电解锰渣(EMR)是电解锰金属(EMM)行业的副产品,含有高浓度的潜在污染物,例如NH4-N和可溶性Mn2。这些成分对生态环境构成严重威胁。为了探索准确,高效,EMR的无害化处理方法,这项研究提出了一种低温热化学方法。正交试验设计考察了反应温度的影响,反应时间,生石灰(CaO),碳酸钠(Na2CO3),磷酸钠(Na3PO4)(审阅者#3),锰固化和从EMR中去除氨的耗水量。结果表明,最佳反应条件为反应温度60℃(综述#3),反应时间10min。CaO将Mn2+沉淀为氢氧化锰(Mn(OH)2)(审阅者#3),实现有效的锰固化和氨去除。Na2CO3的添加导致Mn2+形成碳酸锰(MnCO3)(审阅者#3)沉淀,而Na3PO4使Mn2+形成磷酸锰三水合物(Mn3(PO4)2·3H2O)(审阅者#3)。增加的水消耗增强了离子之间的相互作用充足性。在最佳条件下(CaO10%,Na2CO31%,Na3PO40.5%,和80%的用水量),铵离子去除率达到98.5%,可溶性Mn2+的凝固率为99.9%。影响铵离子去除的顺序为CaO>耗水量>Na3PO4>Na2CO3。因此,本研究为EMR的低成本工艺处理和高效无害化处理提供了一种新的方法(综述#3)。
The Electrolytic Manganese Residue (EMR) is a by-product of the electrolytic manganese metal (EMM) industry, containing high concentrations of potential pollutants such as NH4+-N and soluble Mn2+. These components pose a serious threat to the ecological environment. To explore accurate, efficient, and harmless treatment methods for EMR, this
study proposes a low-temperature thermochemical approach. The orthogonal experiment design investigates the effects of reaction temperature, reaction time, quicklime (CaO), sodium carbonate (Na2CO3), sodium phosphate (Na3PO4) (Reviewer #3), and water consumption on manganese solidified and
ammonia removal from EMR. The results indicate that optimal conditions are a reaction temperature of 60 ℃ (Reviewer #3) and a reaction time of 10 min. CaO precipitates Mn2+ as manganese hydroxide (Mn(OH)2) (Reviewer #3), achieving effective manganese solidified and
ammonia removal. The addition of Na2CO3 causes Mn2+ to form manganesecarbonate (MnCO3) (Reviewer #3)precipitate, while Na3PO4 makes Mn2+ form Manganese phosphate trihydrate (Mn3(PO4)2·3H2O) (Reviewer #3). Increased water consumption enhances the interaction adequacy between ions. Under optimal conditions (CaO 10%, Na2CO3 1%, Na3PO4 0.5%, and 80% water consumption), the removal rate of ammonium ions reaches 98.5%, and the solidification rate of soluble Mn2+ is 99.9%. The order of influence on ammonium ion removal is CaO > water consumption > Na3PO4 > Na2CO3. Therefore, this
study provides a new method for low-cost process disposal and efficient harmless treatment of EMR (Reviewer #3).