|
Studying the effect of different concentrations of copper and lead on chlorophyll a and density of microalgae Chaetocero muelleri with emphasis on fat and protein
|
Zahra Firoozi   , Mohammad Reza Taherizadeh * , Sohila Ebrahimi , Zohreh Barkhordari Ahmady |
| Department of Marine Biology, Faculty of Marine Sciences and Technology, University of Hormozgan, Bandar Abbas, Iran , taheri.1965@gmail.com |
|
|
Abstract: (22 Views) |
Background and Aim: Today, one of the most significant global environmental issues, particularly in aquatic ecosystems, is pollution caused by heavy metals. Because these elements, due to their characteristics such as chemical stability, poor degradability and bioaccumulation power at different levels of the food chain, cause numerous ecological damages and risks to living organisms. The present study aims to compare the toxicity of copper (Cu) and lead (Pb) metals at different concentrations on the growth of the microalgae Chaetoceros muelleri.
Methods: After reaching the desired volume, the prepared microalgae were tested to investigate the effect of metal concentrations on growth, chlorophyll and protein over 15 days. F2 culture medium with a salinity of 25 ppt was used for algae cultivation. Metal treatments were selected at five concentrations (0, 5, 50, 250 and 500 μg/L).
Results: The results showed that concentrations of 500 and 250 μg/L of copper and lead significantly inhibited the growth of C. muelleri. The highest growth rate was obtained at a concentration of 5 μg/L. In addition, in this experiment, the highest chlorophyll a content was related to copper metal and the lowest content was related to lead. Additionally, by examining the impact of the tested metals on the protein and fat content of microalgae, it was found that copper, at low concentrations, reduced the protein and fat content, while at high concentrations, it increased the protein and fat content of microalgae. Lead metal at low concentrations increased the protein and fat content, and at high concentrations decreased the protein and fat content.
Conclusion: Also, according to the results obtained, the microalgae C. muelleri can grow at low concentrations, but with increasing metal concentrations and over time, inhibition of microalgae growth was observed.
|
|
| Keywords: : Protein, Lipid, Chaetoceros muelleri, Metals |
|
|
|
Type of Study: Original Article |
Subject:
Marine Medicine
Received: 2025/06/11 | Accepted: 2025/09/9 | Published: 2025/09/1
|
|
|
|
|
|
|
| Send email to the article author |
|
|
|
| Add your comments about this article |
|
|
|
