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:: Volume 1, Issue 1 (12-2013) ::
jehe 2013, 1(1): 11-19 Back to browse issues page
Comparision of Chitosan Function as Adsorbent for Nitrate Removal Using Synthetic Aqueous Solution and Drinking Water
Mohammad Norisepehr , Somayeh Golbaz, Sahand Jarghi
Abstract:   (3169 Views)

Background & Objectives: Nitrate and nitrite compounds pollution of groundwater resources in recent years which recently their mean concentration due to enhancement of different kind of municipal, industrial and agriculture waste water, were increased. The most common source of nitrates entering the water include chemical fertilizers and animal manure in agriculture, septic tank effluent, wastewater, wastewater treatment plants, animal and plant residue analysis on the ground of non-sanitary disposal of solid waste and the use of absorbing wells for sewage disposal.

Materials and methods: This experimental study is applied to the nitrate removal using chitosan in laboratory scale at ambient temperature and the design of the system was Batch. Effects of parameters such as pH, contact time, initial concentration and adsorbent concentration of nitrate on nitrate removal from aqueous solution was studied.

Results: Function of chitosan in synthetic aqueous solution and drinking water according to the slurry system results, the optimum condition was obtained at pH=4, 20 min contact time and increasing the initial concentration of nitrate enhance the adsorption capacity of chitosan. Also optimum dosage of adsorbent was obtained at 0.5 g/l. The data obtained from the experiments of adsorbent isotherm were analyzed using Langmuir and Freundlich isotherm models. The Langmuir equation was found to be the best fitness with the experimental data (R2>0.93).

Conclusion: Although efficiency of Nitrate removal in synthetic aqueous solution was better than drinking water, adsorption process using chitosan as an option for the design and selection nitrate removal should be considered in order to achieve environmental standards.

Keywords: Chitosan, Nitrate, Adsorbtion, Isotherm, Drinking water
Full-Text [PDF 385 kb]   (2353 Downloads)    
Type of Study: Research | Subject: General
Received: 2015/01/14 | Accepted: 2015/01/14 | Published: 2015/01/14
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Norisepehr M, Golbaz S, Jarghi S. Comparision of Chitosan Function as Adsorbent for Nitrate Removal Using Synthetic Aqueous Solution and Drinking Water . jehe. 2013; 1 (1) :11-19
URL: http://jehe.abzums.ac.ir/article-1-24-en.html

Volume 1, Issue 1 (12-2013) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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