铁-碳微电解法处理铜冶炼含砷废水的实验研究  

Experimental Study on Treatment of Arsenic Containing Wastewater from Copper Smelting by Iron⁃Carbon Micro⁃electrolysis

作　　者：李学鹏 王娟 常军 王子阳 LI Xuepeng;WANG Juan;CHANG Jun;WANG Ziyang(College of Materials and Chemical,Tongren University,Tongren 554300,Guizhou,China;School of Data Science,Tongren University,Tongren 554300,Guizhou,China)

机构地区：[1]铜仁学院材料与化学工程学院,贵州铜仁554300 [2]铜仁学院大数据学院,贵州铜仁554300

出　　处：《矿冶工程》2024年第3期116-119,共4页Mining and Metallurgical Engineering

基　　金：贵州省科技厅基础研究计划项目(黔科合基础[2020]1Y223);铜仁市科技局科技支撑计划项目(铜市科研[2023]15号);贵州省高等学校重点实验室(黔教技[2023]026号)。

摘　　要：采用铁-碳微电解法处理铜冶炼含砷废水,考察了进水pH值、空气鼓入量、接触时间、振动频率、固液比(铁-碳微电解材料质量∶每分钟进水质量)等工艺参数对除砷效率的影响。结果表明,铁-碳微电解材料处理铜冶炼含砷废水时,生成的FeAsO4、Fe2O3、Fe3O4等氧化物沉积在铁-碳微电解材料表面,使铁-碳微电解材料钝化失效,导致除砷效率差,采用振动的方法可有效解决铁-碳微电解材料钝化失效问题;在进水pH值2.0、空气鼓入量5 L/min、接触时间2 min、固液比2.5∶1、振动频率每4 h振动2 min条件下,铁-碳微电解材料连续稳定处理废水90 d,除砷率达99.99%,水中砷含量降至0.033~0.036 mg/L,除砷效果理想且稳定。采用铁-碳微电解法除砷,为处理铜冶炼含砷废水提供了新思路。The iron-carbon(Fe-C)micro-electrolysis was adopted to treat arsenic-containing wastewater from copper smelting,and the effects of processing parameters,including pH of inlet water,air blowing rate,contacting time,vibration frequency,solid-liquid ratio(mass ratio of Fe-C micro-electrolysis material to inlet water per minute),on the arsenic removal efficiency were explored.Results show that during the treatment by Fe-C micro-electrolysis,the generated oxides such as FeAsO4,Fe2O3,and Fe3O4 are deposited on the surface of the Fe-C micro-electrolysis material,making passivation of the Fe-C micro-electrolysis material ineffective,thus resulting in poor arsenic removal efficiency.The use of vibration can effectively solve such problem.It is shown that after 90 d continuous treatment under the conditions,including pH of inlet water at 2.0,air blowing rate at 5 L/min,contacting time of 2 min,solid-liquid ratio of 2.5∶1,vibration frequency rate at 2 min every 4 h,the arsenic removal rate can be up to 99.99%and the arsenic content in water falls down to 0.033-0.036 mg/L,presenting a good and stable removal effect.It is concluded that this arsenic removal approach by adopting Fe-C micro-electrolysis can provide a new idea for treatment of arseniccontaining wastewater from copper smelting.

关 键 词：废水处理 除砷 含砷废水 铁-碳微电解 钝化 

分 类 号：X703[环境科学与工程—环境工程]