Dr Abida Kausar - Academia.edu (original) (raw)

Papers by Dr Abida Kausar

Research paper thumbnail of Batch versus column modes for the adsorption of radioactive metal onto rice husk waste: conditions optimization through response surface methodology

Water science and technology : a journal of the International Association on Water Pollution Research, 2017

Batch and column adsorption modes were compared for the adsorption of U(VI) ions using rice husk ... more Batch and column adsorption modes were compared for the adsorption of U(VI) ions using rice husk waste biomass (RHWB). Response surface methodology was employed for the optimization of process variables, i.e., (pH (A), adsorbent dose (B), initial ion concentration (C)) in batch mode. The B, C and C(2) affected the U(VI) adsorption significantly in batch mode. The developed quadratic model was found to be validated on the basis of regression coefficient as well as analysis of variance. The predicted and actual values were found to be correlated well, with negligible residual value, and B, C and C(2) were significant terms. The column study was performed considering bed height, flow rate and initial metal ion concentration, and adsorption efficiency was evaluated through breakthrough curves and bed depth service time and Thomas models. Adsorption was found to be dependent on bed height and initial U(VI) ion concentration, and flow rate decreased the adsorption capacity. Thomas models ...

Research paper thumbnail of Anticancer Activity of Natural Bioactive Compounds against Human Carcinoma Cell Lines - A mini review

Romanian Biotechnological Letters, 2019

Cancer is one of the most stern health dilemmas engulfing 7 million lives every year globally. It... more Cancer is one of the most stern health dilemmas engulfing 7 million lives every year globally. It is group of more than 100 diseases. Conventional cancer therapies burdened the disease crippled patient with lethal side effects and are also very expensive. Therefore, the demand to use alternative approaches in treatment of cancer is escalating. Plants of earth are massive reservoir of bioactive compounds. Plant derived compounds such as protoapigenone, casticin, moursin, gypenosides VN5, kalopanaxsaponin A, sapindoside B7, maclekarpine C are foremost anticancer agents, due to their unique structure and sophisticated mechanism of action. The present review is aimed at compiling data on promising classes of bioactive compounds from medicinal plants and their anti cancer mechanism of action against different human carcinoma cell lines.

Research paper thumbnail of Equilibrium, kinetic and thermodynamic studies on removal of Cd(II), Pb(II) AND As(V) from wastewater using carp (cyprinus carpio) scales

Research paper thumbnail of Biocomposite of sodium-alginate with acidified clay for wastewater treatment: Kinetic, equilibrium and thermodynamic studies

International Journal of Biological Macromolecules, 2020

Clay-based composites were prepared, characterized, and applied for the elimination of Blue FBN (... more Clay-based composites were prepared, characterized, and applied for the elimination of Blue FBN (BFBN) and Rose FRN (RFRN) dyes. The Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), Thermogravimetric (TGA) and X-ray diffraction analyses were performed to check the interaction of dye molecule with adsorbents. The analysis showed a successful interaction between adsorbent and dyes ions. The experimental data was best fitted with Freundlich isotherm for both dyes (BFBN and RFRN). The findings revealed that at 80 min the adsorption grasped equilibrium in the case of both dyes and succeeded the pseudo-second-order kinetics model. Furthermore, the enthalpy (ΔH°), Gibbs free energy (ΔG°) and entropy (ΔS°) changes suggested that adsorption was exothermic, physical and spontaneous in nature. The maximum adsorption capacities were determined as 76.39% for BFBN and 59.85% for RFRN dye at pH 2.0 and 30 °C. Composites found to be stable at higher temperature and regenerated using MgSO4 eluting agent. The textile effluent colour was removed up to 50.35 and 54.95% using raw and modified clay, respectively. The modified clay showed promising efficiency for adsorption of synthetic BFBN and RFRN dyes from aqueous solution, which could be a viable option for the treatment of industrial wastewater and textile effluents.

Research paper thumbnail of Batch versus column modes for the adsorption of radioactive metal onto rice husk waste: conditions optimization through response surface methodology

Water science and technology : a journal of the International Association on Water Pollution Research, 2017

Batch and column adsorption modes were compared for the adsorption of U(VI) ions using rice husk ... more Batch and column adsorption modes were compared for the adsorption of U(VI) ions using rice husk waste biomass (RHWB). Response surface methodology was employed for the optimization of process variables, i.e., (pH (A), adsorbent dose (B), initial ion concentration (C)) in batch mode. The B, C and C(2) affected the U(VI) adsorption significantly in batch mode. The developed quadratic model was found to be validated on the basis of regression coefficient as well as analysis of variance. The predicted and actual values were found to be correlated well, with negligible residual value, and B, C and C(2) were significant terms. The column study was performed considering bed height, flow rate and initial metal ion concentration, and adsorption efficiency was evaluated through breakthrough curves and bed depth service time and Thomas models. Adsorption was found to be dependent on bed height and initial U(VI) ion concentration, and flow rate decreased the adsorption capacity. Thomas models ...

Research paper thumbnail of Anticancer Activity of Natural Bioactive Compounds against Human Carcinoma Cell Lines - A mini review

Romanian Biotechnological Letters, 2019

Cancer is one of the most stern health dilemmas engulfing 7 million lives every year globally. It... more Cancer is one of the most stern health dilemmas engulfing 7 million lives every year globally. It is group of more than 100 diseases. Conventional cancer therapies burdened the disease crippled patient with lethal side effects and are also very expensive. Therefore, the demand to use alternative approaches in treatment of cancer is escalating. Plants of earth are massive reservoir of bioactive compounds. Plant derived compounds such as protoapigenone, casticin, moursin, gypenosides VN5, kalopanaxsaponin A, sapindoside B7, maclekarpine C are foremost anticancer agents, due to their unique structure and sophisticated mechanism of action. The present review is aimed at compiling data on promising classes of bioactive compounds from medicinal plants and their anti cancer mechanism of action against different human carcinoma cell lines.

Research paper thumbnail of Equilibrium, kinetic and thermodynamic studies on removal of Cd(II), Pb(II) AND As(V) from wastewater using carp (cyprinus carpio) scales

Research paper thumbnail of Biocomposite of sodium-alginate with acidified clay for wastewater treatment: Kinetic, equilibrium and thermodynamic studies

International Journal of Biological Macromolecules, 2020

Clay-based composites were prepared, characterized, and applied for the elimination of Blue FBN (... more Clay-based composites were prepared, characterized, and applied for the elimination of Blue FBN (BFBN) and Rose FRN (RFRN) dyes. The Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), Thermogravimetric (TGA) and X-ray diffraction analyses were performed to check the interaction of dye molecule with adsorbents. The analysis showed a successful interaction between adsorbent and dyes ions. The experimental data was best fitted with Freundlich isotherm for both dyes (BFBN and RFRN). The findings revealed that at 80 min the adsorption grasped equilibrium in the case of both dyes and succeeded the pseudo-second-order kinetics model. Furthermore, the enthalpy (ΔH°), Gibbs free energy (ΔG°) and entropy (ΔS°) changes suggested that adsorption was exothermic, physical and spontaneous in nature. The maximum adsorption capacities were determined as 76.39% for BFBN and 59.85% for RFRN dye at pH 2.0 and 30 °C. Composites found to be stable at higher temperature and regenerated using MgSO4 eluting agent. The textile effluent colour was removed up to 50.35 and 54.95% using raw and modified clay, respectively. The modified clay showed promising efficiency for adsorption of synthetic BFBN and RFRN dyes from aqueous solution, which could be a viable option for the treatment of industrial wastewater and textile effluents.