Nano-Materials and Environmental Detection Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People's Republic of China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Nano-Materials and Environmental Detection Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
J Colloid Interface Sci. 2017 May 15;494:307-316. doi: 10.1016/j.jcis.2017.01.082. Epub 2017 Jan 24.
A new adsorbent, FeO sulfonated magnetic nanoparticle (FeO-SOH MNP), was developed for heavy metal ions removal from water, which could be effectively separated from the solution owing to the superparamagnetic property. The nanoparticles can be used to remove heavy metal ions due to the additional active site, "sulfo-group", introduced by the AMPS branches grafted onto the iron oxide. The as-synthesized materials were characterized by SEM, TEM, FT-IR and BET. The FTIR, XPS and Zeta potential were used to describe the adsorption mechanism. The FeO-SOH MNPs showed rapid removal for Pb and Cd with maximum of adsorption capacity of 108. 93 and 80.9mg/g at 25°C, respectively. The adsorption isotherms for Pb and Cd fitted better with Langmuir than Freundlich models, indicated that the processes of the removal of Pb and Cd could follow a kind of similar adsorption manner. The adsorption kinetic was consistent with pseudo-second-order model. Furthermore, the reuse experiments results showed the adsorbent might have potential in treating heavy metal ions pollution in water.
一种新型吸附剂，FeO 磺化磁性纳米粒子（FeO-SOH MNP），被开发用于从水中去除重金属离子，由于超顺磁性，它可以有效地从溶液中分离出来。由于 AMPS 支链接枝到氧化铁上引入了额外的活性位点“磺酸基”，因此这些纳米粒子可以用于去除重金属离子。所合成的材料通过 SEM、TEM、FT-IR 和 BET 进行了表征。FTIR、XPS 和 Zeta 电位用于描述吸附机理。FeO-SOH MNPs 对 Pb 和 Cd 的去除速度很快，在 25°C 时的最大吸附容量分别为 108.93 和 80.9mg/g。Pb 和 Cd 的吸附等温线更符合 Langmuir 模型而不是 Freundlich 模型，表明 Pb 和 Cd 的去除过程可能遵循一种类似的吸附方式。吸附动力学与拟二级模型一致。此外，重复使用实验结果表明，该吸附剂可能具有在水中处理重金属离子污染的潜力。
