Volume 4, Issue 2 (7-2014)                   JHSW 2014, 4(2): 1-14 | Back to browse issues page

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Golbabaei F, Rahmanzadeh E, Moussavi G R, Faghihi zarandi A, Baneshi M R. Fixed bed adsorption of hexavalent chromium onto natural zeolite from air stream. JHSW. 2014; 4 (2) :1-14
URL: http://jhsw.tums.ac.ir/article-1-5141-en.html
1- Professor, Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran
2- Associated professor, Department of Environmental Health Engineering, Faculty of medical sciences, Tarbiat Modares University, Tehran
3- MSc., Regional Knowledge Hub, and WHO Collaborating Centre for HIV Surveillance, Institute for Future Studies in Health, Kerman University of Medical Sciences, Kerman
4- Assistant professor, Research Center for Health Services Management, Institute for futures studies in health, Kerman University of Medical Sciences, Kerman , alifaghihi60@yahoo.com
5- Associated professor, Research Center for modeling in health, Institute for Futures Studies in Health, Kerman University of medical sciences, Kerman
Abstract:   (9077 Views)

Introduction: Chromium (VI) is a known human carcinogenic agent which is used in numerous industrial processes such as electroplating, welding, textile, cement and steel fabrication. The aim of this study was to determine the effectiveness of natural zeolite on the fixed bed adsorption of Cr (VI) from air stream.
Material and Method: In this experimental study, chromium mists were generated by a nebulizer (3A model, Italy). Performance of natural zeolite in the Cr (VI) adsorption and its influencing factors such as air flow rate (1 and 3 L/min), the initial Cr concentration (0.05, 0.15, 1 and 10 mg/m3) and the bed depth (2.5, 5 and 10 cm) were investigated.
Result: Zeolite adsorption capacity elevated by the increasing of bed depth but decreased with increasing of flow rate and inlet concentration. In order to facilitate the prediction of natural zeolite column performance Yoon-Nelson and Thomas models were used. The results showed that these models have a good agreement with our experimental data.
Conclusion: Due to the extensive use of chromium in various industries and regulatory requirements related to workplace health and safety, Cr emission control in the occupational environment is essential. The adsorption process is one of the controlling measures of chromium emissions. The results indicated that natural zeolite has a high efficiency in Cr (VI) adsorption.

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Type of Study: Research | Subject: Special
Received: 2014/06/30 | Accepted: 2014/06/30 | Published: 2014/06/30

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