Table 4 Summary of WET-test results. Details on the method and results of the WET-tests conducted with runoff samples from highway E18, Sweden and highway A61, Germany and a surface water sample near highway A2, the Netherlands can be found in the technical reports [97,98,99]. Some endpoints are not available (n.a.), when effect parameters are too low to enable calculation. The concentration is expressed in % sample in test solution
From: Environmental risks of car tire microplastic particles and other road runoff pollutants
Test | Endpoint | Sample | ||
|---|---|---|---|---|
Runoff, Germany | Runoff, Sweden | Surface water, the Netherlands | ||
Bacteria | Effect | 8.68% effecta at highest conc. (45%) | 7.06% effecta at highest conc. (45%) | no effects |
EC50 | > 45% | > 45% | > 45% | |
NOEC | n.a. | n.a. | n.a. | |
Algae | Effect | 84% effect at lowest conc. (31.6%) | 35% effect at highest conc. (100%) | 6% effecta at highest conc. (100%) |
EC50 | < 31.6% | > 96% | > 96% | |
NOEC | < 31.6% | 42.2% | n.a. | |
Crustacea | Effect | 0% effecta in highest conc. (100%) | 10% effect in highest conc. (100%) | 10% effecta in highest conc. (100%) |
EC50 | > 100% | > 100% | > 100% | |
NOEC | n.a. | n.a. | n.a. | |