Investigation of mechanism and critical parameters for removal of arsenic from water using Zr-TiO2 composite
Amaizah, Naser Ramdan R.
Marković, Smilja B.
Article (Published version)
MetadataShow full item record
Using the microwave-hydrothermal method for the synthesis of composite, high surface density of hydroxyl groups, as an active adsorption sites for arsenic, was obtained. Adsorption mechanisms of As(III) and As(V) onto zirconium-doped titanium dioxide (Zr-TiO2) were investigated and proposed using macroscopic and microscopic methods. Obtained results are suggesting inner-sphere and outer-sphere adsorption mechanisms for As(III) and As(V), respectively. This allowed us to identify parameters that are critical for the successful removal of arsenic from water, which is essential information for further optimization of the removal process. The composite was further applied for the removal of As(III) and As(V) from water in a dynamic flow through the reactor. Column study proved that the removal of both arsenic species below the value recommended by WHO can be achieved. Elution of As(III) and As(V) from the composite can be done by using small amounts of 0.01M NaOH solution resulting in prec...oncentration of arsenic species and possible multiple usage of composite.
Keywords:Microwave-hydrothermal synthesis / As(III) / As(V) / adsorption / mechanism
Source:Environmental Technology, 2017, 38, 17, 2233-2240
- Taylor & Francis Ltd, Abingdon
- Application of advanced oxidation processes and nanostructured oxide materials for the removal of pollutants from the environment, development and optimisation of instrumental techniques for efficiency monitoring (RS-172030)
- The peer-reviewed version: http://cer.ihtm.bg.ac.rs/handle/123456789/2671