State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
J Hazard Mater. 2010 Feb 15;174(1-3):34-9. doi: 10.1016/j.jhazmat.2009.09.012. Epub 2009 Sep 8.
Commercial carbon blacks often have low adsorption capacity for metal ions. Surface modification of them by appropriate physical and chemical treatments could improve their absorption capacities, and hence extend their environmental application. A surface-modified nanoscale carbon black was prepared by oxidizing the carbon black with 65% HNO(3). Batch experiments showed that the adsorption quantities of Cu(II) or Cd(II) on this modified carbon black (MCB) were significantly increased compared with those on the parent one, and the maximum adsorption quantities of Cu(II) and Cd(II) on the MCB were 438 and 282 mmol kg(-1), respectively. The desorption percentages of Cu(II) or Cd(II) from the MCB increased with the increasing quantities initially adsorbed. In the binary system of Cu(II) and Cd(II), these two metal ions exhibited competition on the MCB, preferential for Cu(II). It could be concluded that the MCB had very good adsorption properties for the metal ions, and could be applied in the purification of wastewater containing such metal ions.
商业用炭黑通常对金属离子的吸附能力较低。通过适当的物理和化学处理对其进行表面改性可以提高其吸附能力，从而扩展其在环境中的应用。用 65%的硝酸氧化炭黑制备了一种表面改性的纳米炭黑。批量实验表明，与原炭黑相比，这种改性炭黑（MCB）对 Cu(II)或 Cd(II)的吸附量显著增加，MCB 对 Cu(II)和 Cd(II)的最大吸附量分别为 438 和 282mmol/kg。Cu(II)或 Cd(II)从 MCB 上的解吸百分比最初随吸附量的增加而增加。在 Cu(II)和 Cd(II)的二元体系中，这两种金属离子在 MCB 上表现出竞争，对 Cu(II)具有优先吸附性。可以得出结论，MCB 对金属离子具有很好的吸附性能，可应用于含有此类金属离子的废水的净化。
