中文版 | English
Title

N-doped biochar-catalyzed dechlorination of carbon tetrachloride in sulfide-containing aqueous solutions: Performances, mechanisms and pathways

Author
Corresponding AuthorLiu,Na
Publication Years
2022-09-01
DOI
Source Title
ISSN
0043-1354
EISSN
1879-2448
Volume223
Abstract

Nitrogen-doped biochar (N-BC) has been widely concerned in the field of environmental protection. This study verified the alfalfa-based N-BC pyrolyzed at different temperatures is able to catalyze carbon tetrachloride (CT) dechlorination in sulfide-containing aqueous solutions under normal environmental pH range (6.3 ∼ 8.3) effectively, with Cl, trichloromethane (CF), CS and HCO as predominated products. Higher pyrolysis temperature resulted in larger specific surface area, more pores and better catalytic capacity. The N-BC had a good tolerance to water matrix in catalyzing CT dechlorination by sulfide, while the higher pH value or higher dosage of sulfide or N-BC was beneficial to catalytic CT dechlorination. The generation of CS was the major CT dechlorination pathway, attributing to the SN nucleophilic substitution by newborn C-SS- structure generating from the interaction between pyridine-N and sulfide. Besides, generation of CF via hydrogenolysis process was the minor CT dechlorination pathway, owing to the enhanced electron transfer by pyrrole-N, graphitic-N and quinones on surface of N-BC. It was the first time that N-BC was found to be effective in catalyzing the hydrogenolysis process of CT dechlorination. This study emphasized the importance of N-BC in restoring chlorinated hydrocarbons polluted aquatic environment containing sulfide, such as sediments.

Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
Important Publications
NI Journal Papers
SUSTech Authorship
First
Funding Project
National Natural Science Foundation of China[42007163]
WOS Research Area
Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS Subject
Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS Accession No
WOS:000888810300006
Publisher
EI Accession Number
20223512628873
EI Keywords
Carbon Tetrachloride ; Catalysis ; Dechlorination ; Doping (Additives) ; Hydrogenolysis ; PH ; Thiophene
ESI Classification Code
Chemistry, General:801.1 ; Chemical Reactions:802.2 ; Chemical Agents And Basic Industrial Chemicals:803 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2
ESI Research Field
ENVIRONMENT/ECOLOGY
Scopus EID
2-s2.0-85136462988
Data Source
Scopus
Citation statistics
Cited Times [WOS]:4
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/395096
DepartmentSchool of Environmental Science and Engineering
Affiliation
1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong Province,518055,China
2.South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou,Guangdong Province,510655,China
3.Institute of Groundwater and Earth Science,Jinan University,Guangzhou,Guangdong Province,510632,China
4.Innovation Center of Southern University of Science and Technology,Beijing,100083,China
First Author AffilicationSchool of Environmental Science and Engineering
First Author's First AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Ding,Longzhen,Wang,Yuhan,Tong,Lizhi,et al. N-doped biochar-catalyzed dechlorination of carbon tetrachloride in sulfide-containing aqueous solutions: Performances, mechanisms and pathways[J]. WATER RESEARCH,2022,223.
APA
Ding,Longzhen,Wang,Yuhan,Tong,Lizhi,Liu,Na,Wang,Chao,&Hu,Qing.(2022).N-doped biochar-catalyzed dechlorination of carbon tetrachloride in sulfide-containing aqueous solutions: Performances, mechanisms and pathways.WATER RESEARCH,223.
MLA
Ding,Longzhen,et al."N-doped biochar-catalyzed dechlorination of carbon tetrachloride in sulfide-containing aqueous solutions: Performances, mechanisms and pathways".WATER RESEARCH 223(2022).
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