Heavy metal bioavailability testing device and method for simulating human gastric digestion characteristics

Abstract

The invention discloses a heavy metal bioavailability testing device and method for simulating human gastric digestion characteristics. The testing device comprises a container for simulating gastricdigestion reaction; a gastric digestion reaction feed module connected with the container for simulating the gastric digestion reaction and used for supplementing liquid and gas required for simulating the human gastric digestion in the container, thereby simulating the human gastric juice secretion and anaerobic digestion environment; a stirring module located at the bottom of the container for simulating the gastric digestion reaction and used for stirring the liquid in the container, thereby simulating the peristole of the human stomach; a temperature control module connected with the container for simulating the gastric digestion reaction and used for controlling the temperature of the liquid in the container, thereby simulating the temperature environment of the human stomach; a monitoring module located in the container for simulating the gastric digestion reaction and used for monitoring the temperature and pH value of the liquid in the container; and a digestion reaction collection module communicating with the container for simulating the gastric digestion reaction, and used for simulating the gastric emptying and collecting the digested liquid in the container.

Description

technical field [0001] The invention belongs to the technical field of environmental investigation and risk assessment of polluted sites, and relates to a soil heavy metal bioavailability test device and method for simulating human stomach digestion characteristics. Background technique [0002] At present, the situation of soil pollution in my country is not optimistic, especially in some urban areas with rapid economic development and industrial agglomeration. With the acceleration of urbanization and the advancement of industrial upgrading and adjustment, the problem of soil pollution on the site has become increasingly prominent, endangering the safety of the living environment and ecological security. . Heavy metals are common characteristic pollutants in the polluted sites left over from lead-acid battery, electroplating, chemical industry, smelting and other industries. They have the characteristics of easy accumulation, biodegradation, hidden hysteresis and irreversib...

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Problems solved by technology

In recent years, domestic scholars have also carried out related research work. For example, Zhong Maosheng et al. have invented a heavy metal availability test device (CN103439476B) that simulates the characteristics of human digestion. There have been researches and related invention patents at home and abroad, only focusing on the elements of digestive juice components, temperature environment, pH environment, etc., and there is still a lack of bionic research on the main digestive organs such as ...

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