Name of soil testing company 。 Soil pollution is generally divided into weapon pollutants and organic pollutants. Weapons pollutants mainly include acids, alkalis, heavy metals, salts, radioactive elements cesium, strontium compounds, arsenic, selenium, fluoride compounds, etc. Organic pollutants mainly include organic pesticides, phenol, cyanide, petroleum, synthetic detergent, benzopyrene, harmful microorganisms caused by urban sewage, sludge, fertilizer, etc. There are too many harmful substances in the soil. After exceeding the self purification capacity of the soil, the composition, structure and function of the soil will change, the microbial activity will be inhibited, and harmful substances or decomposition products will accumulate in the soil and be indirectly absorbed by the soil plant body or the soil water body.

Name of soil testing company: There are four kinds of soil pollutants as follows:

Chemical pollutants. It includes inorganic pollutants and organic pollutants. The former, such as heavy metals such as mercury, cadmium, lead and arsenic, excessive nitrogen and phosphorus phytonutrients, oxides and sulfides; The latter includes various chemical pesticides, petroleum and its decomposition products, other organic compounds, etc

Physical pollutants. Refers to those from tailings, waste rock, fly ash, industrial waste and other factories and mines

　　 Name of soil testing company: solid waste

Biological pollutants. It refers to waste water, wastes, manure, etc. discharged from urban garbage and sanitary facilities (including hospitals) with various pathogenic bacteria

Radioactive contaminants. It mainly exists in areas where nuclear raw materials are mined and atmospheric nuclear explosions occur, and is dominated by radioactive elements such as strontium and cesium that have a long life in soil.

　　1、 Name of soil testing company: Industrial sewage

Irrigation of farmland with untreated or substandard industrial sewage is the main way for pollutants to enter the soil, thus forming a pollution belt on both sides of the irrigation canal system. It is closed and limited pollution.

　　2、 Name of soil testing company: acid rain

SO2, NO and other harmful gases discharged from industry react in the atmosphere to form acid rain, which enters the soil as natural precipitation and causes soil acidification. The metal oxide dust discharged from the metallurgical chimney enters the soil in the form of dust fall under the action of gravity, forming a spot pollution with a radius of 2 km to 3 km around the polluting factory

　　3、 Name of soil testing company: Exhaust gas emission

Tetraethoxylead, an explosion-proof agent added to gasoline, pollutes soil with exhaust gas, and often forms obvious lead pollution zones on both sides of roads with high driving frequency.

　　4、 Name of soil testing company: sediment

The soil in the deposition site is directly polluted, and the secondary diffusion under natural conditions forms a larger range of pollution.

　　5、 Name of soil testing company: Agricultural pollution

　　 Name of soil testing company: Openness in agricultural areas

Soil pollution is generally caused by the transformation of air and water pollution, which can act alone, overlap and cross with each other, belonging to the point pollution category. With the modernization of agriculture, especially the improvement of the level of agricultural chemistry, a large number of chemical fertilizers and pesticides are scattered in the environment, and the chances of soil being contaminated by astigmatism are increasing, and the degree of astigmatism is becoming more and more serious. Under the influence of water and soil loss and wind erosion, the pollution area continues to expand. According to the nature of pollutants, soil pollutants are divided into inorganic substances and organic substances. Inorganics mainly include heavy metals such as mercury, chromium, lead, copper, zinc, and nonmetals such as arsenic and selenium; Organic substances mainly include phenol, organic pesticide, oil, benzopyrene, detergent, etc. These chemical pollutants are mainly carried into the soil and accumulated through sewage, waste gas, solid waste, pesticides and fertilizers.

　　1. Name of soil testing company: Sewage discharge

Because domestic sewage and industrial wastewater contain nutrients required by many plants, such as nitrogen, phosphorus, potassium, etc., reasonable use of sewage to irrigate farmland generally has an effect of increasing production. However, the sewage contains heavy metals, phenol, cyanide and other toxic and harmful substances. If the sewage is directly used for farmland irrigation without necessary treatment, the toxic and harmful substances in the sewage will be transported to farmland and pollute the soil. For example, industrial wastewater from smelting, electroplating, fuel, mercury and other industries will cause heavy metal pollution such as cadmium, mercury, chromium and copper; Petrochemical, fertilizer, pesticide and other industrial wastewater will cause the pollution of phenol, trichloroacetaldehyde, pesticide and other organic substances.

　　2. Name of soil testing company: waste gas

The harmful gas in the atmosphere is mainly the toxic waste gas discharged by industry, which has a large pollution area and causes serious pollution to the soil. There are two kinds of industrial waste gas pollution. Sulfur dioxide, fluoride, ozone, nitrogen oxides, hydrocarbon compounds and other gas pollution; Solid particles such as dust and smoke, and liquid particles such as smoke and fog spread pollution into the soil through sedimentation and precipitation, causing pollution. For example, the waste gas from non-ferrous metal smelters contains chromium, lead, copper, cadmium and other heavy metals, which will pollute the nearby soil; The factories producing phosphate fertilizer and fluoride will bring dust pollution and fluoride pollution to the nearby soil.

　　3. Name of soil testing company: Chemical fertilizer

Applying chemical fertilizer is an important measure to increase agricultural production, but unreasonable use will cause soil pollution. Long term and large use of nitrogen fertilizer will destroy the soil structure, harden the soil, deteriorate the biological properties, and affect the yield and quality of crops. Excessive use of nitrate nitrogen fertilizer, feed crops contain a large amount of nitrate, which hinders the transmission of oxygen in livestock, leading to disease and serious death.

　　4. Name of soil testing company: pesticides

Pesticides can prevent and control diseases, insects and weeds. Proper use can ensure crop production, but they are very harmful soil pollutants. Improper application will cause soil pollution. About half of the pesticides (powders, wettable powders, emulsions, etc.) sprayed on crops are sprayed on farmland except some are absorbed by plants or escaped into the atmosphere. These pesticides and pesticides directly sprayed on farmland (such as mixed disinfectants, underground pest fumigants, pesticides, etc.) are pesticides in farmland soil. Crops absorb pesticides from the soil, accumulate them in roots, stems, leaves, fruits and seeds, and endanger the health of human beings and livestock through food and feed. In addition, when pesticides are used to kill insects and prevent diseases, they can also harm microorganisms, insects and birds that are helpful to agriculture, damage ecosystems and cause indirect losses to crops.

　　5. Name of soil testing company: Solid pollution

Industrial waste and urban garbage are solid pollutants in soil. For example, various kinds of agricultural plastic films are widely used as the covers of plastic greenhouses and mulch films. The management and recycling are not sufficient, and a large number of residual film fragments are scattered in the fields, sometimes causing "white pollution" of farmland. This kind of solid pollutant is not easy to evaporate, volatilize, and decompose by soil microorganisms. It is a pollutant that has remained in the soil for a long time.

Name of soil testing company: Name of soil testing company

　　 Name of soil testing company: Soil quality inspection refers to the determination of the representative value of soil environmental quality to determine the change trend of environmental quality or pollution degree. General soil detection can be divided into regional soil scenery, farmland soil environment, construction project soil environmental impact assessment, soil pollution accident and other types of detection, urbanization and industrialization induction detection.

　　 Name of soil testing company: With precision evaluation, collect the soil, clarify the content of organic pollutants contained in the soil, and analyze and determine the samples. Mineral resources development, metal processing and smelting, chemical production, and rational use of pesticides and fertilizers are all serious disaster areas of soil pollution. The plowland pollution caused by heavy metals such as cadmium and arsenic is particularly outstanding, and the cold chain transportation team of soil samples is particularly important.

　　 Name of soil testing company: The refrigerated transportation of soil samples needs to use a temperature recorder for archiving and transportation throughout the whole process, and the temperature sensor head needs to be stored in the center of the refrigerated transportation image, instead of covering items such as ice. The transportation process is comparable to the transportation of delicate plants such as strawberries and cherries. Some soils need to be tested for at least 45 pollutants. The normal properties of soil samples can only be ensured in the cold chain transportation, and various substances will not deteriorate. One time hazard will affect the soil for a long time.

　　 Name of soil testing company: The soil pollution has the characteristics of concealment, hysteresis and accumulation. The sampling method is also changing from some items sent to the laboratory to relevant instruments and equipment for on-site sampling and testing. Only when detailed data are obtained, can the corresponding prevention measures be taken and the soil remediation effect be monitored later. Spectrophotometer, inductively coupled plasma emission spectrometer, atomic fluorescence spectrometer, microwave digestion instrument, Soxhlet extractor.

Name of soil testing company: How much do you know about the soil testing company

　　 Name of soil testing company: Soil quality inspection refers to the determination of representative value of soil environmental quality to determine the change trend of environmental quality or pollution degree. General soil detection can be divided into regional soil matching, farmland soil environment, construction project soil environmental impact assessment, soil pollution accident and other types of detection, urbanization and industrialization inductive detection.

　　 Name of soil testing company: The precision evaluation was carried out, and the soil was collected to determine the content of organic pollutants in the soil for sample analysis and determination. Mineral resources development, metal processing and smelting, chemical production, and rational use of pesticides and fertilizers are all serious disaster areas of soil pollution. The pollution of heavy metals such as cadmium and arsenic on debris is particularly prominent, and the soil samples of the cold chain transport team of soil samples are particularly important.

　　 Name of soil testing company: The refrigerated transportation needs of soil samples are often archived and transported with temperature recorders. The temperature sensor head needs to be kept in the central position of the refrigerated transport image, and cannot compress the ice. The handling process is comparable to the handling of delicate plants such as strawberries and cherries. Some soils need to be tested for at least 45 pollutants. Soil samples must be transported in the cold chain to ensure normal properties, and various substances will not deteriorate. One hazard will affect the soil for a long time.

　　 Name of soil testing company: Soil pollution is insidious, hysteretic and cumulative, and the sampling method can only be taken by switching to relevant instruments and equipment for on-site sampling and detection in some projects delivered by the laboratory, and obtaining detailed data. In the later stage, the soil remediation effect can be monitored by spectrophotometer, inductively coupled plasma luminescence spectrometer, atomic fluorescence spectrometer Microwave decomposer, Soxhlet extractor.