A rapid screening method for full-coverage pollution of the site based on frequency-domain electromagnetic induction instrument

Abstract

The invention discloses a method for rapidly screening contamination with full site coverage based on a frequency domain electromagnetic induction device. The method includes the following steps: 1. on-site exploration; 2. background region selection; 3. test point arrangement or mobile route arrangement; 4. on-site exploration implementation; 5. exploration data processing; 6. graph drawing; 7. stationing and sampling analysis verification; and 8. full site coverage contamination classification and zoning. According to the invention, the method applies the frequency domain electromagnetic induction device to site contaminated environment investigation, and has the technical advantages of non-contact, rapid reaction, high-temperature stability and accurate calibration, can monitoring contamination in a full coverage, rapid and efficient manner. The method can rapidly carry out early-stage investigation on screening soil contamination, and is a significant supplement to traditional soilcontamination investigation methods. The method further provides basis for fully addressing the problems of sparse stationing, low efficiency, high cost, and easily neglected contamination blind angles, and can effectively integrate and optimize places for monitoring soil quality and environment.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and relates to a rapid screening method for full-coverage pollution of a site, in particular to a rapid screening method for full-coverage pollution of a site based on a frequency-domain electromagnetic induction instrument. Background technique [0002] The national "Soil Pollution Prevention and Control Action Plan" requires in-depth soil environmental quality surveys; on the basis of existing related surveys, to carry out detailed surveys of soil pollution with a focus on agricultural land and land used by key industries and enterprises; establish a regular survey system for soil environmental quality , carried out once every 10 years. The existing site soil environment survey and monitoring technical specifications or guidelines generally use the system layout method (grid layout method) and expert judgment layout method. The "Technical Regulations on Investigation and Evalu...

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Problems solved by technology

[0003] (1) The site pollution investigation based on the grid layout method only obtains the pollution situation on the "point", and can only roughly describe the soil pollution situation with the "point exceeding standard rate", but it is difficult to deduce the pollution situation on the "surface" , the area of ​​soil pollution cannot be given, which is not conducive to effective risk management and control of site pollution

[0004] (2) Existing investigation methods are easy to miss pollution points or areas, and are not applicable to the redevelopment objectives of some sites, such as the reclamation of abandoned mining areas into agricultural land, the reduction of urban inefficient construction land (reclamation for agricultural use), etc.

The current field soil pollution investigation technology or norms have the problem of blind "point distribution", which often easily misses the polluted area and threatens the safety of crops

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