• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Global Symposium on Recycling, Waste Treatment and Clean Technology; 20040926-29; Madrid(ES) >DECONTAMINATION OF TWO LIGAND-CONTAINING ELECTROPLATING SOLUTIONS ONE BY OTHER
【24h】

DECONTAMINATION OF TWO LIGAND-CONTAINING ELECTROPLATING SOLUTIONS ONE BY OTHER

机译：两种含有一种配体的电镀溶液的去污

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The solid solutions of copper-(zinc)-potassium-ammonium diphosphates are precipitated after mixing rinsing wastewater containing copper diphosphate with rinsing wastewater containing acidic zinc (with ammonium) electroplating solution (case Ⅰ) or with spent etching solution of printed circuit boards (case Ⅱ) and pH adjustment. About 70-99.7% of environmentally dangerous substances, viz. copper, zinc and diphosphate ions are removed from the solution. Several possible ways to utilize the precipitate are suggested.Cu~(2+) and Zn~(2+) ions may be removed from the filtrates below DCL in industry using lime (case Ⅰ) or lime + CaCl_2 solution (case Ⅱ). After that, the diphosphate ions may be removed by addition of spent steel etching solution, or, alternatively, by continuous mixing with phosphogypsum. It is possible to remove Cu~(2+) and Zn~(2+) ions below DCL and to lower the concentration of phosphates (5 to 40 fold) and ammonium (95-99.7 %) by precipitation of barely soluble fine crystalline MgNH_4PO_4·6H_2O (struvite).
机译：将含二磷酸铜的冲洗废水与含酸性锌（含铵）的电镀废水（例Ⅰ）或印刷电路板的废蚀刻液（例1）混合后，沉淀出二磷酸铜（锌）钾铵铵的固溶体。 Ⅱ）和pH调节。约70-99.7％的环境有害物质，即。从溶液中除去铜，锌和二磷酸根离子。提出了几种利用该沉淀物的可能方法。工业上使用石灰（第Ⅰ种）或石灰+ CaCl_2溶液（第Ⅱ种）可从DCL以下的滤液中除去Cu〜（2+）和Zn〜（2+）离子。此后，可以通过添加废钢蚀刻溶液或通过与磷石膏连续混合来去除二磷酸根离子。通过沉淀几乎不溶的细晶MgNH_4PO_4，可以去除DCL以下的Cu〜（2+）和Zn〜（2+）离子，降低磷酸盐（5至40倍）和铵盐（95-99.7％）的浓度。 ·6H_2O（鸟粪石）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号