Volume 9, Issue 2 (2018)                   JMBS 2018, 9(2): 241-246 | Back to browse issues page

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Sayadi M, Shekari H. Efficiency of Spirogyra at Bioadsorption of Heavy Metals such as Chromium, Copper, and Zinc from Aquatic Environments. JMBS 2018; 9 (2) :241-246
URL: http://biot.modares.ac.ir/article-22-14325-en.html
1- Environment Department, Natural Resources & Environment Faculty, University of Birjand, Birjand, Iran, Natural Resources & Environment Faculty, University of Birjand, Amirabad Pardis, 5 Kilometers Kerman Road, Birjand, South Khorasan. Postal code: 9719113944 , mh_sayadi@birjand.ac.ir
2- Environment Department, Natural Resources & Environment Faculty, University of Birjand, Birjand, Iran
Abstract:   (4641 Views)
Aims: Heavy metal pollution is a worrisome environmental problem around the world. This study aimed at evaluating the efficiency of spirogyra to remove heavy metals such as chromium (Cr), copper (Cu), and zinc (Zn) from the aquatic environments.
Materials and Methods: The present experimental research was carried out on spirogyra of aqueducts in Birjand. The experimental method was considered one-factor-at-a-time. Effect of pH parameters, adsorbent dosage, contact time, initial concentration of Cr, Cu, and Zn at adsorption of heavy metals by spirogyra and Kinetic models, and Langmuir adsorption isotherms, Freundlich, and Temkin were examined.
Findings: The highest percentage of Cr (84.48%) and Cu (76.85%) removal occurred at pH 3 and 5, respectively with initial concentration of 20mg/l Cr and Cu at 15 and 40 minutes, respectively, in 3g algae biomass. Also, the highest Zn removal efficiency (89.26%) occurred at pH=5, initial concentration of 20mg/l, and adsorbent dosage of 2g/l over a 20 minutes period. Adsorption of Cr, Cu, and Zn were followed by Langmuir model with correlation coefficient 0.9983, 0.9924, and 0.9977, respectively. According to the kinetics results, the adsorption of Cr, Cu, and Zn were followed by pseudo second model with coefficients of 0.9922, 0.9767, and 0.9953, respectively.
Conclusion: Spirogyra has a high ability to remove chromium, copper, and zinc from aquatic environments.
Keywords: Chromium, Copper, Zinc, Kinetics
Full-Text [PDF 507 kb]   (2013 Downloads)    
Article Type: Research Paper | Subject: Agricultural Biotechnology
Received: 2017/02/5 | Accepted: 2017/07/4 | Published: 2018/06/21

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