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某黄金冶炼厂烟气净化酸性废水除砷试验研究

  • 作者:
  • 豆娜|彭剑平|王路平|赵娜
  • 作者单位:
  • 山东招金科技有限公司|招金矿业股份有限公司|山东招金科技有限公司|山东招金科技有限公司
  • 基金项目:

  • isnull
  • 详细信息:

  • 作者简介:
  • 豆娜(1987—),女,安徽淮北人,工程师,硕士,从事有色金属矿山废水、废渣处理工作;山东省招远市温泉路118号,山东招金科技有限公司,265400;E-mail:675515240@qq.com
  • 通讯作者:
  • isnull
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Study on the removal of arsenic from the acidic wastewater generated in the fume purification process in a gold smeltery

  • English Author:
  • Shandong Zhaojin Technology Co.,Ltd.|Zhaojin Mining Industry Co.,Ltd.|Shandong Zhaojin Technology Co.,Ltd.|Shandong Zhaojin Technology Co.,Ltd.
  • Unit:
  • 摘要
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  • 参考文献

摘要:

针对某黄金冶炼厂烟气净化产生的酸性废水中砷含量高的问题,采用铁盐混凝沉淀法除砷,并对反应条件进行优化。结果表明:铁盐混凝沉淀法除砷的最佳反应条件为七水硫酸亚铁投加量10.0 kg/m3、反应时间40 min、初始pH值9.0、絮凝剂PAM投加量10 g/m3、静置时间30 min,处理后废水中砷质量浓度降至0.45 mg/L,满足GB 8978—1996 《污水综合排放标准》中砷排放限值的要求。

关键词:

混凝沉淀法;七水硫酸亚铁;砷;酸性废水;絮凝剂

Abstract:

The arsenic content is high in the acidic wastewater generated in the fume purification process in a gold smeltery.Therefore,coagulation and sedimentation processes were selected to treat the arsenic with ferrous sulfate heptahydrate as the coagulant,and the reaction conditions were optimized.The results show that the optimum arsenic removal conditions were for coagulation and sedimentation process with ferrous sulfate heptahydrate as follows:the ferrous sulfate heptahydrate dosage of 10.0 kg/m3,the reaction time of 40 min,initial pH value of 9.0,the PAM flocculant dosage of 10 g/m3,and the precipitation time of 30 min.After the treatment,in the wastewater,the arsenic mass concentration is reduced to 0.45 mg/L,which meets the requirements of the arsenic discharge limit in the GB 8978-1996 Comprehensive Sewage Discharge Standard.

Keywords:

coagulation and sedimentation process;ferrous sulfate heptahydrate;arsenic;acidic wastewater;flocculant