Water quality heavy metal multi-parameter online monitoring instrument

Abstract

The invention discloses a water quality heavy metal multi-parameter online monitoring instrument which comprises an online sample digestion system, an online sample detection system and a measurement and control system. The water quality heavy metal multi-parameter online monitoring instrument disclosed by the invention can realize automatic online monitoring of content of heavy metals such as mercury, lead, cadmium, chromium and arsenic in water, can be widely applied to the fields of surface water quality pollution monitoring, seawater pollution monitoring, up-to-standard release monitoring of industrial wastewater treatment and municipal sewage treatment and the like and has the advantages of high functional expansibility, wide measurement range and low cost.

Description

Technical field [0001] The invention is a kind of water quality metal multi -parameter online monitoring instrument involving the field of water quality monitoring instruments. Background technique [0002] The five types of heavy metal pollution of heavy metals, especially mercury, lead, cadmium, chromium, and arsenic, which will directly affect the safety of the water ecological environment and the safety of drinking water sources, cause the aquatic creature, or be rich in aquatic creatures.In the body, the food chain is seriously endangered through the food chain. Therefore, heavy metals are the water quality parameters that need to be strictly monitored. In recent years, the water quality heavy metal pollution incident has been frequent, which has been highly valued by the Chinese government. The Minister of Environmental Protection Zhou ShengxianIt has been said that the goal of the "Twelfth Five -Year Plan" heavy metal pollution prevention is to establish a relatively compr...

AI Technical Summary

Problems solved by technology

However, there is a lot of heavy metal pollution, such as mercury, lead, chromium, cadmium, arsenic, copper, manganese, iron, etc. At present, environmental protection, water conservancy and other departments have to use multiple electrochemical sensor probes in order to comprehensively monitor heavy metal pollution and comprehensively evaluate water quality changes Integrated instruments, multi-colorimetric analysis module integrated instruments, and even the combination of multiple single-parameter water quality monitoring instruments are three technical approaches to realize multi-parameter real-time monitoring of heavy metals in water quality. The expansion of parameter monitoring and the flexibility of on-site emergency use are two important user needs and technical requirements, and the cost of use is relatively high. For example, multi-colorimetric analysis module integrated instruments generally integrate 3-4 modules at most, otherwise the instrument The cost is too high (generally to detect one more water quality parameter, and the price of each additional colorimetric analysis module will increase by 70,000 to 100,000 yuan), making it difficult for users to accept, and each additional colorimetric analysis module will increase the volume of the instrument

Although the water quality heavy metal monitoring instrument based on anodic stripping voltammetry can detect multiple heavy metal parameters, the detection limit of this type of instrument is not high because the sensing electrode is in contact with water, in order to ensure that the electrode is not corroded by sewage and prolong the service life of the instrument. , the measurement range is not large, generally it can only monitor surface water pollution of class I and class II, and cannot be used for discharge monitoring of industrial wastewater treatment and urban sewage treatment, nor can it be used for sudden heavy metal pollution monitoring of surface water quality

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