Browsing by Author "Chakraborty, P."
Now showing items 21-40 of 49
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Geochemical fractionation of Ni, Cu and Pb in the deep sea sediments from the Central Indian Ocean Basin: An insight into the mechanism of metal enrichment in sediment
Sensarma, S.; Chakraborty, P.; Banerjee, R.; Mukhopadhyay, S. (Elsevier, 2016)Metal speciation study in combination with major element chemistry of deep sea sediments provided possible metal enrichment pathways in sediments collected from environmentally different locations of Central Indian Ocean ... -
Geochemical partitioning of Cu and Ni in mangrove sediments: Relationships with their bioavailability
Chakraborty, P.; Ramteke, D.; Chakraborty, S. (Elsevier, 2015)Sequential extraction study was performed to determine the concentrations of non-residual metal-complexes in the mangrove sediments from the Divar Island, (west coast of India). Accumulation of metal in the mangrove roots ... -
Impact of salinity and pH on phytoplankton communities in a tropical freshwater system: An investigation with pigment analysis by HPLC
Chakraborty, P.; Acharyya, T.; Babu, P.V.R.; Bandyopadhyay, D. (The Royal Society of Chemistry, 2011)An in vitro study was carried out to understand the effects of salinity shock and variation in pH on phytoplankton communities in a tropical freshwater system of the Godavari River (a major peninsular river in India). The ... -
Interactions of mercury with different molecular weight fractions of humic substances in aquatic systems.
Chakraborty, P.; Yao, K.M.; Chennuri, K.; Vudamala, K.; Babu, P.V.R. (Springer, 2014)Interactions of mercury (Hg) with different molecular weight fractions of humic substances (HS) play an important role in controlling distribution, diffusion, speciation, and bioavailability of Hg in natural systems. This ... -
Intra-annual variations of arsenic totals and species in tropical estuary surface sediments
Chakraborty, P.; Jayachandran, S.; Babu, P.V.R.; Karri, S.; Tyadi, P.; Yao, K.M.; Sharma, B.M. (Elsevier, 2012)Arsenic totals and species were found to vary during a one year period in the surface sediments of Godavari estuary (the third largest river in India). This study suggests that increasing salinity of overlying water column ... -
Kinetic and equilibrium based fractionation study of Pb in continental shelf sediment of India
Chakraborty, S.; Chakraborty, P.; Sarkar, Arindam; Nath, B.N. (Elsevier, 2017)Two independent analytical methods (kinetic and sequential extraction protocols) were used to understand the distribution, stability, and lability of Pb-sediment complexes in Indian continental shelf. The concentrations ... -
Kinetic speciation and bioavailability of copper and nickel in mangrove sediments
Chakraborty, P.; Chakraborty, S.; Ramteke, D.; Chennuri, K. (Elsevier, 2014)An attempt was made to establish a mechanistic linkage between chemical speciation of copper and nickel, and their bioavailability in mangrove ecosystem. Kinetic speciation study was performed to determine the concentrations ... -
Kinetic speciation of mercury–humate complexes in aqueous solutions by using competing ligand exchange method
Vudamala, K.; Chakraborty, P. (Elsevier, 2016)Competing ligand exchange method (CLEM) in conjunction with direct mercury analyzer (DMA) was found to be a useful method for kinetic speciation study of (mercury–humic acid) Hg–HA complexes in aqueous systems. Ambersep ... -
Lead distribution in coastal and estuarine sediments around India
Chakraborty, S.; Chakraborty, P.; Nath, B.N. (Elsevier, 2015)This study describes the geochemical distribution of lead (Pb) and identifies the critical factors that significantly control Pb distribution and speciation in coastal and estuarine sediments around India by using published ... -
Linkage between speciation of Cd in mangrove sediment and its bioaccumulation in total soft tissue of oyster from the west coast of India
Chakraborty, P.; Ramteke, D.; Gadi, S.D.; Bardhan, P. (Elsevier, 2016)This study established a mechanistic linkage between Cd speciation and bioavailability in mangrove system from the west coast of India. High bioaccumulation of Cd was found in the oyster (Crassostrea sp.) even at low Cd ... -
Mercury exposure and Alzheimer's disease in India: An imminent threat?
Chakraborty, P. (Elsevier, 2017)India is an industrial giant with one of the fastest growing major economies in the world. Primary energy consumption in India is third after China and the USA. Greater energy production brings the burden of increasing ... -
Mercury profiles in sediment from the marginal high of Arabian Sea: An indicator of increasing anthropogenic Hg input
Chakraborty, P.; Vudamala, K.; Chennuri, K.; Armoury, K.; Linsy, P.; Ramteke, D.; Sebastian, T.; Jayachandran, S.; Naik, C.; Naik, R.; Nath, B.N. (Springer, 2016)Total Hg distributions and its speciation were determined in two sediment cores collected from the western continental marginal high of India. Total Hg content in the sediment was found to gradually increase (by approximately ... -
Mercury speciation in coastal sediments from the central east coast of India by modified BCR method.
Chakraborty, P.; Babu, P.V.R.; Vudamala, K.; Ramteke, D.; Chennuri, K. (Elsevier, 2014)This is the first study to describe distribution and speciation of Hg in coastal sediments from the central east coast of India. The concentrations of Hg in the studied sediments were found to be much lower than the Hg ... -
Molecular characteristics of sedimentary organic matter in controlling mercury (Hg) and elemental mercury (Hg0) distribution in tropical estuarine sediments
Padalkar, P.P.; Chakraborty, P.; Chennuri, K.; Jayachandran, S.; Sitlhou, L.; Nanajkar, M.; Tilvi, S.; Singh, K.S. (Elsevier, 2019)Sedimentary organic matter (SOM) plays an important role in hosting and reducing HgII in marine/estuarine sediment. This study provides a better understanding on the influence of nature of SOM, in regulating sedimentary ... -
Operationally defined mercury (Hg) species can delineate Hg bioaccumulation in mangrove sediment systems: A case study
Chennuri, K.; Chakraborty, P.; Jayachandran, S.; Mohakud, S.K.; Ishita, I.; Ramteke, D.; Padalkar, P.P.; PrakashBabu, C.; Babu, K.R. (2020)This study investigated the linkage between mercury (Hg) speciation in the surficial sediments from a mangrove ecosystem of the Zuari Estuary, west coast of India, with Hg bioaccumulation in gastropods collected from the ... -
Organic matter - A key factor in controlling mercury distribution in estuarine sediment
Chakraborty, P.; Sarkar, Arindam; Vudamala, K.; Naik, R.; Nath, B.N. (Elsevier, 2015)Organic matter (OM) was found to play an important role in controlling mercury (Hg) distribution and speciation in estuarine sediment of the Vembanad Lake. The sedimentary organic carbon (OC) from the northern part of the ... -
Oyster reef restoration in controlling coastal pollution around India: A viewpoint
Chakraborty, P. (Elsevier, 2017)Coastal waters receive large amounts of nutrients and pollutants from different point and nonpoint sources through bays and estuaries. Excess supply of nutrients in coastal waters may have detrimental effects, leading to ... -
Partitioning of metals in different binding phases of tropical estuarine sediments: importance of metal chemistry
Chakraborty, P.; Chakraborty, S.; Vudamala, K.; Sarkar, Arindam; Nath, B.N. (Springer, 2016)Distribution of metals in different binding phases of estuarine sediments provides chemically significant description of metal–sediment interactions. This study describes the influences of ligand field stabilization energy ... -
Post depositional changes of sedimentary organic matter influence chromium speciation in continental slope sediments - A case study
Jayachandran, S.; Chakraborty, P.; Sarkar, Arindam; Kumar, Deepak; Ishita; PrakashBabu, C. (Elsevier, 2021)Influences of post depositional changes of sedimentary organic matter (SOM) on chromium (Cr) speciation in continental slope sediments from the east and west coast of India are presented in this study. Average concentrations ... -
Reduction of mercury (II) by humic substances-influence of pH, salinity of aquatic system
Chakraborty, P.; Vudamala, K.; Coulibaly, M.; Ramteke, D.; Chennuri, K.; Lean, D. (Springer, 2015)This study demonstrates that under abiotic dark conditions in aquatic system, humic substances are not only capable of converting Hg(II) to Hg<sup>0</sup> but also able to bind Hg(II) ion. The degree of Hg(II) reduction ...