novel adsorption processes in water

Journal of Environmental Sciences 20(2008) 1–13

Research progress of novel adsorption processes in water purification: A review
QU Jiuhui ∗
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences,
Chinese Academy of Sciences, Beijing 100085, China. E-mail: [e-mail]

Abstract
As an effective, efficient, and economic approach for water purification, adsorbents and adsorption processes have been widely studied and applied in different aspects for a long time. In the recent years, a lot of novel adsorption processes have been developed for enhancing the efficiency of removing the organic and inorganic contaminants from water. This article reviews some new adsorbents and advanced adsorption methods that specialize in their compositions, structures, functions, and characteristics used in water treatment.
The review emphasizes adsorption/catalytic oxidation process, adsorption/catalytic reduction process, adsorption coupled with redox process, biomimetic sorbent and its sorption behaviors of POPs, and modified adsorbents and their water purification efficiency.
Key words: adsorbents; adsorption; pollutants; water purification

*Corresponding author. E-mail: [e-mail].

1 Adsorption/catalytic oxidation process
Adsorption/catalytic oxidation process can be divided into two categories: in situ and out situ adsorption with catalytic oxidation, according to whether adsorption process and oxidation process occur in the same reactor. Evidently, the photocatalytic degradation of organic pollutants by
TiO2 supported on adsorbents belongs to the former. The adsorption and catalytic oxidation of dyes by magnetic metal oxide composite (Wu et al., 2004) can be identified under the latter described.
1.1 Photocatalytic degradation by TiO2 supported on adsorbents c.

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Titanium dioxide has been widely used as photocatalytic material for removing toxic chemicals from waters.
However, certain

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