Sediment pore water in situ high resolution sampler

Abstract

The invention relates to a sediment pore water in situ high resolution sampler, and belongs to the technical fields of water sampling in hydrology and water resource science and environmental science.The sampler comprises a perforated plate, a groove plate and dialysis film, a plurality of elongated grooves are formed in one surface of the groove plate, the grooves are formed in the width direction of the groove plate, a plurality of rows of through holes are formed in the perforated plate, a plurality of through holes are formed in each row, the through holes are all formed in the width direction of the perforated plate, one side of the dialysis film closely fits the surface, where the grooves are formed, of the groove plate, the perforated plate closely fits the other side of the dialysis film, the groove plate is detachably fixedly connected with the perforated plate, and a groove corresponds to the position of a row of through holes; the sampler can achieve the collection of porewater of sediments of different depths under the condition that the original state of the sediments is maintained as much as possible, anaerobic situation is ensured and high resolution is guaranteed,and the assembly is simple.

Description

technical field [0001] The invention belongs to the technical field of water body sampling in hydrology and water resource science and environmental science, and in particular relates to a device and a use method for in-situ sampling of sediment pore water. Background technique [0002] Lakes and wetlands are important water sources for the development of human society and economy, and form unique biome ecosystems, but their ecosystem environments are highly susceptible to external changes. At present, water bodies such as rivers, lakes, and wetlands are seriously polluted by heavy metals and nutrients. The pollutants in the overlying water exchange with the sediments, and the pollutants enter the pore water of the sediments and are difficult to remove quickly. When the concentration of pollutants in the overlying water and sediments changes, the pollutants in the sediments will re-enter the overlying water with pore water as the carrier, causing repeated pollution. Such a ...

AI Technical Summary

Problems solved by technology

Although the sampler has the advantages of fast sampling speed and the three-way valve can be matched with a variety of real-time detection instruments, there are still some defects in the device: first, the sampling part of the sampler inserted into the sediment is short, and it is impossible to analyze the entire sediment. Second, the sampler can only sample a single point at a time, and it is difficult to guarantee the representativeness of the sampled pore water

The third is that there is a certain space gap between the sampling unit of the sampler sampling chamber and other connected accessories, which cannot meet the requirements of water sampling under anaerobic conditions.

However, this device still has certain defects: first, there are only two sampling vials at the same depth, so it is difficult to ensure the representativeness of sampling pore water

The second is that the supporting frame is made of stainless steel and has a large frame area. It may react with microorganisms in the sediment environment for a long time, resulting in changes in the composition of the pore water. Sampling vials, heavy workload

Images