Surface-Modified Sewage Sludge-Derived Carbonaceous Catalyst as a Persulfate Activator for Phenol Degradation

Meiling Han, Jin Zhang, Wen Chu, Gongfu Zhou and Jiahao Chen
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Meiling Han: College of Navigation, Dalian Maritime University, Dalian 116026, China
Jin Zhang: College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian 116026, China
Wen Chu: ACRE Coking & Engineering Consulting Corporation, MCC, Dalian 116085, China
Gongfu Zhou: College of Navigation, Dalian Maritime University, Dalian 116026, China
Jiahao Chen: College of Navigation, Dalian Maritime University, Dalian 116026, China

IJERPH, 2020, vol. 17, issue 9, 1-14

Abstract: In this study, a catalytic persulfate oxidation process comprising sodium persulfate (PS) and modified sewage sludge-derived carbonaceous catalysts was tested for the degradation of phenol. Sludge-based biochar was modified by high-temperature treatment combined with hydrochloric acid oxidation. The surface properties of carbonaceous catalysts before and after modification were characterized by elemental analysis, N 2 isothermal adsorption-desorption, scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The effects of reaction parameters including catalyst dosage, PS/phenol molar ratio, initial pH and reaction temperature on the degradation rate of phenol were investigated. The kinetics of phenol transformation was explored and the reaction rate appeared pseudo first-order kinetics. In SS-600-HCl/PS system, 91% phenol could be efficiently degraded under certain reaction conditions ([phenol] 0 = 100 mg/L, catalyst dosage = 0.8 g/L, PS/phenol molar ratio = 3/1, pH = 7, 25 °C) in 180 min. Thus, the results showed that the modified sewage sludge-derived carbonaceous catalyst had a better ability to activate PS for phenol degradation.

Keywords: sewage sludge; carbonaceous; persulfate; phenol; degradation (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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