Hydroxylamine driven advanced oxidation processes for water treatment: A review

• Published in: Chemosphere (Oxford) Vol. 262; p. 128390
• Main Authors: Duan, Jiebin, Pang, Su-yan, Wang, Zhen, Zhou, Yang, Gao, Yuan, Li, Juan, Guo, Qin, Jiang, Jin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2021
• Subjects: Direct oxidation; Heterogeneous Fe/cu-Fenton/Fenton-like system; Homogeneous Fe/cu-Fenton/Fenton-like system; Hydroxylamine (HA); Pollutants elimination; Pollutants elimination; Direct oxidation; Homogeneous Fe/cu-Fenton/Fenton-like system; Hydroxylamine (HA); Heterogeneous Fe/cu-Fenton/Fenton-like system
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2020.128390

Hydroxylamine (HA) driven advanced oxidation processes (HAOPs) for water treatment have attracted extensive attention due to the acceleration of reactive intermediates generation and the improvement on the elimination effectiveness of target contaminants. In this review, HAOPs were categorized into three parts: (1) direct reaction of HA with oxidants (e.g., hydrogen peroxide (H2O2), peroxymonosulfate (PMS), ozone (O3), ferrate (Fe(VI)), periodate (IO4−)); (2) HA driven homogeneous Fenton/Fenton-like system (Fe(II)/peroxide/HA system, Cu(II)/O2/HA system, Cu(II)/peroxide/HA system, Ce(IV)/H2O2/HA system); (3) HA driven heterogeneous Fe/Cu-Fenton/Fenton-like system (iron-bearing material/peroxide/HA system, copper-bearing material/peroxide/HA system, bimetallic composite/peroxide/HA system). Degradation efficiency of the target pollutant, reactive intermediates, and effective pH range of various HAOPs were summarized. Further, corresponding reaction mechanism was elaborated. For the direct reaction of HA with oxidants, improvement of pollutants degradation was achieved through the generation of secondary reactive intermediates which had higher reactivity compared with the parent oxidant. For HA driven homogeneous and heterogeneous Fe/Cu-Fenton/Fenton-like system, improvement of pollutants degradation was achieved mainly via the acceleration of redox cycle of Fe(III)/Fe(II) or Cu(II)/Cu(I) and subsequent generation of reactive intermediates, which avoided the drawbacks of classical Fenton/Fenton-like system. In addition, HA driven homogeneous Fe/Cu-Fenton/Fenton-like system with heterogeneous counterpart were compared. Further, formation of oxidation products from HA in various HAOPs was summarized. Finally, the challenges and prospects in this field were discussed. [Display omitted] •Mechanism and efficiency of direct reaction between HA and oxidants for pollutants elimination are elucidated.•HA driven homogeneous and heterogeneous Fe/Cu-Fenton/Fenton-like system are summarized.•Formation of oxidation products from HA is discussed.