Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 260, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118160
Keywords
Hierarchical porosity; Carbon configurations; Interfacial catalysis; Non-radical path; 2,4-Dichlorophenol
Funding
- National Natural Science Foundation of China [51579096, 51521006, 51409024]
- Key Research and Development Program of Hunan Province of China [2017SK2241]
- National Innovative Talent Promotion Program of China [2017FtA2088]
- National Program for Support of Top-Notch Young Professionals of China (2012)
- Funds for Innovative Province Construction of Hunan Province of China [2019RS3012]
- Training Program for Excellent Young Innovators of Changsha [kq1802022]
- Hunan Province Cooperative Innovation Center for The Construction & Development of Dongting Lake Ecological Economic Zone
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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 degrees 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 degrees 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.
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