欧陶莎, 邓达义, 邓培雁, 黄华颖, 赖宇维. 改性活性炭负载铁氧化物及其对Pb2+的吸附特性研究[J]. 华南师范大学学报(自然科学版), 2017, 49(2): 94-101. doi: 10.6054/j.jscnun.2017077
引用本文: 欧陶莎, 邓达义, 邓培雁, 黄华颖, 赖宇维. 改性活性炭负载铁氧化物及其对Pb2+的吸附特性研究[J]. 华南师范大学学报(自然科学版), 2017, 49(2): 94-101. doi: 10.6054/j.jscnun.2017077
Activated Carbon/Fe3O4 Magnetic Composite:a Magnetic Adsorbent for the Adsorption of Pb(II)[J]. Journal of South China Normal University (Natural Science Edition), 2017, 49(2): 94-101. doi: 10.6054/j.jscnun.2017077
Citation: Activated Carbon/Fe3O4 Magnetic Composite:a Magnetic Adsorbent for the Adsorption of Pb(II)[J]. Journal of South China Normal University (Natural Science Edition), 2017, 49(2): 94-101. doi: 10.6054/j.jscnun.2017077

改性活性炭负载铁氧化物及其对Pb2+的吸附特性研究

Activated Carbon/Fe3O4 Magnetic Composite:a Magnetic Adsorbent for the Adsorption of Pb(II)

  • 摘要: 以过硫酸盐预处理活性炭再用化学沉淀法联合超声技术制备出的磁性活性炭,具有比表面积高、官能团丰富、磁性能好等优点,其磁性活性炭比表面积为646.81 m2/g,孔径为2.11 nm,孔容为0.327 m2/g. 官能团主要为羟基、羧基和酯基等. 饱和磁化强度为10.07 emu/g,有利于吸附后的分离,剩余磁化强度为1.165 emu/g,具有一定的抗退磁能力. 采用静态吸附实验的方法,比较了活性炭和制备的磁性活性炭在水溶液中对铅的吸附量,结果表明磁性活性炭对铅的饱和吸附量为68.925 mg/L,远超过活性炭对铅的吸附量30.125 mg/L,显示出磁性活性炭对水溶液中铅优异的吸附性能.

     

    Abstract: Activated carbon/iron oxide composite has been widely studied in the compound material field. As its unique microporous structure and specific surface area, activated carbon provides active sites for the precipitation of magnetic particles. Magnetic activated carbon was prepared by chemical precipitation and ultrasonic technique after persulfate oxidation pretreatment. It contains higher specific surface area, abundant functional groups and good magnetic response, with a relatively high surface area of 770 m2/g, large pore diameter of 2.11 nm, pore volume of 0.327 m2/g. Saturation magnetization (Ms) of 10.07 emu/g and high-Coerciv is helpful to the separation and anti-demagnetization ability of the magnetic activated carbon. Through static absorption experiment to test the adsorption capacity of activated carbon and magnetic activated carbon, the result show that magnetic activated carbon has a high adsorption capacity of 68.925 mg/L Pb(Ⅱ) and is far beyond that of activated carbon which capacity is 30.125 mg/L.

     

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