Sushma Singh - Academia.edu (original) (raw)

Papers by Sushma Singh

Journal of International Academy Of Physical Sciences, Sep 15, 2011

A simple and straightforward theoretical model is developed to investigate the elastic constants ... more A simple and straightforward theoretical model is developed to investigate the elastic constants for ionic solids under the effect of temperature. The calculation are performed with the help of high temperature equation of state (EOS) derived from Tallon's method based on thermodynamic analysis. The results obtained for ionic solids are discussed and compared with experimental data under the effect of high temperature. The results are found to be in good agreement with available experimental results and thus may be helpful in analyzing the other's experimental results.

Environmental Toxicology, 2009

Efforts have been made to evaluate the possible risks of metal bioaccumulation in composting eart... more Efforts have been made to evaluate the possible risks of metal bioaccumulation in composting earthworms during vermicomposting of hazardous wastes, e.g., sewage sludge. The sewage sludge was diluted by mixing cow dung in different proportions, and vermicomposted sludge as well as inoculated earthworms were analyzed for metal (Fe, Cu, Zn, Pb) contents. The sludge processed by worms showed a significant reduction in concentration of metals, Cu (29.4–51.6%), Fe (13.1–19.9%), Zn (15.2–25.8%), and Pb (4.6–46.9%), at the end. A considerable concentration of metals, total Cu (16.7–27.6 mg kg−1), total Fe (42.9–89.8 mg kg−1), total Zn (5.85–75.0 mg kg−1), and total Pb (1.79–12.4 mg kg−1), in composting earthworms was also recorded. The greater values of bioconcentration factors for metals suggested the possible risk of entering contaminants in higher food chains; since, earthworms are near to the terrestrial food chain, they can potentially mediate metal transfer from soil to a range of pre...

Journal of International Academy Of Physical Sciences, Sep 15, 2011

A simple and straightforward theoretical model is developed to investigate the elastic constants ... more A simple and straightforward theoretical model is developed to investigate the elastic constants for ionic solids under the effect of temperature. The calculation are performed with the help of high temperature equation of state (EOS) derived from Tallon's method based on thermodynamic analysis. The results obtained for ionic solids are discussed and compared with experimental data under the effect of high temperature. The results are found to be in good agreement with available experimental results and thus may be helpful in analyzing the other's experimental results.

Environmental Toxicology, 2009

Efforts have been made to evaluate the possible risks of metal bioaccumulation in composting eart... more Efforts have been made to evaluate the possible risks of metal bioaccumulation in composting earthworms during vermicomposting of hazardous wastes, e.g., sewage sludge. The sewage sludge was diluted by mixing cow dung in different proportions, and vermicomposted sludge as well as inoculated earthworms were analyzed for metal (Fe, Cu, Zn, Pb) contents. The sludge processed by worms showed a significant reduction in concentration of metals, Cu (29.4–51.6%), Fe (13.1–19.9%), Zn (15.2–25.8%), and Pb (4.6–46.9%), at the end. A considerable concentration of metals, total Cu (16.7–27.6 mg kg−1), total Fe (42.9–89.8 mg kg−1), total Zn (5.85–75.0 mg kg−1), and total Pb (1.79–12.4 mg kg−1), in composting earthworms was also recorded. The greater values of bioconcentration factors for metals suggested the possible risk of entering contaminants in higher food chains; since, earthworms are near to the terrestrial food chain, they can potentially mediate metal transfer from soil to a range of pre...