Tags

Type your tag names separated by a space and hit enter

Biosorption of zinc and copper from aqueous solutions by two freshwater green microalgae Chlorella pyrenoidosa and Scenedesmus obliquus.
Environ Sci Pollut Res Int. 2011 Aug; 19(7):2918-29.ES

Abstract

PURPOSE

The objective of this study was to determine the removal of zinc and copper by two freshwater green microalgae Chlorella pyrenoidosa and Scenedesmus obliquus and to investigate changes of algal ultrastructure and photosynthetic pigment.

METHODS

Algal cells were exposed for 8 days to different initial zinc or copper concentrations. Heavy metal concentrations were detected by an atomic absorption spectrophotometer. Algal growth, ultrastructure, and photosynthetic pigment were analyzed by a microplate reader, transmission electron microscope, and spectrophotometer, respectively.

RESULTS

Low zinc and copper concentrations induced increase in algal growth, whereas application of high zinc and copper concentrations suppressed the growth of both algae. High metal concentrations also decreased the photosynthetic pigments and destroyed algal cell ultrastructure. The zinc removal efficiency by both algae increased rapidly during the first day and thereafter remained nearly constant throughout the experiment. The copper removal efficiency by both algae increased slowly during the whole experimental periods. In all cultures, the quantity of both metals removed intracellularly was much lower than the adsorbed quantity on the cell surface.

CONCLUSIONS

Both strains of the microalgae had proven effective in removing zinc and copper from aqueous solutions, with the highest removal efficiency being near 100%. In addition, C. pyrenoidosa appeared to be more efficient than S. obliquus for removing copper ions. On the contrary, S. obliquus appeared to be more efficient than C. pyrenoidosa for removing zinc ions.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Zhou GJ
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China.
Peng FQ
No affiliation info available
Zhang LJ
No affiliation info available
Ying GG
No affiliation info available

MeSH

Biodegradation, EnvironmentalChlorellaCopperDose-Response Relationship, DrugMetalsScenedesmusTime FactorsWaterWater Pollutants, ChemicalZinc

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22327643

Citation

Zhou, Guang-Jie, et al. "Biosorption of Zinc and Copper From Aqueous Solutions By Two Freshwater Green Microalgae Chlorella Pyrenoidosa and Scenedesmus Obliquus." Environmental Science and Pollution Research International, vol. 19, no. 7, 2011, pp. 2918-29.
Zhou GJ, Peng FQ, Zhang LJ, et al. Biosorption of zinc and copper from aqueous solutions by two freshwater green microalgae Chlorella pyrenoidosa and Scenedesmus obliquus. Environ Sci Pollut Res Int. 2011;19(7):2918-29.
Zhou, G. J., Peng, F. Q., Zhang, L. J., & Ying, G. G. (2011). Biosorption of zinc and copper from aqueous solutions by two freshwater green microalgae Chlorella pyrenoidosa and Scenedesmus obliquus. Environmental Science and Pollution Research International, 19(7), 2918-29. https://doi.org/10.1007/s11356-012-0800-9
Zhou GJ, et al. Biosorption of Zinc and Copper From Aqueous Solutions By Two Freshwater Green Microalgae Chlorella Pyrenoidosa and Scenedesmus Obliquus. Environ Sci Pollut Res Int. 2011;19(7):2918-29. PubMed PMID: 22327643.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Biosorption of zinc and copper from aqueous solutions by two freshwater green microalgae Chlorella pyrenoidosa and Scenedesmus obliquus. AU - Zhou,Guang-Jie, AU - Peng,Fu-Qiang, AU - Zhang,Li-Juan, AU - Ying,Guang-Guo, Y1 - 2012/02/12/ PY - 2011/12/14/received PY - 2012/01/27/accepted PY - 2012/2/14/entrez PY - 2012/2/14/pubmed PY - 2012/10/18/medline SP - 2918 EP - 29 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 19 IS - 7 N2 - PURPOSE: The objective of this study was to determine the removal of zinc and copper by two freshwater green microalgae Chlorella pyrenoidosa and Scenedesmus obliquus and to investigate changes of algal ultrastructure and photosynthetic pigment. METHODS: Algal cells were exposed for 8 days to different initial zinc or copper concentrations. Heavy metal concentrations were detected by an atomic absorption spectrophotometer. Algal growth, ultrastructure, and photosynthetic pigment were analyzed by a microplate reader, transmission electron microscope, and spectrophotometer, respectively. RESULTS: Low zinc and copper concentrations induced increase in algal growth, whereas application of high zinc and copper concentrations suppressed the growth of both algae. High metal concentrations also decreased the photosynthetic pigments and destroyed algal cell ultrastructure. The zinc removal efficiency by both algae increased rapidly during the first day and thereafter remained nearly constant throughout the experiment. The copper removal efficiency by both algae increased slowly during the whole experimental periods. In all cultures, the quantity of both metals removed intracellularly was much lower than the adsorbed quantity on the cell surface. CONCLUSIONS: Both strains of the microalgae had proven effective in removing zinc and copper from aqueous solutions, with the highest removal efficiency being near 100%. In addition, C. pyrenoidosa appeared to be more efficient than S. obliquus for removing copper ions. On the contrary, S. obliquus appeared to be more efficient than C. pyrenoidosa for removing zinc ions. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/22327643/Biosorption_of_zinc_and_copper_from_aqueous_solutions_by_two_freshwater_green_microalgae_Chlorella_pyrenoidosa_and_Scenedesmus_obliquus_ L2 - https://dx.doi.org/10.1007/s11356-012-0800-9 DB - PRIME DP - Unbound Medicine ER -