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:: Volume 6, Issue 1 (12-2018) ::
jehe 2018, 6(1): 27-41 Back to browse issues page
Optimization the Removal of Nickel from Simulated Wastewater by A Pseudomonas aeruginosa Biofilm Supported on Clinoptilolite
Roghayeh Sadat Salehnezhad , Mitra Ataabadi
Department of Soil Sciences, Faculty of Agriculture & Natural Resources and Waste and Wastewater Research Center, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
Abstract:   (83 Views)
Background & Objectives: Nickel toxicity and its bioaccumulation potential in organisms at high
concentrations, the use of cost-effective and environmental friendly remediation methods is necessary
for the removal of nickel from polluted water and wastewaters. Bacterial biofilm be able to remove
heavy metals from aqueous solutions and accumulate them in their cell structure. Therefore, the
purpose of this study was to evaluate the nickel removal efficiency by biofilms of Pseudomonas aeruginosa
supported on clinoptilolite.
Methods: In this study, a strain of Pseudomonas aeruginosa as a biofilm coating supported on
clinoptilolite. To ensure the establishment of biofilms, scanning electron microscopy was used. The
effect of concentration, pH, support medium dosage, temperature and contact time were evaluated in
5 levels, and finally, the results were assessed by adsorption isotherm models.
Results: The findings indicated that the maximum removal efficiency by biofilms of Pseudomonas
aeruginosa supported on clinoptilolite (99/47%) was achieved in optimal condition containing 900 mg.
L-1of nickel concentration, pH of 9, supporting medium dosage (clinoptilolite) 2.36 g. L-1, temperature
of 25 ° C and the contact time of 45 days. The fitness of data in Freundlich adsorption isotherm
model revealed that the heterogeneity of adsorbent surface.
Conclusion: This study indicates that the use of biofilm coating on the surface of clinoptilolite, can
be a good candidate to remove the nickel from the aqueous media.
Keywords: Nickel, Clinoptilolite, Biofilm, Pseudomonas aeruginosa
Full-Text [PDF 475 kb]   (33 Downloads)    
Type of Study: Research | Subject: Special
Received: 2018/12/30 | Accepted: 2018/12/30 | Published: 2018/12/30
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Salehnezhad R S, Ataabadi M. Optimization the Removal of Nickel from Simulated Wastewater by A Pseudomonas aeruginosa Biofilm Supported on Clinoptilolite. jehe. 2018; 6 (1) :27-41
URL: http://jehe.abzums.ac.ir/article-1-576-en.html


Volume 6, Issue 1 (12-2018) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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