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Barikbin B, Alikhanian A. Investigation of hexavalent chromium removal by functionalized carbon derived from rice husk from aqueous solution. J Birjand Univ Med Sci.. 2017; 24

1- Associate Professor Social Determinants of Health Research Center, Birjand University of Medical Sciences, Birjand, Iran. ,
2- Environmental Health Engineering master student Member of the Student Research Committee, Birjand University of Medical Sciences, Birjand, Iran.
Abstract:   (983 Views)
Background and Aim: Hexavalent chromium is a metal, which causes harmful effects in human and environment, Its removal from contaminated water and waste water has received a great deal of interest in recent years. Thus, the aim of the present study was a comparative analysis of the evaluate the absorption of hexavalent chromium in aquatic environments using functionalized carbon produced from rice husk as an bioabsorbent.
Materials and Methods: In this experimental study, the effects of variables such as pH (2-10) of adsorbent dose (5-20 g/l), initial chromium concentration (5-20 mg/l), contact time (5-60 min), temperature (1-40c0), and its resultant on removing of chromium from aqueous solutions with functionalized carbon derived from rice husk were investigated. Experiments were intermittently performed in batch reactor on Shaker. The result of adsorption was analyzed to Langmuir isotherm model. Finally, samples were analysed by colorimetric method using UV/Vis Spectrophotometer T80+, at a wavelength of 540nm.
Results: The most efficient removal of hexavalent chromium occurred when pH was 2 and optimal dose 10 g/l respectively. Also the initial concentration of hexavalent chromium from 5 to 20 mg/lit led to the removal percentage from 97.3 to 85.7%, respectively. furthermore results showed that with increasing contact time and mixing, removal efficiency increased.
Conclusion: functionalized carbon derived from rice husk with a maximum efficiency of 97% is very effective methods for the removal of hexavalent chromium from aqueous solutions.
Full-Text [PDF 391 kb]   (101 Downloads)    
Type of Study: Short Communication | Subject: Environmental Health
Received: 2017/01/6 | Accepted: 2017/02/6 | Published: 2017/05/24

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