Submission Title

Heavy Metal Content of Sediment in the Little Spokane River

Session Number

PS2

Location

Graves Gym

Abstract Number

PS2-o

Abstract

The Little Spokane River is one of the major tributaries of the Spokane River, which is primarily sourced by Lake Coeur d’Alene. The concentrations of lead, arsenic, cadmium, zinc, and iron in January sediment samples of the Little Spokane River were assessed in this study to provide baseline data. Sediment samples from three different cross-sections of the river were dried, homogenized, acid-digested, and analyzed using flame atomic absorption spectrometry (flame AAS). There were no measurable concentrations of lead and cadmium found in the sediment samples, while concentrations of arsenic (n = 8.81 +/- 0.48 mg/L), iron (n = 44.12 +/- 0.29 mg/L), and zinc (n = 0.38 +/- 0.02 mg/L) were present. The analyzed concentrations of heavy metals in the samples were all under the Washington Administrative Code’s sediment management standards.

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Apr 23rd, 1:30 PM Apr 23rd, 3:00 PM

Heavy Metal Content of Sediment in the Little Spokane River

Graves Gym

The Little Spokane River is one of the major tributaries of the Spokane River, which is primarily sourced by Lake Coeur d’Alene. The concentrations of lead, arsenic, cadmium, zinc, and iron in January sediment samples of the Little Spokane River were assessed in this study to provide baseline data. Sediment samples from three different cross-sections of the river were dried, homogenized, acid-digested, and analyzed using flame atomic absorption spectrometry (flame AAS). There were no measurable concentrations of lead and cadmium found in the sediment samples, while concentrations of arsenic (n = 8.81 +/- 0.48 mg/L), iron (n = 44.12 +/- 0.29 mg/L), and zinc (n = 0.38 +/- 0.02 mg/L) were present. The analyzed concentrations of heavy metals in the samples were all under the Washington Administrative Code’s sediment management standards.