State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China.
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China.
Chemosphere. 2019 Mar;219:183-190. doi: 10.1016/j.chemosphere.2018.11.132. Epub 2018 Nov 21.
The waste materials utilization has attained increasing attention due to the generation of a large number of spent materials. In the current study, a practical magnetic adsorbent (FeO-doped spent Fluid Catalytic Cracking catalysts, abbreviated as FCC@(Fe)-O) was prepared, liable to be separated. The batch experiments were employed to investigate the phosphate removal behavior. The findings of this study demonstrated that FCC@(Fe)-O exhibited the best phosphate removal performance among the adsorbents (FCC@(Fe)-O), attributed to rough surface layer, i.e., composed of active sites. The various characterizations results revealed that the adsorption behavior of FCC@(Fe)-O followed the inner-sphere adsorption based on ligand exchanges mechanism. Furthermore, OH played an important role in the adsorption process. Minor effects were showed on the phosphate removal in the experiments of commonly coexisting anions, except CO and SiO. The above findings affirmed that FCC@(Fe)-O was a suitable adsorbent for phosphate removal in the practical application.
由于大量废材料的产生，废材料的利用得到了越来越多的关注。在当前的研究中，制备了一种实用的磁性吸附剂（掺杂 Fe 的废流化催化裂化催化剂，简称 FCC@(Fe)-O），易于分离。采用批量实验研究了磷酸盐去除行为。本研究结果表明，FCC@(Fe)-O 在吸附剂（FCC@(Fe)-O）中表现出最好的磷酸盐去除性能，这归因于粗糙的表面层，即由活性位点组成。各种特性研究结果表明，FCC@(Fe)-O 的吸附行为遵循基于配体交换机制的内球吸附。此外，OH 在吸附过程中起着重要作用。在通常共存阴离子（除 CO 和 SiO 外）的实验中，磷酸盐去除的影响较小。上述发现证实，FCC@(Fe)-O 是实际应用中去除磷酸盐的合适吸附剂。
