Purification of acidic waste by hydrogen sulfide treatment
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I want to use hydrogen sulfide to treat and purify the acidic waste without introducing sodium ions, allowing for partial reuse of the water. Which sea friend has experience with using hydrogen sulfide to treat and purify acidic wastewater? Please share your insights, thank you!
It is being done in Changsha, Zhejiang, using liquid sulfur and organically cracked hydrogen
Is it to produce hydrogen sulfide, or to use the produced hydrogen sulfide to treat spent acid?
Not feasible; the solubility is too low, it’s too dangerous
Several companies have conducted experiments. The first industrial application at Yuanqu Smelting Plant yielded good results, but there were difficulties during the production of hydrogen sulfide. Jincheng Jintong is under construction; results are awaited for verification.
Several companies have conducted experiments. The first industrial application at Yuanqu Smelting Plant yielded good results, but there were difficulties during the production of hydrogen sulfide. Jincheng Jintong is under construction; results are awaited for verification.
Several companies have conducted experiments. The first industrial application at Yuanqu Smelting Plant yielded good results, but there were difficulties during the production of hydrogen sulfide. Jincheng Jintong is under construction; results are awaited for verification.
Copper smelting in Zijin, Fujian, produces hydrogen sulfide by reacting sodium sulfide with acid.
Hydrogen sulfide is first prepared, and then used to treat heavy metals in acidic waste; Zijin is currently using this method, which was developed by a manufacturer in Changsha
Thank you all for your attention; I’ll go and take a look there tomorrow.
The mechanism by which hydrogen sulfide and sodium sulfide are used to treat acidic wastewater for removing copper and arsenic is the same; however, hydrogen sulfide does not introduce sodium salts. Nevertheless, fluoride and chlorine accumulate, and eventually some water still has to be discharged. If removing fluoride and chlorine is also taken into account, the high costs are beyond the bearing capacity of most companies. The key to treating acidic waste with hydrogen sulfide lies in safety; the safe production, storage, and use of hydrogen sulfide are all major issues. There are three common methods for producing hydrogen sulfide: 1. Sodium sulfide + sulfuric acid; in Zijin, Fujian, during the testing period ； 2. Ammonia is decomposed to produce hydrogen; hydrogen combined with sulfur burns to produce hydrogen sulfide. The hazardous factors involved are well known to those who work in safety-related fields ； 3. Methanol is cracked to produce hydrogen; hydrogen plus sulfur is used to produce hydrogen sulfide. The rest is the same as in 2. Beifang Copper Industry was designed to treat acidic waste with hydrogen sulfide; reportedly it has now switched to sodium sulfide. The reason for this is obvious, and anyone in the industry can figure it out.