An online monitoring, early warning and real-time processing system for farmland heavy metal pollution

Abstract

The invention provides an online monitoring, early warning and real-time processing system for farmland heavy metal pollution. The system comprises a heavy metal online monitoring and early warning subsystem, a heavy metal real-time processing device and a control processing device; the heavy metal online monitoring and early warning subsystem and the heavy metal real-time processing device are respectively connected with the control processing device; the heavy metal online monitoring and early warning subsystem is used for monitoring heavy metal concatenation of soil and sending an early warning signal according to the severity of the soil pollution; the control processing device is used for receiving and analyzing the early warning signal and sending a control command; the heavy metal real-time processing device is used for receiving the control command and performing adsorbing treatment on the heavy metals.

Description

technical field [0001] The invention relates to the technical field of heavy metal monitoring, in particular to an on-line monitoring, early warning and real-time processing system for farmland heavy metal pollution. Background technique [0002] In related technologies, heavy metal detection methods mainly include mass spectrometry, atomic spectroscopy, ultraviolet-visible spectrophotometry, electrochemical analysis, and the like. Mass spectrometry is a method in which moving ions are separated according to the mass-to-nucleus ratio by electric and magnetic fields for detection. The disadvantages are that the cost of the instrument is high, the pretreatment process is cumbersome, and it is difficult to realize the automation of the instrument. Atomic spectrometry can effectively analyze the content of heavy metals in samples, but the sample pretreatment is complicated and the analysis time is long. Ultraviolet-visible absorption spectrophotometry is a method that uses a m...

AI Technical Summary

Problems solved by technology

The disadvantages are that the cost of the instrument is high, the pretreatment process is cumbersome, and it is difficult to automate the instrument

The leaching method has a better effect on the treatment of heavy metal pollution, and is more suitable for light soil, but its investment is large, and it is easy to cause soil nutrient loss and groundwater pollution.

The electrothermal repair method is to heat the soil to heat up the harmful pollutants and collect them uniformly. It is generally used to deal with volatile harmful pollutants. The disadvantage is that this repair technology will destroy the organic matter and structural water in the soil.

The treatment effect and cost of adding soil conditioners are moderate, and it is suitable for soils that are not seriously polluted, but heavy metals may be reactivated

The pump-out treatment method is an in-situ decontamination method suitable for deep soil or aquifer pollution. The treatment agent is injected into the soil from the injection well, so that the pollutants adsorbed and fixed on the soil particles are decomposed and released with the treatment liquid. The lower part of the soil is moved, and then the treatment liquid containing pollutants is pumped up through the pumping well at the other end for treatment, but the treatment process consumes a lot of water, and some treatment agents themselves will also cause pollution

In addition, pumping out treatment is difficult to ensure full contact between pollutants and treatment agents, and it is also difficult to determine the completeness of treatment

The bioremediation method uses biological technology to treat polluted soil, and uses biology to reduce heavy metals in the purified soil or reduce the toxicity of heavy metals. This method is easy to operate, but the biomass is low, and it is selective to metals, and it is not suitable for multiple metals. Compound pollution Soil

[0004] The current heavy metal detection method and treatment method are carried out separately, and there are problems such as high cost, cumbersome operation, and complicated process. The operation steps of these operation methods are either tedious and cumbersome, or there are many interference factors, or relatively expensive large-scale analytical instruments are required. , and has high professional skill requirements for operators, most of which can only be completed in the laboratory, which cannot meet the technical requirements of on-site and rapid online detection

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