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4 results on '"S., Swetha"'

1. Mixed biosorbent of agro waste and bacterial biomass for the separation of Pb(II) ions from water system

Author

S. Karishma, P.R. Yaashikaa, S. Swetha, Anbalagan Saravanan, P. Senthil Kumar, and S. Jeevanantham

Subjects
Environmental Engineering, Health, Toxicology and Mutagenesis, 0208 environmental biotechnology, Kinetics, Biomass, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, symbols.namesake, Adsorption, Environmental Chemistry, Fourier transform infrared spectroscopy, Rhodobacteraceae, 0105 earth and related environmental sciences, Ions, Aqueous solution, Chemistry, Public Health, Environmental and Occupational Health, Chemical modification, Langmuir adsorption model, Water, Sorption, General Medicine, General Chemistry, Hydrogen-Ion Concentration, Pollution, 020801 environmental engineering, Lead, symbols, Thermodynamics, Water Pollutants, Chemical, Nuclear chemistry
Abstract

Adsorption of Pb(II) ions in aqueous systems by newly developed mixed biomass has been explored. Mixed biomass was prepared from agro-waste (raw Banyan tree bark, RBTB) and bacterial biomass (Pannonibacter phragmitetus). Chemical modification by sulphuric acid treatment of raw banyan tree bark (SMBTB) was accomplished for the effective separation of toxic Pb(II) ions from the aquatic system. FTIR, SEM and EDX analysis was utilized to deduce sorption characteristics of mixed biomass. Pb(II) ions maximal removal has occurred at pH-6.0, lead (II) ions concentration-25 mg/L, time and mixed biomass dosage (60 min and 3.5 g/L for RBTB – Pannonibacter phragmitetus; 30 min and 1.5 g/L for SMBTB – Pannonibacter phragmitetus) and temperature (30 °C). Data from equilibrium isotherm and kinetic analysis was best suited to the Langmuir model and pseudo-first-order kinetics. The spontaneous and exothermic nature of Pb(II) ions removal was described by thermodynamic parameters. The mixed biomass proved to be an effective and potential mixed biosorbent for toxic lead removal from solutions.

Published
2020

2. Ultrasonic assisted agro waste biomass for rapid removal of Cd(II) ions from aquatic environment: Mechanism and modelling analysis

Author

Anbalagan Saravanan, S. Karishma, P.R. Yaashikaa, S. Jeevanantham, Dai-Viet N. Vo, P. Tsopbou Ngueagni, P. Senthil Kumar, and S. Swetha

Subjects
Environmental Engineering, Exothermic process, Health, Toxicology and Mutagenesis, 0208 environmental biotechnology, Kinetics, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, symbols.namesake, Adsorption, Monolayer, Water environment, Environmental Chemistry, Ultrasonics, Biomass, Fourier transform infrared spectroscopy, 0105 earth and related environmental sciences, Ions, Chemistry, Public Health, Environmental and Occupational Health, Langmuir adsorption model, General Medicine, General Chemistry, Hydrogen-Ion Concentration, Pollution, 020801 environmental engineering, Wastewater, symbols, Thermodynamics, Water Pollutants, Chemical, Nuclear chemistry, Cadmium
Abstract

In this research, dragon fruit peel, an agro-waste was used to prepare the new adsorbent for the removal of Cd(II) ions from the aquatic environment. The characterization techniques of SEM, FTIR and EDX for the prepared materials have been studied. The influential parameters for Cd(II) ions were experimented and identified the probable conditions for the maximum adsorption of Cd(II) ions. The investigations on isotherms, kinetics, and thermodynamics for Cd(II) ions removal were examined. Adsorption isotherm data was well discussed with Langmuir model based on the obtained good correlation coefficient and error values. Moreover, it follows the pseudo-first-order and exothermic process. The values of monolayer adsorption capacity of surface-modified dragon fruit peel (SMDFP) and ultrasonic-assisted dragon fruit peel (UADFP) was determined to be 7.469 and 24.76 mg/g at an equilibrium condition, respectively. This study exposed that ultrasonic-assisted dragon fruit peel can be a suitable adsorbent for Cd(II) ions removal from the water environment.

Published
2020

3. Mixed biosorbent of agro waste and bacterial biomass for the separation of Pb(II) ions from water system.

Author

Saravanan A, Kumar PS, Yaashikaa PR, Karishma S, Jeevanantham S, and Swetha S

Subjects
Adsorption, Biomass, Hydrogen-Ion Concentration, Ions, Kinetics, Lead, Rhodobacteraceae, Thermodynamics, Water, Water Pollutants, Chemical analysis
Abstract

Adsorption of Pb(II) ions in aqueous systems by newly developed mixed biomass has been explored. Mixed biomass was prepared from agro-waste (raw Banyan tree bark, RBTB) and bacterial biomass (Pannonibacter phragmitetus). Chemical modification by sulphuric acid treatment of raw banyan tree bark (SMBTB) was accomplished for the effective separation of toxic Pb(II) ions from the aquatic system. FTIR, SEM and EDX analysis was utilized to deduce sorption characteristics of mixed biomass. Pb(II) ions maximal removal has occurred at pH-6.0, lead (II) ions concentration-25 mg/L, time and mixed biomass dosage (60 min and 3.5 g/L for RBTB - Pannonibacter phragmitetus; 30 min and 1.5 g/L for SMBTB - Pannonibacter phragmitetus) and temperature (30 °C). Data from equilibrium isotherm and kinetic analysis was best suited to the Langmuir model and pseudo-first-order kinetics. The spontaneous and exothermic nature of Pb(II) ions removal was described by thermodynamic parameters. The mixed biomass proved to be an effective and potential mixed biosorbent for toxic lead removal from solutions., (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Published
2021
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4. Ultrasonic assisted agro waste biomass for rapid removal of Cd(II) ions from aquatic environment: Mechanism and modelling analysis.

Author

Saravanan A, Kumar PS, Vo DN, Swetha S, Ngueagni PT, Karishma S, Jeevanantham S, and Yaashikaa PR

Subjects
Adsorption, Biomass, Hydrogen-Ion Concentration, Ions, Kinetics, Thermodynamics, Ultrasonics, Cadmium analysis, Water Pollutants, Chemical analysis
Abstract

In this research, dragon fruit peel, an agro-waste was used to prepare the new adsorbent for the removal of Cd(II) ions from the aquatic environment. The characterization techniques of SEM, FTIR and EDX for the prepared materials have been studied. The influential parameters for Cd(II) ions were experimented and identified the probable conditions for the maximum adsorption of Cd(II) ions. The investigations on isotherms, kinetics, and thermodynamics for Cd(II) ions removal were examined. Adsorption isotherm data was well discussed with Langmuir model based on the obtained good correlation coefficient and error values. Moreover, it follows the pseudo-first-order and exothermic process. The values of monolayer adsorption capacity of surface-modified dragon fruit peel (SMDFP) and ultrasonic-assisted dragon fruit peel (UADFP) was determined to be 7.469 and 24.76 mg/g at an equilibrium condition, respectively. This study exposed that ultrasonic-assisted dragon fruit peel can be a suitable adsorbent for Cd(II) ions removal from the water environment., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Published
2021
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