Synergizing electron transfer with singlet oxygen to expedite refractory contaminant mineralization in peroxymonosulfate based heterogeneous oxidation system

被引：32

作者：

Huang, Yun-Xin ^{[2
]}

Chen, Ke-Yu ^{[2
]}

Wang, Shi-Xu ^{[2
]}

Zhao, Shou-Yan ^{[2
]}

Yu, Lin-Qian ^{[2
]}

Huang, Bao-Cheng ^{[1
,2
]}

Jin, Ren-Cun ^{[1
,2
]}

机构：

[1] Hangzhou Normal Univ, Sch Engn, Hangzhou 310018, Peoples R China

[2] Hangzhou Normal Univ, Sch Life & Environm Sci, Hangzhou 311121, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2024年 / 341卷

基金：

中国国家自然科学基金;

关键词：

Peroxymonosulfate; Non-radical oxidation; Electron transfer pathway; Singlet oxygen; Wastewater treatment; CARBON NANOTUBES; BASIS-SETS; DEGRADATION; ACTIVATION; DICLOFENAC; RADICALS; KINETICS; DESIGN;

D O I：

10.1016/j.apcatb.2023.123324

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This work explored the feasibility of synergizing singlet oxygen (1O2) and electron transfer pathway (ETP) during catalytic decomposition of peroxymonosulfate to advance the refractory pollutant mineralization. N doping strategy was employed to synthesize Mn-C-N catalyst with two independent catalytic sites. The results showed that the contribution of 1O2 and ETP to diclofenac removal could be well matched to 56% and 44% in Mn-C-N/ PMS oxidation system, respectively. Mechanism studies revealed that 1O2 would generate intermediate products with low ELUMO, which were rapidly transformed via ETP and finally resulted in improved mineralization per-formance. Under 0.2 g/L Mn-C-N, 50 mg/L diclofenac, 0.4 g/L peroxymonosulfate, and actual water quality conditions, about 100% removal (15 min) and 70% mineralization efficiency (1 h) was achieved. The above non-radical oxidation system was effective for treating livestock wastewater and secondary effluent. This work prospects the synergy of non-radicals for remediating refractory contaminants-laden wastewater.

引用

页数：11