Method for detecting mixing uniformity of soil heavy metal pollution samples

Abstract

The invention provides a method for detecting mixing uniformity of soil heavy metal pollution samples. The method comprises steps as follows: (1), methyl violet powder is mixed with a plurality of to-be-detected soil heavy metal pollution samples; (2), the mixed powder at different sites is selected and sampled at random; (3), the mixed powder at different sites is dissolved with ethyl alcohol respectively and prepared to form solutions; (4), light absorption values of the solutions at the level of 579 nm are measured respectively; (5), CV (coefficients of variation) of distribution of methyl violet in the mixed powder at different sites are calculated. According to the detection method, the mixing uniformity of the soil heavy metal pollution samples is reflected by comparing differences of distribution of methyl violet in the mixed powder samples at different sites, mixing uniformity of heavy metal ions in soil is accurately detected, the detection accuracy of the content of heavy metals in soil is improved later, and further treatment of pollution of heavy metals in soil is facilitated.

Description

technical field [0001] The invention relates to the research field of soil heavy metal pollution detection and comprehensive prevention and control, in particular to a detection method for mixing uniformity of soil heavy metal pollution samples. Background technique [0002] Heavy metals from pesticides, wastewater, sludge, and atmospheric deposition mainly include elements with significant biological toxicity such as mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid arsenic (As), as well as some Toxic zinc (Zn), copper (Cu), nickel (Ni) and other elements are gradually polluting the soil that is closely related to our lives. Excessive heavy metals can cause plant physiological dysfunction, nutritional imbalance, and affect plant roots and leaves. development; heavy metal pollutants have little mobility in the soil, are not easy to leach with water, and are not degraded by microorganisms. After entering the human body through the food chain, they will damage...

AI Technical Summary

Problems solved by technology

At present, in the research on the detection of heavy metal content in soil, the samples are often directly tested by various means and conditions after being stirred by agitator or mixer during processing. The processing is simple, the accuracy is not high, and the uniformity is often not up to the experiment. Requirements, large or small errors will be brought to follow-up experiments, so it is difficult to meet the sample needs of today's high-tech means

[0004] The methyl violet tracer technology is mostly used in the field of feed mixing, and there are few domestic methods that use the methyl violet tracer technology to detect the uniformity of soil heavy metal contaminated samples.

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