An efficient method for removal of pentachlorophenol using adsorption and microwave regeneration with different magnetic carbon nanotubes.

Xue Zhang, Chunyue Cui, Ying Wang, Jing Chang, Dong Ma, Jing Wang

Water science and technology : a journal of the International Association on Water Pollution Research 2020 Feb

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Various magnetic carbon nanotubes (CNTs) Co0.5M0.5Fe2O4-CNTs (M = Cu, Mn, Ni, Zn) were successfully prepared and applied for treatment of pentachlorophenol (PCP) with adsorption and microwave irradiation process. The Co0.5M0.5Fe2O4-CNTs were characterized by transmission electron microscopy, X-ray diffraction, vibrating sample magnetometry, and microwave absorption spectroscopy. The adsorption experiment results showed the adsorption capacity for PCP was in the following order: Co0.5Cu0.5Fe2O4-CNTs > Co0.5Mn0.5Fe2O4-CNTs > Co0.5Ni0.5Fe2O4-CNTs > Co0.5Zn0.5Fe2O4-CNTs. After adsorption, the Co0.5M0.5Fe2O4-CNTs was separated by magnetic field and regenerated by microwave irradiation at 850 W for 180 s. It was confirmed that after six adsorption and microwave regeneration cycles, the regeneration efficiency maintained over 90%. In particular, Co0.5Cu0.5Fe2O4-CNTs exhibited excellent adsorption capacity and reusability. These results can open a new avenue for treatment of chlorinated organic compounds with efficiently and non-secondary pollution.

Citation

Xue Zhang, Chunyue Cui, Ying Wang, Jing Chang, Dong Ma, Jing Wang. An efficient method for removal of pentachlorophenol using adsorption and microwave regeneration with different magnetic carbon nanotubes. Water science and technology : a journal of the International Association on Water Pollution Research. 2020 Feb;81(3):585-595