We all know that the Yellow River is the mother river of our country and one of the important water resources, but due to the use of the Yellow River water body for thousands of years, coupled with the impact of human activities, the Yellow River has been polluted, and the water quality has been greatly affected, thus posing a serious threat to the balance and stability of the Yellow River ecosystem. At this time, the Yellow River water should be prepared regularlyWater quality monitoringIt is an important part of helping to understand the degree of water pollution and water quality. Next, we will discuss the technical issues of monitoring COD in the Yellow River water body.
There are many ways to monitor COD levels in water bodies, including chemical analysis. By measuring the content of chemical elements in the water body, the degree of pollution in the water body is reflected. Chemical analysis methods include absorption method, titration method, flotation method, potassium dichromate high-temperature digestion, colorimetric determination, ultraviolet method, etc. And in the COD monitoring of water bodies,Water qualityMonitoring equipmentIncluding laboratory measurements, automatic monitoring instruments, etc. For the measurement and analysis of the water quality of the Yellow River, it is considered more appropriate to choose the automatic water quality monitoring equipment.
oneApplication of COD monitoring technology in the Yellow RiverIt is of great value:
1.It provides a scientific basis for the ecological protection of the Yellow River. By monitoring the COD value of the Yellow River, we can understand the pollution degree and water quality of the water body, so as to provide a basis for formulating scientific ecological protection policies.
2.The environmental governance of the Yellow River provides a reference. By analyzing the COD value of the Yellow River water body, we can understand the types and contents of pollutant substances in the water body, so as to provide a scientific basis for pollution control.
3.Agricultural water use is a reference. By monitoring the COD value of the Yellow River, we can understand the impact of pollutants in the water body on agricultural water use, so as to provide a scientific basis for optimizing agricultural water use.
II. II. IICOD monitoring technology of the Yellow River water bodyDiscuss
Although some progress has been made in COD monitoring technology in the Yellow River water body, many challenges remain. Due to the high degree of pollution in the Yellow River water body, it is necessary to use chemical analysis instruments with high sensitivity to ensure the accuracy of the measurement results. There are also many types of pollutants in the Yellow River, and different types of pollutants need to be separated to obtain accurate measurement results.
In fact, when it comes to COD monitoring in the Yellow River, it is a very important technology, which can provide a scientific basis for the ecological protection and environmental management of the Yellow River. As a water quality monitor manufacturer, Hangzhou Moody's has developed two methods for determining COD content in water bodies
1.Potassium dichromate high-temperature digestion, colorimetric determination;
COD-8000 is reduced to CR ( ) by the mixed solution formed by water sample, potassium dichromate, silver sulfate (as a catalyst to make the oxidation of linear aliphatic compounds more sufficient) and concentrated sulfuric acid in the high temperature and high pressure environment, so that the color of the mixture solution changes, and the degree of change of the solution corresponds to the solubility of the measured water sample COD (chemical oxygen demand). Chloride ions in water samples are the main interfering substance, and the COD-8000 COD (Chemical Oxygen Demand)** analyzer eliminates chloride interference by adding chloride ions from mercuric chloride complexed water samples.
2.The UV method is also known as the ultraviolet method:
CODUV-8000 enables fast, accurate, and cost-effective determination of COD** in water samples. The basic measuring principle of the instrument is based on the absorption of ultraviolet light by organic matter in the wastewater. Organics containing conjugated double bonds or polycyclic aromatic hydrocarbons have an absorption effect on ultraviolet light when dissolved in water. Therefore, by measuring the degree to which these organics absorb UV light, we can assess the extent to which the water is polluted by these organics. Applications include drinking water, surface water, industrial process water, sewage treatment and other fields. It can be used to continuously monitor the degree of organic pollution imported from raw water and sewage plants, the removal rate of organic matter in the treatment process, and the degree of organic pollution in industrial circulating water.