Method for quickly evaluating pollution of heavy metal in paddy soil
A heavy metal and paddy soil technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of poor correlation of heavy metal enrichment, high detection limit, etc., achieve real-time pollution and widen the effect of application
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Embodiment 1
[0025] The rice plants used in this example come from rice fields in Chenzhou, Hunan and Qiyang, and the content of heavy metal arsenic in the soil is 10 mg kg -1 to 90mg kg -1 . The measuring instrument is a portable X-ray fluorescence spectrometer (FPXRF), the model is XL3t series, and the production company is NITON Corporation of the United States.
[0026] The concrete steps of this embodiment are:
[0027] 1) Collect the rice root system and rhizosphere soil when they are mature and ready to be harvested, and the accumulation of iron film on heavy metals is not less than 90% of the total heavy metal content in the root system;
[0028] 2) Carry out soil removal, water washing, drying and shredding pretreatment on the above-mentioned rice root system; wherein, the drying step is to dry in an oven at 70°C for more than 96 hours, and the dry weight of the obtained sample is not less than 1.2g, and the particle size Not more than 1mm, thickness not less than 6.14mm;
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Embodiment 2
[0037] The rice plants used in this example come from rice fields in Chenzhou, Hunan and Qiyang, and the content of heavy metal arsenic in the soil is 10 mg kg -1 to 90mg kg -1 . The measuring instrument is a portable X-ray fluorescence spectrometer (FPXRF), the model is XL3t series, and the production company is NITON Corporation of the United States.
[0038] The concrete steps of this embodiment are:
[0039] 1) Collect the rice root system and its stems, leaves and seeds when they are mature and ready to be harvested, and the accumulation of heavy metals in the iron film is not less than 90% of the total heavy metal content in the root system;
[0040] 2) Carry out soil removal, water washing, drying and shredding pretreatment on the above-mentioned rice root system; wherein, the drying step is to dry in an oven at 70°C for more than 96 hours, and the dry weight of the obtained sample is not less than 1.2g, and the particle size Not more than 1mm, thickness not less tha...
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