Method for measuring Pb/Dc content in polluted soil remediation plant Calendula officinalis by ICP-OES (inductively coupled plasma and optical emission spectrometry)

Abstract

A method for measuring Pb / Dc content in polluted soil remediation plant Calendula officinalis by ICP-OES (inductively coupled plasma and optical emission spectrometry) comprises: sowing seeds of Calendula officinalis in prepared Pd / Cd combination polluted soil, spraying a mixed solution of DETA (ethylene diamine tetraacetic acid) and tartaric acid to potting soil 35 days after seedlings emerge, removing seedlings with root after 50 days, washing with water and drying, dividing each seedling of Calendula officinalis into an overground part and an underground part, grinding the overground part and the underground part into powder A and powder B, respectively, and treating the powder A and the powder B separately by wet digestion to obtain a digested solution; detecting the digested solution by using an ICP-OES instrument. The invention provides simultaneous detection for various elements, is simple to perform and has low cost, and uses few samples, enabling a great increase in detection efficiency and time saving; changes in the heavy metal content in the remediation plant Calendula officinalis is determined through the method, and the method is of great significance to the treatment of soil pollution.

Description

technical field [0001] The invention belongs to the technical field of elemental analysis and detection, and relates to an ICP-OES method for measuring the content of Pb / Cd elements in the polluted soil remediation plant Calendula officinalis. Background technique [0002] Soil heavy metal pollution is one of the increasingly serious environmental problems that need to be solved urgently. Lead (Pb) and cadmium (Cd), as typical toxic pollutants in soil, are always present in soil due to their similar chemical properties, so they pose serious hazards to humans and the environment. Phytoremediation is a kind of contaminated soil remediation technology that has emerged in recent years. Because of its environmental friendliness, economy, and in-situ remediation of large-area, low-concentration contaminated soil, it has attracted extensive attention and has become a research hotspot in the field of environmental science. [0003] Calendula officinalis is a common ornamental flowe...

AI Technical Summary

Problems solved by technology

At present, there are many studies on the use of chelating agents for enhanced phytoremediation, but reports on the use of low-dose compound ethylenediaminetetraacetic acid (EDTA) and tartaric acid for enhanced phytoremediation of heavy metal-contaminated soils are still rare.

[0004] The plant detection methods involved in domestic and foreign literature mainly include flame atomic absorption spectrometry (AAS), inductively coupled plasma emission spectrometry (ICP-OES), atomic fluorescence spectrometry, spectrophotometry, etc., among which AAS method is more commonly used. However, due to the inability to simultaneously detect multiple elements in the detection process, it is difficult to detect heavy metals in repaired plants, and the detection method is complicated; compared with other methods, ICP-OES: (1) can detect multiple heavy metal elements at the same time, and the operation Convenience, improve detection efficiency; (2) high accuracy, low detection limit, simple analysis process; (3) good repeatability, stable detection results

[0005] The remediation effect of Calendula officinale plants on contaminated soil and the change of heavy metal content in plants after adding chelating agents need a more uniform and efficient method to accurately detect the heavy metal content in remediation plants, and for the detection of heavy metal content in remediation plants Calendula officinalis Methods are rarely reported

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