Winter Maintenance Wash-Water Heavy Metal Removal Pilot Scale Evaluation

Table 4

Summarization of settling times for the significant particle sizes of copper and zinc for depths most similar to settling tanks located at ODOT garages (2 m-3 m). Times are computed using Stokes law and the dynamic viscosity of water is assumed to be 0.001519 kg/m-s (4.4°C). Settling times are in hours.

Metal	5 µm		3 µm
	2 m	3 m	2 m	3 m
Copper	7.8	11.7	21.6	32.4
Zinc	10.1	15.1	28.0	42.0