TY - JOUR
T1 - Molecular characterization and environmental impacts of water-soluble organic compounds of bio-oil from the thermochemical treatment of domestic sewage sludge
AU - Shen, Minghao
AU - Zhu, Xiangdong
AU - Shang, Hua
AU - Feng, Fei
AU - Ok, Yong Sik
AU - Zhang, Shicheng
N1 - Funding Information:
This research was supported by the National Natural Science Foundation of China (No. 21876030 ) and the Shanghai Natural Science Foundation of China (No. 19ZR1403800 ).
PY - 2021/2/20
Y1 - 2021/2/20
N2 - Water-soluble organic compounds derived from bio-oil (WOCB) are regarded as potential risk sources of sludge thermochemical treatment. This study showed that 10.35 mg of water-soluble organic carbon and 1.32 mg of water-soluble organic nitrogen were released per gram of sludge when the final temperature of thermochemical treatment was 600 °C. WOCB was mainly formed at 300–500 °C. Furthermore, FT-ICR MS results indicated that high temperatures promoted deamination reactions, and low molecular weight (LMW) compounds with low oxygen number polymerized into aromatic compounds with increasing temperature. Noteworthily, WOCB released at 20–600 °C showed strong phytotoxicity to wheat. LMW compounds with lignin/carboxylic rich alicyclic molecules (CRAM)-like structures derived from low temperatures (200–400 °C) induced this inhibitory effect, but lipids containing nitrogen and sulfur from high temperatures (400–600 °C) can act as nutrients to promote wheat growth. This study provides theoretical support for the risk control and benefits assessments of sludge thermochemical treatment.
AB - Water-soluble organic compounds derived from bio-oil (WOCB) are regarded as potential risk sources of sludge thermochemical treatment. This study showed that 10.35 mg of water-soluble organic carbon and 1.32 mg of water-soluble organic nitrogen were released per gram of sludge when the final temperature of thermochemical treatment was 600 °C. WOCB was mainly formed at 300–500 °C. Furthermore, FT-ICR MS results indicated that high temperatures promoted deamination reactions, and low molecular weight (LMW) compounds with low oxygen number polymerized into aromatic compounds with increasing temperature. Noteworthily, WOCB released at 20–600 °C showed strong phytotoxicity to wheat. LMW compounds with lignin/carboxylic rich alicyclic molecules (CRAM)-like structures derived from low temperatures (200–400 °C) induced this inhibitory effect, but lipids containing nitrogen and sulfur from high temperatures (400–600 °C) can act as nutrients to promote wheat growth. This study provides theoretical support for the risk control and benefits assessments of sludge thermochemical treatment.
KW - Bio-oil
KW - Domestic sewage sludge
KW - Environmental impact
KW - Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS)
KW - Thermochemical treatment
KW - Water-soluble organic compounds
UR - http://www.scopus.com/inward/record.url?scp=85096826121&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85096826121&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2020.144050
DO - 10.1016/j.scitotenv.2020.144050
M3 - Article
C2 - 33261874
AN - SCOPUS:85096826121
SN - 0048-9697
VL - 756
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 144050
ER -