Method for predicting wheat root elongation toxicity of nickel ions in soil, and application thereof

A technology of nickel ions and wheat roots, which is applied in the prediction and application field of the elongation toxicity of nickel ions to wheat roots in soil, and can solve the problems of incomplete evaluation and poor applicability of heavy metal toxicity assessment methods

Inactive Publication Date: 2017-07-07
NANJING UNIV
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Problems solved by technology

[0005] Aiming at the problems of incomplete assessment and poor applicability in existing heavy metal toxicity assessment methods in soil, the present invention provides a method for predicting toxicity of nickel ions to wheat root elongation in soil and its application. In soil solution, the more common A large number of cations are mainly Ca 2+ , Mg 2+ and H + At the same time, the form of nickel ions that may produce biotoxicity in solution is mainly Ni 2+

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  • Method for predicting wheat root elongation toxicity of nickel ions in soil, and application thereof
  • Method for predicting wheat root elongation toxicity of nickel ions in soil, and application thereof
  • Method for predicting wheat root elongation toxicity of nickel ions in soil, and application thereof

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Embodiment 1

[0093] For the three competing cations (Ca 2+ , Mg 2+ and H + ) using the control variable method, only changing the concentration of a certain cation while controlling the concentration of other cations to remain unchanged, and each treatment group was repeated three times. See Tables 3 and 4 for the ionic components of the sand culture solution in each treatment group. Before the experiment, the wheat seeds were bred, and the specific breeding method was as follows: the cleaned and sterilized wheat seeds were evenly placed in a petri dish soaked with ultrapure water containing filter paper, and the petri dish was placed in an artificial climate box. breeding in. The environmental parameters of the climate box are temperature 20°C, air humidity 80%, no light, and the breeding lasts for 48 hours, and the filter paper in the petri dish should be kept moist during the breeding period. After the 48h breeding was completed, the seeds with good germination condition and three s...

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Abstract

The invention discloses a method for predicting wheat root elongation toxicity of nickel ions in soil, and an application thereof, and belongs to the field of ecological heavy metal toxicity assessment. According to the method disclosed by the invention, the toxicity competitive inhibition effect of Ca<2+> and other cations on the nickel ions is considered, the influence of the osmotic pressure effect in soil conditions to the toxicity is corrected, and meanwhile the toxic effect of nickel is calculated by obtaining the activity of the nickel ions by using the visual MINTEQ program. Firstly, biological toxicity suppression parameters of the cations to the nickel ions, and the toxic effect parameters and the osmotic pressure parameters of the nickel are determined under a sand culture condition, the obtained parameters can be applied to the prediction of the wheat root toxicity of the nickel ions under different soil types, and the method is also applicable to predicting the root elongation toxicity of nickel ions to other crops and can provide reference for soil heavy mental ecological risk assessment and soil pollution abatement.

Description

technical field [0001] The invention belongs to the field of ecological heavy metal toxicity evaluation, more specifically, relates to a method for predicting the elongation toxicity of nickel ions to wheat roots in soil, and obtains the prediction model and parameters of the elongation toxicity of nickel ions to wheat roots under sand culture conditions , this method not only considers the competition between cations and heavy metal ions on biofilm ligands, but also considers the influence of osmotic pressure of a large number of cations in the solution. The obtained parameters have a good effect on predicting the root toxicity of nickel in different soil types . Background technique [0002] Nickel pollution is a kind of heavy metal pollution caused by excessive nickel and its compounds entering the environment. High concentrations of nickel in soil and water can have toxic effects on animals and plants. At the same time, food crops will have a certain enrichment effect o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/0098Y02A50/20
Inventor 顾雪元姜洋谷成
Owner NANJING UNIV
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