Dye adsorption and bactericidal properties of TiO2/chitosan coating layer

Tahseen Kamal; Yasir Anwar; Sher Bahadar Khan; Muhammad Tariq Saeed Chani; Abdullah M Asiri

doi:10.1016/j.carbpol.2016.04.042

Dye adsorption and bactericidal properties of TiO2/chitosan coating layer

Carbohydr Polym. 2016 Sep 5:148:153-60. doi: 10.1016/j.carbpol.2016.04.042. Epub 2016 Apr 11.

Authors

Tahseen Kamal¹, Yasir Anwar², Sher Bahadar Khan³, Muhammad Tariq Saeed Chani³, Abdullah M Asiri³

Affiliations

¹ Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia. Electronic address: tkkhan@kau.edu.sa.
² Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
³ Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.

PMID: 27185126
DOI: 10.1016/j.carbpol.2016.04.042

Abstract

A new kind of titanium oxide dispersed in chitosan (TiO2/CS) nanocomposite adsorbent was prepared and adhered to high surface area substrate, cellulose microfibers mat (CMM). CS-CMM and TiO2/CS-CMM were used for the thymol violet (TV) dye removal from wastewater. Characterization of materials was carried out by X-ray diffraction, scanning electron microscope and energy dispersive X-ray spectroscopy. The adsorption properties of both the CS-CMM and TiO2/CS-CMM were investigated as a function of adsorbent dosage, solution pH, and contact time. It was revealed that the composites pretreated in the solution with higher pH value exhibited larger adsorption capacities. Kinetic studies showed that the composites could adsorb TV dye rapidly and reached the equilibrium in 90min. The adsorption process followed pseudo-second order kinetics and involved particle diffusion mechanism. The calculated maximum adsorption capacities of CS-CMM and TiO2/CS-CMM were 84.32 and 97.51mgg(-1), respectively. Compare to CS, the TiO2/CS nanocomposite coated CMM showed higher antibacterial characteristics as tested against Escherichia coli.

Keywords: Adsorption; Chitosan; Coating layer; Nanocomposite; TiO(2).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Anti-Bacterial Agents / pharmacology*
Chitosan / chemistry
Chitosan / metabolism
Chitosan / pharmacology*
Coloring Agents / metabolism*
Escherichia coli / drug effects*
Hydrogen-Ion Concentration
Kinetics
Nanocomposites / chemistry*
Titanium / chemistry
Titanium / metabolism
Titanium / pharmacology*

Substances

Anti-Bacterial Agents
Coloring Agents
titanium dioxide
Chitosan
Titanium