Root system simulation collecting system for monitoring diffusion flux of PAHs in soil

Abstract

The invention discloses a root system simulation collecting system for monitoring diffusion flux of PAHs in soil. The root system simulation collecting system comprises a passive type soil solution collecting bin and a PAHs root system simulation collecting system arranged in the collecting bin. The passive type soil solution collecting bin comprises a collecting bin body glass column pipe, a Teflon jacket arranged on the bottom of the glass column pipe in a sleeving mode and a ground jacket arranged on the top of the glass column pipe in a sleeving mode, and a multihole water inlet with holes in the side portion is formed in the lower middle portion of the glass column pipe. The PAHs root system simulation collecting system comprises an SPE extraction column pipe arranged in the glass column pipe, the upper portion of the SPE pipe is packed with a glass hollow support pipe, and the upper portion of the support pipe is sealed through a rubber stopper. The multihole water inlet is formed in an annular inward-concave mode. A glass fiber filter membrane, a polytetrafluoroethylene millipore filtration interlayer and a stainless steel mesh support layer are sequentially arranged in the inward-concave position from interior to exterior. The root system simulation collecting system can be applicable to collecting and diffusion flux testing of PAHs in percolate under different natural environments, and the system is reasonable in design, simple in manufacturing process, low in cost, convenient to operate, efficient and durable.

Description

technical field [0001] The invention belongs to the technical field of soil environment protection, and in particular relates to a root simulation acquisition system for monitoring the diffusion flux of PAHs in soil. Background technique [0002] The pollution caused by persistent organic pollutants (POPs), especially polycyclic aromatic hydrocarbons (PAHs), has seriously threatened the quality and safety of agricultural products. The impact of the migration and transformation of pollutants in the environment has become an urgent task in front of people, and it is also a major issue directly related to people's food safety and life safety. Although the conventional plant planting evaluation method conforms to its own root absorption law, there are great differences in the adsorption, desorption, transpiration absorption, in vivo degradation and even rhizosphere microbial degradation of organic pollutants under the same soil conditions by different crops. Affected by the ext...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of long test period, poor repeatability, unavoidable degradation of POPs by the plant itself, and susceptibility to environmental influences in the conventional plant planting evaluation method, the present invention provides an efficient, accurate, time-saving and low-cost method for Root Simulation Acquisition System for PAHs Diffusion Flux Monitoring in Soil

Images