Influence of Algae Age and Population on the Response to TiO 2 Nanoparticles

David M. Metzler, Ayca Erdem and Chin Pao Huang
Additional contact information
David M. Metzler: School of Arts and Sciences, Gwynedd Mercy University, Gwynedd Valley, PA 19437, USA
Ayca Erdem: Department of Environmental Engineering, Akdeniz University, Antalya 07058, Turkey
Chin Pao Huang: Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19711, USA

IJERPH, 2018, vol. 15, issue 4, 1-16

Abstract: This work shows the influence of algae age (at the time of the exposure) and the initial algae population on the response of green algae Raphidocelis subcapitata to titanium dioxide nanoparticles (TiO 2 NPs). The different algae age was obtained by changes in flow rate of continually stirred tank reactors prior to NP exposure. Increased algae age led to a decreased growth, variations in chlorophyll content, and an increased lipid peroxidation. Increased initial algae population (0.3−4.2 × 10 6 cells/mL) at a constant NP concentration (100 mg/L) caused a decline in the growth of algae. With increased initial algae population, the lipid peroxidation and chlorophyll both initially decreased and then increased. Lipid peroxidation had 4× the amount of the control at high and low initial population but, at mid-ranged initial population, had approximately half the control value. Chlorophyll a results also showed a similar trend. These results indicate that the physiological state of the algae is important for the toxicological effect of TiO 2 NPs. The condition of algae and exposure regime must be considered in detail when assessing the toxicological response of NPs to algae.

Keywords: algae age; lipid peroxidation; chlorophyll; TiO 2 nanoparticles (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1660-4601/15/4/585/pdf (application/pdf)
https://www.mdpi.com/1660-4601/15/4/585/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:15:y:2018:i:4:p:585-:d:137957

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().