...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Cleaner Production >Preparation of nanometer nickel powder from spent electroless nickel plating baths by using thiourea dioxide as a green reductant
【24h】

Preparation of nanometer nickel powder from spent electroless nickel plating baths by using thiourea dioxide as a green reductant

机译：以二氧化硫脲为绿色还原剂，从废化学镀镍浴中制备纳米镍粉

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

Considering the serious environmental problem and recent high nickel prices, it is urgent to develop an effective method to treat the large amount of spent electroless nickel plating (EN) baths. In this research, the recovery of nickel from spent EN baths by using dioxide thiourea (TD) as the reductant was studied. The final products were characterized by scanning electron microscopy (SEM) and X-ray diffractometry (XRD). Reaction parameters such as pH value, temperature and reaction time were optimized. The experimental results showed that about 98% nickel was obtained in 10 min, at pH 13.5, 80 ℃ in the presence of a certain amount of TD (mole ratio of TD to nickel(Ⅱ) was 1:1.95). The SEM photos showed that the morphology of obtained nickel powder was uniform and spherical with the size of 15-25 nm. The XRD analysis demonstrated the high purity of obtained nickel powder. In the post-treatment, dithiocarbamate type chelating resin (DTCR) was used as the advanced treatment agent to remove the residual nickel(Ⅱ) in the supernatant. The final concentration of the treated wastewater was 0.95 mg L~(-1), which was below the national discharge standard of 1.0 mg L~(-1). Since thiourea is a common industrial reductant, it is foreseen that this methodology holds the potential for industrial scale treatment of spent EN baths.
机译：考虑到严重的环境问题和近来的高镍价，迫切需要开发一种有效的方法来处理大量的废化学镀镍（EN）镀液。在这项研究中，研究了使用二氧化硫脲（TD）作为还原剂从用过的EN浴中回收镍。通过扫描电子显微镜（SEM）和X射线衍射仪（XRD）表征最终产物。优化了pH值，温度和反应时间等反应参数。实验结果表明，在一定量的TD存在下，在pH 13.5、80℃，10 min内能获得约98％的镍（TD与镍（Ⅱ）的摩尔比为1：1.95）。 SEM照片显示，所获得的镍粉的形态均匀且呈球形，尺寸为15-25nm。 XRD分析表明所获得的镍粉具有高纯度。在后处理中，使用二硫代氨基甲酸酯型螯合树脂（DTCR）作为高级处理剂，以去除上清液中残留的镍（Ⅱ）。处理后的废水终浓度为0.95 mg L〜（-1），低于国家排放标准1.0 mg L〜（-1）。由于硫脲是一种常见的工业还原剂，因此可以预见，这种方法具有工业规模处理废EN浴的潜力。

著录项

  • 来源
    《Journal of Cleaner Production》 |2014年第1期|701-706|共6页
  • 作者

    Haoyang Wang; Qimeng Li; Canzhu Gao;

  • 作者单位

    School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu 210042, People's Republic of China;

    School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, People's Republic of China;

    School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, People's Republic of China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Spent electroless nickel bath; Nickel; Recovery; Dioxide thiourea; DTCR;

    机译：用过的化学镀镍浴;镍;复苏;二氧化硫脲;数码录音机;

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