期刊
CHEMICAL ENGINEERING JOURNAL
卷 441, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.136102
关键词
Persistent organic pollutants; Environmentally persistent free radicals; Anthracene; Thermochemical reaction; Synergetic inhibition
资金
- National Natural Science Foundation of China [22106029, 21936007, 22076201, 21906165]
- Fellowship of China Postdoctoral Science Foundation [2021 M703408]
- CAS Interdisciplinary Innovation Team [JCTD2019-03]
Copper compounds are strong promotors of the formation of unintentional persistent organic pollutants (POPs), while calcium compounds can inhibit this process. Understanding the mechanisms behind these processes is important for synergistic control of multiple POPs.
Copper compounds are considered the strongest promotors of unintentional persistent organic pollutants (POPs) formation, while calcium compounds are widely used to inhibit this process. Understanding the mechanisms underlying these processes is important for synergetic control of multiple POPs. Herein, the promoting ability of CuCl2 on the synergetic formation of POPs from anthracene and the underlying mechanisms were clarified. During thermochemical reaction with CuCl2, Cu2+ was first reduced to Cu+, and finally oxidized to CuO. Furthermore, CuCl2 promoted the formation of environmentally persistent free radicals (EPFRs) during thermochemical reaction. The formed EPFRs were identified as anthrone-type and anthraquinone-type radicals using electron paramagnetic resonance spectroscopy and gas chromatography/quadrupole time-of-flight mass spectrometry. Synergetic inhibition of POPs and EPFRs was achieved using CaO. The inhibiting mechanism of CaO was attributed to the absorption of chlorine originating from CuCl2 through the formation of CaClOH and the inhibition of free radical intermediates for POPs formation.
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