EFFECTS OF PH, TEMPERATURE, IONIC STRENGTH AND ORGANIC MATTER ON TRICLOCARBAN SOLUBILITY

Ion Ion,Alina Catrinel Ion,Georgeta Ramona Ivan,Luiza Capra

doi:10.3846/jeelm.2021.14638

Abstract

The solubility of triclocarban in ultrapure water and in several natural aqueous solutions is influenced by several environmental factors. In this study the variation of temperature, pH, ionic strength and concentration of the organic matter over the solubility of triclocarban was analysed. The results show that the solubility of triclocarban increases by increasing the contact time, longer than the time of equilibrium and the temperature. It is less influenced by the variations of pH and strongly influenced by the variation of ionic strength and by the natural organic matter into the studied aqueous matrices.

Highlights

Triclocarban (TCC, 3,4,4’-trichlorocarbanilide, C13H9Cl3N2O) is used as an antimicrobial agent in disinfectants, detergents, deodorants and cosmetics (INERIS, 2016; Ding et al, 2015)
The results show that the solubility of triclocarban increases by increasing the contact time, longer than the time of equilibrium and the temperature
The experiments over TCC solubility were performed at three temperatures, in aqueous solutions, the following influences being studied: temperature (5, 25 and 40 °C); contact time, at 25 °C; pH at 25 °C; ionic strength; concentration of natural organic matter NOM (10, 50 and 100 mg/L humic acid) and chemical composition of the natural water

Summary

Introduction

Triclocarban (TCC, 3,4,4’-trichlorocarbanilide, C13H9Cl3N2O) is used as an antimicrobial agent in disinfectants, detergents, deodorants and cosmetics (INERIS, 2016; Ding et al, 2015). TCC is added in cosmetics and in pharmaceutical disinfectants in concentrations of up to a maximum 0.2% (Council Directive, 1976). Available data indicate that triclocarban is mainly found in natural systems, in the aquatic environment (Aris et al, 2020; Wanga et al, 2020; Kennedy et al, 2015) and especially in sediments due to its hydrophobic character (Halden & Paull, 2005). The concentration of TCC in wastewater is 0.4–50 μg/L, as indicated by (Halden & Paull, 2004; Snyder et al, 2010)

Methods

Results

Conclusion