A kind of screening method of soil heavy metal chromium remediation plant
A technology for repairing plants and screening methods, applied in the restoration and sorting of contaminated soil, which can solve the problems of complicated screening process, long experimental cycle, and high economic cost, and achieve shortened screening cycle, short screening cycle, and experimental flexibility high effect
Active Publication Date: 2017-11-14
CHINA UNIV OF MINING & TECH
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Problems solved by technology
At present, the commonly used soil heavy metal chromium remediation plant screening methods include field survey method, special plant method and soil seed bank method. These soil heavy metal chromium remediation plant screening methods have poor controllability, complicated screening process, long experimental period, and high economic cost.
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[0025] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.
[0026] Such as Figure 1 to Figure 3 Shown, a kind of screening method of soil heavy metal chromium remediation plant, comprises the following steps:
[0027] (1) Preliminary screening and determination of restoration plants
[0028] Analyze the research results of existing soil heavy metal chromium restoration plants, and preliminarily screen and identify bahia grass and bermudagrass, which are easy to survive, have a short growth cycle, large biomass, and the same family and genus as existing restoration plants, as soil heavy metal chromium restoration plants .
[0029] (2) Field planting and field potting of restoration plants
[0030] A field experiment site with an area of 5m×5m was selected as the field control site for the screening of soil heavy metal chromium restoration plants. The row planting method was used to plant bahia grass and...
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A screening method of restoration plants for soil heavy metal chromium includes the steps that the restoration plants are preliminarily screened and determined, field planting and field potting of the restoration plants are performed, a field experiment is set, and a portal instrument is used for fast detection of soil heavy metal content, sample acquisition and preparation and traditional chemical method detection of a laboratory are performed, and the restoration plants are screened and determined. The screening method combines a field potting experiment and a field control experiment and guarantees that the planting environments of plants of an experiment group and a control group are close to each other; a balanced experiment, a symmetry experiment and a single plant experiment are set, the portal heavy metal content measuring instrument is used for fast detecting the heavy metal content of surface layer soil, comprehensiveness and pertinence of a screening experiment are guaranteed, and the screening period is greatly shortened. The screening method has the beneficial effects that controllability and comparability are high, the screening period is short, the method is comprehensive and reliable, and practical application value is high; and by means of the screening method, the restoration plants for the soil heavy metal chromium can be efficiently and fast screened out, and therefore a soil heavy metal chromium polluted site can be effectively governed.
Description
technical field [0001] The invention belongs to the technical field of resources and environment, and in particular relates to a screening method for soil heavy metal restoration plants, in particular to a screening method for soil heavy metal chromium restoration plants. Background technique [0002] Chromium (Cr) is a heavy metal element ubiquitous in nature, and generally exists in two valence states of trivalent (Ⅲ) and hexavalent (Ⅵ). Chromium (Ⅵ) is oxidizing, can severely corrode and destroy organisms, and is one of the three internationally recognized carcinogenic metal substances. In various fields of modern industry, heavy metal chromium and its compounds are widely used, and are indispensable and important raw materials in industries such as iron and steel, smelting, electroplating, tanning, printing and dyeing, papermaking, textiles, and pharmaceuticals. However, due to the imperfect management system of industrial "three wastes" discharge, a large amount of was...
Claims
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IPC IPC(8): B07C5/34B09C1/00
CPCB07C5/34B09C1/105
Inventor 董霁红戴文婷黄赳赵银娣
Owner CHINA UNIV OF MINING & TECH