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Singh PDD, Murthy ZVP, Kailasa SK. Zinc nitride quantum dots as an efficient probe for simultaneous fluorescence detection of Cu 2+ and Mn 2+ ions in water samples. Mikrochim Acta 2024; 191:161. [PMID: 38411697 DOI: 10.1007/s00604-024-06247-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/04/2024] [Indexed: 02/28/2024]
Abstract
The exceptional ascending heights of graphene (carbon) and boron nitride nanostructures have invited scientists to explore metal nitride nanomaterials. Herein, Zn3N2 quantum dots (QDs) were prepared via a simple hydrothermal route from the reaction between zinc nitrate hexahydrate and ammonia solution that possess efficient strength towards sensing applications of metal ions (Cu2+ and Mn2+). The as-prepared Zn3N2 QDs show bright fluorescence, displaying an emission peak at 408 nm upon excitation at 320 nm, with a quantum yield (QY) of 29.56%. It was noticed that the fluorescence intensity of Zn3N2 QDs linearly decreases with the independent addition of Cu2+ and Mn2+ ions, displaying good linearity in the ranges 2.5-50 µM and 0.05-5 µM with detection limits of 21.77 nM and of 63.82 nM for Cu2+ and Mn2+ ions, respectively. The probe was successfully tested for quantifying Cu2+ and Mn2+ in real samples including river, canal, and tap water, providing good recoveries with a relative standard deviation < 2%. Furthermore, the masking proposition can successfully eliminate the interference if the two metal ions exist together. It was found that thiourea is efficiently able to mask Cu2+ and selectively quenches Mn2+, and L-cysteine is able to halt the quenching potential of Mn2+ and is selectively able to sense Cu2+. The Zn3N2 QDs provide a simple way for the simultaneous detection of both Cu2+ and Mn2+ ions in environmental samples at low sample preparations requirements.
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Affiliation(s)
- Pooja Dharni Dhar Singh
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India
| | - Z V P Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India
| | - Suresh Kumar Kailasa
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India.
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Nayak S, Borse S, Jha S, Mehta VN, Murthy ZVP, Park TJ, Kailasa SK. Development of Copper Nanoclusters-Based Turn-Off Nanosensor for Fluorescence Detection of Two Pyrethroid Pesticides (Cypermethrin and Lambda-Cyhalothrin). J Fluoresc 2023:10.1007/s10895-023-03537-0. [PMID: 38109031 DOI: 10.1007/s10895-023-03537-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 11/30/2023] [Indexed: 12/19/2023]
Abstract
Fluorescent copper nanoclusters (Cu NCs) were synthesized by using Withania somnifera (W. somnifera) plant extract as a biotemplate. Aqueous dispersion of W. somnifera-Cu NCs displays intense emission peak at 458 nm upon excitation at 350 nm. This fluorescence emission was utilized for the detection of two pyrethroid pesticides (cypermethrin and lambda-cyhalothrin) via "turn-off" mechanism. Upon the addition of two pyrethiod pesticides independently, the fluorescence emission of W. somnifera-Cu NCs was gradually decreased with increasing concentrations of both pesticides. It was noticed that the decrease in emission intensity at 458 nm was linearly dependent on the logarithm of both pesticides concentrations in the ranges of 0.01-100 μM and of 0.05-100 μM for cypermethrin and lambda-cyhalothrin, respectively. Consequently, the limits of detection were found to be 27.06 and 23.28 nM for cypermethrin and lambda-cyhalothrin, respectively. The as-fabricated W. somnifera-Cu NCs acted as a facile sensor for the analyses of cypermethrin and lambda-cyhalothrin in vegetables (tomato and bottle gourd), which demonstrates that it could be used as portable sensing platform for assaying of two pyrethroid pesticides in food samples.
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Affiliation(s)
- Satyaprakash Nayak
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India
| | - Shraddha Borse
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India
| | - Sanjay Jha
- ASPEE SHAKILAM Biotechnology Institute, Navsari Agricultural University, Surat, 395007, Gujarat, India
| | - Vaibhavkumar N Mehta
- ASPEE SHAKILAM Biotechnology Institute, Navsari Agricultural University, Surat, 395007, Gujarat, India
| | - Z V P Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India
| | - Tae Jung Park
- Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Suresh Kumar Kailasa
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India.
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Borse S, Rafique R, Murthy ZVP, Park TJ, Kailasa SK. Applications of upconversion nanoparticles in analytical and biomedical sciences: a review. Analyst 2022; 147:3155-3179. [PMID: 35730445 DOI: 10.1039/d1an02170b] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Lanthanide-doped upconversion nanoparticles (UCNPs) have gained more attention from researchers due to their unique properties of photon conversion from an excitation/incident wavelength to a more suitable emission wavelength at a designated site, thus improving the scope in the life sciences field. Due to their fascinating and unique optical properties, UCNPs offer attractive opportunities in theranostics for early diagnostics and treatment of deadly diseases such as cancer. Also, several efforts have been made on emerging approaches for the fabrication and surface functionalization of luminescent UCNPs in optical biosensing applications using various infrared excitation wavelengths. In this review, we discussed the recent advancements of UCNP-based analytical chemistry approaches for sensing and theranostics using a 980 nm laser as the excitation source. The key analytical merits of UNCP-integrated fluorescence analytical approaches for assaying a wide variety of target analytes are discussed. We have described the mechanisms of the upconversion (UC) process, and the application of surface-modified UCNPs for in vitro/in vivo bioimaging, photodynamic therapy (PDT), and photothermal therapy (PTT). Based on the latest scientific achievements, the advantages and disadvantages of UCNPs in biomedical and optical applications are also discussed to overcome the shortcomings and to improve the future study directions. This review delivers beneficial practical information of UCNPs in the past few years, and insights into their research in various fields are also discussed precisely.
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Affiliation(s)
- Shraddha Borse
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat - 395007, Gujarat, India.
| | - Rafia Rafique
- Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea.
| | - Z V P Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India
| | - Tae Jung Park
- Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea.
| | - Suresh Kumar Kailasa
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat - 395007, Gujarat, India.
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Borse S, Jha S, Murthy ZVP, Kailasa SK. Sustainable chemistry approach for the preparation of bluish green emissive copper nanoclusters from Justicia adhatoda leaves extract: a facile analytical approach for the sensing of myoglobin and l-thyroxine. NEW J CHEM 2022. [DOI: 10.1039/d2nj02524h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sustainable chemistry approach for synthesis of fluorescent copper nanoclusters for sensing of myoglobin and l-thyroxine.
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Affiliation(s)
- Shraddha Borse
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, India
| | - Sanjay Jha
- ASPEE Shakilam Biotechnology Institute, Navsari Agricultural University, Surat 39500, Gujarat, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat 395007, India
| | - Suresh Kumar Kailasa
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, India
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Kailasa SK, Mehta VN, Koduru JR, Basu H, Singhal RK, Murthy ZVP, Park TJ. An overview of molecular biology and nanotechnology based analytical methods for the detection of SARS-CoV-2: promising biotools for the rapid diagnosis of COVID-19. Analyst 2021. [PMID: 33543178 DOI: 10.1039/d0an01528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Currently, the 2019 novel coronavirus (2019-nCoV) is drastically affecting 214 countries, causing severe pneumonia in patients, which has resulted in lockdown being implemented in several countries to stop its local transmission. Considering this, the rapid screening and accurate detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; 2019-nCoV) play an essential role in the diagnosis of COVID-19, which can minimize local transmission and prevent an epidemic. Due to this public health emergency, the development of ultra-fast reliable diagnostic kits is essential for the diagnosis of COVID-19. Recently, molecular biology and nanotechnology based analytical methods have proven to be promising diagnostic tools for the rapid screening of 2019-nCoV with high accuracy and precision. The main aim of this review is to provide a retrospective overview on the molecular biology tools (reverse transcription polymerase chain reaction (RT-PCR) and reverse transcription loop-mediated isothermal amplification (RT-LAMP)) and nanotechnology based analytical tools (enzyme-linked immunosorbent assay (ELISA), RT-PCR, and lateral flow assay) for the rapid diagnosis of COVID-19. This review also presents recent reports on other analytical techniques including paper spray mass spectrometry for the diagnosis of COVID-19 in clinical samples. Finally, we provide a quick reference on molecular biology and nanotechnology based analytical tools for COVID-19 diagnosis in clinical samples.
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Affiliation(s)
- Suresh Kumar Kailasa
- Department of Chemistry, S. V. National Institute of Technology, Surat - 395007, Gujarat, India.
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Kailasa SK, Mehta VN, Koduru JR, Basu H, Singhal RK, Murthy ZVP, Park TJ. An overview of molecular biology and nanotechnology based analytical methods for the detection of SARS-CoV-2: promising biotools for the rapid diagnosis of COVID-19. Analyst 2021; 146:1489-1513. [PMID: 33543178 DOI: 10.1039/d0an01528h] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Currently, the 2019 novel coronavirus (2019-nCoV) is drastically affecting 214 countries, causing severe pneumonia in patients, which has resulted in lockdown being implemented in several countries to stop its local transmission. Considering this, the rapid screening and accurate detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; 2019-nCoV) play an essential role in the diagnosis of COVID-19, which can minimize local transmission and prevent an epidemic. Due to this public health emergency, the development of ultra-fast reliable diagnostic kits is essential for the diagnosis of COVID-19. Recently, molecular biology and nanotechnology based analytical methods have proven to be promising diagnostic tools for the rapid screening of 2019-nCoV with high accuracy and precision. The main aim of this review is to provide a retrospective overview on the molecular biology tools (reverse transcription polymerase chain reaction (RT-PCR) and reverse transcription loop-mediated isothermal amplification (RT-LAMP)) and nanotechnology based analytical tools (enzyme-linked immunosorbent assay (ELISA), RT-PCR, and lateral flow assay) for the rapid diagnosis of COVID-19. This review also presents recent reports on other analytical techniques including paper spray mass spectrometry for the diagnosis of COVID-19 in clinical samples. Finally, we provide a quick reference on molecular biology and nanotechnology based analytical tools for COVID-19 diagnosis in clinical samples.
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Affiliation(s)
- Suresh Kumar Kailasa
- Department of Chemistry, S. V. National Institute of Technology, Surat - 395007, Gujarat, India.
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Kamble AR, Patel CM, Murthy ZVP. Polyethersulfone based MMMs with 2D materials and ionic liquid for CO 2, N 2 and CH 4 separation. J Environ Manage 2020; 262:110256. [PMID: 32090882 DOI: 10.1016/j.jenvman.2020.110256] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 02/07/2020] [Accepted: 02/09/2020] [Indexed: 06/10/2023]
Abstract
Increasing concerns on global warming and climate change have led to numerous attempts on developing new membrane materials to reduce excessive CO2 emission into the atmosphere. In the present work, we focused on the separation of CO2 from gas mixtures through two-dimensional (2D) materials based mixed matrix membranes (MMMs). The ionic liquid (IL) 1-Ethyl-3methylimidazolium bis (trifluoromethylsulfonyl) imide together with different weight fractions (0.5-1.5 wt %) 2D materials, such as molybdenum disulfide (MoS2) and hexagonal boron nitride (h-BN), were homogenously blended to prepare polyether sulfone (PES) MMMs. The main aim was to investigate the effect of the addition of 2D materials on the gas separation/permeation properties of the PES membranes. Pure gas permeation for N2, CO2, and CH4 and binary gas mixtures separation for CO2/N2 and CO2/CH4 were investigated through pure PES and modified PES membranes. The prepared membranes were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and water contact angle tests. The gas permeabilities were found to be improved by average 15-20 times higher compared to pure PES. The [Formula: see text] and [Formula: see text] were improved up to 124% and 18% using PES/h-BN (1 wt %)/IL and PES/MoS2 (1.5 wt %)/IL combination, respectively. In overall, 2D materials and IL together as a filler into PES matrix revealed a significant improvement in the gas separation/permeation properties of PES and can be considered as a competent membrane for CO2/CH4 and CO2/N2 separation.
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Affiliation(s)
- Ashwin R Kamble
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India
| | - Chetan M Patel
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India
| | - Z V P Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India.
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Ghosh S, Bhamore JR, Malek NI, Murthy ZVP, Kailasa SK. Trypsin mediated one-pot reaction for the synthesis of red fluorescent gold nanoclusters: Sensing of multiple analytes (carbidopa, dopamine, Cu 2+, Co 2+ and Hg 2+ ions). Spectrochim Acta A Mol Biomol Spectrosc 2019; 215:209-217. [PMID: 30840923 DOI: 10.1016/j.saa.2019.02.078] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/08/2018] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
Herein, we fabricated fluorescent gold nanoclusters (Au NCs) by using trypsin as a ligand. The fabricated trypsin-Au NCs emit bright red color fluorescence upon the exposure of 365 nm UV light. The trypsin-Au NCs are stable and well dispersed in water, which exhibited strong red emission peak at 665 nm upon excitation wavelength of 520 nm. The red fluorescence of trypsin-Au NCs was greatly quenched by the addition of multiple analytes such as drugs (carbidopa and dopamine) and three divalent metal ions (Cu2+, Co2+ and Hg2+ ion). As a result, a novel fluorescence "turn-off" probe was developed for the detection of the above analytes with good selectivity and sensitivity. This method exhibits the detection limits for carbidopa, dopamine, Cu2+, Co2+ and Hg2+ ions are 6.5, 0.14, 5.2, 0.0078, and 0.005 nM, respectively. The trypsin-Au NCs were successfully applied to detect drugs (carbidopa, and dopamine) in pharmaceutical samples and metal ions (Cu2+, Co2+ and Hg2+ ion) in biofluids and water samples, exhibiting good precision and accuracy, which offers a facile analytical strategy for assaying of the above analytes in pharmaceutical and biological samples.
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Affiliation(s)
- Subhadeep Ghosh
- Department of Applied Chemistry, S. V. National Institute of Technology, Surat 395 007, India
| | - Jigna R Bhamore
- Department of Applied Chemistry, S. V. National Institute of Technology, Surat 395 007, India
| | - Naved I Malek
- Department of Applied Chemistry, S. V. National Institute of Technology, Surat 395 007, India
| | - Z V P Murthy
- Chemical Engineering Department, S. V. National Institute of Technology, Surat 395 007, India
| | - Suresh Kumar Kailasa
- Department of Applied Chemistry, S. V. National Institute of Technology, Surat 395 007, India.
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Kamble AR, Patel CM, Murthy ZVP. Effects of inorganic additive of two-dimensional hexagonal boron nitride on the gas separation/permeation for PVDF-derived membranes. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1577451] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ashwin R. Kamble
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
| | - Chetan M. Patel
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
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Affiliation(s)
- Jignasa Vimal Gohel
- Department of Chemical Engineering, S. V. National Institute of Technology, Surat, Gujarat, India
| | - Preeti Sheshmani Mishra
- Department of Chemical Engineering, S. V. National Institute of Technology, Surat, Gujarat, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering, S. V. National Institute of Technology, Surat, Gujarat, India
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Affiliation(s)
- Ashwin R. Kamble
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India
| | - Chetan M. Patel
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India
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Bhamore JR, Jha S, Basu H, Singhal RK, Murthy ZVP, Kailasa SK. Tuning of gold nanoclusters sensing applications with bovine serum albumin and bromelain for detection of Hg 2+ ion and lambda-cyhalothrin via fluorescence turn-off and on mechanisms. Anal Bioanal Chem 2018; 410:2781-2791. [PMID: 29480389 DOI: 10.1007/s00216-018-0958-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 02/05/2018] [Accepted: 02/09/2018] [Indexed: 02/06/2023]
Abstract
Herein, fluorescent gold nanoclusters (Au NCs) were obtained by one-pot synthetic method using bovine serum albumin (BSA) and bromelain as templates. As-synthesized fluorescent Au NCs were stable and showed bright red fluorescence under UV lamp at 365 nm. The fluorescent Au NCs exhibit the emission intensity at 648 nm when excited at 498 nm. Various techniques were used such as spectroscopy (UV-visible, fluorescence, and Fourier-transform infrared), high-resolution transmission electron microscopy, and dynamic light scattering for the characterization of fluorescent Au NCs. The values of I0/I at 648 nm are proportional to the concentrations of Hg2+ ion in the range from 0.00075 to 5.0 μM and of lambda-cyhalothrin in the range from 0.01 to 10 μM with detection limits of 0.0003 and 0.0075 μM for Hg2+ ion and lambda-cyhalothrin, respectively. The practical application of the probe was successfully demonstrated by analyzing Hg2+ ion and lambda-cyhalothrin in water samples. In addition, Au NCs used as probes for imaging of Simplicillium fungal cells. These results indicated that the as-synthesized Au NCs have proven to be promising fluorescent material for the sensing of Hg2+ ion and lambda-cyhalothrin in environmental and for imaging of microorganism cells in biomedical applications.
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Affiliation(s)
- Jigna R Bhamore
- Department of Applied Chemistry, S. V. National Institute of Technology, Surat, Gujarat, 395 007, India
| | - Sanjay Jha
- Gujarat Agricultural Biotechnology Institute, Navsari Agricultural University, Surat, Gujarat, 395007, India
| | - Hirakendu Basu
- Analytical Chemistry Division, Bhabha Atomic Research Center, Trombay, Mumbai, Maharashtra, 400085, India
| | - Rakesh Kumar Singhal
- Analytical Chemistry Division, Bhabha Atomic Research Center, Trombay, Mumbai, Maharashtra, 400085, India
| | - Z V P Murthy
- Chemical Engineering Department, S. V. National Institute of Technology, Surat, Gujarat, 395 007, India
| | - Suresh Kumar Kailasa
- Department of Applied Chemistry, S. V. National Institute of Technology, Surat, Gujarat, 395 007, India.
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Bhamore JR, Deshmukh B, Haran V, Jha S, Singhal RK, Lenka N, Kailasa SK, Murthy ZVP. One-step eco-friendly approach for the fabrication of synergistically engineered fluorescent copper nanoclusters: sensing of Hg2+ ion and cellular uptake and bioimaging properties. NEW J CHEM 2018. [DOI: 10.1039/c7nj04031h] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Schematic illustration for one-step green synthetic approach for fabrication of synergistically engineered CuNCs.
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Affiliation(s)
- Jigna R. Bhamore
- Department of Applied Chemistry
- S. V. National Institute of Technology
- Surat – 395 007
- India
| | - Balaji Deshmukh
- National Center for Cell Science
- NCCS Complex
- Pune University Campus
- Pune – 411 007
- India
| | - Varun Haran
- National Center for Cell Science
- NCCS Complex
- Pune University Campus
- Pune – 411 007
- India
| | - Sanjay Jha
- Gujarat Agricultural Biotechnology Institute
- Navsari Agricultural University
- Surat – 395007
- India
| | | | - Nibedita Lenka
- National Center for Cell Science
- NCCS Complex
- Pune University Campus
- Pune – 411 007
- India
| | - Suresh Kumar Kailasa
- Department of Applied Chemistry
- S. V. National Institute of Technology
- Surat – 395 007
- India
| | - Z. V. P. Murthy
- Chemical Engineering Department
- S. V. National Institute of Technology
- Surat – 395007
- India
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Affiliation(s)
- Saurabh C. Singh
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
- Fibre Research Center, Birla Cellulosic, Kharach, Bharuch, Gujarat, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
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Patel CM, Chakraborty M, Murthy ZVP. Influence of pH on the Stability of Alumina and Silica Nanosuspension Produced by Wet Grinding. Particulate Science and Technology 2015. [DOI: 10.1080/02726351.2014.978425] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sharma S, Mukhopadhyay M, Murthy ZVP. Investigation of photo-assisted and crude peroxidase mediated transformations of chlorinated phenols (CPs) from spiked and industrial wastewaters: identification of reaction products. Water Sci Technol 2015; 72:746-753. [PMID: 26287833 DOI: 10.2166/wst.2015.269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This work focused on photo-assisted crude peroxidase mediated transformations of chlorinated phenols (CPs) from spiked and industrial wastewaters and the identification of reaction products formed. Garden radish Raphanus sativus was the source of crude peroxidase. No chlorine bearing compounds were detected by gas chromatography-high resolution mass spectrometry analysis. Under identical test conditions, the concentrations of 4-chlorophenol and 2,4-dichlorophenol were demoted to zero from 514 mg/L, 652 mg/L and that of 2,4,6-trichlorophenol and pentachlorophenol were reduced to 18 mg/L and 37 mg/L from 790 mg/L and 1066 mg/L, respectively (high-pressure liquid chromatography analysis). Chloride ion release profiles also showed a progressively increasing trend. A neat chemical oxygen demand removal to the extent of 63-79% was achieved in the case of spiked wastewater sample and to the extent of 77% for industrial wastewaters. A hypothesis reaction scheme was also suggested to comprehend the mechanism of degradation reactions.
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Affiliation(s)
- Swati Sharma
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India E-mail: ; ; Department of Chemical Engineering, Sarvajanik College of Engineering and Technology, Surat 395001, Gujarat, India
| | - Mausumi Mukhopadhyay
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India E-mail: ;
| | - Z V P Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India E-mail: ;
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Vyas AH, Jauhari S, Murthy ZVP. Separation of Pt(IV) from Industrial Wastewater Using Rice Husk Adsorbent and Its Derivatives. J DISPER SCI TECHNOL 2014. [DOI: 10.1080/01932691.2013.812939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Patel CM, Chakraborty M, Murthy ZVP. Preparation of fenofibrate nanoparticles by combined stirred media milling and ultrasonication method. Ultrason Sonochem 2014; 21:1100-1107. [PMID: 24365225 DOI: 10.1016/j.ultsonch.2013.12.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 11/27/2013] [Accepted: 12/04/2013] [Indexed: 06/03/2023]
Abstract
The production of fenofibrate nanoparticles combining stirred media milling and ultrasonication method was investigated in the current work. The fenofibrate drug sample was first wet milled in stirred media mill for different times and subsequently processed by ultrasonication. The effects of ultrasonication time, power on final product particle sizes were studied. The pre milling by stirred media milling was resulted into reduction of comminution resistance of material. Subsequent treatment by ultrasonication produced smaller particles than obtained by stirred media milling alone. The resulting nanoparticles were found to exhibit excellent stability as investigated by particle size, zeta potential, and multiple light scattering measurement techniques. Further, qualities of nanoparticles obtained by combined approach were characterized by TEM and XRD analysis.
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Affiliation(s)
- Chetankumar M Patel
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat 395 007, Gujarat, India
| | - Mousumi Chakraborty
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat 395 007, Gujarat, India
| | - Z V P Murthy
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat 395 007, Gujarat, India.
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Parmar KR, Basha S, Murthy ZVP. Application of graphene oxide as a hydrothermal catalyst support for synthesis of TiO2 whiskers. Chem Commun (Camb) 2014; 50:15010-3. [DOI: 10.1039/c4cc06411a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
How graphene oxide (GO) with its step edges and wrinkles (∼1–2 nm) acts as a catalyst in hydrothermal nucleation and growth is demonstrated.
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Affiliation(s)
- Kaushal R. Parmar
- Marine Biotechnology and Ecology Discipline
- CSIR – Central Salt & Marine Chemicals Research Institute
- Bhavnagar 364 002, India
- Department of Chemical Engineering
- S.V. National Institute of Technology Surat
| | - Shaik Basha
- Marine Biotechnology and Ecology Discipline
- CSIR – Central Salt & Marine Chemicals Research Institute
- Bhavnagar 364 002, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering
- S.V. National Institute of Technology Surat
- Surat – 395007, India
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Gupta S, Chakraborty M, Murthy ZVP. Removal of Mercury by Emulsion Liquid Membranes: Studies on Emulsion Stability and Scale Up. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2013.767205] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rajesh S, Murthy ZVP. In Situ Synthesis and Characterization of 2,2′-Methylenebis(6-tert-butyl-4-ethylphenol)-Incorporated Polymeric Membranes. Adv Polym Technol 2013. [DOI: 10.1002/adv.21392] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Smitha Rajesh
- Department of Chemical Engineering; Sardar Vallabhbhai National Institute of Technology; Surat 395007 Gujarat India
| | - Z. V. P. Murthy
- Department of Chemical Engineering; Sardar Vallabhbhai National Institute of Technology; Surat 395007 Gujarat India
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Mishra PS, Solanki JN, Murthy ZVP. TiO2nanoparticles synthesis for application in proton exchange membranes. Crystal Research and Technology 2013. [DOI: 10.1002/crat.201300179] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Preeti S. Mishra
- Department of Chemical Engineering; S.V. National Institute of Technology; Surat 395007 Gujarat India
| | - Jignasa N. Solanki
- Department of Chemical Engineering; S.V. National Institute of Technology; Surat 395007 Gujarat India
| | - Z. V. P. Murthy
- Department of Chemical Engineering; S.V. National Institute of Technology; Surat 395007 Gujarat India
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Murthy ZVP, Vijayaragavan K, Pant KK. Kinetic and Thermodynamic Studies of Ni(II) Adsorption onto Activated Carbon ofAbelmoschus manihotfrom Aqueous Solutions. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.731644] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Murthy ZVP, Parikh PA, Patel NB. Application of β-Zeolite, Zeolite Y, and Mordenite as Adsorbents to Remove Mercury from Aqueous Solutions. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.685839] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Murthy ZVP, Modi AD. Effect of Ionic Liquid in Sn-ZSM-5 Zeolite Membrane in the Separation of Butyl Acetate–Water Mixtures by Pervaporation. ACTA ACUST UNITED AC 2013. [DOI: 10.1080/15533174.2012.749902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Z. V. P. Murthy
- a Department of Chemical Engineering , Sardar Vallabhbhai National Institute of Technology Surat , Surat , Gujarat , India
| | - Ashishkumar D. Modi
- a Department of Chemical Engineering , Sardar Vallabhbhai National Institute of Technology Surat , Surat , Gujarat , India
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Vyas AH, Jauhari S, Murthy ZVP. Chemically Modified Rice Husk Adsorbents, Characterization and Removal of Palladium(II) From Aqueous Solutions. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.667719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chaudhari LB, Murthy ZVP. Preparation, Characterization, and Performance of Sulfated Chitosan/Polyacrylonitrile Composite Nanofiltration Membranes. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.662432] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sharma S, Mukhopadhyay M, Murthy ZVP. Treatment of Chlorophenols from Wastewaters by Advanced Oxidation Processes. Separation & Purification Reviews 2013. [DOI: 10.1080/15422119.2012.669804] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tolia JV, Chakraborty M, Murthy ZVP. Mechanochemical Synthesis and Characterization of Group II-VI Semiconductor Nanoparticles. Particulate Science and Technology 2012. [DOI: 10.1080/02726351.2011.605825] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Patel SR, Murthy ZVP. Lactose Recovery Processes from Whey: A Comparative Study Based on Sonocrystallization. Separation & Purification Reviews 2012. [DOI: 10.1080/15422119.2011.594142] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Tolia J, Chakraborty M, Murthy ZVP. Synthesis and characterization of semiconductor metal sulfide nanocrystals using microemulsion technique. Cryst Res Technol 2012. [DOI: 10.1002/crat.201200077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
In recent years, electrocoagulation has been successfully used for wastewater treatment and is efficient in heavy metal ions removal. In the present work, electrocoagulation has been used for the removal of Hg(II) from synthetic wastewaters containing up to 20 mg/L of mercury. The electrode materials used are stainless steel (SS) and aluminum (Al). The effects of operating parameters, viz., current density, time of electrocoagulation, distance between electrodes, initial pH of the solution, presence of electrolyte in the solution and temperature have been studied. It was observed that more than 99% Hg(II) removal can be achieved by keeping the distance between SS and Al electrodes from 2 to 6 cm and initial pH range from 3 to 7. The results show that the pseudo second-order kinetics fits the data well. Also, preliminary cost estimation was reported.
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Affiliation(s)
- Z V P Murthy
- Department of Chemical Engineering, S. V. National Institute of Technology, Surat 395 007, Gujarat, India.
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Gandhi PJ, Murthy ZVP, Pati RK. Optimization of process parameters by Taguchi robust design method for the development of nano-crystals of sirolimus using sonication based crystallization. Cryst Res Technol 2011. [DOI: 10.1002/crat.201100329] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Affiliation(s)
- Sachin U. Nandanwar
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat-395 007, Gujarat, India
| | - Mousumi Chakraborty
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat-395 007, Gujarat, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat-395 007, Gujarat, India
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Patel SR, Murthy ZVP. Effect of process parameters on crystal size and morphology of lactose in ultrasound-assisted crystallization. Cryst Res Technol 2011. [DOI: 10.1002/crat.201000694] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chaudhari LB, Murthy ZVP. Post-treatment of biologically treated wastewater of agrochemical industry by sulfated chitosan composite nanofiltration membrane. Water Sci Technol 2011; 64:796-802. [PMID: 22097063 DOI: 10.2166/wst.2011.596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The objective of this study is to treat the biologically treated wastewater using sulfated chitosan/ polyacrylonitrile (PAN) composite nanofiltration (NF) membrane to improve agrochemical industry wastewater quality for reuse. Although biological treatment is quite efficient, the wastewater does not meet the reuse criteria. Hence, further treatment to improve the water quality is investigated. Sulfated chitosan composite NF membranes, having a PAN ultrafiltration membrane as the substrate, are prepared by coating and cross-linking methods. The effects of membrane preparation conditions on the rejection and permeation performance of the membranes are studied. The new membranes are characterized by NMR and scanning electron micrograph. Wastewater from agrochemical industry contains high concentrations of organic matter, color, heavy metals and other toxic substances. The operating variables studied are applied pressure (3-15 atm) and feed flowrate (4-16 L/min). It is found that the observed rejection (R(o)) increases with increase in feed pressure at constant feed flowrate. The rejection of cations follows the sequence: R(o)(Zn2+) > R(o)(Ni2+) > R(o)(CU2+) > R(o)(Cd2+) for wastewater. It is observed that the order of solute rejection sequence is inversely proportional to the diffusion coefficients.
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Affiliation(s)
- Latesh B Chaudhari
- Department of Chemical Engineering, S. V. National Institute of Technology, Surat 395007, Gujarat, India
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Rajesh S, Parikh PA, Murthy ZVP. In Situ synthesis of inorganic filler-filled polyethylene using polyethersulfone-supported TiCl4 catalyst system. J Appl Polym Sci 2010. [DOI: 10.1002/app.32768] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chaudhari LB, Murthy ZVP. Separation of Cd and Ni from multicomponent aqueous solutions by nanofiltration and characterization of membrane using IT model. J Hazard Mater 2010; 180:309-315. [PMID: 20452729 DOI: 10.1016/j.jhazmat.2010.04.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 04/04/2010] [Accepted: 04/08/2010] [Indexed: 05/29/2023]
Abstract
Removal of heavy metals from wastewater is of critical importance due to their high toxicity and tendency to accumulate in living organisms. In the present work, performance of a nanofiltration (NF) membrane has been studied to separate cadmium and nickel ions from multicomponent aqueous solutions at different operating conditions. It is observed that the separation of cadmium and nickel ions increases with increase in applied pressure and decreases with increase in feed concentration at a constant feed flow rate. The maximum observed solutes rejection of cadmium and nickel ions are 80.57% and 85.27% for CdCl(2)-NiCl(2)-water system and 97.26% and 98.90% for CdSO(4)-NiSO(4)-water system, respectively, for an initial feed concentration of 0.005 g/L. This difference in rejection is due to the charge density of the anions. It is also observed that the order of solute rejection sequence is inversely proportional to the diffusion coefficient. The NF membrane is characterized by an irreversible thermodynamics (IT) based Spiegler-Kedem model, coupled with film theory. Boundary-layer thickness and membrane transport parameters are estimated using Levenberg-Marquadt method. The estimated parameters are used to predict the membrane performance and found that the predicted values are in satisfactory agreement with the experimental results.
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Affiliation(s)
- Latesh B Chaudhari
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat 395007, Gujarat, India
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Chaudhari LB, Murthy ZVP. Treatment of landfill leachates by nanofiltration. J Environ Manage 2010; 91:1209-1217. [PMID: 20149518 DOI: 10.1016/j.jenvman.2010.01.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 12/28/2009] [Accepted: 01/10/2010] [Indexed: 05/28/2023]
Abstract
Landfill leachate contains high concentrations of organic matter, color, heavy metals and toxic substances. This study presents the feasibility of a commercial nanofiltration membrane (NF-300) in the removal of pollutants from a landfill leachate generated from the Treatment Stabilization and Disposal Facility in Gujarat state of India. Two different leachate samples (Leachates A and B) were collected from the downstream side of closed landfill cells A and B. The average quality of the leachate was 67 719 mg/L COD, 217 mg/L ammonical nitrogen, 22 418 mg/L BOD, 3847 mg/L chlorides and 909 mg/L sulphate. The operating variables studied were applied pressure (4-20 atm), feed flowrate (5-15L/min) and pH (2, 4, 5.5 and 6.7). It was observed that the solute rejection (R(O)) increased with increase in feed pressure and decreased with increase in feed concentration at constant feed flowrate. In the present study, the rejection of cations followed the sequence: R(O) (Cr(3+))>R(O) (Ni(2+))>R(O) (Zn(2+))>R(O) (Cu(2+))>R(O) (Cd(2+)) for leachates A and B. The order of solute rejection sequence is inversely proportional to the diffusion coefficients. The rejection of sulphate ions by the NF-300 membrane was 83 and 85%, while the rejection of chlorides was 62 and 65% for leachates A and B, respectively. The NF-300 membrane was characterized by using the combined-film theory-Spiegler-Kedem (CFSK) model based on irreversible thermodynamics and the ion transport model based on the extended Nernst-Planck equation. The membrane transport parameters were estimated using the Levenberg-Marquadt method. The estimated parameters were used to predict the membrane performance and the predicted values are in good agreement with the experimental results.
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Affiliation(s)
- Latesh B Chaudhari
- Department of Chemical Engineering, S.V. National Institute of Technology, Surat 395007, Gujarat, India
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Patel SR, Murthy ZVP. Optimization of process parameters by Taguchi method in the recovery of lactose from whey using sonocrystallization. Cryst Res Technol 2010. [DOI: 10.1002/crat.201000139] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Affiliation(s)
- Swati Sharma
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology,Surat 395007, Gujarat, India, and Department of Chemical Engineering, Sarvajanik College of Engineering and Technology, Surat 395001, Gujarat, India
| | - Mausumi Mukhopadhyay
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology,Surat 395007, Gujarat, India, and Department of Chemical Engineering, Sarvajanik College of Engineering and Technology, Surat 395001, Gujarat, India
| | - Z. V. P. Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology,Surat 395007, Gujarat, India, and Department of Chemical Engineering, Sarvajanik College of Engineering and Technology, Surat 395001, Gujarat, India
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Kennedy Oubagaranadin JU, Murthy ZVP. Characterization and use of acid-activated montmorillonite-illite type of clay for lead(II) removal. AIChE J 2010. [DOI: 10.1002/aic.12164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Affiliation(s)
- John U. Kennedy Oubagaranadin
- Department of Ceramic and Cement Technology, PDA College of Engineering, Gulbarga 585102, Karnataka, India, and Department of Chemical Engineering, S.V. National Institute of Technology, Surat 395007, Gujarat, India
| | - Z. V. P. Murthy
- Department of Ceramic and Cement Technology, PDA College of Engineering, Gulbarga 585102, Karnataka, India, and Department of Chemical Engineering, S.V. National Institute of Technology, Surat 395007, Gujarat, India
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Murthy ZVP, Chaudhari LB. Application of nanofiltration for the rejection of nickel ions from aqueous solutions and estimation of membrane transport parameters. J Hazard Mater 2008; 160:70-77. [PMID: 18400379 DOI: 10.1016/j.jhazmat.2008.02.085] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2007] [Revised: 09/23/2007] [Accepted: 02/26/2008] [Indexed: 05/26/2023]
Abstract
The present work deals with the application of a thin-film composite polyamide nanofiltration membrane for the rejection of nickel ions from aqueous wastewater. The operating variables studied are feed concentration (5-250ppm), applied pressure (4-20atm), feed flowrate (5-15L/min) and pH (2-8). It is observed that the observed rejection of nickel ions increases with increase in feed pressure and decreases with increase in feed concentration at constant feed flowrate. The maximum observed rejection of the metal is found to be 98% and 92% for an initial feed concentration of 5 and 250ppm, respectively. The effect of pH on the rejection of nickel ions and permeate flux are studied, and found that the variation in pH is having more effect on the latter than the former. The experimental data are analyzed using membrane transport models; combined-film theory-solution-diffusion (CFSD), combined-film theory-Spiegler-Kedem (CFSK) and combined-film theory-finely porous (CFFP) models; to estimate membrane transport parameters and mass transfer coefficient, k. Also, enrichment factor, concentration polarization modulus and Peclet number are found from various parameters. From CFFP model the effective membrane thickness and active skin layer thickness are found.
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Affiliation(s)
- Z V P Murthy
- Department of Chemical Engineering, S.V. National Institute of Technology, Gujarat, India.
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