Device and method for evaluating bio-availability of water pollutants by adopting microcosm system
A technology for water pollutants and bioavailability, applied in the field of environmental chemistry
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Embodiment 1
[0076]To study the bioavailability of perfluorinated compounds (PFCs) in the aquatic organism Daphnia magna. In this embodiment, 11 kinds of PFCs and their two substitutes with higher detection frequency and higher concentration levels in the environment are selected as target pollutants: perfluorobutyric acid (PFBA), perfluorobutane sulfonate (PFBS ), perfluoropentanoic acid (PFPeA), perfluorohexanoic acid (PFHxA), perfluoroheptanoic acid (PFHpA), perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorononanoic acid (PFNA), all Eleven PFCs are fluorodecanoic acid (PFDA), perfluorodecanoic acid (PFUnA) and perfluorododecanoic acid (PFDoA). Turn on the power switch 2, adjust the period setting button 3 and the light intensity setting button 7, and divide 24 hours a day into two periods of 16 hours of light and 8 hours of darkness. Adjust the temperature adjustment button 5 to set the temperature to 24°C, adjust the relative humidity setting button 9 to set...
Embodiment 2
[0083] Research PFC s The bioavailability in the sediment-water system is increased by one trophic level compared with Example 1, and benthic organisms are increased. The selection of the target compound is the same as in Example 1, and the selection of organisms is daphnia magna and chironomid larvae. The setting steps and parameters of the environmental condition system are the same as those in Embodiment 1. In this example, the sediments were collected from the Yongding River. The collected sediments were air-dried, ground, and then passed through a 2mm nylon sieve to remove large-grained gravel and animal and plant residues. The processed sediment covered the bottom of the large container with a thickness of 5 cm. Distilled water was added so that the volume ratio of sediment to deionized water was 1:4. The deposit after the pretreatment, deionized water are added in the large container 24 (bottom diameter 13.0cm, high 17.0cm, polypropylene material) with the volume rat...
Embodiment 3
[0093] Research PFC s The bioavailability in the sediment-water system, compared with Example 2, adds another trophic level and increases fish. In this embodiment, three kinds of organisms, daphnia magna, zebrafish and chironomus larvae were selected. The environmental condition system setting steps are the same as in Example 2, wherein the temperature is set to 16°C. All the other parameters are the same as in embodiment two. The installation steps of the large container of the organic compound exposure system, the placement steps of pollutants and sediments are the same as those in Example 2. Put the benthic organisms after the pretreatment into the sediment, and fix the fixed groove one 28, the fixed groove two 29, and the fixed groove three 30 to the top wall of a large container (bottom diameter 25.0cm, height 30.0cm, polypropylene material) , the medium-sized container is placed; then the four fixing slots 31, five fixing slots 32, and six fixing slots 33 are fixed to...
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Abstract
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