Chemical laboratories are important places for teaching and research, and the generation of wastewater is an inevitable problem in chemical laboratories. Wastewater contains inorganic ions, organic matter, acids and bases, and other chemical substances. Without appropriate treatment equipment, it will have a serious impact on the environment and health. This article will introduce the types and functions of wastewater treatment equipment in university chemistry laboratories.

1、 Heavy metal wastewater treatment equipment in chemical laboratories may contain large amounts of toxic heavy metals such as chromium, lead, mercury, etc. These heavy metals can cause significant harm to the environment and human health. Therefore, university chemistry laboratories need to use heavy metal wastewater treatment equipment for treatment. The common treatment methods are electrochemical method, ion exchange method, chemical precipitation method, etc.

1. Electrochemical method is a method of treatment that utilizes the principles of electrochemistry. By electrolysis or current regulation, heavy metal ions in wastewater containing toxic metal ions can be reduced or precipitated to the bottom, thereby achieving the goal of wastewater purification.

2. Ion exchange method is a separation method. Using ion exchange resin, toxic metal ions in wastewater are exchanged with resin ions through ion exchange, thereby separating toxic metal ions from wastewater and achieving purification purposes.

3. Chemical precipitation method is a method of purifying wastewater by adding chemical precipitants to precipitate metal ions in the wastewater, filtering and separating the waste.

2、 The chemical laboratory of acid-base wastewater treatment equipment generates wastewater that contains a large amount of acidic and alkaline substances, which can cause great harm to the environment and equipment. There are mainly two types of acid-base wastewater treatment equipment: acid-base waste liquid neutralization device and chemical neutralization device.

1. The acid-base waste neutralization device is a device that neutralizes acidic and alkaline substances in acid-base waste liquids. Generally, both acidic and alkaline waste liquids are transported simultaneously, and acid-base balance is achieved through neutralization reactions to achieve neutralization treatment of acidic and alkaline waste liquids.

2. Chemical neutralization device is a device that adds alkaline chemical reagents to acidic wastewater for neutralization reaction. Generally, automatic control systems are used to adjust the pH value of wastewater, thereby achieving the treatment of wastewater.

3、 Organic pollution in wastewater treatment equipment is an important component of chemical laboratory wastewater. Organic pollutants have high content and high toxicity. If not treated properly, they will pose a threat to the environment and human health. This type of wastewater needs to be treated using methods such as particle activated carbon adsorption, biological methods, ozone oxidation, etc.

1. Particle activated carbon adsorption is a physical adsorption method. By the affinity between magnetic impurities in wastewater and granular activated carbon, organic pollutants in wastewater are adsorbed on the surface of granular activated carbon, achieving purification.

2. Biological method is the process of treating wastewater by degrading and transforming organic pollutants through microorganisms. By using devices such as contact oxidation tanks and active tanks, organic pollutants in wastewater can be degraded to achieve purification.

3. Ozone oxidation is a treatment method that involves introducing ozone gas into an ozone oxidation reactor to react with organic pollutants in wastewater, thereby degrading the organic pollutants.

In summary, the wastewater treatment equipment in university chemistry laboratories involves multiple aspects such as heavy metal wastewater treatment equipment, acid-base waste neutralization devices, and biological chemical neutralization devices. Different wastewater treatment equipment plays an important role in different situations. In the future, with the continuous development of technology, we have reason to believe that chemical laboratory wastewater treatment equipment will become increasingly advanced, inexpensive, and able to achieve both environmental protection and resource reuse.