Thermal degradation of hexachlorobenzene in the presence of calcium oxide at 340–400°C

Yin, Keqing; Gao, Xingbao; Sun, Yifei; Zheng, Lei; Wang, Wei

doi:10.1016/j.chemosphere.2013.08.014

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…For example, Takemine et al ( 2013 ) observed 90% mineralization of PFOA in an airstream at 700°C. Alkali addition enhanced destruction of halogenated compounds (Kamarehie et al, 2014 ; Takata et al, 2015 ; Yin et al, 2013 ), and laboratory‐scale incineration of lime‐conditioned sludge promotes fluorine mineralization from PFOS (Wang et al, 2013 ). Other chemical groups may serve as analogs to supplement PFAS‐specific research.…”

Section: Introductionmentioning

confidence: 99%

Per‐ and polyfluoroalkyl substances thermal destruction at water resource recovery facilities: A state of the science review

Winchell

Ross

Wells

et al. 2020

Water Environment Research

114

104

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Per‐ and polyfluoroalkyl substances (PFAS) are a recalcitrant group of chemicals and can be found throughout the environment. They often collect in wastewater systems with virtually no degradation prior to environmental discharge. Some PFAS partitions to solids captured in wastewater treatment which require further processing. Of all the commonly applied solids treatment technologies, incineration offers the only possibility to completely destroy PFAS. Little is known about the fate of PFAS through incineration, in particular, for the systems employed in water resource recovery facilities (WRRF). This review covers available research on the fate of PFAS through incineration systems with a focus on sewage sludge incinerators. This research indicates that at least some PFAS destruction will occur with incineration approaches used at WRRFs. Furthermore, PFAS in flue gas, ash, or water streams used for incinerator pollution control may be undetectable. Future research involving full‐scale fate studies will provide insight on the efficacy of PFAS destruction through incineration and whether other compounds of concern are generated. Practitioner points Thermal processing is the only commercial approach available to destroy PFAS. Thermal degradation conditions required for destruction of PFAS during incineration processes are discussed. Fate of PFAS through water resource recovery facility incineration technologies remains unclear. Other thermal technologies such as smoldering combustion, pyrolysis, gasification, and hydrothermal liquefaction provide promise but are in developmental phases.

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Section: Introductionmentioning

confidence: 99%

Per‐ and polyfluoroalkyl substances thermal destruction at water resource recovery facilities: A state of the science review

Winchell

Ross

Wells

et al. 2020

Water Environment Research

114

104

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“…Polychlorinated naphthalenes (PCNs) are structurally (see Supplementary Fig. S1 ) and toxicologically similar to polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), which pose potential risks to the global environment and human health 1 2 3 4 5 . PCNs could induce aryl hydrocarbon receptor-mediated responses, and thus display toxic mechanisms similar to those of dioxins 6 7 8 .…”

mentioning

confidence: 99%

Removal of polychlorinated naphthalenes by desulfurization and emissions of polychlorinated naphthalenes from sintering plant

Wang

Liu

Hou

et al. 2016

Sci Rep

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The sintering flue gas samples were collected at the inlets and outlets of the desulfurization systems to evaluate the influence of the systems on PCNs emission concentrations, profiles, and emission factors. The PCNs concentrations at the inlets and outlets were 27888–153672 pg m−3 and 11988–42245 pg m−3,respectively. Desulfurization systems showed excellent removal for PCNs, and the removal efficiencies of PCNs increase with increasing chlorination level. Lower chlorinated homologs are more sensitive to the desulfurization process than higher ones. High levels of PCNs were also detected in the gypsum (11600–29720 pg g−1) and fly ash samples (4946–64172 pg g−1). The annual total emissions of PCNs released to flue gas and gypsum from the sintering plants were about 394 kg, 48.5% of which was in gypsum. The surface area of the fly ash samples increased significantly from the first to the fourth stage of the series-connected electrostatic precipitator, accompanying obvious rising of concentration of PCNs in the fly ash samples.

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“…The degradation of HCB and other POP has been investigated using several physical, chemical, and biological approaches, such as, thermal degradation, 13 biodegradation through biosystems, 14,15 hybrid processes, 4,16 and biodegradation using microorganisms 17,18 . Nonetheless, bioremediation employing microorganisms has advantages over physical and chemical methods due to its affordability and environmental safety 19…”

Section: Introductionmentioning

confidence: 99%

“…For instance, the inadequate management of industrial waste in Brazil resulted in environmental aggressions such as the generation of tons of HCB-contaminated soil, which is not only inviable to any socioeconomic use, but also threatens the local ecosystems. 11,12 The degradation of HCB and other POP has been investigated using several physical, chemical, and biological approaches, such as, thermal degradation, 13 biodegradation through biosystems, 14,15 hybrid processes, 4,16 and biodegradation using microorganisms. 17,18 Nonetheless, bioremediation employing microorganisms has advantages over physical and chemical methods due to its affordability and environmental safety.…”

mentioning

confidence: 99%

Application of Deconica castanella ligninolytic enzymatic system in the degradation of hexachlorobenzene in soil

Neto

Coelho

Ballaminut

et al. 2021

Biotech and App Biochem

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Hexachlorobenzene (HCB) is a pollutant still found in the environment despite being widely banned. Considering that basidiomycetes are useful to degrade a variety of organochlorinated pollutants, we therefore report the influence of HCB on the ligninolytic enzymatic system of Deconica castanella. The inoculum was prepared with sugarcane bagasse and soybean flour and was added in soil with and without HCB (2000 mg kg soil −1 ), 5% emulsion containing soybean oil and Tween 20 at proportion 9:1, v:v; with 70% moisture at 25 • C. Fungal biomass was quantified by widely acknowledged growth biomarker ergosterol. The extraction of the enzymatic complex was performed and laccase, Mn-dependent peroxidase (MnP), and lignin peroxidase (LiP) activities were determined. Furthermore, HCB and its metabolites were quantified by gas chromatography and chlorides by potentiometric titration. Results evidenced that HCB did not interfere in fungal growth, though the only detected enzymatic activity was laccase. MnP and Lip were not detected during D. castanella growth in soil. The peak of laccase enzymatic activity occurred in the presence of HCB. In addition, the laccase exhibited thermostability. Therefore, we hereby shed light on the role of laccase in the degradation of HCB by an efficient low-cost and environmentally safe detoxification mechanism.

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Thermal degradation of hexachlorobenzene in the presence of calcium oxide at 340–400°C

Cited by 16 publications

References 29 publications

Per‐ and polyfluoroalkyl substances thermal destruction at water resource recovery facilities: A state of the science review

Per‐ and polyfluoroalkyl substances thermal destruction at water resource recovery facilities: A state of the science review

Removal of polychlorinated naphthalenes by desulfurization and emissions of polychlorinated naphthalenes from sintering plant

Application of Deconica castanella ligninolytic enzymatic system in the degradation of hexachlorobenzene in soil

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