Evaluation of a novel automated water analyzer for continuous monitoring of toxicity and chemical parameters in municipal water supply
| Autor: | Marzia Bernasconi, Sergio Bodini, Xingpeng Zhou, Angela Manenti, Roberta Arosio, Annalisa Tortelli, Pompeo Moscetta, Luca Sanfilippo, Stefano Di Lucia, Marzio Malizia |
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| Rok vydání: | 2018 |
| Předmět: |
Spectrum analyzer
Health Toxicology and Mutagenesis Photobacterium phosphoreum 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Supply Toxicity Tests 0105 earth and related environmental sciences 021110 strategic defence & security studies Chromatography biology Photobacterium Luminescent bacteria Drinking Water Public Health Environmental and Occupational Health General Medicine Equipment Design Robotics Contamination biology.organism_classification Pollution Monitoring program Acute toxicity Italy Toxicity Luminescent Measurements Environmental science Water quality Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Ecotoxicology and environmental safety. 157 |
| ISSN: | 1090-2414 |
| Popis: | A novel tool, the DAMTA analyzer (Device for Analytical Monitoring and Toxicity Assessment), designed for fully automated toxicity measurements based on luminescent bacteria as well as for concomitant determination of chemical parameters, was developed and field-tested. The instrument is a robotic water analyzer equipped with a luminometer and a spectrophotometer, integrated on a thermostated reaction plate which contains a movable carousel with 80 cuvettes. Acute toxicity is measured on-line using a wild type Photobacterium phosphoreum strain with measurable bioluminescence and unaltered sensitivity to toxicants lasting up to ten days. The EC50 values of reference compounds tested were consistent with A. fischeri and P. phosphoreum international standards and comparable to previously published data. Concurrently, a laboratory trial demonstrated the feasibility of use of the analyzer for the determination of nutrients and metals in parallel to the toxicity measurements. In a prolonged test, the system was installed only in toxicity mode at the premises of the World Fair “Expo Milano-2015″, a high security site to ensure the quality of the supplied drinking water. The monitoring program lasted for six months during which ca. 2400 toxicity tests were carried out; the results indicated a mean non-toxic outcome of −5.5 ± 6.2%. In order to warrant the system's robustness in detecting toxic substances, Zn was measured daily with highly reproducible inhibition results, 70.8 ± 13.6%. These results assure that this novel toxicity monitor can be used as an early warning system for protection of drinking water sources from emergencies involving low probability/high impact contamination events in source water or treated water. |
| Databáze: | OpenAIRE |
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