Method for removing S < 2-> in red mud leachate

• Main Authors: WANG HAIFENG, NIE YAWEN, LUO YONGFEI, WANG JIAWEI, XIE HAIFENG
• Format: Patent
• Language: Chinese; English
• Published: 02.01.2024
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a method for removing S < 2-> in red mud leachate, and belongs to the technical field of wastewater treatment. According to the method, firstly, the ferrous compound is adopted for oxidizing the red mud leachate, then the removal effect of sulfides is improved through aeration treatment, meanwhile, the desulfurization effect of the red mud leachate is enhanced through manganese salt, and the sulfides in the red mud leachate are removed through the flocculating agent and the clarification treatment step. In addition, the method is simple and easy to implement, and the medicament cost is low. After the red mud leachate is treated by the method disclosed by the invention, COD (Chemical Oxygen Demand) in the obtained effluent is less than 30mg/L, and sulfide is less than 0.5 mg/L, so that the effluent can meet the secondary standard in Integrated Wastewater Discharge Standard of the People's Republic of China (GB8978-1996) and is basically close to the primary standard. 本发明提供了一种去除赤泥渗滤液中S2-的