Arsenic removal from water by Carbon Nanotubes

Arsenic, which is found in several different chemical forms and oxidation states, causes acute and chronic adverse health effects, including cancer. The metabolism of arsenic has an important role inits toxicity. Carbon nanotubes (CNTs) have drawn special research attention because of their uniqueproperties and potential applications as a kind of adsorbents. CNTs provide a large specific surfacearea and a strong van der Waals binding energy for molecular adsorbates on well defined adsorptionsites such as inside, interstitial channels, external grooves, and outside surfaces.This study wasaimed to investigate the adsorption mechanism of the arsenic removal from water by using carbonnanotubes in continuous adsorption column and Kinetic data for As(III) and As(V) adsorption bycarbon nanotube–zirconia nanohybrid (MWCNT–ZrO2). The effect of carbon nanotubes masses onarsenic removal SEM images of carboxylated MWCNT and the MWCNT–ZrO2 composite werealso shown. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlichmodels.

Keywords:

Aesenic , carbon nanotubes(CNTs) , multi-walled carbon nanotubes (MWNTs) , chemical vapor deposition (CVD) , Adsorption