Verhalten von aus Baustoffen ausgelaugten Bioziden bei der Bodenpassage

Johann, Sabine; Schwerd, Regina; Scherer, Christian

doi:10.1002/bapi.201800006

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…A number of transformation products were detected by LC-MS and LC-HRMS in photolysis experiments in which we exposed aqueous solutions of terbutryn, TBOH, TBOH-DesE, TB-DesE, TBSO, and terbumeton (each as a single substance in water) to UV radiation at either 254 nm or to a spectrum with its maximum at 350 nm for 48 h. In addition to the investigated substances, detected mass signals correspond to terbutryn transformation products that were previously reported: desbutyl-terbutryn [1], desthiomethylterbutryn [9], desthiomethyl-desethyl-terbutryn [9], desthiomethyl-desbutyl-terbutryn [9], desbutyl-2-hydroxy-terbutryn [9], 2,4-diamino-1,3,5-triazin [21], 2-hydroxy-4,6-diamino-1,3,5-triazin [22], and terbutryn-TP-210 [1]. Desethyl-terbumeton is mentioned as a transformation product of terbumeton [23].…”

Section: Terbutryn and Transformation Products In Paint Extractssupporting

confidence: 66%

“…Studies of transformation products of diuron in runoff from construction products have considered mainly DCPMU and DCPU. So far, the occurrence of 3-(4-chloro-3-hydroxyphenyl)-1,1-dimethylurea, 3-(3-chloro-4-hydroxyphenyl)-1,1-dimethylurea in runoff [1] and in eluates from façade coatings [22] was also reported. Repeated analysis of the extracts from the white paint after long-term storage indicated that dichloroaniline and monuron were also formed during the experiments.…”

Section: Diuron and Transformation Products In Paint Extractsmentioning

confidence: 99%

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Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions

Schoknecht

Mathies

Lisec

2021

Water

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Stormwater from urban areas can transport biocidally active substances and related transformation products from buildings into the environment. The occurrence of these substances in urban runoff depends on the availability of water, and on ultraviolet radiation exposure that causes photolytic reactions. In a systematic laboratory study, painted test specimens were exposed to either ultraviolet radiation, water contact, or a combination of both. Leaching of the biocidally active substances carbendazim, diuron, octylisothiazolinone, terbutryn, and selected transformation products of terbutryn and diuron were observed under various exposure conditions. Remaining concentrations of these substances in the paint were quantified. It was demonstrated that the distribution of active substances and transformation products in eluates and in the coatings themselves differs with exposure conditions. Strategies for environmental monitoring of biocide emissions need to consider the most relevant transformation products. However, environmental concentrations of biocidally active substances and transformation products depend on earlier exposure conditions. As a consequence, monitoring data cannot describe emission processes and predict expected leaching of biocidally active substances from buildings if the data are collected only occasionally.

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Section: Terbutryn and Transformation Products In Paint Extractssupporting

confidence: 66%

Section: Diuron and Transformation Products In Paint Extractsmentioning

confidence: 99%

Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions

Schoknecht

Mathies

Lisec

2021

Water

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“…It is slowly degraded by hydrolysis and biodegradation with a half-life of a month up to a year (Giacomazzi and Cochet, 2004). Johann et al (2018) showed an increase of sorption of diuron in the soil passage with an increase of organic matter. Bollmann et al (2017a) estimated a half-life of diuron of more than 2500 days in soil.…”

Section: Introductionmentioning

confidence: 99%

Sources and pathways of biocides and their transformation products in urban water infrastructure of a 2 ha urban district

Linke¹,

Olsson²,

Preusser³

et al. 2021

Preprint

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Abstract. Biocides used in film protection products leaching from facades are known to be a potential threat for the environment. This study identifies individual sources and entry pathways in a small-scale urban area. We investigate emissions of commonly used biocides (terbutryn, diuron and octylisothiazolinone (OIT)) and some of their transformation products (TPs; diuron-desmethyl, terbumeton, terbuthylazin-2-hydroxy and terbutryn-desethyl) from a 2 ha residential area, 13 years after construction has ended. Sampling utilizes existing urban water infrastructure representative for decentralized storm water management in central and northern Europe and applies a two-step approach to (a) determine the occurrence of biocides above water quality limits (i.e. predicted no effect concentration, PNEC) and (b) identify source areas and characterize entry pathways into surface- and groundwater. Monitoring focuses on the analysis of selected biocides and TPs by LC-MS/MS in water samples taken from facades, rainwater pipes, drainage and storm water infiltration systems. In standing water in a swale we found high concentrations of diuron (174 ng L−1) and terbutryn (40 ng L−1) above PNEC for surface water. We confirmed expected sources, i.e. facades, but sampling of rain downpipes from flat roofs identified additional sources of all biocides and two TPs of terbutryn and one TP of diuron. Diuron and terbutryn were found in three drainage pipes representing different entry pathways of biocides. In one drainage pipe collecting road runoff only diuron-desmethyl and terbutryn-desethyl were detected. In two other drainage pipes collecting infiltrated water through soil additionally terbuthylazin-2-hydroxy was detected. Concentration of terbutryn and two of its TPs (terbutryn-desethyl and terbuthylazin-2-hydroxy) were highest in one of the pipes collecting infiltrated water through soil which suggests a high leaching potential of this biocide. This study shows that target-oriented monitoring of urban water infrastructure for biocides and their TPs allows for a better identification of biocide emissions into urban aquatic environments.

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Discharge and fate of biocide residuals to ephemeral stormwater retention pond sediments

et al. 2022

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Biocides used in paints and renders prevent algae and fungi growth but can wash off during wind-driven rain and enter urban environments. Retention ponds represent part of stormwater management that retain water and partly pollutants. However, it is poorly understood which percentage of biocides leached from facades reaches a pond and how efficiently biocides are retained inside ponds although biocides can have harmful environmental effects. Here, we combined measurements and modeling to address diffuse biocide loss and a pond's retention capacity in a delimited residential area of 3 ha, with detached houses connected to an ephemeral retention pond. Six stormwater events were sampled within 2 years and confirmed biocidal residuals at pond inflow. Model results revealed that during the sampled events only 11% of terbutryn leachate arrived at the pond while the major part of this biocide was diffusely lost in the residential area. Measured low terbutryn concentrations in the sediment (mean 2.6 ng g−1) confirmed this result. Model results suggested that approximately 50% of terbutryn reaching the pond were retained and degraded. Our results are site-specific but suggest that biocide retention in ponds is limited, environmental entry pathways are diverse and that biocide use should be limited at its source.

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Verhalten von aus Baustoffen ausgelaugten Bioziden bei der Bodenpassage

Cited by 4 publications

References 13 publications

Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions

Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions

Sources and pathways of biocides and their transformation products in urban water infrastructure of a 2 ha urban district

Discharge and fate of biocide residuals to ephemeral stormwater retention pond sediments

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