[Influential factors on the toxicity of pentachlorophenol sodium with MICROTOX system in water].
The biological toxicity of pentachlorophenol sodium (Na-PCP), a typical kind of aquatic organic pollutants, was tested with the MICROTOX system using luminescent bacteria with the influence of several factors taken into consideration. The EC50 of Na-PCP increases with the increasing of the pH and hardness of the sample. The EC50 (15 min) of Na-PCP is approximately equal to its EC50 (20 min). Compared with some common organic pollutants, which exhibit little influence on the toxicity of Na-PCP when mixed, Na-PCP is more toxic. A reduction of 14% in relative luminescent rate was observed in the experiment with a natural sample. The natural sample exhibits similar influence on the toxicity of Na-PCP similarly compared with unionized water.
Shi
Wei
W
Research Centre for Persistent Organic Pollutants, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Niu
Jun-feng
JF
Yu
Gang
G
D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods; D010416:Pentachlorophenol / Q000032:analysis / Q000633:toxicity*; D010776:Photobacterium / Q000187:drug effects; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*; D014881:Water Supply / Q000032:analysis*
D014874:Water Pollutants, Chemical; D010416:Pentachlorophenol