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过程工程学报 ›› 2016, Vol. 16 ›› Issue (4): 700-705.DOI: 10.12034/j.issn.1009-606X.215262

• 材料工程专栏 • 上一篇    下一篇

多孔铁炭微电解填料的制备及其对水中Pb2+的吸附特性

傅平丰,杨天文,冯杰   

  1. 北京科技大学土木与环境工程学院
  • 收稿日期:2015-07-10 修回日期:2015-08-10 出版日期:2016-08-20 发布日期:2016-10-10
  • 通讯作者: 傅平丰

Preparation of Porous Fe/C Micro-electrolysis Filter and Its Adsorptive Property to Pb2+ in Aqueous Solution

FU Ping-feng ,YANG Tian-wen ,FENG Jie   

  1. (School of Civil and Environmental Engineering,University of Science and Technology Beijing
  • Received:2015-07-10 Revised:2015-08-10 Online:2016-08-20 Published:2016-10-10
  • Contact: FU Ping-feng

摘要: 以铁精粉、煤粉与造纸污泥为原料,采用直接还原法制备多孔铁炭微电解填料,对其进行了表征,考察了铁炭填料对Pb2+的吸附特性,并与活性炭的吸附性能作了比较. 结果表明,铁炭填料孔隙率为32.3%~52.9%,金属铁含量达50%以上,铁炭质量比可调. 吸附Pb2+的最佳铁炭质量比为6.8:1, pH=3时铁炭填料对Pb2+的吸附量最大;吸附速度快,符合准二级吸附动力学模型,等温吸附过程可用Langmuir等温吸附模型描述;铁炭填料和活性炭对Pb2+的最大吸附量分别为112.36和27.94 mg/g,铁炭填料吸附Pb2+的性能远高于活性炭.

关键词: 铁炭填料, 微电解, Pb2, 吸附动力学

Abstract: The porous Fe/C micro-electrolysis filter was prepared from the iron ore concentrate, coal and papermaking sludge via a direct reduction method. The Fe/C filter was characterized. The adsorptive properties of Pb2+ in aqueous solution were tested by using Fe/C filter and activated carbon, respectively. The results showed that the Fe/C filter had the porosity of 32.3%~52.9%, metallic iron content of over 50% and adjustable Fe/C mass ratio. The optimized mass ratio of Fe to C was 6.8, and the largest adsorption capacity of Pb2+ was obtained at pH=3. The Pb2+ adsorption process with both the Fe/C filter and activated carbon fitted well with a pseudo-second order kinetic model. Langmuir isotherm equation could be used to evaluate the Pb2+ adsorptive capacity. The maximal adsorption capacity of Pb2+ was 112.36 and 27.94 mg/g for the Fe/C filter and activated carbon, respectively, showing the much higher adsorption capacity of the Fe/C filter.

Key words: Fe/C filter, micro-electrolysis, Pb2, adsorption kinetic

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