Triclosan in a North Texas wastewater treatment plant and the influent and effluent of an experimental constructed wetland

Abstract

The antimicrobial triclosan was analyzed in unfiltered samples from influent, effluent, and receiving stream and before and after a pilot-scale constructed wetland at a North Texas municipal wastewater treatment plant. Triclosan concentrations were reduced by 97 to 99% by the activated sludge treatment plant. Effluent concentrations were further reduced by passage through the constructed wetland, but receiving stream concentrations were not statistically significantly different from effluent concentrations. Effluent concentrations of triclosan were seasonal with highest concentrations occurring during the summer months. The effluent-dominated receiving stream maximum concentrations during summer months were below reported algal no-observed-effect concentrations based on biomass and growth rate but exceeded concentrations reported to cause shifts in algal community structure.

Basin-scale emission and multimedia fate of triclosan in whole China

“…For the emission of TCS to the receiving environment, the pathways into the water and soil compartments were considered. Since sewage is the main carrier for TCS, the TCS incorporated in the sewage from urban population can be mostly removed in WWTPs before it enters into surface water (Halden 2014;Halden and Paull 2005;Lozano et al 2013;Waltman et al 2006). But, for the TCS in sewage from rural population, it is assumed that the sewage is directly discharged into the receiving environment without treatment based on the report by Ministry of Environmental Protection of China (GOSC 2012).…”

Seasonal and Diurnal Fluctuations in the Concentrations of Pharmaceuticals and Personal Care Products (PPCPs) in Residential Sewage Water

“…However, in sewage water, the recovery rate for all compounds except acetaminophen was about half at 42 ± 9%. Recovery rates have also been low in most previous studies 1,6,7) on PPCPs concentrations in sewage. This can be explained by matrix suppression.…”

“…Previous studies have reported the matrix suppression with the analysis of PPCPs in water samples. 1,6,7) In addition, this is thought to be because sewage water contains various contaminants, and most PPCPs are amphoteric compounds, but details are unknown. However, in the present study, it was necessary to ascertain the concentration order of PPCPs in sewage water, and as a result, instead of measuring the recovery rate for each compound, the concentration of each compound was calculated by the absolute calibration curve method.…”

“…In recent years, many reports have documented minute amounts of pharmaceuticals and personal care products (PPCPs) in river water 1,2) and water discharged from sewage plants, [2][3][4][5][6][7] however, the effects of these PPCPs in the environment, on wildlife and humans have not been fully elucidated. Since PPCPs are chemical compounds that are commercially developed for their effects on the human body, it is possible that they also affect wildlife to some degree.…”

Multimedia modeling of the fate of triclosan and triclocarban in the Dongjiang River Basin, South China and comparison with field data

“…Triclosan (5-chloro-2-[2,4-dichlorophenoxy]-phenol; TCS) and triclocarban (3,4,4 0 -trichlorocarbanilide; TCC) are commonly used as bactericidal additives in various personal care products (PCPs), such as shampoo, toilet soap and toothpaste. 1,2 The contents of TCS and TCC in these products usually range from 0.1-0.3% and 0.5-5% (w/w), respectively.…”