Chin. J. Process Eng. ›› 2016, Vol. 16 ›› Issue (4): 700-705.DOI: 10.12034/j.issn.1009-606X.215262
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FU Ping-feng ,YANG Tian-wen ,FENG Jie
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傅平丰,杨天文,冯杰
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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
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
CLC Number:
X703
FU Ping-feng YANG Tian-wen FENG Jie. Preparation of Porous Fe/C Micro-electrolysis Filter and Its Adsorptive Property to Pb2+ in Aqueous Solution[J]. Chin. J. Process Eng., 2016, 16(4): 700-705.
傅平丰 杨天文 冯杰. 多孔铁炭微电解填料的制备及其对水中Pb2+的吸附特性[J]. 过程工程学报, 2016, 16(4): 700-705.
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URL: https://www.jproeng.com/EN/10.12034/j.issn.1009-606X.215262
https://www.jproeng.com/EN/Y2016/V16/I4/700