In the current context of continuously improving environmental management levels and increasingly stringent requirements, many fields that utilize cyanides generate a significant amount of harmful waste liquid. If not properly utilized, it can pose risks to human health. To achieve the dual goals of non - waste and non - harm, Recycling methods can be adopted to address this issue.
Acidification Method
The main principle of this method is to add sulfuric acid to cyanide - containing wastewater such as Sodium cyanide wastewater and adjust the pH to around 1.5. This converts CN - into HCN. Since the boiling point of HCN is extremely low, only 26.5℃, it can escape from the solution at room temperature. The escaped HCN gas is introduced into an absorber and absorbed by an alkaline solution (sodium hydroxide or calcium hydroxide solution). As a result, a 20% - 30% cyanide solution is obtained, which can be recycled.
Ion - Exchange Method
Anion - exchange resins have a strong affinity for various metal - cyanide complex ions in cyanide - containing wastewater. Through the processes of adsorption and desorption, Cyanides and valuable metals in the wastewater can be removed. The advantage of this method is that the purified water quality is good and stable. However, anion - exchange resins have small particle sizes and insufficient mechanical strength. Moreover, the process is relatively complex, with high operation difficulty and high costs.
Activated Carbon Adsorption Method
Activated carbon has a rich microporous structure and surface hydrophobicity, and it has an extremely strong affinity for toxic substances in water. Therefore, the activated carbon adsorption method has always been one of the most effective methods for removing low - concentration toxic substances in water. The adsorption effect of activated carbon mainly depends on its numerous internal pores and large specific surface area.
To ensure that cyanides such as Sodium Cyanide have not leaked, inspectors regularly test the water quality to determine the scope of cyanide contamination. If necessary, the warning area is expanded. Both inspectors and on - site treatment personnel should wear rubber oil - resistant protective gloves.
In conclusion, proper treatment and recycling of Cyanide waste liquid are crucial for environmental protection and resource conservation. By implementing these methods and ensuring strict monitoring, we can minimize the negative impacts of cyanide - containing waste on the environment and human health.
- Random Content
- Hot content
- Hot review content
- Isobutyl vinyl ether 98% high purity certified Professional producer
- Food grade Antioxidant T501 Antioxidant 264 Antioxidant BHT 99.5%
- Benzonitrile
- Zinc sulfate monohydrate 98% Industrial & Feed Grade
- Copper Sulfate Monohydrate (CuSO4-H2O) Powder (Cu:34% Min)
- Industrial Sodium Nitrite 98.5%
- Ethylene carbonate
- 1Discounted Sodium Cyanide (CAS: 143-33-9) for Mining - High Quality & Competitive Pricing
- 2Sodium Cyanide 98.3% CAS 143-33-9 NaCN gold dressing agent Essential for Mining Chemical Industries
- 3China's New Regulations on Sodium Cyanide Exports and Guidance for International Buyers
- 4Sodium Cyanide (CAS: 143-33-9) End user certificate (Chinese and English version)
- 5International Cyanide（Sodium cyanide） Management Code - Gold Mine Acceptance Standards
- 6China factory Sulfuric Acid 98%
- 7Anhydrous Oxalic acid 99.6% Industrial Grade
- 1Sodium Cyanide 98.3% CAS 143-33-9 NaCN gold dressing agent Essential for Mining Chemical Industries
- 2High Purity · Stable Performance · Higher Recovery — sodium cyanide for modern gold leaching
- 3Nutritional Supplements Food Addictive Sarcosine 99% min
- 4Sodium Cyanide Import Regulations & Compliance – Ensuring Safe and Compliant Importation in Peru
- 5United Chemical's Research Team Demonstrates Authority Through Data-Driven Insights
- 6AuCyan™ High-Performance Sodium Cyanide | 98.3% Purity for Global Gold Mining
- 7Digital Electronic Detonator（Delay time 0~ 16000ms）
Online message consultation
Add comment: