Volume No. 8 Issue No.: 3A Page No.: 594-599 Jan-Mar 2014

 

STUDIES ON THE USE OF NOVEL NANO COMPOSITE (CNT/Chitosan/Fe(O)) TOWARDS ARSENATE REMOVAL

 

Sankararamakrishnan Nalini* and Chauhan Divya

Centre for Environmental Science and Engineering, Indian Institute of Technology, Kanpur, Kanpur, Uttar Pradesh (INDIA)

 

Received on : October 10, 2013

 

ABSTRACT

 

In India, arsenic contamination of groundwater used for drinking is well documented. WHO provisional guideline value as well as Bureau of Indian Standard for arsenic in drinking water is 10 ?g l-1. This study pertains to the development novel composite (CFCNT) consisting of chitosan, Fe(0) and CNTs and evaluating its ability towards arsenate removal. Arsenate adsorption was found to be quantitative over the wide range of pH from 3 -8. Using a dose rate 0.5 g within 3 h arsenate concentration was reduced from 500 ppb to < 1.0 ppb was achieved. The equilibrium data obtained was modeled by Langmuir isotherm models. Langmuir adsorption capacity of 13.5 mg/g was obtained at pH 7 and the reaction followed pseudo second order kinetics. Thus, CFCNT is effective adsorbent for arsenate removal over the wide range of pH and could be used for arsenic remediation in arsenic contaminated ground water streams.

 

Keywords : CNT, Arsenate, Contamination, Fe(O), Chitosan

 

 

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