Method for separating particulate matters and plankton from water body efficiently and quickly

Abstract

The invention discloses a method for separating particulate matters and plankton from a water body efficiently and quickly. According to the method, the plankton and suspended particulate matter samples are successfully subjected to a separating treatment operation, so that zooplankton, phytoplankton and the suspended particulate matters are continuously and effectively separated from the water body of a river in sequence. The method disclosed by the invention has the advantages of wide application range, simple operation, quickness and the like, and provides an important technical means for research on environmental ecology of a large-scale open water body.

Description

technical field [0001] The invention relates to the technical field of ecological research on plankton in river water bodies, and more particularly relates to a rapid separation method for plankton and plants in water bodies and its application in quantitative analysis. Background technique [0002] There is a predation relationship between plankton, and the predation effect of zooplankton on phytoplankton and particulate matter causes differences in trophic levels among the three, which will directly lead to the detection of isotopes, organic pollutants, and heavy metal residues. The detection results among plants, zooplankton and particulate matter will have large differences, for example, the fractionation of isotopes from high trophic level to low trophic level makes the nitrogen isotope value of zooplankton much higher than that of phytoplankton and particulate matter, while in organic matter dyeing detection Due to the bioaccumulation effect of different trophic levels...

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Problems solved by technology

[0003] However, phytoplankton, zooplankton, and suspended particulates in large rivers are often mixed together, and the small-sized particles are the degradation of macromolecular organic matter in the upstream or along the coast, such as dead plants and animals. The particle sizes are all in a similar range (45 µm to 1000 µm), and the samples collected by traditional plankton nets are basically mixed together, making it difficult to further separate

[0004] At present, the existing methods for separating phytoplankton, zooplankton, and organic particles are very complicated and inefficient. In addition, many scientific researchers use multi-layer nets (different pore sizes) to screen plankton and suspended particles of different particle sizes step by step. The biggest problem with these methods is that the consumables are expensive, such as High-purity silica adsorbents are expensive, and most of them are purchased from abroad. Although the method of multi-layer netting reduces the cost, it loses a lot in the process of collection and separation, which is difficult to meet the requirements of scientific research tasks for a large number of samples. need

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