Anthropogenic Rare Earth Element in rivers: Gadolinium and lanthanum. Partitioning between the dissolved and particulate phases in the Rhine River and spatial propagation through the Rhine-Meuse Delta (the Netherlands)

•We report for the first time lanthanum and gadolinium anomalies at catchment scale.•Partitioning of their anthropic contents between dissolved and particulate phases.•Anthropogenic lanthanum (LaANTHRO) is mainly present in the particulate phase.•Anthropogenic gadolinium (GdANTHRO) is mainly present in the dissolved phase.