Recycling electroplating sludge as a monolithic catalyst for effective catalytic purification of volatile organic compounds

Zongfang Wang; Tianwei Wu; Jisheng Long; Li Bai; Jia Zhang; Guangren Qian

doi:10.1016/j.jenvman.2021.113567

Recycling electroplating sludge as a monolithic catalyst for effective catalytic purification of volatile organic compounds

J Environ Manage. 2021 Dec 1:299:113567. doi: 10.1016/j.jenvman.2021.113567. Epub 2021 Aug 20.

Authors

Zongfang Wang¹, Tianwei Wu², Jisheng Long³, Li Bai⁴, Jia Zhang⁵, Guangren Qian⁶

Affiliations

¹ SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China. Electronic address: 544760365@qq.com.
² SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China. Electronic address: 715570125@qq.com.
³ Shanghai SUS Environment Co., LTD, Shanghai, 201703, China. Electronic address: long@shjec.cn.
⁴ Shanghai SUS Environment Co., LTD, Shanghai, 201703, China. Electronic address: baili@shjec.cn.
⁵ SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China. Electronic address: irujam@t.shu.edu.cn.
⁶ SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China. Electronic address: grqian@shu.edu.cn.

PMID: 34419728
DOI: 10.1016/j.jenvman.2021.113567

Abstract

Electroplating sludge had a high content of heavy metals and usually lacked high-value-added utilization. In this work, Cu-containing sludge was used to synthesize a spinel catalyst, which was applied in catalytic oxidization of toluene. As a result, the sludge-derived spinel removed 50% of toluene (1000 ppm, 9600 h^-1) at 280 °C. In comparison, a reagent-synthesized spinel with a similar component removed 50% of pollutant at 294 °C. The sludge-derived spinel also showed a stable performance for over 50 h at 370 °C. Even when the initial concentration was increased to 5000 ppm, or the gas hourly space velocity was increased to 40,000 h^-1, the temperature for 50% removal was only increased to 303 °C. According to characterizations, surface oxygens of the sludge-derived spinel were more active than those in the reagent-synthesized one. Besides, the former had more active surface oxygens (207.9 μmol/g) than the latter (183.1 μmol/g). Furthermore, the sludge-derived spinel was coated on a monolithic honeycomb, which were also effective in catalytic oxidization of toluene. The main results of this work were in favor of high-value-added utilization of hazardous solid waste and promoting its real industry application.

Keywords: Catalytic oxidization; Electroplating sludge; Monolithic catalyst; Spinel; Volatile organic compounds.

MeSH terms

Catalysis
Electroplating
Recycling
Sewage*
Volatile Organic Compounds*

Substances

Sewage
Volatile Organic Compounds