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Heterolayered TiO2@ layered double hydroxide-MoS2 nanostructure for simultaneous adsorption-photocatalysis of co-existing water contaminants(Applied Surface Science)
(Deepak Panchal, Abhishek Sharma, Prasenjit Mondal, Om Prakash, Sukdeb Pal,Vol(553),Pages(149577),,,Year : 2021)
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The highly ordered heterolayered-nanostructure TiO2@Layered double hydroxide/Molybdenum disulfide (TiO2@LDH/MoS2; T@L/M) is formed by electrostatically-driven self-assembly of positively charged TiO2-dispersed-LDH layers (T@L) and negatively charged MoS2 nanosheets. TiO2 are incorporated in-situ across the LDH during synthesis yielding exfoliated TiO2-dispersed-LDH layers (T@L). Prior to MoS2 assembly, its interlayer spacing is enlarged and defects are created in basal-plane exposing sulfur-rich sites. Visible-light-active MoS2 and TiO2 synthesized heterostructure extending the T@L/M photoactivity in visible spectrum (2.92 eV) for enhanced degradation capacity
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Adsorption of five emerging contaminants on activated carbon from aqueous medium: kinetic characteristics and computational modeling for plausible mechanism(Environmental Science and Pollution Research)
(Archana Rao, Anupama Kumar, Rita Dhodapkar, Sukdeb Pal,Vol(28),Issue(17),Pages(21347-21358),,,Year : 2021)
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Pharmaceuticals and personal care products (PPCPs) do not have standard regulations for discharge in the environment and are categorized as contaminants of emerging concern as they pose potential threats to ecology as well as humans even at low concentrations. Conventional treatment processes generally employed in the wastewater treatment plants are not adequately engineered for effective removal of PPCPs. Identifying cost-effective tertiary treatment is therefore, important for complete removal of PPCPs from wastewater prior to discharge or reuse. Present study demonstrates adsorption using granular-activated carbon (GAC) as a possible tertiary treatment for simultaneous removal of five PPCPs from aqueous media. Adsorbent was characterized in terms of morphology, surface area, surface charge distribution, and presence of functional groups.
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Profiling of emerging contaminants and antibiotic resistance in sewage treatment plants: an Indian perspective(Journal of Hazardous Materials)
(Priyam Saxena, Isha Hiwrale, Sanchita Das, Varun Shukla, Lakshay Tyagi, Sukdeb Pal, Nishant Dafale, Rita Dhodapkar,Vol(408),Pages(124877),,,Year : 2021)
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In India, sewage (partially-treated/ untreated) is randomly used for irrigation because of easy availability and presence of residual organics and nutrients. However, data on the occurrence of contaminants of emerging concerns (CECs) such as pharmaceuticals and personal care products (PPCPs) and antibiotic resistant bacteria (ARB) and antibiotic resistant genes (ARGs) in sewage is scarce in Indian perspective. Herein, for the first time, we present a quantitative contamination profiling of selected PPCPs and antibiotic resistance in untreated and biologically-treated sewage from three different sewage treatment plants, located in northern and central part of India. Profiling of PPCPs were done using LC-ESI-MS/MS whereas antibiotic resistance was analyzed using gradient PCR and qPCR techniques.
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SARS-CoV-2: fate in water environments and sewage surveillance as an early warning system(Water Science and Technology)
(Deepak Panchal, Purusottam Tripathy, Om Prakash, Abhishek Sharma, Sukdeb Pal,,,,Year : 2021)
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Coronavirus disease has emerged as one of the greatest threats to human well-being. Currently, the whole world is fighting against this pandemic that is transmitted either through exposure to virus laden respiratory or water droplets or by touching the virus contaminated surfaces. The viral load in feces of an infected patient varies according to the severity of the disease. Subsequent detection of viral genome (SARS-CoV-2) in human feces and sewage systems is an emerging concern for public health. This also dictates to reinforce the existing sewage/wastewater treatment facilities. Rapid monitoring is the key to prevent and control the current mass transmission. Wastewater-Based Epidemiology (WBE) is a potential epidemiology tool that can act as a complementary approach for current infectious disease surveillance systems and an early warning system for disease outbreaks
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Corrigendum to (Journal of Chemistry)
(Sukdeb Pal M. Bernard Kameni Ngounou, Girivyankatesh Hippargi, Ndi K. Sylvere, Kofa G. Patrice, Kayem G. Joseph,Vol(2021),Pages(1),,,Year : 2021)
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Professor Pal contributed to the conception and design of the study in addition to collecting, analyzing, and interpreting the data and manuscript preparation. e experimental work was carried out in CSIR-National Environmental Engineering Research Institute (CSIR-NEERI) under his supervision. Professor Pal has been added as the corresponding author.
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SARS-CoV-2: sewage surveillance as an early warning system and challenges in developing countries(Environmental Science and Pollution Research)
(Sukdeb Pal Deepak Panchal, Om Prakash, Prakash Bobde,,,,Year : 2021)
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Transmission of novel coronavirus (SARS-CoV-2) in humans happens either through airway exposure to respiratory droplets from an infected patient or by touching the virus contaminated surface or objects (fomites). Presence of SARS-CoV-2 in human feces and its passage to sewage system is an emerging concern for public health. Pieces of evidence of the occurrence of viral RNA in feces and municipal wastewater (sewage) systems have not only warned reinforcing the treatment facilities but also suggest that these systems can be monitored to get epidemiological data for checking trend of COVID-19 infection in the community. This review summarizes the occurrence and persistence of novel coronavirus in sewage with an emphasis on the possible water environment contamination
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Assessment of Environmental Water Security of an Asian Deltaic Megacity and Its Peri-Urban Wetland Areas(Sustainability)
(Subham Mukherjee, Pradip K. Sikdar, Sukdeb Pal, Brigitta. Sch?tt,Vol(13),Issue(5),Pages(2772),,,Year : 2021)
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Achieving urban water security requires sustaining the trade-offs between the exploitation of water/environmental resources and ecosystem services. This achievement not only reduces the pollution and contamination in the environment, level of water stress, but also secures good ambient water quality and future for people?s well-being and livelihoods. Changes in land use and land cover and growth of impervious structures can immediately generate severe ecological and social issues and increase the level of natural or manmade risks, affecting the condition of ecosystem services within and in the vicinity of an urban region. As a result of these transformations and further exploitation, due to the growing anthropogenic pressure, surface water and groundwater quality can be deteriorated compared to ambient water quality standards (for both chemical and biological pollutants). Based on land use and land cover (LULC) data retrieved from remote sensing interpretation, we computed the changes of the ecosystem service values (ESV) associated with the LULC dynamics, water quality and, finally, urban water security during the pre-and post-monsoon periods of 2009, 2014 and 2019 in Kolkata, an Asian deltaic megacity, and its peri-urban wetlands named East Kolkata Wetlands (EKW). The area under wetlands reduced comprehensively in 2009?2019 due to the conversion of wetlands into various other classes such as urban settlement, etc. The quality of surface water bodies (such as rivers, lakes, canals and inland wetlands) deteriorated.
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Environmental Disaster Management and Risk Reduction(Environmental Management: Issues and Concerns in Developing Countries)
(Sukdeb Pal Subham Mukherjee, Surajit Kar,,,,Year : 2021)
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The environment can be well-defined as all forms that surround both living elements (such as humans or animals, fishes and birds) as well as non-living elements, itself classified as both moving (such as air and water) and non-moving (such as mountains and forests). Human activities do interact with the bio-physical environment in a multifaceted manner connecting different geographical levels. The existence of all living forms on this planet gradually evolved to build a healthy and well-balanced environment throughout the space and time. The new economic demand should operate in a way that shields the biophysical environment to maintain the balanced and sustainable growth both at the present and in the future.
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Effect of Grewia spp. biopolymer on floc properties of coagulated laterite suspension(Desalination and Water Treatment)
(Kameni Ngounou M Bernarda, Prakash V Bobdea, Ndi K Sylvereb, Kofa G Patriceb, Kayem G Josephb, Sukdeb Pala,Vol(185),Pages(132-144),,,Year : 2020)
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No information is available
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Biodegradable Polymeric Nanocarrier-Based Immunotherapy in Hepatitis Vaccination(Cutting-Edge Enabling Technologies for Regenerative Medicine)
(Seo Jin Hong, Min Hye Ahn, Yong Woo Lee,Vol(1078),Pages(303),,,Year : 2018)
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Various commercial vaccines are used for immunization against hepatitis B. However, these immunotherapeutic vaccines require invasive administration, which can induce side effects, and require multiple shots to elicit an immune response, limiting their efficacy. Compared to traditional hepatitis B vaccines, polymer nanoparticles have more advantageous inherent properties as vaccine delivery carriers, providing increased stability of encapsulated antigen, the possibility of singleshot immunotherapy, and the capability of mucosal administration, which allows various
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Shape-dependent skin penetration of silver nanoparticles: does it really matter?(Scientific Reports)
(Yu Kyung Tak, Sukdeb Pal, Pravin K Naoghare, Sabarinathan Rangasamy, Joon Myong Song,Vol(5),Issue(1),Pages(1-11),,,Year : 2015)
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Advancements in nano-structured materials have facilitated several applications of nanoparticles (NPs). Skin penetration of NPs is a crucial factor for designing suitable topical antibacterial agents with low systemic toxicity. Available reports focus on size-dependent skin penetration of NPs, mainly through follicular pathways. Herein, for the first time, we demonstrate a proof-of-concept study that entails variations in skin permeability and diffusion coefficients, penetration rates and depth-of-penetration of differently shaped silver NPs (AgNPs) via intercellular pathways using both in vitro and in vivo models. The antimicrobial activity of AgNPs is known.
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A multifunctional composite of an antibacterial higher-valent silver metallopharmaceutical and a potent wound healing polypeptide: a combined killing and healing approach to wound care(New Journal of Chemistry)
(Sukdeb Pal, Yu Kyung Tak, Eunyoung Han, Sabarinathan Rangasamy, Joon Myong Song,Vol(38),Issue(8),Pages(3889-3898),,,Year : 2014)
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The present study relates to a combined killing and healing approach for the treatment of infected wounds. Herein we report a multifunctional, including antimicrobial and wound healing, composite containing a conjugate of a bi-valent silver polydiguanide that demonstrated high antibacterial activity in vitro and a potent wound healing polypeptide, histatin-1, for the treatment of infected wounds. The synthesis of silver(II) chlorhexidine [Ag(II)CHX] was accomplished by the oxidation of Ag(I), followed by the complexation of the oxidized metal with chlorhexidine (CHX), whereas the metal complex conjugate of the solid phase-synthesized histatin polypeptide (Hst-1), Hst-1-[Ag(II)CHX], was realized by mixing the starting materials in aqueous solution.
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Feasibility of bioengineered two-stages sequential batch reactor and filtration(Bioresource Technology)
(Pravin Manekar, Rima Biswas, Chaitali Urewar, Sukdeb Pal, Tapas Nandy,Vol(148),Pages(334-342),,,Year : 2013)
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In the present study, the feasibility of a bioengineered two-stages sequential batch reactor (BTSSBR) followed by filtration?adsorption process was investigated to treat the agrochemical effluent by overcoming factor affecting process stability such as microbial imbalance and substrate sensitivity. An air stripper stripped 90% of toxic ammonia, and combined with other streams for bio-oxidation and filtration?adsorption. The BTSSBR system achieved bio-oxidation at 6 days hydraulic retention time by fending off microbial imbalance and substrate sensitivity. The maximum reduction in COD and BOD by heterotrophic bacteria in the first reactor was 87% and 90%, respectively.
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Quantitative classification of DNA damages induced by submicromolar cadmium using oligonucleotide chip coupled with lesion-specific endonuclease digestion(Environmental science & technology)
(Sukdeb Pal, Ji Yeon Kim, Sun Hee Park, Heung Bin Lim, Kyeong-Hee Lee, Joon Myong Song,Vol(45),Issue(10),Pages(4460-4467),,,Year : 2011)
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Implementation of proper analytical tool for systematic investigation and quantitative determination of different classes of cadmium ion-induced DNA damages, especially at low metal ion concentrations, is still lacking. Using lesion-specific enzymes that cleave DNA at specific classes of damage and a fluorometric approach developed for quantifying fluorophore-labeled oligonucleotides bound to chip surfaces, we determined the frequencies of different lesions (strand breaks, oxidized purines, oxidized pyrimidines, or abasic sites) induced by submicromolar Cd2+. Cd2+-treated oligonucleotide chips were digested with various endonucleases (Fpg protein, endonuclease III, endouclease IV), producing a de novo single strand break (SSB) at their substrate modifications.
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High-content screening of drug-induced cardiotoxicity using quantitative single cell imaging cytometry on microfluidic device(Lab on a Chip
)
(Min Jung Kim, Su Chul Lee, Sukdeb Pal, Eunyoung Han, Joon Myong Song,Vol(11),Issue(1),Pagess(104-114),,,Year : 2011)
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Drug-induced cardiotoxicity or cytotoxicity followed by cell death in cardiac muscle is one of the major concerns in drug development. Herein, we report a high-content quantitative multicolor single cell imaging tool for automatic screening of drug-induced cardiotoxicity in an intact cell. A tunable multicolor imaging system coupled with a miniaturized sample platform was destined to elucidate drug-induced cardiotoxicity via simultaneous quantitative monitoring of intracellular sodium ion concentration, potassium ion channel permeability and apoptosis/necrosis in H9c2(2?1) cell line. Cells were treated with cisapride (a human ether-?-go-go-related gene (hERG) channel blocker), digoxin (Na+/K+-pump blocker), camptothecin (anticancer agent) and a newly synthesized anti-cancer drug candidate (SH-03).
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Pulsed photostimulated-and thermo-luminescence investigations of ? ray-irradiated herbs(Food chemistry
)
(Sukdeb Pal, Byeong Keun Kim, Won Young Kim, Min Jung Kim, Hyeon A Ki, Woo Suk Kang, In Ho Kang, Shin Jung Kang, Joon Myong Song,Vol(122),Issue(4),Pages(1290-1297),,,Year : 2010)
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In this study, physical detection methods like pulsed photo-stimulated luminescence (PPSL) and thermoluminescence (TL) were investigated to indentify ?-ray irradiation treatment of some medicinal herbs. Dried herbal samples consisting of root, rhizome, cortex, fruit, seed, flower, spike, ramulus, folium and whole plant of nineteen different herbs were irradiated using a 60Co irradiator at 0?50 kGy. Fifteen non-irradiated control samples had photon counts (PCs) less than the lower threshold value (700 counts/60 s). The photon counts of four non-irradiated samples (roots of osterici, angelica gigas, liriope, and whole plant of taraxaci herba) were between the lower and upper threshold values (700?5000 counts/60 s).
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Metallopharmaceuticals based on silver (I) and silver (II) polydiguanide complexes: activity against burn wound pathogens(Journal of antimicrobial chemotherapy
)
(Sukdeb Pal, Eun Jeong Yoon, Sun Hee Park, Eung Chil Choi, Joon Myong Song,Vol(65),Issue(10),Pages(2134-2140),,,Year : 2010)
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The in vitro pharmacodynamics of silver(I) and silver(II) complexes of a polydiguanide ligand, chlorhexidine, were assayed to examine the value of the bactericidal endpoint as an alternative means of evaluating their antibacterial activities against burn wound pathogens.
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Development of radiation indicators to distinguish between irradiated and non-irradiated herbal medicines using HPLC and GC-MS(Analytical and bioanalytical chemistry)
(Min Jung Kim, Hyeon A Ki, Won Young Kim, Sukdeb Pal, Byeong Keun Kim, Woo Suk Kang, Joon Myong Song,Vol(398),Issue(2),Pages(943-953),,,Year : 2010)
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The effects of high dose ?-irradiation on six herbal medicines were investigated using gas chromatography?mass spectrometry (GC/MS) and high-performance liquid chromatography (HPLC). Herbal medicines were irradiated at 0?50 kGy with 60Co irradiator. HPLC was used to quantify changes of major components including glycyrrhizin, cinnamic acid, poncirin, hesperidin, berberine, and amygdalin in licorice, cinnamon bark, poncirin immature fruit, citrus unshiu peel, coptis rhizome, and apricot kernel. No significant differences were found between gamma-irradiated and non-irradiated samples with regard to the amounts of glycyrrhizin, berberine, and amygdalin. However, the contents of cinnamic acid, poncirin, and hesperidin were increased after irradiation. Volatile compounds were analyzed by GC/MS. The relative proportion of ketone in licorice was diminished after irradiation
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Antibacterial Metallopharmaceuticals Based on Nanocrystalline Trivalent Silver Polydiguanide
(PAL Sukdeb, Joon Myong SONG,Pages(223-223),,,Year : 2010)
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Synthesis and characterization of nanocrystalline trivalent silver polydiguanide complex was described. The antibacterial activity of the synthesized nanoparticles was evaluated against burn wound pathogens. Synthesis of essentially monodispersed nanoparticles of higher valentmetal complex was accomplished by oxidation of the monovalent silver, followed by stabilization of the oxidized higher-valent metal through complexation with chlorhexidine, a polydiguanide ligand in a reverse microemulsion at room temperature. Their antibacterial potencies wereassessed invitroby determining the MICs and MBCs against four Gram-positive and four Gram-negative bacteria using agar dilution and microdilution methods.
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Synthesis of highly antibacterial nanocrystalline trivalent silver polydiguanide(Journal of the American Chemical Society)
(Sukdeb Pal, Eun Jeong Yoon, Yu Kyung Tak, Eung Chil Choi, Joon Myong Song,Vol(131),Issue(44),Pages(16147-16155),,,Year : 2009)
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Highly monodispersed nanoparticles of a trivalent silver polydiguanide complex are synthesized by oxidation of the monovalent silver, followed by stabilization of the oxidized higher-valent metal through complexation with a polydiguanide ligand in a reverse microemulsion at room temperature. The synthesized nanoparticles have excellent photostability and displayed superior antibacterial activity toward Gram-positive and Gram-negative prokaryotes of clinical interest in vitro compared to silver sulfadiazine.
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