How to treat cyanide-containing wastewater

We use the sodium hypochlorite method, specifically a two-stage process involving the use of sodium hypochlorite; this is also a relatively conventional approach, with the concentration of ** substances in the effluent remaining below 0.5 mg/.

My eyes were swollen from being exposed to fumes while treating cyanide-containing wastewater. Hydrogen peroxide is still better; it’s an eco-friendly way to remove cyanide. The Fenton method is also feasible.

From an environmental perspective, there’s nothing wrong with destroying it in this way by adding an oxidizing agent. But isn’t cyanide also a resource? Why? Environmental protection is difficult to implement – it just involves spending money. As a result, fake environmental protection practices are rampant everywhere. If one is capable of subtraction rather than addition – that is, of taking things out rather than adding things in – and if dealing with one cubic meter of wastewater results in earning a few dollars instead of losing dozens, then it’s a different situation. This requires technological progress. Of course, this is a special situation that requires special handling.

This post was last edited by yjqin1 on 2015-8-16 at 18:20. There were many acquaintances among the members of that expert group, and their approach was correct. What worries me now is that there will be thunderstorms in the Tianjin area over the next three days. A few days ago, heaven was already being too generous. El Niño has many negative effects (it causes severe droughts in northern China during the summer), but the lack of rain over these past few days has minimized the losses. As the saying goes, if it doesn’t rain for three days during the hot season, there is a mild drought; if it doesn’t rain for ten days, there is a severe drought. In the first ten days, precipitation in Tianjin was less than 3 millimeters. What is produced when metallic sodium reacts with water? What is produced when metallic potassium reacts with water? What is produced when calcium carbide reacts with water? What is formed when calcium silicide reacts with water? What is formed when potassium sulfide reacts with water? Fortunately, the pKa1 of hydrogen sulfide is 7.0 and its pKa2 is 13.0. What is produced when potassium cyanide or sodium cyanide reacts with water? However, the pKa of hydrogen cyanide is 9.2; therefore, when sodium cyanide comes into contact with water, it undergoes intense hydrolysis, resulting in the release of large amounts of hydrogen cyanide. What is produced when triethylaluminum reacts with water? Spontaneous combustion + explosion, especially on a hot day.

Hydrogen peroxide, chlorine, and sodium hypochlorite are all options; I just checked some information. I’ve never encountered such things in practice, so I’m still not sure

The purification cost of low-concentration substances is too high, making it not worth it.

Decyanating agent: sodium hypochlorite. I haven’t actually tried this method; aren’t some electroplating wastewater streams containing cyanide?

I originally thought hydrogen peroxide would be enough, but it turns out there are many other methods. This time, there are indeed environmental protection companies willing to provide free advertising in order to directly support Tianjin, using mobile devices for the treatment process. It’s a shame that our leaders don’t have such an idea, but through this post I still learned something