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Cadmium Removal by Two Strains of Desmodesmus pleiomorphus Cells

Monteiro, Cristina ; Castro, Paula ; Malcata, F.

Water, Air, and Soil Pollution, 2010, Vol.208(1), pp.17-27 [Tạp chí có phản biện]

ISSN: 0049-6979 ; E-ISSN: 1573-2932 ; DOI: 10.1007/s11270-009-0146-1

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  • Nhan đề:
    Cadmium Removal by Two Strains of Desmodesmus pleiomorphus Cells
  • Tác giả: Monteiro, Cristina ; Castro, Paula ; Malcata, F.
  • Chủ đề: Microalgae ; Heavy metals ; Biosorption ; pH ; Inactive biomass
  • Là 1 phần của: Water, Air, and Soil Pollution, 2010, Vol.208(1), pp.17-27
  • Mô tả: The capacity of microalgae to accumulate heavy metals has been widely investigated for its potential applications in wastewater (bio)treatment. In this study, the ability of Desmodesmus pleiomorphus (strain L), a wild strain isolated from a polluted environment, to remove Cd from aqueous solutions was studied, by exposing its biomass to several Cd concentrations. Removal from solution reached a maximum of 61.2 mg Cd g −1 biomass by 1 day, at the highest initial supernatant concentration used (i.e., 5.0 mg Cd L −1 ), with most metal being adsorbed onto the cell surface. Metal removal by D. pleiomorphus (strain ACOI 561), a commercially available ecotype, was also assessed for comparative purposes; a removal of 76.4 mg Cd g −1 biomass was attained by 1 day for the same initial metal concentration. Assays for metal removal using thermally inactivated cells were also performed; the maximum removal extent observed was 47.1 mg Cd g −1 biomass, at the initial concentration of 5 mg Cd L −1 . In experiments conducted at various pH values, the highest removal was achieved at pH 4.0. Both microalga strains proved their feasibility as biotechnological tools to remove Cd from aqueous solution.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0049-6979 ; E-ISSN: 1573-2932 ; DOI: 10.1007/s11270-009-0146-1

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