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Sustainability of metal recovery from E-waste metal recovery sustainability

Frontiers of Environmental Science & Engineering 2018年第6期12卷 15-26页

作者： Biswajit Debnath Ranjana Chowdhury sadhan kumar ghosh Department of Chemical Engineering Jadavpur UniversityKolkata 700032India Department of Mechanical Engineering Jadavpur UniversityKolkata 700032India

The issue of E-waste disposal is concerning all the stakeholders, from policymakers to the end users which have accelerated the research and development on environmentally sound disposal of E-waste. The recovery of metals (gold, tantalum, copper, iron etc.) from E-waste has become an important focus. The mechanical recycling, thermo-chemical processes like pyrolysis, pyro-, hydro- and biometallurgical processes can play important roles in the Metal Recovery from E-waste (MREW) technology. For the industrial application of the MREW technology, it is important to analyze the sustainability. In this paper, two case studies have been presented on E-waste recycling industries in India and China. Based on the literature data, an attempt has been made to assess qualitatively the overall sustainability of MREW technology considering the three pillars, i.e., environmental, economic and social. Two conceptual frameworks with (Option-2) and without (Option-1) pyrolysis for integrated MREWunits have been developed and the generalized energy and environmental impact analysis has been made using the principles of LCA. The impacts of two options have been compared. Option 2 has been found to be more efficient and sustainable. It has been realized that climate change, fossil fuel depletion, water depletion, eutrophication, acidification, fresh and marine water ecotoxicity are possible impact categories. The recommendations based on the generalized assessment are in good agreement with the findings of previous researchers on individual steps of MREWunit. The findings of this paper are expected to be beneficial to researchers and stakeholders for research directions and decision making on MREW.

关键词： E-waste Metal recovery Metal Recovery from E-waste (MREW) Sustainability

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Finite-time tracking control of heterogeneous multi-AUV systems with partial measurements and intermittent communication

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Science China(Information Sciences) 2024年第5期67卷 165-182页

作者： Bo CHEN Jiangping HU Bijoy kumar ghosh School of Automation Engineering University of Electronic Science and Technology of China Key Laboratory of Intelligent Analysis and Decision on Complex Systems Chongqing University of Posts and Telecommunications Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China Department of Mathematics and Statistics Texas Tech University

The development of a distributed trajectory-tracking control strategy that is independent of velocity measurements is critical to achieving finite-time tracking control of autonomous underwater vehicle(AUV) systems. In this study, a group of heterogeneous AUV systems with intermittent communication links is considered and a finite-time trajectory-tracking control strategy is developed. The strategy includes two observers and one controller proposed for each follower-AUV. The first observer, a hybrid finite-time observer,estimates the state of the leader, whereas the second observer, which relies only on the position measurement,is proposed to estimate the states of the follower-AUV itself. In addition, a distributed trajectory-tracking controller is designed using the states estimated by the intermittent communication network even without velocity measurements. A homogeneous technique is utilized to prove that all followers can track the leader in a finite time. Finally, the effectiveness of the developed finite-time tracking control strategy is illustrated by numerical simulations.

关键词： distributed observer finite-time tracking homogeneous technique intermittent communication multiple heterogeneous AUVs

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Appraisal of pollution and health risks associated with coal mine contaminated soil using multimodal statistical and Fuzzy-TOPSIS approaches

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 101-115页

作者： Sumit kumar Sonali Banerjee Saibal ghosh Santanu Majumder Jajati Mandal Pankaj kumar Roy Pradip Bhattacharyya Agricultural and Ecological Research Unit Indian Statistical InstituteGiridih815301India Department of Life and Environmental Sciences Bournemouth University(Talbot Campus)Fern BarrowPooleBH12 5BBUK School of Sciences Engineering & EnvironmentUniversity of SalfordSalfordM5 4QJUK School of Water Resource Engineering Jadavpur UniversityKolkata700032India School of Environmental Studies Jadavpur UniversityKolkata700032India

The present study assesses the concentration,probabilistic risk,source classification,and dietary risk arising from heavy metal(HMs)pollution in agricultural soils affected by coal mining in eastern part of *** of soil and rice plant indicated significantly elevated levels of HMs beyond the permissible limit in the contaminated zones(zone 1:PbSoil:108.24±72.97,CuSoil:57.26±23.91,CdSoil:8.44±2.76,CrSoil:180.05±46.90,NiSoil:70.79±25.06 mg/kg;PbGrain:0.96±0.8,CuGrain:8.6±5.1,CdGrain:0.65±0.42,CrGrain:4.78±1.89,NiGrain:11.74±4.38 mg/*** 2:PbSoil:139.56±69.46,CuSoil:69.89±19.86,CdSoil:8.95±2.57,CrSoil:245.46±70.66,NiSoil:95.46±22.89 mg/kg;PbGrain:1.27±0.84,CuGrain:7.9±4.57,CdGrain:0.76±0.43,CrGrain:8.6±1.58,NiGrain:11.50±2.46 mg/kg)compared to the uncontaminated zone(zone 3).Carcinogenic and non-carcinogenic health risks were computed based on the HMs concentration in the soil and rice grain,with Pb,Cr,and Ni identified as posing a high risk to human *** Carlo simulation,the solubility-free ion activity model(FIAM),and severity adjusted margin of exposure(SAMOE)were employed to predict health *** hazard quotient(HQ)values for Ni,Cr,Cd,and Pb were>1,indicating a significant non-carcinogenic ***(risk thermometer)results for contaminated zones ranged from low to moderate risk(CrSAMOE:0.05,and NiSAMOE:0.03).Fuzzy-TOPSIS and variable importance plots(from random forest)showed that Ni and Cr were mostly responsible for the toxicity in the rice plant,respectively.A self-organizing map for source classification revealed common origin for the studied HMs with zone 2 exhibiting the highest *** positive matrix factorization model for the source apportionment identified coal mining and transportation as the predominant sources of *** distribution analysis indicated higher contamination near mining sites as compared to distant sampling ***,this study will aid environmental scientists and policymakers controllin

关键词： Coal mine Free ion activity model Monto Carlo Simulation Pollution and Health risk Fuzzy-TOPSIS

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Molecular mechanism of nanomaterials induced liver injury:A review

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World Journal of Hepatology 2024年第4期16卷 566-600页

作者： Sanjib kumar Das Koushik Sen Biswatosh ghosh Nabanita ghosh Krishnendu Sinha Parames C Sil Department of Zoology Jhargram Raj CollegeJhargram 721507India Department of Zoology Bidhannagar CollegeKolkata 700064India Department of Zoology Maulana Azad CollegeKolkata 700013India Department of Molecular Medicine Bose InstituteCalcutta 700054India

The unique physicochemical properties inherent to nanoscale materials have unveiled numerous potential applications,spanning beyond the pharmaceutical and medical sectors into various consumer industries like food and ***,humans encounter nanomaterials through diverse exposure routes,giving rise to potential health *** among these materials are silica and specific metallic nanoparticles,extensively utilized in consumer products,which have garnered substantial attention due to their propensity to accumulate and induce adverse effects in the *** review paper aims to provide an exhaustive examination of the molecular mechanisms underpinning nanomaterial-induced hepatotoxicity,drawing insights from both in vitro and in vivo ***,the most frequently observed manifestations of toxicity following the exposure of cells or animal models to various nanomaterials involve the initiation of oxidative stress and ***,we delve into the existing in vitro models employed for evaluating the hepatotoxic effects of nanomaterials,emphasizing the persistent endeavors to advance and bolster the reliability of these models for nanotoxicology research.

关键词： Nanoparticles Hepatotoxicity Oxidative stress Inflammation Autophagy

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Dual-wavelength all-fiber Q-switched fiber laser using bismuth-doped fiber as saturable absorber

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Optoelectronics Letters 2024年第3期20卷 147-151页

作者： Aruna ghosh Abdulkadir Mukhtar Diblawe Uttam kumar Samanta Moh Yasin Sulaiman Wadi Harun Mukul Chandra Paul Fiber Optics and Photonics Division CSIR-Central Glass and Ceramic Research InstituteKolkata 700032India Physics Department Jadavpur UniversityKolkata 700032India Photonics Engineering Laboratory Department of Electrical EngineeringUniversity of MalayaKuala Lumpur 50603Malaysia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

A passively Q-switched all-fiber laser is demonstrated using a 10-cm-long bismuth-doped fiber(BDF) as a saturable absorber(SA). The dual-wavelength operation was obtained due to the nonlinear effect inside the fabricated BDF, which has a high germanium content. Stable Q-switched pulses were obtained at the dual synchronous wavelengths of 1 530.1 nm and 1 531.1 nm. When the pump power is tuned from 105.3 mW to 191.0 mW, the repetition rate can be varied from 82.6 kMz to 117.6 kHz. The maximum pulse energy and average output power were 83.4 nJ and 9.8 mW, respectively while the minimum pulse width was 8.5 μs at the maximum pump power of 191.0 mW. Our results indicate that BDF could be a promising alternative optical modulator for pulsed fiber laser application.

关键词： fiber switched pump

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Emergence of taurine as a therapeutic agent for neurological disorders

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Neural Regeneration Research 2024年第1期19卷 62-68页

作者： Ashok Jangra Priyanka Gola Jiten Singh Pooja Gond Swarnabha ghosh Mahesh Rachamalla Abhijit Dey Danish Iqbal Mehnaz Kamal Punya Sachdeva Saurabh kumar Jha Shreesh Ojha Dinesh kumar Niraj kumar Jha Hitesh Chopra Shing Cheng Tan Department of Pharmaceutical Sciences Central University of HaryanaMahendergarhHaryanaIndia Department of Biology University of SaskatchewanSaskatoonSKCanada Department of Life Sciences Presidency UniversityKolkataWest BengalIndia Department of Health Information Management College of Applied Medical SciencesBuraydah Private CollegesBuraydahSaudi Arabia Department of Pharmaceutical Chemistry College of PharmacyPrince Sattam Bin Abdulaziz UniversityAl-KharjSaudi Arabia GloNeuro Vishwakarma RoadNoidaIndia Department of Biotechnology School of Engineering&Technology(SET)Sharda UniversityGreater NoidaUttar PradeshIndia Department of Pharmacology and Therapeutics College of Medicine and Health SciencesUnited Arab Emirates UniversityAl AinUnited Arab Emirates School of Bioengineering&Biosciences Lovely Professional UniversityPhagwaraIndia Department of Biotechnology School of Applied&Life Sciences(SALS)Uttaranchal UniversityDehradunIndia Chitkara College of Pharmacy Chitkara UniversityPunjabIndia UKM Medical Molecular Biology Institute Universiti Kebangsaan MalaysiaKuala LumpurMalaysia

Taurine is a sulfur-containing,semi-essential amino acid that occurs naturally in the *** alternates between inflammation and oxidative stress-mediated injury in various disease *** part of its limiting functions,taurine also modulates endoplasmic reticulum stress,Ca^(2+)homeostasis,and neuronal activity at the molecular *** effectively protects against a number of neurological disorders,including stro ke,epilepsy,cerebral ischemia,memory dysfunction,and spinal cord *** various therapies are available,effective management of these disorders remains a global *** 30 million people are affected *** design of taurine fo rmation co uld lead to potential drugs/supplements for the health maintenance and treatment of central nervous system *** general neuroprotective effects of taurine and the various possible underlying mechanisms are discussed in this *** article is a good resource for understanding the general effects of taurine on various *** the strong evidence for the neuropharmacological efficacy of taurine in various experimental paradigms,it is concluded that this molecule should be considered and further investigated as a potential candidate for neurotherapeutics,with emphasis on mechanism and clinical studies to determine efficacy.

关键词： antioxidant epilepsy γ-amino butyric acid neurodegenerative disorders neuroprotection oxidative stress spinal cord injury taurine

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Ultra-minimally invasive endoscopic techniques and colorectal diseases:Current status and its future

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Artificial Intelligence in Gastrointestinal Endoscopy 2024年第2期5卷 15-30页

作者： Nalini Kanta ghosh Ashok kumar Department of Surgical Gastroenterology Sanjay Gandhi Post Graduate Institute of Medical SciencesLucknow 226014Uttar PradeshIndia

Colorectal diseases are increasing due to altered lifestyle,genetic,and environmental *** plays an important role in *** in colonoscope(ultrathin scope,magnetic scope,capsule)and technological gadgets(Balloon assisted scope,third eye retroscope,NaviAid G-EYE,dye-based chromoendoscopy,virtual chromoendoscopy,narrow band imaging,i-SCAN,etc.)have made colonoscopy more comfortable and *** in-vivo microscopy can be performed using confocal laser endomicroscopy,optical coherence tomography,spectroscopy,*** developments in diagnostic colonoscopy,therapeutic colonoscopy has improved to manage lower gastrointestinal tract bleeding,obstruction,perforations,resection polyps,and early colorectal *** introduction of combined endo-laparoscopic surgery and robotic endoscopic surgery has made these interventions *** role of artificial intelligence in the diagnosis and management of colorectal diseases is also increasing day by ***,this article is to review cutting-edge developments in endoscopic principles for the management of colorectal diseases.

关键词： Colorectal disorders Ultra-minimally invasive scopes Advanced gadgets Endoscopic intervention Combined endo-laparoscopic surgery

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Performance validation of High Mountain Asia 8-meter Digital Elevation Model using ICESat-2 geolocated photons

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Journal of Mountain Science 2024年第8期21卷 2562-2578页

作者： Giribabu DANDABATHULA Subham ROY Omkar Shashikant GHATAGE Vaibhav Balaso KOLASE Shwetambari SATPUTE Koushik ghosh Sahibnoor KAUR Satyanarayana PONDARI Apurba kumar BERA Sushil kumar SRIVASTAV Regional Remote Sensing Centre-West National Remote Sensing CentreIndian Space Research OrganisationJodhpur 342005India Department of Geography School of Earth SciencesBharathidasan UniversityTiruchirappalli 620024India Centre for Climate Change and Water Research Suresh Gyan Vihar UniversityJaipur 302017India Department of Geography Panjab UniversityChandigarh 160014India National Remote Sensing Centre Indian Space Research OrganisationHyderabad 500037India Regional Centres National Remote Sensing CentreIndian Space Research OrganisationNew Delhi 110049India

High Mountain Asia(HMA),recognized as a third pole,needs regular and intense studies as it is susceptible to climate *** accurate and high-resolution Digital Elevation Model(DEM)for this region enables us to analyze it in a 3D environment and understand its intricate role as the Water Tower of *** science teams of NASA realized an 8-m DEM using satellite stereo imagery for HMA,termed HMA 8-m *** this research,we assessed the vertical accuracy of HMA 8-m DEM using reference elevations from ICESat-2 geolocated photons at three test sites of varied topography and land *** were made from statistical quantifiers and elevation *** the world’s highest mountain,Mount Everest,and its surroundings,Root Mean Squared Error(RMSE)and Mean Absolute Error(MAE)resulted in 1.94 m and 1.66 m,respectively;however,a uniform positive bias observed in the elevation profiles indicates the seasonal snow cover change will dent the accurate estimation of the elevation in this sort of test *** second test site containing gentle slopes with forest patches has exhibited the Digital Surface Model(DSM)features with RMSE and MAE of 0.58 m and 0.52 m,*** third test site,situated in the Zanda County of the Qinghai-Tibet,is a relatively flat terrain bed,mostly bare earth with sudden river cuts,and has minimal errors with RMSE and MAE of 0.32 m and 0.29 m,respectively,and with a negligible ***,in one more test site,the feasibility of detecting the glacial lakes was tested,which resulted in exhibiting a flat surface over the surface of the lakes,indicating the potential of HMA 8-m DEM for deriving the hydrological *** results accrued in this investigation confirm that the HMA 8-m DEM has the best vertical accuracy and should be of high use for analyzing natural hazards and monitoring glacier surfaces.

关键词： High Mountain Asia Digital Elevation Model ICESat-2 geolocated photons Accuracy assessment

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CuO–TiO_(2) based self-powered broad band photodetector

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Nano Materials Science 2024年第3期6卷 345-354页

作者： Chiranjib ghosh Arka Dey Iman Biswas Rajeev kumar Gupta Vikram Singh Yadav Ashish Yadav Neha Yadav Hongyu Zheng Mohamed Henini Aniruddha Mondal Department of Physics National Institute of Technology DurgapurWest BengalIndia Department of Physics University of Petroleum&Energy Studies DehradunUttarakhandIndia Babasaheb Bhimrao Ambedkar University Lucknow226031India Center for Advanced Laser Manufacturing(CALM) Shandong University of TechnologyZibo255000PR China School of Physics and Astronomy University of NottinghamNottinghamNG72RDUnited Kingdom

An efficient room-temperature self-powered,broadband(300 nm–1100 nm)photodetector based on a CuO–TiO_(2)/TiO_(2)/p-Si(100)heterostructure is *** CuO–TiO_(2)nanocomposites were grown in a two-zone horizontal tube furnace on a 40 nm TiO_(2)thin film deposited on a p-type Si(100)*** CuO–TiO_(2)/TiO_(2)/p-Si(100)devices exhibited excellent rectification characteristics under dark and individual photoillumination *** devices showed remarkable photo-response under broadband(300–1100 nm)light illumination at zero bias voltage,indicating the achievement of highly sensitive self-powered photodetectors at visible and near-infrared light *** maximum response of the devices is observed at 300 nm for an illumination power of 10 *** response and recovery times were calculated as 86 ms and 78 ms,***,under a small bias,the devices showed a prompt binary response by altering the current from positive to negative under illumination *** main reason behind this binary response is the low turn-on voltage and photovoltaic characteristics of the *** illumination conditions,the generation of photocurrent is due to the separation of photogenerated electron-hole pairs within the built-in electric field at the CuO–TiO_(2)/TiO_(2)*** characteristics make the CuO–TiO_(2)/TiO_(2)broadband photodetectors suitable for applications that require high response speeds and self-sufficient functionality.

关键词： Self-powered CuO–TiO_(2) nanocomposite Broadband photodetector Two-zone horizontal tube furnace Responsivity

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Pharmacokinetics and Bioequivalence of Dienogest in Healthy Bangladeshi Female Volunteers: An Open-Label, Single-Dose, Randomized, Two-Way Crossover Study

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Open Journal of Obstetrics and Gynecology 2024年第5期14卷 779-789页

作者： Nusrat Mahmud Nafisa Ahamed Uttom kumar Bhowmik Sabrina Akter Tushi Nayan ghosh Nithon Chandra Sahana Arifa Akram Md. Alimur Reza BIRDEM General Hospital Dhaka Bangladesh Medical College for Women & Hospital Dhaka Bangladesh Novus Clinical Research Services Ltd. Dhaka Bangladesh National Institute of Laboratory Medicine & Referral Centre (NILMRC) Dhaka Bangladesh

Background: Dienogest is a potential treatment for pelvic pain associated with endometriosis, a condition of significant concern in gynaecology. The current study was conducted as a crossover-randomized bioequivalence assessment of two oral Dienogest 2 mg formulations, aiming to provide valuable insights for healthcare professionals and researchers in this field. Objective: The primary aim of this research was to evaluate and compare the pharmacokinetic characteristics of Dienogest 2 mg tablets. Dinogest (Dienogest 2 mg) tablets, manufactured by Nuvista Pharma Limited in Bangladesh, and Visanne (Dienogest 2 mg) tablets, manufactured by Bayer Pharma in Germany, were the test and reference formulations, respectively. Materials and Method: The study was an open-label, balanced, randomized, two treatments, two sequences, two periods, two-way crossover, laboratory blind, single oral dose bioequivalence study conducted in healthy adult females under fasting conditions. The study was carried out on 13 healthy, non-pregnant female subjects, and all the subjects completed both study periods with a 15-day washout in between. Randomization was used to assign the test and reference formulations to the subjects. Following each oral administration, a series of blood samples were obtained at different time intervals from pre-dose to 72 hours post-dose and analyzed for Dienogest concentrations using a validated bio-analytical method. A standard non-compartmental model was used to analyze the pharmacokinetic parameters. The primary pharmacokinetic parameters were peak plasma drug concentration (Cmax), the area under the plasma concentration-time curve from time zero to time t (AUC0–t), and AUC from t = 0 to infinity (AUC0–∞). The other PK parameters included time to reach Cmax (Tmax), terminal elimination rate constant (Kel), and half-life (t1/2). Result: The ratios and 90% CI for the geometric mean test/re

关键词： Dienogest Bioequivalence Study Endometriosis Novus CRSL

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