“…The sodium hydroxide pretreatment at low concentration (SH-C1) generated the second highest TOC (1521 mg/l) and NPOC (1317 mg/l) values. The lower TOC associated with the NaOH pretreatment at high concentration may be attributed to a salting-out effect resulting in the re-polymerization of previously solubilized compounds (Nishiumi et al, 2010). The catalyzed hydrogen peroxide pretreatments generated the lowest TOC, NPOC and POC regardless of concentration.…”
Section: Coal Pretreatmentsmentioning
confidence: 96%
“…These results suggest that the aromatic/ PAH fraction contributes more to the TOC. The low TOC yield from the high concentration pretreatments may result from the saltingout effect (Nishiumi et al, 2010) and repolymerization. As the reaction proceeds the humic acid experienced additional decomposition to benzene-polycarboxylic acids.…”
“…The sodium hydroxide pretreatment at low concentration (SH-C1) generated the second highest TOC (1521 mg/l) and NPOC (1317 mg/l) values. The lower TOC associated with the NaOH pretreatment at high concentration may be attributed to a salting-out effect resulting in the re-polymerization of previously solubilized compounds (Nishiumi et al, 2010). The catalyzed hydrogen peroxide pretreatments generated the lowest TOC, NPOC and POC regardless of concentration.…”
Section: Coal Pretreatmentsmentioning
confidence: 96%
“…These results suggest that the aromatic/ PAH fraction contributes more to the TOC. The low TOC yield from the high concentration pretreatments may result from the saltingout effect (Nishiumi et al, 2010) and repolymerization. As the reaction proceeds the humic acid experienced additional decomposition to benzene-polycarboxylic acids.…”
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