Methyltriphenylphosphonium bromide

Biodegradation in water and sediment: simulation tests

Administrative data

Endpoint:

biodegradation in water and sediment: simulation testing, other

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference

Reference Type:

publication

Title:

Quaternary (triphenyl-) phosphonium compounds: Environmental behavior and toxicity

Author:

Simon Brand, Michael P. Schlüsener, Dinah Albrecht, Uwe Kunkel, Claudia Strobel, Tamara Grummt, Thomas A. Ternes

Year:

2018

Bibliographic source:

Water Research 136 (2018) 207-219

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

A defined amount of substance was spiked to a vessel with sediment and water, and aliquots of both phases were analyzed after workup. The amounts of substance quantified in water and sediment extract were summed up and divided by the amount of substance initially spiked into the experiment vessel to determine the recovery rate, which should decrease over the course of the experiment if a degradation of the substance takes place.

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Methyltriphenylphosphonium bromide

EC Number:

217-218-9

EC Name:

Methyltriphenylphosphonium bromide

Cas Number:

1779-49-3

Molecular formula:

C19H18P.Br

IUPAC Name:

methyl(triphenyl)phosphonium bromide

Test material form:

solid

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source: Sigma-Aldrich
- Purity: 98%

Radiolabelling:

no

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

natural sediment: freshwater

Details on source and properties of surface water:

- Details on collection (e.g. location, sampling depth, contamination history, procedure): origin: small stream Waschbach near Eschzell in October 2016

Details on source and properties of sediment:

- Details on collection (e.g. location, sampling depth, contamination history, procedure): Sediment from the river Rhine near Koblenz-Ehrenbreitstein collected in October 2016;
- TOC (%): 4.35

Duration of test (contact time):

100 d

Initial test substance concentration

Initial conc.:

other: 25 µg per vessel

Based on:

test mat.

Parameter followed for biodegradation estimation:

test mat. analysis

Results and discussion

Any other information on results incl. tables

Recovery rates for Tehyltriphenylphosphonium bromide remained constant at about 70–80%, which indicates that it was not degraded, but rather persistent under test conditions (loss in the mass balance probably due to the formation of non-extractable residues). Additionally, concentrations found in the sediment extracts were significantly higher than in the water phase.