Showing papers by "Indumathi M. Nambi published in 2018"
TL;DR: Health risk assessment was conducted for exposure to PAHs in the ground water using incremental life time cancer risk (ILCR) models coupled with benzo[a]pyrene toxic equivalent method and showed that the cancer risk is predominantly contributed by dermal exposure than the oral in both adults and children.
84 citations
TL;DR: Field observations and laboratory data show that the seawalls and groins, which were installed along the Chennai shoreline to manage coastal erosion problems, played a significant role in controlling the oil deposition patterns, and the Chennai oil spill residues have unique fingerprints of hopanes and steranes which can be used to track the spill.
80 citations
TL;DR: Ferrocene functionalized graphene based graphite felt electrode was firstly investigated for heterogeneous electro-Fenton oxidation of ciprofloxacin in neutral pH condition and electrode reusability study was performed to understand the electrode stability.
70 citations
TL;DR: This study mainly reviews the evolution and transportation of ARGs in detail for Indian scenario and reports the risks, benefits, and ARGs development mechanisms from food animals to humans and to the environment.
Abstract: Antibiotics are majorly used in food animals for growth promotion and prophylactic purposes in public health and environment. The aim of this review is mainly to discuss about the antibiotics usage in poultry, livestock and aquaculture sectors, particularly in India, and the identification of antibiotic resistance in animals, their corresponding antibiotic resistance genes (ARGs) (if investigated) and their dissemination among environmental compartments in various parts of the country. It also discusses about the classification and mechanism of action of different antibiotics. It reports the risks, benefits, ARGs development mechanisms from food animals to humans and to the environment. Most of the current studies are done in the medical field on regulating/restricting antibiotic usage and tracking the propagation of ARGs in bacterial samples of sick patients and also report the identification of antibiotics and ARGs in wastewater treatment plant effluents across various countries. This study mainly reviews the evolution and transportation of ARGs in detail for Indian scenario.
69 citations
TL;DR: In this paper, the authors used ferrocene functionalized electrochemically reduced graphene oxide (Fc-ErGO) as electro-Fenton catalyst in rotating disc electrode system for the continuous generation of reactive oxygen species without external aeration.
42 citations
TL;DR: In this paper, an energy efficient electrochemical strategy to remediate hexavalent chromium Cr(VI) to less toxic Cr(III) was reported, where the use of titania nanotubes (TNT) synthesized by anodization as cathode for the reduction of chromium with alkaline urea as an anolyte additive.
32 citations
TL;DR: In this article, the authors present the temporal characteristics of toxic fine particulate matter emissions from a 30-year old municipal solid waste (MSW) dumpsite and associated health risks.
30 citations
TL;DR: In this article, the use of disposed liquid crystal display (LCD) glass as a supporting matrix for the fabrication of a binder/linker free thin film graphene electrode was demonstrated.
Abstract: This study demonstrates the use of disposed liquid crystal display (LCD) glass as a supporting matrix for the fabrication of a binder/linker free thin film graphene electrode. Graphene oxide (GO) was drop casted onto the LCD matrix and electrochemically reduced to form an ErGO–LCD electrode which was subsequently employed for the electro-Fenton oxidation of ciprofloxacin. Fourier transform infrared spectroscopy confirms the presence of (i) functional groups such as C═O, N–H, C≡N, and C–N on the LCD matrix, (ii) attachment of GO onto the LCD, and (iii) reduction of oxygen functionalities at the surface of the ErGO–LCD electrode. Raman and X-ray photoelectron spectroscopy were performed to examine the nature and chemical composition of the GO–LCD and ErGO–LCD electrodes. Cyclic voltammetry and electrochemical impedance spectroscopic studies revealed the enhancement of the oxidation–reduction properties and reduction of charge transfer resistance (Rct 17 Ω) in the presence of [Fe(CN)6]3–/4– redox species. El...
18 citations
TL;DR: This book aims to provide a history of Czechoslovakia and its literature over a period of 175 years from 1989 to 2002, a period chosen in order to explore its roots as well as specific cases up to and including the year of the Velvet Revolution.
Abstract: Author(s): Beegum, Sahila; Simunek, Jiri; Szymkiewicz, Adam; Sudheer, KP; Nambi, Indumathi M
16 citations
TL;DR: In this paper, the meso zero-valent iron particles (mZVI) emplaced in porous media overcomes the concerns associated with in situ groundwater remediation technologies.
8 citations
TL;DR: In this paper, a finite volume method is used to delineate the capture zones and examine the energies within. But, very little research has been reported on the energy of groundwater flow and specifically that associated with the well capture zones.
01 Jan 2018
TL;DR: In this article, the entrapment process and residual Hg0 quantification can be described by two-phase capillary pressure water saturation (Pc-Sw) experiments and pore-scale micromodel experiments.
Abstract: Accidental spills or industrial disposals of elemental mercury (Hg0) result in contamination of subsurface soil and groundwater. Hg0 is a highly dense non-aqueous fluid whose physico-chemical properties govern its fate and transport in the subsurface. Owing to its liquid state and high density, it percolates down the subsurface by gravity forces and tends to pool when it reaches any impervious barrier. On the other hand, its low solubility and high interfacial tension tend to counteract its downward gravity movement and favour entrapment of a small volume of Hg0 in the pore spaces of the subsurface. The trace fraction of entrapped Hg0 termed as residual Hg0 may bring about severe groundwater contamination due to its chemical and biological transformations to more mobile and more toxic inorganic and organic mercury compounds. It is hypothesized that Hg0 behaves as a typical dense non-aqueous liquid and migrates under the influence of capillary, gravity and viscous forces, and eventually gets entrapped in void spaces of the subsurface. The entrapment process and residual Hg0 quantification can be described by two-phase capillary pressure water saturation (Pc–Sw) experiments and pore-scale micromodel experiments.