(1) Treatment and waste water containing heavy metals Acid (2) ferrous sulfate containing heavy metals Acid Waste Water Treatment The metal in the wastewater is removed by using ferrous salt, the wastewater is mixed with the iron compound, and then alkali is added for neutralization, and oxidation is performed with air to complete the reaction. As a result, an iron salt precipitate, a complex salt of a hydroxide precipitate, and a heavy metal are produced, and the precipitate is separated from the solution by filtration and magnetic force. (3) Reverse osmosis treatment of acidic wastewater containing heavy metals Recently, foreign countries have successfully used reverse osmosis for the treatment of heavy metal acid wastewater in mines. Heavy metals: Cu, Pb, Zn, Ni, Cd and other removal rates of 98% or more, pH value of about 7. (4) Other methods for treating acidic wastewater containing heavy metals Other methods include: ion exchange, ultrafiltration membrane charge, electrodialysis, electrodeposition method, a synthetic polymeric adsorbent activated carbon method (particularly suitable for removing heavy metal complex), sodium borohydride reduction and U.S. recently launched The use of a starch salting agent is a method for treating heavy metal acidic wastewater in mines. Spinneret Assembly,High Hardness Spinneret Assembly,Stainless Steel Spinneret Assembly,High-Accuracy Spinneret Assembly Changzhou Jier Precision Machinery Manufacturing Co., Ltd. , https://www.jier-spinneret.com