Volume 4, Issue 2 (July-Sep 2015)                   JCHR 2015, 4(2): 114-127 | Back to browse issues page

XML Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Molazadeh P, Khanjani N, Rahimi M R, Nasiri A. Adsorption of Lead by Microalgae Chaetoceros Sp. and Chlorella Sp. from Aqueous Solution . JCHR 2015; 4 (2) :114-127
URL: http://jhr.ssu.ac.ir/article-1-248-en.html
1- Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran , nasiri_a62@yahoo.com
Abstract:   (7917 Views)
Introduction: Using bio-sorbents is regarded as one of the effective methods to remove heavy metals. Therefore, this study aimed to investigate Pb adsorption from contaminated water by Chaetoceros sp. and Chlorella sp. algae. Methods: This experimental study was conducted in a batch reactor. The amount of Pb adsorption by Chaetoceros sp. and Chlorella sp. algae was studied under such conditions as different adsorbent dosages (0.2, 0.5, 1.5 and 2 g/L), different pH (3, 4, 5, 6, 7, 8), different temperatures (20, 25, 30, 35, 40 °C), different contact times (30, 60, 90, 180, 360 minutes), different particle sizes (20, 40, 60, 100, 140 mesh) and different Pb concentrations(20, 40, 60 mg/L). Then adsorption isotherms and kinetic models of metal ions were determined based on Langmuir and Freundlich isotherms as well as first and second order kinetic models. Results: The efficiency of Pb removal by Chlorella sp. and Chaetoceros sp. algae was reported 78% and 60% respectively. The maximum adsorption was observed at optimal conditions including 25 °C, pH of 6, 180 minutes of contact time, particle size of 20 mesh, 1.5 gr/L of adsorbent and 20 mg/L concentration of Pb. Chlorella algae was observed to remove Pb more than Chaetoceros algae. Based on the study results, Pb absorption by Chlorella algae complies with Langmuir adsorption isotherm model, whereas Chaetoceros algae follows Freundlich model. The kinetic models of algae adsorption followed a second order equation. Conclusion: The study findings revealed that Chlorella algae can be effectively used in order to adsorb Pd from contaminated water due to its high efficiency of Pd adsorption.
Full-Text [PDF 763 kb]   (4028 Downloads)    
Review: Research | Subject: Environmental Health
Received: 2015/07/17 | Accepted: 2015/08/30 | Published: 2015/09/13

Add your comments about this article : Your username or Email:

Send email to the article author

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 International License.

© 2024 CC BY 4.0 | Journal of Community Health Research

Designed & Developed by : Yektaweb