TY - JOUR
T1 - Treatment of pyridine in industrial liquid waste by atmospheric DC water plasma
AU - Duan, Chengyuan
AU - Tanaka, Manabu
AU - Kishida, Masahiro
AU - Watanabe, Takayuki
N1 - Funding Information:
This work was supported by the JSPS KAKENHI of Japan (Grant No. JP19H01887, JP18H03856). We also thank to Center for Advanced Instrumental and Educational Supports, Faculty of Agriculture, Kyushu University, for LC-MS analysis.
Funding Information:
This work was supported by the JSPS KAKENHI of Japan (Grant No. JP19H01887, JP18H03856). We also thank to Center for Advanced Instrumental and Educational Supports, Faculty of Agriculture, Kyushu University, for LC-MS analysis. (a) the significance and novelty of the work, with respect to existing literature, A novel mist-type water plasma torch was developed recently in 2019 for the treatment of highly-concentrated liquid waste of several mol%. Treatment of pyridine of up to 2.2?mol% was demonstrated, reaction pathway of nitrogen-containing radicals in water plasma was discussed in this paper. (b) why the studied material should be considered ?hazardous material?, Pyridine is a typical hazardous, used in industries like pharmaceutical production, which is highly toxic. The concentration of it was reported as up to 2?mol% in the liquid waste from pharmaceutical production.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/5/15
Y1 - 2022/5/15
N2 - Pyridine is a basic heterocyclic compound with high toxicity, widely found in liquid waste from industrial processes. The treatment of highly-concentrated pyridine was demonstrated using a novel mist-type water thermal plasma torch. Decomposition rate and TOC removal rate were more than 94% in all conditions, while the max energy efficiency reached about 23 g/kWh. With a high temperature of 5500–7500 K, more than 95% of carbon content in pyridine was converted into valuable gas products, while a little amount of formic acid and acetic acid were observed as liquid by-products. The production of hydrogen cyanide (HCN) during the thermal decomposition of pyridine was observed, which can be inhibited by increasing the input power. Based on the experimental results, detailed decomposition mechanisms in the high-temperature and the downstream region were discussed respectively. Water plasma shows significant potential in the treatment of non-biodegradable industrial liquid waste.
AB - Pyridine is a basic heterocyclic compound with high toxicity, widely found in liquid waste from industrial processes. The treatment of highly-concentrated pyridine was demonstrated using a novel mist-type water thermal plasma torch. Decomposition rate and TOC removal rate were more than 94% in all conditions, while the max energy efficiency reached about 23 g/kWh. With a high temperature of 5500–7500 K, more than 95% of carbon content in pyridine was converted into valuable gas products, while a little amount of formic acid and acetic acid were observed as liquid by-products. The production of hydrogen cyanide (HCN) during the thermal decomposition of pyridine was observed, which can be inhibited by increasing the input power. Based on the experimental results, detailed decomposition mechanisms in the high-temperature and the downstream region were discussed respectively. Water plasma shows significant potential in the treatment of non-biodegradable industrial liquid waste.
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U2 - 10.1016/j.jhazmat.2022.128381
DO - 10.1016/j.jhazmat.2022.128381
M3 - Article
C2 - 35149488
AN - SCOPUS:85124195889
SN - 0304-3894
VL - 430
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 128381
ER -
