Copper-contaminated soil sampling method for surrounding environment of copper grounding grid substation

Abstract

The invention discloses a sampling method for copper contaminated soil in a surrounding environment of a copper grounding net transformer substation. The sampling method is characterized in that the method comprises the steps of taking a dot as a position of a copper contamination source, adopting an orthogonal test scheme of three factors and three levels for the copper contamination source, and collecting a soil sample around the transformer substation according to an orthogonal table, wherein the three factors refer to a sampling direction, a sampling distance and a sampling depth; the three sampling direction levels are 0 DEG, 120 DEG and 240 DEG; the three distance levels are 100m, 300m and 500m; and the three sampling depth levels are 0.2m, 0.6m and 1.0m. For the collected soil sample, copper ion content in the soil sample is measured by a flame atomic absorption spectrophotometry, and the copper contamination degree of the soil around the transformer substation can be evaluated accurately by reference to a standard value related to a soil environment.

Description

Technical field [0001] The invention relates to a soil sampling method, in particular a method for sampling copper-contaminated soil around a substation by using a copper grounding grid. Background technique [0002] With the development of power systems, the requirements for grounding are getting higher and higher. A long-term, reliable and stable grounding system is the fundamental guarantee for maintaining stable operation of equipment and ensuring the safety of equipment and personnel. The key to long-term safe and reliable operation of the grounding system is to choose good quality grounding materials and reliable connections. Compared with hot-dip galvanized steel grounding bodies, copper grounding bodies have great advantages in terms of electrical conductivity, corrosion resistance and construction. Therefore, more and more new substations and old substations ground grid transformations choose to use copper grounding network. [0003] One issue that needs attention in th...

AI Technical Summary

Problems solved by technology

Among them, there are too many sampling points in the grid format, and relatively objective data can be obtained within the specified range, but due to too many sampling points, the workload of testing and analysis is huge

Sampling according to different soil types or water sources is suitable for copper pollution analysis in areas with a large area and rich soil types and water sources. For substations with a small area and relatively single soil types, this method is obviously not suitable.

At the same time, the current research on soil copper pollution generally takes the surface soil within 30cm, that is to say, the current research on soil copper pollution only considers the breadth of copper pollution, but in fact, copper pollution also has depth problems

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