|Table of Contents|

Phosphorus-Doped Biochar Activates Persulfate to Eliminate Paracetamol with the Assistance of Sodium Thiosulfate(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2023年02期
Page:
122-130
Research Field:
环境科学与工程
Publishing date:

Info

Title:
Phosphorus-Doped Biochar Activates Persulfate to Eliminate Paracetamol with the Assistance of Sodium Thiosulfate
Author(s):
Hu Kai1; Nie Liyao1; Li Congyang2; Wang Haorui1; Wang Guoxiang1; Shi Chenfei1
(1.School of Environment,Nanjing Normal University,Jiangsu Key Laboratory of Environmental Change and Ecological Construction,Nanjing 210023,China)
(2.School of Computer Engineering,Nanjing Institute of Technology,Nanjing 211167,China)
Keywords:
paracetamol;  phosphorus-doped biochar;  persulfate;  thiosulfate
PACS:
X505
DOI:
10.3969/j.issn.1001-4616.2023.02.016
Abstract:
In recent years, much attention has been attracted in the eliminate of emerging pollutants such as personal pharmaceuticals and care products. In this study, phosphorus-doped biochars were adopted to activate persulfate(PS)with the assistance of sodium thiosulfate(TS)to eliminate paracetamol(PAT), which was one of commonly used antipyretic and analgesic drugs. The phosphorus-doped biochar alone could not activate persulfate effectively, and the elimination efficiency of PAT could be improved significantly after the addition of TS, indicating that a significant synergistic effect existed between PS, TS and phosphorus-doped biochar. The source of phosphorus exhibited a significant effect on the performance of biochar. In contrast to diammonium hydrogen phosphate, disodium hydrogen phosphate modified biochar showed better activation effect on PS. The degradation and elimination efficiency of PAT could reach 80% within a certain range of chloride ions concentration(0-10 mmol·L-1)and pH(4.0-10.0). Quenching experiments, electron paramagnetic resonance(EPR)measurements and sulfate ion analysis indicated that free radicals(SO4·-和·OH)and singlet oxygen(1O2)were not the main reactive species in the system, and non-radical pathways such as electron transfer may be responsible for the degradation of PAT. This study might provide a new idea for the degradation of PAT and the development of advanced oxidation process.

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Last Update: 2023-06-15