Hierarchical porous biochar from shrimp shell for persulfate activation: A two-electron transfer path and key impact factors

Jiangfang Yu, Lin Tang, Ya Pang, Guangming Zeng, Haopeng Feng, Jiajing Zou, Jingjing Wang, Chengyang Feng, Xu Zhu, Xilian Ouyang, Jisui Tan

Research output: Contribution to journalArticlepeer-review

308 Scopus citations

Abstract

Herein, hierarchical porous biochar from shrimp shell (PSS-bio) was prepared and applied for persulfate activation for 2,4-dichlorophenol removal. The pyrolysis temperature was found to play an important role in carbon structure and property modulation, where PSS-bio obtained at 800 °C (PSS-800) exhibited the fastest adsorption capacity and the best catalytic activity with the degradation rates 29 times higher than that of PSS-bio obtained at 400 °C (PSS-400). Further analysis demonstrated that hierarchical pores and carbon configuration were two key impact factors of biochar in AOP. Interestingly, the original free-radical dominated pathway in PSS-400 also changed into a non-radical one (direct two-electron transfer path) in PSS-800, whose efficiency could be somewhat disturbed by pH values, humic acid and anions regardless of their concentrations as low as 5 mM or as high as 500 mM, demonstrating its application potential for the treatment of both highly saline water and organic-rich water.
Original languageEnglish (US)
JournalApplied Catalysis B: Environmental
Volume260
DOIs
StatePublished - Jan 1 2020
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-23

ASJC Scopus subject areas

  • General Environmental Science
  • Catalysis
  • Process Chemistry and Technology

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