Journal
ENVIRONMENTAL TECHNOLOGY
Volume 43, Issue 2, Pages 192-198Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2020.1782994
Keywords
Mesoporous carbon material; persulfate oxidation; 4-chlorophenol; N-doped; catalysis
Categories
Funding
- National Natural Science Foundation [41572217]
- National Water Pollution Control and Treatment Science and Technology Major Project [2018ZX07109-003]
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In this study, the influence of nitrogen-doped and non-doped mesoporous carbon materials (NCMK-3 and CMK-3) on the persulfate (PS) oxidation of 4-chlorophenol (4CP) in water was investigated. The results showed that both NCMK-3 and CMK-3 facilitated the removal of 4CP from water. NCMK-3 exhibited better performance compared to CMK-3. NCMK-3 influenced the thermodynamic process and exhibited a synergistic effect in the removal of the organic contaminant from water.
Persulfate (PS) oxidation of 4-chlorophenol (4CP) is mostly catalysed by relatively expensive metal substrates. In this study, we investigated the influence of nitrogen-doped and non-doped mesoporous carbon materials (NCMK-3 and CMK-3) during persulfate (PS) oxidation of 4CP in water. Batch experiments were conducted such that PS was added to simulated contaminant mixture after 1 h agitation with NCMK-3 and CMK-3. Further, the experiment was carried out at different temperatures, pH ranges, concentrations of persulfate (PS), and different doses of NCMK-3, since it recorded better removal rates compared to CMK-3. The results revealed that NCMK-3 and CMK-3 aided the removal of 4CP from water during persulfate oxidation. When persulfate was added after an hour of equilibration with CMK-3 and NCMK-3, 83% and 92% of 4CP were removed within 20 min, respectively, whereas lower removal rates (<= 40) were recorded in the absence of persulfate (PS). The removal rates of 4CP increased with an increase in temperature but reduced in the alkaline medium in the NCMK-3/PS system. The efficiency of the NCMK-3 reduced significantly after it was reused three times. Based on the results, NCMK-3 influences the activity of PS oxidation of 4-chlorophenol (4CP) and exhibited a synergistic effect in the removal of the organic contaminant from water.
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