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Heavy metal control in microalgae cultivation with power plant flue gas entering into raceway pond.

Authors
  • Sun, Jing1, 2
  • Cheng, Jun3
  • Yang, Zongbo2
  • Zhou, Junhu2
  • 1 Ningbo University of Finance & Economics, Ningbo, People's Republic of China. , (China)
  • 2 Zhejiang University, Hangzhou, People's Republic of China. , (China)
  • 3 Zhejiang University, Hangzhou, People's Republic of China. [email protected] , (China)
Type
Published Article
Journal
Environmental Science and Pollution Research
Publisher
Springer-Verlag
Publication Date
Oct 01, 2020
Volume
27
Issue
30
Pages
37357–37362
Identifiers
DOI: 10.1007/s11356-020-08220-6
PMID: 32144702
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The heavy metal sources of large-scale raceway pond microalgae cultivation with flue gas were investigated to reduce heavy metal contents in microalgae during cultivation. The microalgae were cultivated with power plant flue gas (as C source) and circulating cooling seawater (added with N and P nutrients) for 6 days. The Pb, Cd, Hg, and As contents in microalgae were 0.91, 0.22, 0.08, and 0.28 ppm, respectively, which are nearly within the available national standard for food-grade microalgae. The heavy metal contents in microalgae with two membrane materials, namely, elastic polyethylene and random copolymer polypropylene, barely increased. The Hg, As, and Pb contents in microalgae cells cultivated with pure CO2 were 16.67%, 69.23%, and 70.33% that of cells cultivated with CO2 from flue gas. The Pb, As, and Hg contents in cells cultivated with fresh water were reduced by 38.46%, 15.38%, and 37.50%, respectively, compared with those cultivated with seawater. The heavy metal contents in microalgae were further reduced and controlled.

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