Responses of green algae and diatom upon exposure to chromium and cadmium

Authors

  • Minh-Tan Vo University of Technology, Vietnam National University, Ho Chi Minh city
  • Van-Tai Nguyen University of Technology, Vietnam National University, Ho Chi Minh city
  • Thi-My-Chi Vo University of Technology, Vietnam National University, Ho Chi Minh city
  • Thi-Nhu-Phuong Bui Institute for Environment and Resources, Vietnam National University, Ho Chi Minh city
  • Thanh-Son Dao* University of Technology, Vietnam National University, Ho Chi Minh city

Keywords:

Cyclotella sp., Scenedesmus accuminatus var biseratus, Scenedesmus protuberans, trace metals

Abstract

In this study, the detrimental effects of trace metals on the growth of phytoplankton and the phytoremediation potential of microalgae from Vietnam are elucidated. Two green algae Scenedesmus accuminatus var biseratus and Scenedesmus protuberans, along with the diatom species Cyclotella sp., were exposed to chromium (Cr) and cadmium (Cd) at three distinct concentrations ranging from 5-761 µgl-1 and 18-667 µgl-1, respectively, over a period of 14 days. The results indicated that S. acuminatus var biseratus and Cyclotella sp. were relatively tolerant to Cr, even at the highest test concentration, while the growth rate of S. protuberans was significantly inhibited when exposed to 660 µgl-1 of Cr. Only Cyclotella sp. showed a high Cd tolerance, whereas Cd at concentrations of 493 and 607 µgl-1 prohibited the growth rate of S. acuminatus and S. protuberans, respectively. Moreover, at the concentrations tested, all three algal species could remove 90-100% of the Cr out of the test medium. The diatom Cyclotella sp. could reduce up to 99% of Cd whereas the two green algae could only do not remove more than 13% of Cd from the test medium. We strongly recommend the Cyclotella sp. as a candidate for phytoremediation in metal-contaminated water. Our results contribute vital information toward solutions that environmental experts and managers are searching for to resolve pollution caused by trace metal contaminants.

DOI:

https://doi.org/10.31276/VJSTE.62(1).69-73

Classification number

5.1

Downloads

Published

2022-03-29

Received 5 June 2019; accepted 22 October 2019

How to Cite

Minh-Tan Vo, Van-Tai Nguyen, Thi-My-Chi Vo, Thi-Nhu-Phuong Bui, & Thanh-Son Dao. (2022). Responses of green algae and diatom upon exposure to chromium and cadmium. Vietnam Journal of Science, Technology and Engineering, 62(1), 69-73. https://doi.org/10.31276/VJSTE.62(1).69-73

Issue

Section

Environmental Sciences