Response of marine microalgae towards short single walled
1. Journal of Natural Sciences Research www.iiste.org
ISSN 2224-3186 (Paper) ISSN 2225-0921 (Online)
Vol.4, No.13, 2014 – Special Issue
56
Selection and peer review by the scientific conference committee under responsibility of the Australian Society
for Commerce, Industry and Engineering
Response of marine microalgae towards short single-walled
carbon nanotubes
Kok Yih-Yih 1
, Aniqah Zulfa Bt Latif 2
and Chu Wan-Loy3
1
International Medical University, Department of Human Biology, Kuala Lumpur, Malaysia
2
International Medical University, Kuala Lumpur, Malaysia
3
International Medical University, Department of Post Graduate and Research Studies, Kuala Lumpur, Malaysia
* Email address of corresponding author: yihyih_kok@imu.edu.my
Abstract
Nanoparticles have vast applications in industrial and consumer products such as household detergents,
sunscreen, anti-bacterial clothing, electrical and telecommunication devices, sports equipment, medical treatment
tools and others. The production of nanomaterials is increasing remarkably with an expected resultant increase in
the distribution of nanoparticles in the environment. Many health problems have been correlated to the exposure
of nanoparticles. For instance, engineered carbon nanotubes cause inflammation, fibrosis and oxidative stress in
both in vitro and in vivo models and titanium dioxide nanoparticles could lead to chronic airflow obstruction.
Marine microalgae play a pivotal role in all marine ecosystems as they form the food and energy base for all
organisms living in lakes, ponds, streams and sea. They provide 75% of oxygen content in the atmosphere.
Therefore, an effect on algal population may have an important impact on the whole ecosystem. The aim of this
study is to assess the toxicity of short single-walled carbon nanotubes (SWCNT) and amount of reactive species
oxygen (ROS) released in two marine microalgae Dunaliella tertiolecta and Isochrysis sp using pigment
quantification method and H2DCFDA dye. We found that SWCNT reduced the algal cell number by 50% at 30
mg/L and 50 mg/L after 96 h of exposure in Isochrysis sp. and Dunaliella tertiolecta respectively. In addition, 6-
10 folds of ROS were released by these marine microalgae when exposed to SWCNT (50 mg/L). In conclusion,
the presence of nanoparticles in the environment causes ecotoxicity and its impact to biodata should not be
neglected.
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