A method for estimating the change of soil heavy metal concentration with time

Abstract

The embodiment of the present invention discloses a method for estimating the concentration of heavy metals in soil over time, and specifically relates to the field of prediction of heavy metals in soil. The form of the method for estimating the concentration of heavy metals over time is: C t =C 0 -E; E=λ*C 0 *R a1 *K a2 *LS a3 *G a4 *P a5 / z; the method of using this model to predict soil heavy metals is as follows: obtain the initial value of soil heavy metals, regional altitude, soil particle size and organic carbon TOC content parameters through experiments and inquiries; organize these parameters into the excel table in turn; in the Matlab software program on the Internet, program the formula of the estimation method of the concentration change with time; automatically read and calculate the parameter data in the excel table through the programmed Matlab software; finally input the forecast period, run it, and get the result; compare the obtained result with the Compare the measured values ​​to verify the degree of fit. Compared with the prior art, the present invention provides a more refined model, which can deal with various situations, and the involved parameters such as altitude and soil physical and chemical properties can be queried or measured.

Description

technical field [0001] The embodiments of the present invention relate to the field of prediction of soil heavy metals, in particular to methods for estimating changes in soil heavy metal concentrations over time. Background technique [0002] Heavy metal pollution of the soil (heavy metal pollution of the soil) refers to human activities, the content of trace metal elements in the soil exceeds the background value, and the excessive content caused by excessive deposition is collectively referred to as soil heavy metal pollution; [0003] Heavy metals refer to metals with a specific gravity equal to or greater than 5.0, such as Fe, Mn, Zn, Cd, Hg, Ni, Co, etc.; As is a metalloid, but due to its chemical properties and environmental behavior are similar to heavy metals, Therefore, when discussing heavy metals, arsenic is often included, and some directly include it in the scope of heavy metals. Due to the high content of iron and manganese in soil, it is generally considered...

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Problems solved by technology

[0009] For this reason, an embodiment of the present invention provides a method for estimating the concentration of heavy metals in soil over time. By using the method for estimating the concentration of heavy metals over time to predict soil heavy metals, the current and future changes in the concentration of heavy metals in the soil can be predicted, and compared with Compared with the prior art, the model provided by the present invention is more refined and can cope with various situations, and the parameters involved such as altitude and soil physical and chemical properties can be queried or measured to solve the problem of environmental heavy metal pollution in the prior art growing problems

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