摘要
用硝酸浸取铜钨合金废料中的铜,再用亚硫酸钠还原硝酸铜制备氧化亚铜。采用X射线衍射仪对氧化亚铜进行表征,考察了氧化亚铜产品对溶液中甲基橙的光催化效果,并与分析纯五水硫酸铜制备的氧化亚铜进行了对比。实验结果表明:在硝酸浓度为5.6 mol/L,硝酸用量为2.5 m L/g(为理论用量的1.5倍),浸取温度为40℃,浸取时间为6 h的最优浸取条件下,铜浸取率稳定在87%以上;在还原反应温度为80℃、还原反应时间为4h、硝酸铜浓度为0.8 mol/L的条件下,可制备得到较高纯度的氧化亚铜;在甲基橙质量浓度为20 mg/L、氧化亚铜加入量为2 g/L,500 W氙灯照射时间为2.5 h的条件下进行光催化反应,甲基橙降解率可达93%以上。与分析纯五水硫酸铜制备的氧化亚铜相比,两者形貌相似、光催化效果基本相当。
Copper in copper-tungsten alloy scrap was leached using nitric acid, and cuprous oxide was prepared from the copper nitrate-containing leaching solution by sodium sulfite reduction. The cuprous oxide product was characterized by XRD. The photocatalytic effect of the product on methyl orange in solution was studied and contrasted with that of cuprous oxide prepared from analytically pure copper sulfate pentahydrate. The experimental results show that： Under the optimum leaching conditions of nitric acid concentration 5.6 tool/L, nitric acid dosage 2.5 mL/g （1.5 times of theoretical dosage）, leaching temperature 40 ℃and reaction time 6 h, the copper leaching rate keeps more than 87%; When the reduction temperature is 80℃, the reduction time is 4 h and the cupric nitrate concentration is 0.8 mol/L, cuprous oxide with high purity can be prepared; When the photocatalytic reaction is carried out under the conditions of methyl orange mass concentration 20 mg/L, cuprous oxide dosage 2.0 g/L and irradiation time 2.5 h with 500 W xenon lamp, the degradation rate of methyl orange is above 93%. Contrasted with cuprous oxide prepared from analytically pure copper sulfate pentahydrate, the conclusions and photoeatalytic effects of them are same.
出处
《化工环保》
CAS
CSCD
北大核心
2016年第5期567-571,共5页
Environmental Protection of Chemical Industry
关键词
废铜钨合金
氧化亚铜
浸取
还原
光催化剂
甲基橙
copper-tungsten alloy scrap
cuprous oxide
leaching
reduction
pholocatalyst
methyl orange
