Cadmium is a kind of heavy metal which has significant harm to environment and biological health. Its use in industrial production, battery manufacturing and metal smelting leads to increasingly serious pollution problems. Because of its high efficiency and rapid separation ability, the combined extraction centrifugal extractor has shown a good application prospect in the extraction of cadmium from wastewater.

Environmental characteristics of cadmium

Cadmium is mainly found in water bodies in the form of cadmium ion (Cd² +). Its toxicity not only affects the growth and reproduction of aquatic organisms, but also poses a serious threat to human health through the food chain. The accumulation of cadmium may lead to many diseases such as kidney and bone, so the effective removal of cadmium in wastewater is an important task of environmental governance.

Separation mechanism of combined extraction centrifugal extractor

The combined extraction centrifugal extractor separates cadmium ions from other components in wastewater by centrifugal force generated by high-speed rotation. Its working steps mainly include:

1. Waste water feeding: the waste water containing cadmium is injected into the centrifugal extractor.

2. Centrifugal separation: When rotating at high speed, cadmium ion settles to the bottom of the equipment due to its relatively high density.

3. Collection of precipitation: the cadmium sediment after settlement can be collected and subsequent treatment.

Optimized extraction conditions

In order to improve the extraction efficiency of cadmium, the following key parameters need to be optimized:

1. Centrifugal speed: Appropriate increase of centrifugal speed can accelerate the deposition of cadmium, usually recommended in the range of 3000-6000 rpm.

2. Treatment time: Extending the treatment time can improve the extraction rate of cadmium, and the recommended time is 20-30 minutes.

3. pH regulation: Controlling the pH value of the wastewater in the acidic range (pH 4-6) can further improve the precipitation effect of cadmium.

Follow-up treatment and resource recovery of cadmium

The cadmium precipitates after extraction can be treated by roasting or acid leaching to recover cadmium resources. The recycling of cadmium can not only reduce environmental pollution, but also realize certain economic benefits.

The application of combined extraction centrifugal extractor to extract cadmium from wastewater provides an efficient and convenient solution for cadmium pollution control. With the continuous progress of technology, the application prospect of this technology in the field of environmental protection will be broader.