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Title: A novel respirometer for biological toxicity tests
Authors: Zhang, M
Chen, H
Wong, KY 
Keywords: Heavy metal
Luminescence quenching
Toxicity test
Issue Date: 1997
Publisher: Elsevier
Source: Journal of environmental sciences, 1997, v. 9, no. 3, p. 345-351 How to cite?
Journal: Journal of environmental sciences 
Abstract: A respirometer has been developed for microbial toxicity tests. The respirometer is based on luminescence quenching by molecular oxygen. The oxygen-sensing film consists of luminescent ruthenium complex adsorbed on amorphous fumed silica and immobilized inside silicone rubber. The luminescence intensity depends on the oxygen concentration of sample in contact with sensing film. The inhibition effect of heavy metals on the respiration rate of microorganisms can be evaluated by monitoring the luminescence intensity of the sensing film. The toxicity of Cu2+, Zn2+ , Ni2+ , Cr3+, Pb2+ and Hg2+ on activated sludge was tested using the respirometer. The results indicated that the proposed method was sensitive to the heavy metals tested in this experiment. It was feasible to use the respirometer for microbial toxicity tests.
ISSN: 1001-0742
EISSN: 1878-7320
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