Improvement of Biodegradable Biocide’s Activity of Peroxyacetic Acid Basis Using Surfactants: Characterization and Stability

Esther Asensio,Cristina Nerín,Fernando Sanagustín,Milton Rosero-Moreano

doi:10.1155/2015/150206

Esther Asensio, Cristina Nerín + Show 2 more

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https://doi.org/10.1155/2015/150206

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Abstract

This paper deals with the study of the kinetics decomposition reaction of the peroxyacetic acid under influence of surfactant additives. The peroxyacetic acid shows a decomposition rate of 1.70×10−3 h−1and its activation energy is 66 kJ mol−1. The influence of temperature on the reaction of spontaneous decomposition of peroxyacetic acid was studied at two seasonal periods. Peroxyacetic acid standard and four prototypes of biocide samples with known concentration of peroxyacetic acid and hydrogen peroxide were studied. Finally, a factorial analysis ANOVA was carried out to establish significant differences (p<0.003) between the four biocide samples over time with respect to peroxyacetic acid and hydrogen peroxide concentration. From the study carried out, it can be concluded that the biocide with surfactant substances in its composition offers the best stability and its difference versus the other biocides may guarantee a better behaviour.

Highlights

The use of peroxyacetic acid (PAA) as sanitizer in agricultural [1, 2] and medical environments [3, 4], water and wastewater industry [5], food processing, beverage, and medical and pharmaceutical industries [5] has increased due to its efficient biocide effect: bactericidal [6], virucidal [7], and fungicidal and sporicidal [8] effectiveness, wide range of pH application [9,10,11], and absence of halogenated persistent by-products [12]
The results show good linearity for both compounds under study and with the signal/noise ratio of the chromatograms corresponding to the blank and the first point on the calibration curve (0.023 mmol L−1 for PAA and 0.008 mmol L−1 for hydrogen peroxide (HP)) the detection and quantifications limits were calculated
The simultaneous determination by High Performance Liquid Chromatography (HPLC) of PAA and HP is possible and reliable to assess the decomposition of these compounds in biocide samples

Summary

Introduction

The use of peroxyacetic acid (PAA) as sanitizer in agricultural [1, 2] and medical environments [3, 4], water and wastewater industry [5], food processing, beverage, and medical and pharmaceutical industries [5] has increased due to its efficient biocide effect: bactericidal [6], virucidal [7], and fungicidal and sporicidal [8] effectiveness, wide range of pH application [9,10,11], and absence of halogenated persistent by-products [12]. The common commercial sanitizer biocide samples based on PAA contain acetic acid (10% v/v), hydrogen peroxide (HP) (25% v/v), and peroxyacetic acid (5% v/v), with specific gravity being 1.10 [16]. To assess the decomposition rate of their main components such as peroxyacetic acid and hydrogen peroxide, several methods have been developed and among them, double step titration [20], spectrophotometric methods [21,22,23], enzymatic methods [24], gas chromatography [25], liquid chromatography [26], simultaneous spectra-kinetic determination [27], and flow injection analysis (FIA) method [28] can be mentioned. The chosen method for this assessment study based on liquid chromatography has the advantage of the simultaneous determination of PAA and HP with only one previous derivatization reaction. The quantitative reaction of PAA with methyl p-tolyl sulphide (MTS) and the HP with triphenylphosphine (TPP) yields the corresponding methyl p-tolyl sulfoxide (MTSO) and triphenylphosphine oxide (TPPO), according to Pinkernell et al [26]

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