Browsing by Author "Pooja Devi"

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A critical review on the research trends and emerging technologies for arsenic decontamination from water
(Elsevier B.V., 2021) Pardeep Singh; Anwesha Borthakur; Rishikesh Singh; Rahul Bhadouria; Vipin Kumar Singh; Pooja Devi
To understand the current research output on arsenic (As) removal and research related to the As contamination, a bibliometric analysis based on Scopus database was carried out. The analysis includes the research covering the leading countries and year wise literature outputs. Bibliometric analysis revealed increasing trend in research published on As removal (more than 1200 articles) using physico-chemical methods during 1995 onwards and United States of America (USA) as leading contributor. Among different research institutions, Chinese Academy of Sciences has contributed maximally to research articles reaching up to 950 and maximum 635 research articles were published in the journal Environmental Science and Technology with respect to As removal using physico-chemical methods. With respect to As removal using biological methods, around 400 research articles were recorded during 1995 onwards and maximum article contribution (1052) was registered for China followed by USA (964). Based on Scopus data 2021, maximum 222 articles on As removal using biological methods were recorded for the journal ‘Chemosphere’. The present review emphasizes on currently available physico-chemical as well as emerging treatment processes for the removal of As, generally occurring as arsenite and arsenate, from drinking water. It has been suggested by various studies that a combination of low-cost physico-chemical treatment methodologies like ion exchange, reverse osmosis, precipitation, filtration and adsorption along with biological methods can be a safe alternative for As removal from drinking water. Overall, the study suggests that there is a strong need for further research on efficient processes involving lab to land approaches for As removal from groundwater in order to reduce the toxicity and contamination of As in drinking water. © 2021 Elsevier B.V.
Efficient energy storage performance of in situ grown Co3V2O8-RGO composite nanostructure for high performance asymmetric Co3V2O8-RGO//RGO supercapacitors and consequence of magnetic field induced enhanced capacity
(Elsevier Ltd, 2021) Pooja Devi; Manish Srivastava; Nam Hoon Kim; Joong Hee Lee; Debabrata Mishra
In this work, cobalt vanadate/reduced graphene oxide (Co3V2O8/RGO) composite nanostructure has been synthesized via in-situ reduction of graphene oxide (GO) in the presence of cobalt chloride and sodium metavanadate through hydrothermal following post calcinations treatment. Characterizations through various techniques have been performed to probe the physicochemical properties of Co3V2O8/RGO, RGO and Co3V2O8 nanostructures. Our Results show that because of the synergistic effect, Co3V2O8/RGO composite nanostructure exhibits superior electrochemical properties as compared to bare RGO and Co3V2O8. At a current density of 0.5 A/g the specific capacity has been recorded to be 118.82, ∼179, and ∼241.67 Cg-1 in case of Co3V2O8, RGO and Co3V2O8/RGO nanostructures, respectively. Moreover, Co3V2O8/RGO composite nanostructure (positive electrode) and RGO (negative electrode) have been employed to prepare the asymmetric supercapacitor, exhibited high specific capacity (127.62Cg-1), energy density (28.36 Whkg−1), and power density (400 Wkg-1) at a current density 0.5 A/g. This asymmetric supercapacitor shows excellent capacity retention (∼91.64%) and columbic efficiency (∼98.61%) measured at a current density of 5 A/g after 10,000 charge/discharge cycles. More importantly, a dramatic increase ∼170% (344 Cg-1) and ∼67% (185 Cg-1) in the specific capacity have been recorded at a current density of 0.5 A/g and 1.0 A/g, respectively when asymmetric supercapacitor device is subjected to an external magnetic field of strength of 0.5 T. Additionally, under the applied magnetic field, capacity retention ∼97.75% and columbic efficiency ∼98.84% has been recorded at a current density of 5 A/g after 10,000 cycles. © 2021 Elsevier Ltd
Environmental and health impacts of contaminants of emerging concerns: Recent treatment challenges and approaches
(Elsevier Ltd, 2021) Deepak Yadav; S. Rangabhashiyam; Pramit Verma; Pardeep Singh; Pooja Devi; Pradeep Kumar; Chaudhery Mustansar Hussain; Gajendra Kumar Gaurav; Kuppusamy Sathish Kumar
In the past few decades, new contaminants of emerging concern (CECs) in the air, water, and soil have gained significant attention due to their adverse impact on human health and the environment. The sources of CECs have been identified in different forms from domestic and industrial activities such as personal care products and pharmaceuticals. It has been established that aqueous medium plays a major role in the dissemination of various contaminants, like drinking water, reservoirs, lakes, rivers and waste with water medium. There remains inadequate technology for the treatment of CECs in the wastewater systems. Though different techniques have advanced for the treatment of CECs, they still pose a severe threat to human health and disturb the ecological balance. In this review, the characteristics, recent technologies, risk assessment and management of CECs have been discussed. The primary aim is to highlight the new innovative and cost-effective technologies for the remediations of CECs in all forms. Biochar is readily and economically available in abundance and an economical adsorbent with 100% adsorptive removal for H2PO4−. The bibliometric analysis also performed to understand the emerging research trends on the treatment techniques, which can help in developing a guiding pathway to modern research in academia and industry. © 2021 Elsevier Ltd
Understanding adoption intention and perceived satisfaction of startup entrepreneurs towards FinTech services
(Emerald Publishing, 2025) Pooja Devi; V. Shunmugasundaram
Purpose – Despite widespread adoption of FinTech services, like mobile banking adoption, AI adoption and adoption of blockchain technologies, FinTech services such as crowdfunding among startup entrepreneurs are significantly lacking in developing countries, such as India in particular. The purpose of this study is to examine the perceived satisfaction of startup entrepreneurs with the adoption of crowdfunding platforms, considering FinTech as an innovative solution for financing their startups. Design/methodology/approach – The research model is framed using the 246 valid responses from startup entrepreneurs using Fintech services to finance their startups. Nonprobability convenient sampling and the PLS-SEM technique are used for data analysis. Findings – This study assured that the three elements, namely, Performance Expectancy, Social Influence and Perceived Trust, significantly determine the perceived satisfaction of startup entrepreneurs through the adoption of FinTech services for raising finance. Results indicate that Performance Expectancy (Formula prsented) is the strongest predictor of adoption Intention. Contrary to Effort Expectancy, the result shows that it is insignificant in determining Perceived Satisfaction used from the adoption intention of FinTech services. This study also analyzes the mediation effect of adoption intention between Performance Expectancy, Effort Expectancy, Social Influence and Perceived Trust with Perceived Satisfaction. Research limitations/implications – The main limitation of this study is that it only considers the startups from Lucknow for the analysis and excludes the other startups of Uttar Pradesh. The findings of this study provide insights to policymakers, other entrepreneurs and the government to design important strategies and campaigns that should encourage the adoption among the startups that lead to their growth. Originality/value – This study is exceptional in its type as it concentrated on examining the indirect effect of the three unified theory of acceptance and use of technology constructs and one additional variable, that is, Perceived Trust on Perceived Satisfaction, by focusing on startup entrepreneurs, as no specific study has been conducted so far on startup entrepreneurs. © 2025 Emerald Publishing Limited