GC-MS ultra trace analysis of dioxins produced through hydrothermal gasification of biowastes

Bircan, Sevgihan Yildiz; Kanamori, Ryuichi; Ohba, Kazuo; Matsumoto, Kozo; Kitagawa, Kuniyuki

doi:10.1016/j.microc.2011.07.009

Cited by 17 publications

(1 citation statement)

References 10 publications

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“…In general, the SCWG of SS is a thermal process, which leads to the production of gas, liquid (e.g., water-soluble product, oil-soluble product), and solid residue (SR). However, some persistent organic pollutants were also be generated in the process [3] , for example polycyclic aromatic hydrocarbons (PAHs) and Polychlorinated biphenyls (PCBs), which were absorbed on the SRs surface, and dissolved in the oil phase. Moreover, SS is a complex waste biomass, containing toxic and hazardous pollutants, such as PAHs, heavy metal, and PCBs.…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment of PAHs in Solid Residues from Supercritical Water Gasification of Sewage Sludge

Chen

et al. 2013

AMR

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In this study, the contents of polycyclic aromatic hydrocarbons (PAHs) in sewage sludge (SS) and solid residue (SR) from supercritical water gasification of SS were analyzed and the pollution degree and human health risk with PAHs in SS and SR samples were determined. SR samples were collected from different reaction condition, according to different reaction temperature, time and water content. The results show that the contents of PAHs in SR samples were increased after gasification reaction, ranging from1541 to 8234.8μg/kg, and that the PAHs with 4-6 rings are major pollutants in the SR samples. Based on Nemero Index P, the classification evaluation shows that the SR samples almost exceed the light polluted. While, the health risk assessment according to Benzo [pyrene total potency equivalents present that the health risks from PAHs are acceptable for children and adults using the SR sample for agricultural land.

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Section: Introductionmentioning

confidence: 99%

Risk Assessment of PAHs in Solid Residues from Supercritical Water Gasification of Sewage Sludge

Chen

et al. 2013

AMR

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Design and first experimental results of a bubbling fluidized bed for air gasification of plastic waste

Martínez-Lera

Torrico

Pallarés

et al. 2013

J Mater Cycles Waste Manag

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Dioxins and furans in biochars, hydrochars and torreficates produced by thermochemical conversion of biomass: a review

2023

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Converting raw biomass into valuable products protects the environment, improves economics, and helps tackle climate change by cutting resource demand and waste production. Thermochemical treatment is a common method for producing biochars, hydrochars and torreficates from biomass and organic wastes, which can also generate dioxins and furans and consequently limit the use of thermochemically converted chars. Here we review the presence of dioxins and furans in chars produced by hydrothermal carbonization, torrefaction, and pyrolysis processes under the influence of temperature, residence time, heating rate, pressure, and feedstock type. Dioxins and furans were mostly below 20 ng total toxic equivalence per kilogram (TEQ kg−1), with the highest level of 113 ng TEQ kg−1 found in over 100 samples of different char types. The most toxic products were hydrochars produced from sewage sludge. Processing temperature and feedstock type were key factors resulting in high dioxin levels in chars, and care should be taken when producing chars at temperatures up to 300 °C or using feedstocks previously contaminated with dioxins or preservatives.

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GC-MS ultra trace analysis of dioxins produced through hydrothermal gasification of biowastes

Cited by 17 publications

References 10 publications

Risk Assessment of PAHs in Solid Residues from Supercritical Water Gasification of Sewage Sludge

Risk Assessment of PAHs in Solid Residues from Supercritical Water Gasification of Sewage Sludge

Design and first experimental results of a bubbling fluidized bed for air gasification of plastic waste

Dioxins and furans in biochars, hydrochars and torreficates produced by thermochemical conversion of biomass: a review

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