Growth Inhibition and Recovery of Lemna aequinoctialis after Pulse Exposure to Cd2+, Cr6+, Pb2+ and Cu2+
- 10.2991/icmmbe-16.2016.24How to use a DOI?
- pulse exposure; heavy metal ion; growth inhibition; recovery; effect assessment of pollutants
The exposures of aquatic organisms to pollutants are usually pulses yet the exposure concentrations in the standard toxicity tests are constant. It raises a question that whether these standard tests include the effects of pulse exposure Therefore, 24-hour pulse exposure to 4 heavy metal ions (Cd2+ Cr6+ Pb2+ Cu2+) was given to Lemna aequinoctialis, and its effects on the growth of L.aequinoctialis was observed in the following 6 days. In the meantime, constant exposure through the methods of standard OECD tests was given and observation was made. Comparisons between the two tests were drawn. In the pulse exposure test, growth was inhibited at first with the increase of concentrations of Cd2+ Cr6+ Pb2+ Cu2+, but the growth rate reached the level of control group within the next 6 days. EyC50 of the pulse group is 1 to 2.5 times higher than that of the OECD group. This research provides basis for the comparison between the effects of two exposure regimes at an experimental level. It is suggested that results can be applied in the effect assessment of intermittently released pollutants.
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Jingbo Xu AU - Fengyi Zhang PY - 2016/09 DA - 2016/09 TI - Growth Inhibition and Recovery of Lemna aequinoctialis after Pulse Exposure to Cd2+, Cr6+, Pb2+ and Cu2+ BT - Proceedings of the6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016) PB - Atlantis Press SP - 119 EP - 124 SN - 2352-5401 UR - https://doi.org/10.2991/icmmbe-16.2016.24 DO - 10.2991/icmmbe-16.2016.24 ID - Xu2016/09 ER -