Method for exploring a migration mechanism of PAHs (polycyclic aromatic hydrocarbons) in bottom mud of rice-crab co-cropping farmland by using fluorescent sand particle tracing method

A tracer and sediment technology, applied in fluorescence/phosphorescence, individual particle analysis, particle and sedimentation analysis, etc., which can solve the problem of inability to explore the migration of PAHs in the sediment of rice-crab co-cropping farmland, etc., and improve the count. The effect of precision and efficiency

Active Publication Date: 2021-06-29
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the prior art cannot explore the migration of PAHs in the sediment phase of the rice-crab co-cropping farmland, and to provide a method to explore the migration of PAHs in the rice-crab co-cropping farmland sediment by using fluorescent sand particle tracer method. The method of PAHs migration mechanism in sediment phase

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  • Method for exploring a migration mechanism of PAHs (polycyclic aromatic hydrocarbons) in bottom mud of rice-crab co-cropping farmland by using fluorescent sand particle tracing method
  • Method for exploring a migration mechanism of PAHs (polycyclic aromatic hydrocarbons) in bottom mud of rice-crab co-cropping farmland by using fluorescent sand particle tracing method
  • Method for exploring a migration mechanism of PAHs (polycyclic aromatic hydrocarbons) in bottom mud of rice-crab co-cropping farmland by using fluorescent sand particle tracing method

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specific Embodiment approach 1

[0059]Specific implementation mode 1: This implementation mode is a method for exploring the migration mechanism of PAHs in the sediment phase of the rice-crab co-cropping farmland by using the fluorescent sand particle tracing method. Specifically, it is completed according to the following steps:

[0060] 1. Prepare the materials needed for the microcosm experiment: ①. Select the microcosm system device: select a rectangular parallelepiped glass device with a length of 30cm, a width of 18cm and a height of 20cm as the microcosm system device; Chinese mitten crabs are domesticated at room temperature for 7 days before being released, and the weight of each mitten crab is between 0.92kg and 1.25kg; ③. Rice cultivation: break dormancy and soak seeds to accelerate germination of rice seeds to obtain rice buds , sow the rice bud seeds, and then cultivate them for 75 days according to the conventional rice field water and fertilizer management; ④, Fluorescent sand pretreatment: cho...

specific Embodiment approach 2

[0090] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the specific process of breaking dormancy described in step 1.3. Soak for 18h ~ 20h. Others are the same as the first embodiment.

specific Embodiment approach 3

[0091] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: soaking and accelerating germination described in step 1 ③: carry out soaking and accelerating germination at a temperature of 30 to 32°C for 1d to 2d, and sow the rice bud seeds . Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for exploring a migration mechanism of PAHs (polycyclic aromatic hydrocarbons) in bottom mud of a rice-crab co-cropping farmland by using a fluorescent sand particle tracing method, and relates to a method for revealing the migration mechanism of the PAHs in the bottom mud by using the fluorescent sand particle tracing method. The invention aims to solve the problem that migration of PAHs in the bottom mud of the rice-crab co-cropping farmland in a bottom mud phase cannot be researched in the prior art. The method comprises the following steps: 1, preparing materials required by a microcosm experiment; 2, constructing a microcosm experiment system; 3, intercepting a target sample; 4, performing qualitative analysis on the disturbance range; 5, calculating the relative fluorescent substance concentration; 6, calculating the relative phenanthrene concentration; 7, performing correlation analysis; and 8, calculating the biological disturbance diffusion coefficient. The method has the advantages that 1, the fluorescent sand can be used for representing the vertical, transverse and mixed migration of phenanthrene; and 2, the biological disturbance diffusion coefficient is calcualted. The method is mainly used for exploring the migration of PAHs in the bottom mud of the rice-crab co-cropping farmland in the bottom mud phase by utilizing a fluorescent sand particle tracing method.

Description

technical field [0001] The invention relates to a method for revealing the migration mechanism of PAHs in bottom mud phase by using fluorescent sand particle tracing method. Background technique [0002] In the rice-crab co-cropping system, crab bioturbation significantly affects the migration of sediment particles, causing the upper layer of sediment to enter the lower layer, and the lower layer is transported to the upper layer, forming a complex migration process. Since PAHs are mainly adsorbed on sediment particles, PAHs in sediment migrate with the migration of sediment particles, eventually leading to the formation of "sink" and "source" of sediment PAHs: PAHs on the surface of sediment migrate to deep layers and are buried in The bottom of the sediment becomes historical pollutants, and PAHs "sink" is formed; the PAHs buried in the bottom of the sediment are transported to the surface layer, and then released to the water body, and the "source" of PAHs is formed; it c...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N15/10G01N21/64
CPCG01N33/24G01N15/10G01N21/6456G01N2015/1022Y02A40/81
Inventor孙楠刘靳于士杰蔡振兴杨安培朱广雷刘爽
OwnerNORTHEAST AGRICULTURAL UNIVERSITY