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4350892 
Journal Article 
Review 
Thermodynamic properties of an emerging chemical disinfectant, peracetic acid 
Zhang, C; Brown, PJB; Hu, Z 
2018 
1 
Science of the Total Environment
ISSN: 0048-9697
EISSN: 1879-1026 
621 
948-959 
English 
29191692 
Peracetic acid (PAA or CH3COOOH) is an emerging disinfectant with a low potential to form carcinogenic disinfection by-products (DBPs). Basic thermodynamic properties of PAA are, however, absent or inconsistently reported in the literature. This review aimed to summarize important thermodynamic properties of PAA, including standard Gibbs energy of formation and oxidation-reduction (redox) potential. The standard Gibbs energies of formation of CH3COOOH(aq), CH3COOOH(g), CH3COOOH(l), and CH3COOO(aq)- are -299.41kJ·mol-1, -283.02kJ·mol-1, -276.10kJ·mol-1, and -252.60kJ·mol-1, respectively. The standard redox potentials of PAA are 1.748V and 1.005V vs. standard hydrogen electrode (SHE) at pH 0 and pH 14, respectively. Under biochemical standard state conditions (pH 7, 25°C, 101,325Pa), PAA has a redox potential of 1.385V vs. SHE, higher than many disinfectants. Finally, the environmental implications of the thermodynamic properties of PAA were systematically discussed. Those properties can be used to predict the physicochemical and biological behavior of aquatic systems exposed to PAA. 
; byproducts; disinfectants; disinfection; electrodes; energy; hydrogen; pH; peracetic acid; redox potential; thermodynamics/