Výsledky vyhledávání - "Ambalika Niyogi"

Raman, Infrared, and Chemical Characterization of Fly Ash-Generated Spherules

Autor: D. Panda, M. K. Panigrahi, Jayanta Kumar Pati, G. Parthasarathy, Munmun Chakarvorty, Ambalika Niyogi

Publikováno v: Journal of Applied Spectroscopy. 85:856-863

The majority of studies on silicate glass spherules containing fly ash deal only with the determination of their chemical composition. Nearly 70 vol.% of fly ash is comprised of silicate glass spherules. Here, we report spectroscopic properties of si

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f29e4c7c62d891b1e60cd4fdf033e54e
https://doi.org/10.1007/s10812-018-0729-y

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Magnetic measurements and geochemical characterization of the road-deposited sediments (RDS), Allahabad city, India: impact of climatic perturbations on sediment composition and provenance tracing

Autor: Ambalika Niyogi, Shiva Kumar Patil, Munmun Chakarvorty, D. Panda, Jayanta Kumar Pati

Publikováno v: Journal of Soils and Sediments. 18:2581-2595

Magnetic measurements provide quantitative data on urban pollution (including heavy metal content) which correlate significantly with geochemical analysis and better constrain the source character of pollutants. The present study is aimed to map the

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https://doi.org/10.1007/s11368-018-1936-0

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Effect of seasonal variation on dust samples of a winter fog affected urban environment of India, South East Asia

Autor: Munmun Chakarvorty, Ambalika Niyogi, Jayanta Kumar Pati, K. Prakash

Publikováno v: International Journal of Environmental Analytical Chemistry. 97:1266-1282

Physical and chemical characteristics of leaf dust (LD) samples, collected between 2011 and 2013, of a severely winter fog affected and polluted urban environment (Allahabad, India) of Indo-Gangetic plain are presented in this study. The weather chan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::261e5dd192dd9889baf7ff9cb120c1c8
https://doi.org/10.1080/03067319.2017.1408805

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Assessment of topsoil contamination in an urbanized interfluve region of Indo-Gangetic Plains (IGP) using magnetic measurements and spectroscopic techniques

Autor: Munmun Chakarvorty, Abhishek K. Rai, Anamika Pandey, Ambalika Niyogi, Kamlesh Pandey, Jayanta Kumar Pati, K. Prakash, Mrigank Mauli Dwivedi, Shubham Gupta, Anuj Kumar Singh

Publikováno v: Environmental Monitoring and Assessment. 191

The magnetic susceptibility (MS) measurements are used for rapid and cost-effective soil surveys and for accessing heavy metal contamination worldwide. In the sub-Himalayan plains of India, nearly 6.05 × 104 km2 area of most the fertile land occurs

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https://doi.org/10.1007/s10661-019-7525-x

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Physical characterization, magnetic measurements, REE geochemistry and biomonitoring of dust load accumulated during a protracted winter fog period and their implications

Autor: Shiva Kumar Patil, Jayanta Kumar Pati, Arun K. Saraf, Ambalika Niyogi, Munmun Chakarvorty, Swati Shukla

Publikováno v: Environmental Monitoring and Assessment. 186:2965-2978

The winter fog in India is a recurrent phenomenon for more than a decade now affecting the entire Himalayan and sub-Himalayan regions covering an area of nearly 500,000 km2. Every winter (December–January), the air and surface transports in cities

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ec8ab77653c9f982fa89ab79b2a547e
https://doi.org/10.1007/s10661-013-3594-4

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Anthropogenic and impact spherules: Morphological similarity and chemical distinction – A case study from India and its implications

Autor: D. Panda, Jayanta Kumar Pati, Ambalika Niyogi, Shiv K Patil, S. C. Patel

Publikováno v: Journal of Earth System Science. 120:1043-1054

This paper provides first report of silica-rich anthropogenic spherules of varying colour, shape, size, surface texture and chemical composition found in road-deposited sediments (RDS) of Allahabad city, Uttar Pradesh, India. Morphological details an

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https://doi.org/10.1007/s12040-011-0125-y

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Geochemistry and magnetic measurements of suspended sediment in urban sewage water vis-à-vis quantification of heavy metal pollution in Ganga and Yamuna Rivers, India

Autor: Ambalika Niyogi, J. K. Pati, Munmun Chakarvorty, Anil D. Shukla, Sujeet Kumar, Akhil Kumar Dwivedi, Mavera Usmani

Publikováno v: Environmental Monitoring and Assessment. 187

Sewage water is becoming a key source of heavy metal toxicity in large river systems worldwide and the two major Himalayan Rivers in India (Ganga and Yamuna) are severely affected. The high population density in the river banks combined with increase

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd4279589169bb5ddd88fc7ff329d224
https://doi.org/10.1007/s10661-015-4794-x

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Micro-chemical analysis of anthropogenic spherules and its role in spherule type discrimination

Autor: Ambalika Niyogi, Jayanta K. Pati, Dipak Panda, Munmun Chakarvorty, Mavera Usmani

Department of Earth and Planetary Sciences, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India E-mail : ambalika.niyogi@gmail.com EPMA Laboratory (PLANEX), Physical Research Laboratory, Thaltej Campus, Ahmedabad-380 009, Gujarat, India

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