Facile preparation of coprecipitates between iron oxides and dissolved organic matter for efficient Fenton-like degradation of norfloxacin

Huali Yu; Guangfei Liu; Lingyu Shen; Ruofei Jin; Jiti Zhou; Haiyan Guo; Lianfeng Wang

doi:10.1016/j.jhazmat.2022.130394

Facile preparation of coprecipitates between iron oxides and dissolved organic matter for efficient Fenton-like degradation of norfloxacin

J Hazard Mater. 2023 Feb 15;444(Pt A):130394. doi: 10.1016/j.jhazmat.2022.130394. Epub 2022 Nov 15.

Authors

Huali Yu¹, Guangfei Liu², Lingyu Shen³, Ruofei Jin⁴, Jiti Zhou⁴, Haiyan Guo⁵, Lianfeng Wang⁵

Affiliations

¹ School of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116021, China; Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
² Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China. Electronic address: guangfeiliu@dlut.edu.cn.
³ Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China; National Marine Environmental Monitoring Center, Dalian 116023, China.
⁴ Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
⁵ School of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116021, China.

PMID: 36403446
DOI: 10.1016/j.jhazmat.2022.130394

Abstract

As two important components of dissolved organic matter (DOM), dissolved black carbon (DBC) and humic acid (HA) possess different chemical and structural properties, which might influence their activities like metal complexation and mediating electron transfer. In this study, a series of coprecipitates of iron oxides (FeO_x) and DOM (HA or DBC) having different C/Fe molar ratios (0.2-3.0) was prepared under ambient conditions, which exhibited excellent catalytic efficiencies upon Fenton-like degradation of norfloxacin (NOR). Pseudo-first-order rate constant of NOR oxidation catalyzed by DBC-FeO_x (C/Fe=3.0, 1.13 h^-1) was 30.5, 4.3-14.2, and 1.3-15.7 folds higher than those mediated by FeO_x alone, HA-FeO_x and DBC-FeO_x coprecipitates having C/Fe molar ratios of 0.2 and 1.6, respectively. Due to the higher concentrations of surface-bound Fe(III)/Fe(II) in the DBC-FeO_x mediated systems, improved Fe(III)/Fe(II) cycling rates, •OH accumulation and NOR degradation were observed as compared with those of counterpart systems mediated by HA-FeO_x. Besides functioning in Fe-C complexation to accelerate FeOOH cleavage, carbonyl/carboxyl groups of the coprecipitates also serve as electron shuttles, both of which improved Fe(III)/Fe(II) cycling and •OH production. Our findings emphasized the influence of DOM source and compositions on Fe(III)/Fe(II) cycling and provided a facile approach of preparing Fe-C catalyst for contaminants elimination.

Keywords: Coprecipitates; Dissolved black carbon; Fenton-like reactions; Humic acid; Norfloxacin.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Dissolved Organic Matter
Ferric Compounds*
Ferrous Compounds
Iron
Norfloxacin*
Oxides
Soot

Substances

Norfloxacin
ferric oxide
Ferric Compounds
Dissolved Organic Matter
Soot
Ferrous Compounds
Oxides
Iron