1. Simultaneous adsorption and degradation of bisphenol A on magnetic illite clay composite: Eco-friendly preparation, characterizations, and catalytic mechanism.
- Author
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Bao, Teng, Damtie, Mekdimu Mezemir, Wei, Wei, Phong Vo, Hoang Nhat, Nguyen, Khanh Hoang, Hosseinzadeh, Ahmad, Cho, Kuk, Yu, Zhi Min, Jin, Jie, Wei, Xing Lai, Wu, Ke, Frost, Ray L., and Ni, Bing-Jie
- Subjects
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ILLITE , *BISPHENOL A , *MAGNETIC separation , *ADSORPTION (Chemistry) , *URBAN lakes , *SILVER , *CLAY , *PERMANENT magnet generators - Abstract
Excess bisphenol A (BPA) is a pollutant of concern in different water sources. In this work, magnetic illite clay-composite material (Fe 3 O 4 @illite) was synthesized via the coprecipitation method by loading Fe 3 O 4 nanoparticles (nano-Fe 3 O 4) onto the surfaces of illite clay. Results from different characterizations showed that nano-Fe 3 O 4 was embedded into illite clay nanosheets and existed on the surfaces of illite clay, thereby reducing the degree of agglomeration and improving dispersibility. The catalytic BPA degradation of Fe 3 O 4 @illite and nano-Fe 3 O 4 confirmed the superior performance of Fe 3 O 4 @illite compared with that of nano-Fe 3 O 4. The optimum operating parameters for degradation were 0.3 mL of H 2 O 2 at pH of 3 in the presence of Fe 3 O 4 @illite, which provided a maximum degradation capacity up to 816, 364, 113, and 68 mg/g for epoxy BPA concentration of resin wastewater (266 mg/L), synthetic wastewater (80 mg/L), Hefei City swan lake (25 mg/L), and Hefei University lake wastewater (14.94 mg/L), respectively, in 180 min reaction time. The degradation data conformed to the pseudo-first-order kinetic model. The degradation pathways and mineralization study revealed that the adsorption-Fenton-like reaction was the principal mechanism that demonstrated 100% degradation efficiency of Fe 3 O 4 @illite even after nine successive runs. The regeneration and reusability tendency analysis ensured that Fe 3 O 4 @illite can be easily separated by using magnets. Therefore, Fe 3 O 4 @illite composite with H 2 O 2 Fenton-like technology was a promising method for BPA degradation. Image 1 • Fe 3 O 4 @illite was successfully synthesized via a simple co-precipitation. • The maximum degradation capacity of Fe 3 O 4 @illite reached up to 364 mg/g. • Adsorption and Fenton-like oxidation were dominant removal mechanism. • BPA removal remained 100% after nine successive runs. • Magnetic separation of Fe 3 O 4 @illite was possible as a regeneration mechanism. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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