Prediction method and application of cadmium-nickel compound on wheat root elongation toxicity in soil

A prediction method, wheat root technology, applied in measuring devices, biological testing, testing plants/trees, etc., can solve the problems of incomplete evaluation and poor applicability of heavy metal toxicity evaluation methods

Active Publication Date: 2021-09-03
NANJING UNIV
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Problems solved by technology

[0004] 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 cadmium-nickel compound to wheat root elongation in soil and its application

Method used

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  • Prediction method and application of cadmium-nickel compound on wheat root elongation toxicity in soil
  • Prediction method and application of cadmium-nickel compound on wheat root elongation toxicity in soil
  • Prediction method and application of cadmium-nickel compound on wheat root elongation toxicity in soil

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Embodiment 1

[0085] In the known competing cation of Cd and Ni is H + and Mg 2+ On the basis of the Cd / Ni single stress sand culture experiment, the control variable method was used to change only H + / Mg 2+ The concentration of other cations is kept constant while controlling the concentration of other cations. Afterwards, the Cd-Ni composite stress experiment was carried out to control the other cations in the solution (K + 、Na + , Ca 2+ , Mg 2+ ) concentration remains the same, only changing the Cd in the solution 2+ and Ni 2+ concentration. In order to study a large number of cations (K + 、Na + , Ca 2+ , Mg 2+ ) effect of osmotic pressure on wheat root elongation, the osmotic pressure effect experiment without Cd-Ni stress was carried out, using the control variable method, only changing the concentration of certain cations while controlling the concentration of other cations to remain unchanged. Each treatment group had three replicates. See Tables 3 and 4 for the ionic ...

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Abstract

The invention discloses a method for predicting toxicity of cadmium-nickel compound to wheat root elongation in soil and an application thereof, belonging to the technical field of ecological heavy metal toxicity assessment. The present invention is based on the known Cd 2+ and Ni 2+ The competing cation is H + and Mg 2+ On the basis of , considering the toxicity inhibitory effect of competing cations and the osmotic pressure of salt solution, the combined toxicity effect of Cd and Ni was calculated by adding the individual toxic concentrations. Firstly, the parameters of Cd-Ni composite toxicity effect and the osmotic pressure effect parameters of salt solution were obtained by sand culture experiments, and then the obtained parameters were applied to the prediction of Cd-Ni composite toxicity effect in different soils. This method is also applicable to the prediction of the toxic effect of Cd-Ni compound on root elongation of other crops, and provides a new method for the ecological risk assessment of soil heavy metals and regional soil pollution control.

Description

technical field [0001] The invention belongs to the field of ecological heavy metal toxicity assessment, and more specifically relates to a method for predicting the elongation toxicity of cadmium-nickel compound on wheat root elongation in soil. The prediction model of the elongation toxicity effect of cadmium-nickel compound on wheat root elongation is obtained by sand culture experiment and parameters. This method not only considers the competition effect of heavy metal ions and other cations and biological ligands, but also considers the osmotic pressure effect of soil salt solution. The obtained parameters have a good prediction effect on the toxicity of cadmium and nickel in different soil types. Background technique [0002] According to the 2014 soil environmental quality survey report, cadmium and nickel are the two most serious heavy metal pollutants in my country. In addition, the widespread use of nickel-cadmium batteries has caused serious cadmium-nickel compou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/50G01N33/00
CPCG01N33/0098G01N33/5097
Inventor 顾雪元朱泊静
Owner NANJING UNIV
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