Adsorption of arsenic (III) on multiwall carbon nanotube

Abstract

In this study, adsorption characteristics of arsenic on commercially produced multiwall carbon nanotube (MWCNT) have been assessed in laboratory experiments. Batch adsorption tests were carried out under different conditions (e.g. varying dispersion time, varying amount of materials) in order to evaluate the suitability of Multiwall Carbon nanotube particles for Arsenite or As(III) removal. Tests were conducted using batch adsorption technique or mixing method. It was found that during the experiment pH was within 7.1-7.3 range. Firstly the dispersion time was varied using MWCNT and it was observed that percentage adsorption was increased with dispersion time. Maximum adsorption was found about 38.37% for 120 minutes dispersion. Secondly the amount of materials (MWCNT) was varied using 542 ppb As(III) contaminated water. Maximum adsorption for MWCNT was about 34.22% using 1g/l concentration. The result reveals that MWCNT can remove arsenic to safe limit for the lower level of arsenic contaminated water.