• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advances in Environmental Technology >Toxic metal removal from aqueous solution by advanced Carbon allotropes: a case study from the Sungun Copper Mine
【24h】

Toxic metal removal from aqueous solution by advanced Carbon allotropes: a case study from the Sungun Copper Mine

机译：先进的碳同素异形体从水溶液中去除有毒金属：以Sungun铜矿为例

获取原文
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The sorption efficiencies of graphene oxide (GO) and functionalized multi-walled carbon nanotubes (f-MWCNTs) were investigated and elucidated to study their potential in treating acid mine drainage (AMD) containing Cu2+, Mn2+, Zn2+, Pb2+, Fe3+ and Cd2+ metal ions. Several layered GO nanosheets and f-MWCNTs were formed via the modified Hummers’ method and the acid treatment of the MWCNTs, respectively. The prepared nanoadsorbents were characterized by field emission scanning electron microscopy (FE-SEM), Fourier transformed infrared (FTIR) spectroscopy, and BET surface area analysis. The batch method was utilized to evaluate the pH effect, sorption kinetics and isotherms. The results demonstrated that the sorption capacities of the MWCNTs increased greatly after oxidation and those of the GO decreased after reduction. Hence, the sorption mechanisms seemed principally assignable to the chemical interactions between the metal ions and the surface functional groups of the adsorbents. Additionally, the adsorption isotherm results clearly depicted that the adsorption of the Cu2+ ion onto the GO adsorbent surface was well fitted and found to be in good agreement with the Langmuir isotherm model as the obtained regression constant value (R2) was found to be 0.9981. All results indicated that GO was a promising material for the removal of toxic metal ions from aqueous solutions in actual pollution management.
机译：研究并阐明了氧化石墨烯（GO）和功能化多壁碳纳米管（f-MWCNTs）的吸附效率，以研究它们在处理含Cu2 +，Mn2 +，Zn2 +，Pb2 +，Fe3 +和Cd2 +金属的酸性矿山排水（AMD）中的潜力离子。分别通过改进的Hummers法和酸处理MWCNT形成了数层GO纳米片和f-MWCNT。通过场发射扫描电子显微镜（FE-SEM），傅立叶变换红外光谱（FTIR）和BET表面积分析对制备的纳米吸附剂进行表征。分批法用于评估pH值的影响，吸附动力学和等温线。结果表明，氧化后，碳纳米管的吸附能力大大提高，还原后，碳纳米管的吸附能力下降。因此，吸附机理似乎主要归因于金属离子与吸附剂表面官能团之间的化学相互作用。此外，吸附等温线结果清楚地表明，Cu2 +离子在GO吸附剂表面上的吸附非常合适，并且发现与Langmuir等温线模型吻合良好，因为发现回归常数（R2）为0.9981。所有结果表明，GO是用于在实际污染管理中从水溶液中去除有毒金属离子的有前途的材料。

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