Clay-supported nanoscale zero-valent iron for Cr(Ⅵ) removal from aqueous solution

作者：DENG Xiao chan; SUN Shan; LI Li; TANG Ci lai; HUANG Ying ping; FANG Yan fen

来源：应用化工, 2016, 45(9).

• nZVI
• clay
• Cr(Ⅵ)
• mechanism

Nanoscale zero-valent iron(nZVI) was prepared by reducing ferric ion (FeCl3· 6H2O) to Fe0 using the borohydride ( NaBH4 ) reduction method ,nZVI was loasded onto clay as a supported material ( C-nZVI) .By studying the removal of environmental pollutant Cr (Ⅵ) from water by C-nZVI under these conditions (initial pH,initial concentration of reagent,the dose of nZVI).The result showed that Cr(Ⅵ) removal increased with the decreasing of initial pH ,initial concentration of Cr (Ⅵ) and the increasing of C-nZVI amount at room temperature ,about 95%of Cr(Ⅵ) was removed from aqueous solution using C-nZVI at an initial condition of 10 mg/L Cr(Ⅵ) within 60 min under the conditions of 30 g/L of C-nZVI, pH 4.14.The mechanism of Cr(Ⅵ) removal using C-nZVI was speculated which mainly involved to the reduction reaction and co-precipitation .

• 单位
  三峡大学; 空