Mercury Removal From Solution by High Gradient Magnetic Separation With Functional Group Modified Magnetic Activated Carbon
Mercury Removal From Solution by High Gradient Magnetic Separation With Functional Group Modified Magnetic Activated Carbon
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DOI：
10.1109/tasc.2013.2292315
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发表时间：
2014-06
影响因子：
1.8
通讯作者：
O. Miura;S. Tachibana
中科院分区：
文献类型：
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作者：
O. Miura;S. Tachibana
汞的环境污染已成为一个全球性的严重问题。特别是甲基汞等汞化合物的毒性非常高，迫切需要发展净化技术。为了有效地去除水环境中的汞，我们新开发了几种官能团改性磁性活性炭（MAC）。研究了它们对甲基汞的吸附解吸性能和磁分离能力。采用化学合成和物理吸附相结合的方法对活性炭进行了磁性播种。合成了具有酸性官能团的氧化磁性活性炭（Ox-MAC）和SH自由基修饰磁性活性炭（SH- mac）。对汞的吸附性能与制备工艺有关，例如在高浓度溶液中，每g MAC可吸附44.8 mg甲基汞。即使在2 T以下的低磁场条件下，高梯度超导磁滤波器也能以1m /s的高速收集MAC。
Environmental pollution of mercury is growing into a serious problem on a worldwide scale. In particular, the toxicity of the mercuric compound like methylmercury is so high that the development of the purification technology is strongly demanded. In order to eliminate mercury efficiently from the aquatic environment, we have newly developed several kinds of functional group modified magnetic activated carbon (MAC). We have studied their adsorption and desorption properties of methylmercury and the magnetic separation ability. The magnetic seeding for activated carbon was done by both chemical synthetic procedure and physical adsorption of nano-size magnetite. An oxidized magnetic activated carbon (Ox-MAC) having acid functionalities and a SH radical-decorated magnetic activated carbon (SH-MAC) were synthesized. The mercury adsorption performance depends on the fabrication process, for example 44.8 mg methylmercury adsorption per 1 g of MAC was achieved in high concentration solution. MAC was possible to be collected at high speed of 1 m/s by a high gradient superconducting magnetic filter even in low magnetic fields under 2 T.