Izvorni znanstveni članak

https://doi.org/10.5599/jese.2014.0067

Use of hydrous titanium dioxide as potential sorbent for the removal of manganese from water

Ramakrishnan Kamaraj ; CSIR-Central Electrochemical Research Institute, Karaikudi - 630 006, India
Pandian Ganesan ; CSIR-Central Electrochemical Research Institute, Karaikudi - 630 006, India
Subramanyan Vasudevan ; CSIR-Central Electrochemical Research Institute, Karaikudi - 630 006, India

Sažetak

This research article deals with an electrosynthesis of hydrous titanium dioxide by anodic dissolution of titanium sacrificial anodes and their application for the adsorption of manganese from aqueous solution. Titanium sheet was used as the sacrificial anode and galvanized iron sheet was used as the cathode. The optimization of different experimental parameters like initial ion concentration, current density, pH, temperature, etc., on the removal efficiency of manganese was carried out. The maximum removal efficiency of 97.55 % was achieved at a current density of 0.08 A dm-2 and pH of 7.0. The Langmuir, Freundlich and Redlich Peterson isotherm models were applied to describe the equilibrium isotherms and the isotherm constants were determined. The adsorption of manganese preferably followed the Langmuir adsorption isotherm. The adsorption kinetics was modelled by first- and second- order rate models and the adsorption kinetic studies showed that the adsorption of manganese was best described using the second-order kinetic model. Thermodynamic parameters indicate that the adsorption of manganese on hydrous titanium dioxide was feasible, spontaneous and exothermic.

Ključne riječi

Titanium dioxide; manganese; adsorption; thermodynamics; isotherm; kinetics

Hrčak ID:

130219

URI

https://hrcak.srce.hr/130219

Datum izdavanja:

6.12.2014.

Posjeta: 1.875 *