Table 1.

^•OH scavenging of nitrogen species post-RO (pH 5.5).

Species	Concentration	k•OH (M − 1s − 1)	Contribution to •OH scavenging	Refs.
Free chlorine	3 mg/L as Cl2	2.0 × 109 HOCl, 8.8 × 109 OCl−	71%	2006 Anastasio and Matthew, 2006
Monochloramine	2 mg/L as Cl2	1.0 × 109	23%	Anastasio and Matthew, 2006
Dichloramine	1.5 mg/L as Cl2	6.2 × 108	6%	Anastasio and Matthew, 2006
Nitrate	0.8 mg/L as N	4.0 × 105b	< 1%	Yin et al. 2020b
Nitrite	Variablea	1.1 × 1010	Variablea	Yin et al., 2020

M ^− 1s⁻¹ = per molar per second.

^aNitrite is likely to be present only in some systems with UV-H₂O₂, since free chlorine quickly converts nitrite to nitrate.

^bThis reaction rate coefficient is reported in a secondary source from an ambiguous primary source, but evidence suggests that the rate is negligible.