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Research Progress on Adsorption and Degradation of Organic Pollutants on Sepiolite Mineral Interface (Vol. 49, No.6, Tot No.344 2021) TEXT SIZE: A A A

ZHANG Xueting1, YANG Hai1, NIE Xin2, WAN Quan2, YI Bing1

(1. Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Recycling, Hunan Institute of Engineering, Xiangtan Hunan 411104, China;
2. State Key Laboratory of Ore Deposit Geochemistry, Institute of geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

Abstract:With fibrous crystal morphology, and being large in specific surface area as well as in number of active silanol groups, sepiolite functions excellently as adsorbent, support and reinforcing material. It has been widely applied in pollution control such as air purification, wastewater treatment, and soil remedy in terms of heavy metal removal. This article summarizes the sepiolite for interface adsorption and degradation of organic pollutants in water. Firstly, the adsorption of organic dyes, organic pesticides as well as pharmaceutical and personal care products and the other organic pollutants on sepiolite were investigated, and then compared with the sepiolite modified by acid, alkaline, heat, ferromagnetic materials, foams and so on. Secondly, the analysis focus on the application of sepiolite in the sulfate radical and hydroxyl radical based on advanced oxidation technologies, and the removal efficiencies of organic pollutants was significantly promoted via the synergistic effect of adsorption and assistant catalysts. Lastly, the important areas of organic pollutants by sepiolite were pointed out, such as strengthening the efforts to do scientific research and development on sepiolite complex materials, promoting the synergistic effects of adsorption and assistance catalyst, and developing the method of silanol groups and then applied in the removal of organic pollutants in water, which provides a guidance for the treatment of organic pollutants wastewater and makes some suggestions for research and development of sepiolite.

Key words:sepiolite; organic pollutants; adsorption; degradation; sulfate radical; hydroxyl radical

EARTH AND ENVIRONMENT Vol.49, No.1, Tot No.344, 2021, Page 737-749

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