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:: Volume 3, Issue 4 (9-2016) ::
jehe 2016, 3(4): 337-349 Back to browse issues page
Performance Evaluation of Magnetic-Multiwalled Carbon Nanotube in Removal of 2,4-DNP from Aqueous Solutions and Determining Toxicity Reduction
Golnar Nourisepehr , Mozhgan Emtiazjoo * , Mohammad Nourisepehr , Emad Dehghanifard
Abstract:   (3655 Views)

Background and Objective: In Iran, due to vast development of different chemical and petrochemical industries and water resource pollution to refractory organic matters, using a costeffective method for the removal of those pollutant from drinking water. The aim of this study was to evaluate the performance of magnetic-multiwalled carbon nanotube for the removal of 2,4-
dinitrophenol from aquoeous solutions and deteremining toxicity reduction of the effluent.
Methods: Adsorption experiments were conducted in a batch system. Magnetic-multiwalled carbon nanotubes were synthesized by co-precipitation method. Variables of contact time (0-90 min), pH (3,5, 7, 9, 11), pollutant concentration (10-100 mg/L) and adsorbent concentration (1-2.5 g/L) were considered. For the determination of toxicity reduction of the effluent, the Bioassay tests were applied by using Daphnia magna which toxicity of 48h and 96 h were obtained.
Results: Results were showed that the maximum removal of 92.97% in the contact time of 90 min were obtained in pH=7, pollutant concentration of 10 mg/L and adsorption concentration of 2.5 g/L. The adsorption process was in accordance with Freundlich isotherm which showed non-uniform and multi-layered adsorption on the surface of the adsorbent and heterogeneous adsorption. The results of the toxicity of 2,4-DNP, before the adsorption process, on the Daphnia magna organism showed that the lethal concentration (LC50) 48h and 96 h of the raw wastewater was 42 and 38 percent (4.2 and
3.8 mg/L), respectively.
Conclusions: The magnetic-multiwalled carbon nanotube adsorbent could be a proper choice for removal of 2,4-DNP, due to high removal efficiency, recyclability, reusability and activity in neutral pH.

Keywords: Magnetic-multiwalled carbon nanotube, 2, 4-DNP, Toxicity reduction, Daphnia magna
Full-Text [PDF 484 kb]   (1277 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/01/8 | Accepted: 2017/01/8 | Published: 2017/01/8
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Nourisepehr G, Emtiazjoo M, Nourisepehr M, Dehghanifard E. Performance Evaluation of Magnetic-Multiwalled Carbon Nanotube in Removal of 2,4-DNP from Aqueous Solutions and Determining Toxicity Reduction. jehe 2016; 3 (4) :337-349
URL: http://jehe.abzums.ac.ir/article-1-274-en.html

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Volume 3, Issue 4 (9-2016) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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