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污酸是有色金属冶炼中普遍存在的废酸,具有污染物种类多成分复杂、酸度高且最难处理的特点。污酸也是冶炼厂酸性重金属离子废水主要来源,其传统处理工艺产生大量危险废渣且处理成本高。旋流电解技术以可适用范围广且高选择性等特点日益受到重视。本论文利用旋流电解技术处理污酸溶液,研究了初始铜离子浓度对铜砷脱除效果的影响,并同并联循环连续电积脱砷法和控制阴极电势电积法做了比较。结果表明,在初始铜离子浓度为3 g·L~(-1)时,旋流电解6 h时砷脱除率最好(71.42%)。初始铜离子浓度3 g·L~(-1)以内时,砷脱除率随初始铜离子浓度升高而升高;初始铜离子浓度超过3 g·L~(-1)时,初始铜离子浓度升高对砷脱除不利。旋流电解技术可在高电流密度500 A·m~(-2)下进行脱砷,高于并联循环连续电积法的320 A·m~(-2)和控制阴极电势电积法200 A·m~(-2);其渣中铜砷比可达0.65∶1.00,远低于并联循环连续电积法的(1.8~2.8)∶1.0和控制阴极电势电积法的6.6∶1.0,减少了砷渣中铜的含量。
Hoe acid is a common waste acid in non-ferrous metal smelting. It has the characteristics of multi-component pollutants, high acidity and the most difficult to deal with. Sour acid is also the main source of acid heavy metal ion wastewater from smelters. The traditional treatment process produces a large amount of hazardous waste residues and the treatment cost is high. Swirling electrolysis technology has attracted more and more attention because of its wide range of applicability and high selectivity. In this dissertation, the effects of initial copper ion concentration on the removal of copper and arsenic were studied by using swirling electrolysis technique. The effects of initial copper ion concentration on the removal of copper and arsenic were also studied. The results showed that the arsenic removal rate was the best (71.42%) at 6 h when the initial copper ion concentration was 3 g · L -1. When the initial concentration of copper ion was within 3 g · L -1, the removal rate of arsenic increased with the increase of initial copper ion concentration. When the initial concentration of copper ion exceeded 3 g · L -1, the initial copper ion Increased concentration is detrimental to arsenic removal. Swirling electrolysis can be used for arsenic removal at a high current density of 500 A · m -2, higher than 320 A · m -2 of the continuous electrowinning method in parallel cycle and 200 A · M -2, the ratio of copper and arsenic in the slag can reach 0.65:1.00, which is much lower than 1.8-1.8 times of the continuous cycle electrowinning in parallel cycle and 6.6:1.0 in the control of cathodic potential electrowinning The arsenic slag copper content.