Wang Li, Shi Chengxiang, Wang Li, Pan Lun, Zhang Xiangwen, Zou Ji-Jun
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
Nanoscale. 2020 Feb 27;12(8):4790-4815. doi: 10.1039/c9nr09274a.
The shortage of water resources and increasingly serious water pollution have driven the development of high-efficiency water treatment technology. Among a variety of technologies, adsorption is widely used in environmental remediation. As a class of typical adsorbents, metal oxides have been developed for a long time and continued to attract widespread attention, since they have unique physicochemical properties, including abundant surface active sites, high chemical stability, and adjustable shape and size. In this review, the basic principles of the adsorption process will be first elucidated, including affecting factors, evaluation index, adsorption mechanisms, and common kinetic and isotherm models. Then, the adsorption properties of several typical metal oxides, and key parameters affecting the adsorption performance such as particle/pore size, morphology, functionalization and modification, supports and calcination temperature will be discussed, as well as their application in the removal of various inorganic and organic contaminants. In addition, desorption and recycling of the spent adsorbent are summarized. Finally, the future development of metal oxide based adsorbents is also discussed.
水资源短缺和水污染日益严重推动了高效水处理技术的发展。在各种技术中，吸附被广泛应用于环境修复。作为一类典型的吸附剂，金属氧化物因其具有独特的物理化学性质，包括丰富的表面活性位点、高化学稳定性以及可调节的形状和尺寸，已经发展了很长时间并持续受到广泛关注。在这篇综述中，将首先阐明吸附过程的基本原理，包括影响因素、评价指标、吸附机理以及常见的动力学和等温线模型。然后，将讨论几种典型金属氧化物的吸附性能，以及影响吸附性能的关键参数，如颗粒/孔径、形态、功能化和改性、载体和煅烧温度，以及它们在去除各种无机和有机污染物方面的应用。此外，还总结了废吸附剂的解吸和循环利用。最后，也讨论了基于金属氧化物的吸附剂的未来发展。
