik, Pankaj Kumar Parhi, Debadutta Das, Akshaya Kumar Samal. Acacia concinna: A natural dispersant for stabilization and transportation of fly ash-water slurry. Journal of the Taiwan Institute of Chemical Engineers. 2019; 99 ():193-200.
Chicago/Turabian StyleSwetashree Pattanaik; Pankaj Kumar Parhi; Debadutta Das; Akshaya Kumar Samal. 2019. "Acacia concinna: A natural dispersant for stabilization and transportation of fly ash-water slurry." Journal of the Taiwan Institute of Chemical Engineers 99, no. : 193-200.
P. P. Rath; B. Priyadarshini; S. S. Behera; P. K. Parhi; S. R. Panda; T. R. Sahoo. Adsorptive removal of Congo Red dye from aqueous solution using TiO2 nanoparticles: Kinetics, thermodynamics and isothermal insights. DAE SOLID STATE PHYSICS SYMPOSIUM 2018 2019, 1 .
AMA StyleP. P. Rath, B. Priyadarshini, S. S. Behera, P. K. Parhi, S. R. Panda, T. R. Sahoo. Adsorptive removal of Congo Red dye from aqueous solution using TiO2 nanoparticles: Kinetics, thermodynamics and isothermal insights. DAE SOLID STATE PHYSICS SYMPOSIUM 2018. 2019; ():1.
Chicago/Turabian StyleP. P. Rath; B. Priyadarshini; S. S. Behera; P. K. Parhi; S. R. Panda; T. R. Sahoo. 2019. "Adsorptive removal of Congo Red dye from aqueous solution using TiO2 nanoparticles: Kinetics, thermodynamics and isothermal insights." DAE SOLID STATE PHYSICS SYMPOSIUM 2018 , no. : 1.
Pankaj Parhi; Saroj Sekhar Behera; Ranjan Kumar Mohapatra; Tapas Ranjan Sahoo; Debadutta Das; Pramila Kumari Misra. Separation and recovery of Sc(III) from Mg–Sc alloy scrap solution through hollow fiber supported liquid membrane (HFLM) process supported by Bi-functional ionic liquid as carrier. Separation Science and Technology 2018, 54, 1478 -1488.
AMA StylePankaj Parhi, Saroj Sekhar Behera, Ranjan Kumar Mohapatra, Tapas Ranjan Sahoo, Debadutta Das, Pramila Kumari Misra. Separation and recovery of Sc(III) from Mg–Sc alloy scrap solution through hollow fiber supported liquid membrane (HFLM) process supported by Bi-functional ionic liquid as carrier. Separation Science and Technology. 2018; 54 (9):1478-1488.
Chicago/Turabian StylePankaj Parhi; Saroj Sekhar Behera; Ranjan Kumar Mohapatra; Tapas Ranjan Sahoo; Debadutta Das; Pramila Kumari Misra. 2018. "Separation and recovery of Sc(III) from Mg–Sc alloy scrap solution through hollow fiber supported liquid membrane (HFLM) process supported by Bi-functional ionic liquid as carrier." Separation Science and Technology 54, no. 9: 1478-1488.
Synthesis of Ag/CaCO3 nanocomposites was accomplished by a two step technique. CaCO3 nanoparticles were synthesized by ultrasound assisted precipitation technique followed by deposition of silver via bio-inspired technique using a bio-reductant obtained from Andrographis paniculata and Aloe vera. X-ray diffraction pattern has confirmed the formation of CaCO3 with Calcite phase along with few minor peaks of Vaterite and Ag with face-centered cubic structure. Electron microscopy analysis has indicated the deposition of Ag nanopaticles on CaCO3. Resulting material was studied as catalyst for the reduction of 4-nitrophenol. The efficiency of the nanocomposites was found to be 10 fold higher than that of Ag nanoparticles and remained nearly unaltered for three consecutive cycles. Developed material is expected to be a potential catalyst candidate for environmental applications.
Suchintak Dash; Sourav Das; Imran Khan; Sayantan Sinha; Bhaskar Das; R. Jayabalan; Pankaj Parhi; Suraj K. Tripathy. Sonochemically synthesized Ag/CaCO3 nanocomposites: A highly efficient reusable catalyst for reduction of 4-nitrophenol. Materials Chemistry and Physics 2018, 220, 409 -416.
AMA StyleSuchintak Dash, Sourav Das, Imran Khan, Sayantan Sinha, Bhaskar Das, R. Jayabalan, Pankaj Parhi, Suraj K. Tripathy. Sonochemically synthesized Ag/CaCO3 nanocomposites: A highly efficient reusable catalyst for reduction of 4-nitrophenol. Materials Chemistry and Physics. 2018; 220 ():409-416.
Chicago/Turabian StyleSuchintak Dash; Sourav Das; Imran Khan; Sayantan Sinha; Bhaskar Das; R. Jayabalan; Pankaj Parhi; Suraj K. Tripathy. 2018. "Sonochemically synthesized Ag/CaCO3 nanocomposites: A highly efficient reusable catalyst for reduction of 4-nitrophenol." Materials Chemistry and Physics 220, no. : 409-416.