Sampling and sample preparation device for river polluted bottom sediment for biotoxicity test and working method

Abstract

The invention discloses a sampling and sample preparation device for river polluted bottom sediment for biotoxicity test and a working method, and belongs to the technical field of river regulation. The device comprises a sample preparation box body, a position adjusting element, a bottom sediment collecting element, a bottom sediment sample preparation element and a power supply. By arranging thebottom sediment collecting element at the bottom end of the position adjusting element, the bottom sediment collecting position can be automatically adjusted through the position adjusting element, time and labor are saved, the mechanization degree is high, bottom sediment at multiple collecting points can be collected at the same time, the number of collected samples is increased, the collectingefficiency is improved, and the later bottom sediment toxicity detection accuracy is improved; muddy water in a collected bottom sediment sample is subjected to in-situ separation through the bottomsediment sample preparation element, the detection period is shortened, the separated sample is divided into a plurality of samples to be placed in different liquid containing holes, when the sample needs to be moved, only the liquid containing drawer needs to be drawn out. The structure is simple, and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of river course management, and in particular relates to a sampling device and a working method for river course polluted bottom mud used for biotoxicity testing. Background technique [0002] With the acceleration of urbanization and industrialization, the environmental problems caused by the pollution of various decommissioned chemical enterprises have become increasingly prominent. Most of these sites are seriously polluted by toxic and harmful substances. When the land use function of the site changes, it will lead to risks to human health and the ecological environment.” When there is a river flowing around the site, the river may be seriously polluted, and the river sediment It is often the final destination of river pollutants. The pollutants entering the water body are deposited in the bottom mud through a series of reactions, and the pollutants in the bottom mud may be released again to cause potent...

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Problems solved by technology

[0004] In order to study the specific content of the toxic effect of sediment compound pollution on organisms, it is necessary to collect sediment samples and prepare samples, which requires the use of special devices for collection and sample preparation. , it is impossible to collect sediments in different areas at the same time, the collection efficiency is low, and the collection cycle is long; the stability of the collection head is not enough, and the disturbance to the sediment is large, which affects the active components of the collected samples and reduces the accuracy of subsequent detection

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