A long-term exposure experimental system suitable for aquatic model organisms

Abstract

The invention discloses a long-term exposure experimental system suitable for aquatic model organisms. The system comprises a plurality of exposure cylinders, wherein the inside of each exposure cylinder is connected with a separation frame, each separation frame is connected with a leakage plate, a water inlet pipe is arranged above each exposure cylinder, and an included angle favorable for generating water vortex is formed between a water outlet of each water inlet pipe and the cylinder wall of each exposure cylinder; a water level control valve is arranged on the water inlet pipe, and a water pump is fixedly arranged inside each exposure cylinder. The long-term exposure experimental system suitable for aquatic model organisms is ingenious in structure and design, and the separation frame is designed into a funnel shape, a certain vortex can be formed by the liquid of each exposure cylinder through the 45-degree water outlet included angle formed by the water outlet of the water inlet pipe in each exposure cylinder and the cylinder body, thereby discharging excrement and like impurities from the leakage plate in the middle of the separation frame, and reducing the labor intensity for cleaning the cylinder bodies; the labor intensity of the worker can be greatly reduced through automatic design, the automatic running and closing of a booster pump can be realized, and the running is reliable and stable.

Description

technical field [0001] The invention relates to the technical field of environmental toxicology of aquatic organisms, in particular to a long-term exposure experiment system suitable for aquatic model organisms. Background technique [0002] Environmental pollutants refer to exogenous chemical substances that interfere with the endocrine mechanism of the human body and affect the normal regulation of the human body. There are many kinds of environmental pollutants, including inorganic pollutants, PCDDs, PCBs, PCDFs, organochlorine pesticides, organophosphorus pesticides, PAHs, etc. The impact of environmental pollutants on the human body and organisms and their mechanism of action are the main contents of environmental toxicology research, among which aquatic organisms (such as zebrafish, medaka) are widely used in scientific research as laboratory model organisms. The concentration of environmental pollutants in air, soil and water is usually extremely low (ng / L-ug / L), but...

AI Technical Summary

Problems solved by technology

[0003] Water body exposure is the closest to the natural way of life of fish and has become the main exposure method of environmental pollutant laboratory exposure. The usual exposure methods of aquatic organisms are divided into static water exposure and dynamic water exposure. Static exposure does not need to replace the exposure solution. The time is short (less than one week), and long-term exposure experiments cannot be carried out; while dynamic water exposure requires regular replacement of part of the exposure liquid, and long-term exposure experiments can be carried out, but long-term exposure requires feeding fish food 1-2 times a day to maintain fish. Therefore, fish food residues, fish feces, and some particulate impurities in the water will cause the water quality in the exposed tank to deteriorate in a short period of time (usually 12-24 hours). The traditional method is to replace the exposed tank with a large number of Liquid and increase the frequency of cleaning fish tanks to maintain water quality, which greatly increases labor intensity; and the traditional method of frequent large-scale replacement of exposure liquid and cleaning fish tanks will affect the growth and reproduction of fish, and the results of its exposure experiments will be largely questioned , so we propose a streamlined long-term exposure method, that is, a long-term exposure experiment system suitable for aquatic model organisms to solve the above problems, so as to realize a low-cost automated long-term exposure experiment process

Images