Effects of experimental parameters on Hg0 removal over magnetic AgI-BiOI/CoFe2O4 photocatalysts using wet process

ZHANG Li-xiang; ZHANG An-chao; ZHU Qi-feng; WANG Hua; ZHANG Chun-jing

Volume 46 Issue 3

Mar. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(3): 365-374

ZHANG Li-xiang, ZHANG An-chao, ZHU Qi-feng, WANG Hua, ZHANG Chun-jing. Effects of experimental parameters on Hg0 removal over magnetic AgI-BiOI/CoFe2O4 photocatalysts using wet process[J]. Journal of Fuel Chemistry and Technology, 2018, 46(3): 365-374.

Citation:

ZHANG Li-xiang, ZHANG An-chao, ZHU Qi-feng, WANG Hua, ZHANG Chun-jing. Effects of experimental parameters on Hg⁰ removal over magnetic AgI-BiOI/CoFe₂O₄ photocatalysts using wet process[J]. Journal of Fuel Chemistry and Technology, 2018, 46(3): 365-374.

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Effects of experimental parameters on Hg⁰ removal over magnetic AgI-BiOI/CoFe₂O₄ photocatalysts using wet process

1.
School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, China
2.
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Funds:

The project was supported by the National Natural Science Foundation of China 51676064

The project was supported by the National Natural Science Foundation of China 51306046

The project was supported by the National Natural Science Foundation of China U1404520

the Young Core Instructor Project in the Higher Education Institutions of Henan Province 2016GGJS-038

the Fundamental Research Funds for the Universities of Henan Province NSFRF140204

the Outstanding Youth Science Foundation of Henan Polytechnic University J2016-1

More Information

Corresponding author: ZHANG Li-xiang, Tel: 15039126550, E-mail:anchaozhang@126.com
Received Date: 2017-09-15
Rev Recd Date: 2018-02-03

Available Online: 2021-01-23

Publish Date: 2018-03-10

Abstract

Abstract

A novel magnetic AgI-BiOI/CoFe₂O₄ hybrid composites were prepared via a solvothermal and subsequent coprecipitation method, and utilized to remove Hg⁰ from coal-fired flue gas under fluorescent light irradiation. The experimental parameters and main products presented in solution after reaction were investigated in detail. The experimental results showed that the AgI-BiOI/CoFe₂O₄ composites showing a poor thermal stability would transform into other compounds when the calcinated temperature was above 400℃. With the increases of photocatalyst dosage, reaction solution pH, temperature of reaction solution in reactor and O₂ concentration, the Hg⁰ removal efficiencies were first increased and then unchanged or decreased. The presences of inorganic anions such as CO₃^2- and SO₄^2- in solution exhibited some inhibitory effects on Hg⁰ removal. Furthermore, the presence of SO₂ had a dramatic inhibition on Hg⁰ removal, while the inhibitory effect of NO on Hg⁰ removal was relatively small. SO₄^2-, NO₃^- and Hg²⁺ species were the final oxidation products of SO₂, NO and Hg⁰ by reactive species.
- magnetically separable,
- AgI-BiOI/CoFe₂O₄,
- Hg⁰ removal,
- fluorescent light irradiation,
- experimental parameters

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References(33)

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