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Evaluation method of quality of combined pollution farmland soil

An evaluation method and composite pollution technology, applied in the field of monitoring and evaluation of farmland soil environment, can solve problems such as difficulty in reflecting soil pollution and fertility, and achieve the effect of improving scientificity, strengthening soil environmental quality, and ensuring risk assessment.

Active Publication Date: 2018-01-09
山西省环境科学研究院
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Problems solved by technology

[0005] The present invention provides a method for evaluating the soil quality of complex polluted farmland in order to solve the existing technical problem that it is difficult to reflect the real soil pollution and fertility by establishing soil environmental quality evaluation indicators only for a certain factor

Method used

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  • Evaluation method of quality of combined pollution farmland soil
  • Evaluation method of quality of combined pollution farmland soil
  • Evaluation method of quality of combined pollution farmland soil

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Experimental program
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Embodiment 1

[0050] first step, such as figure 1 As shown, the soil samples for testing were collected near the three sewage irrigation canals in Xiaodian sewage irrigation area of ​​Taiyuan. 35 sampling points were arranged, and the surface soil of 0-10cm was taken. At the same time, soil samples from the Daoba area of ​​the non-sewage irrigation area were taken as the monitoring background value, which was recorded as CK.

[0051] In the second step, the content determination of the fertility index and the pollution index is carried out on the collected soil sample;

[0052] Pollution indicators are: ∑PAHs, total arsenic (As), total mercury (Hg), total cadmium (Cd), total lead (Pb), total chromium (Cr), total copper (Cu), and total zinc (Zn);

[0053] Fertility indicators are: organic matter (SOM), total phosphorus (TP), available phosphorus (AvP), total potassium (TK), available potassium (AvK), total nitrogen (TN), alkaline nitrogen (AvN), pH, conductivity , cation exchange capacity....

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Abstract

The invention relates to the technical field of monitoring and evaluation of a farmland soil environment, in particular to an evaluation method of quality of combined pollution farmland soil. The method comprises the steps of collecting a sample, determining a pollution index and a fertility index of the sample, performing principal component analysis on determination results, making judgment, performing pollution classvevaluation and then performing fertility grade evaluation under different pollution classes if the influence of a pollution factor is higher than that of a nutrient fertility factor, and performing the fertility grade evaluation and then performing the pollution class evaluation under different fertility grades if the influence of the nutrient fertility factor is higher than that of the pollution factor. According to the step-by-step evaluation method of the quality of the combined pollution farmland soil, an analytical result can visually show nutrient fertility characteristics of the soil of all combined pollution degrees; the scientificity of the evaluation of the quality of the combined pollution farmland soil is improved; the quality of the soil environment isimproved; and the method has important significance on the risk assessment of the polluted soil and guarantee of diet safety of people.

Description

technical field [0001] The invention relates to the technical field of monitoring and evaluation of farmland soil environment, in particular to a method for evaluating the quality of compound polluted farmland soil. Background technique [0002] As the basis of agricultural production, farmland soil is the necessary living environment for plants, especially crops, and provides human beings with the necessary food and raw materials. In order to solve the problem of agricultural irrigation water, sewage has become the main water source for agricultural irrigation in the suburbs of cities and towns in northern my country where the situation of agricultural water use is tense. However, due to the complex composition of irrigation water, the overall level of sewage treatment in my country is currently low, and direct use for irrigation of crops may cause pollution to soil, groundwater and crops. Pollutants continue to accumulate, migrate and transform in the environment, leading...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 赵颖党晋华韩文辉张丽
Owner 山西省环境科学研究院
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