Five-percent nitric acid leach

Knowledge graph centered on Five-percent nitric acid leach with 67 nodes and 143 connections. Top connected: groundwater hydrology, evapotranspiration, Underground aquifer, ferric hydroxide precipitation, Reactive transport modeling.

Method synopsis

Standard procedure for extracting uranium and metals from solid phase sediments using 5% nitric acid with end-over-end rotation for determination of total leachable concentrations.

Synthesized from method descriptions across 2 papers using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Column-Test Data Analyses and Geochemical Modeling to Determine Uranium Reactive Transport Parameters at a Former Uranium Mill Site (Grand Junction, Colorado) (2022), Minerals. Implementations in other papers (listed below) may differ.

1. Five-percent nitric acid extractions
   Five-percent nitric acid extractions were completed on all column materials before and after the column tests. This procedure used 2 g of sieved and dried solid phase rotated end-over-end with 100 milliliters of unheated 5% nitric acid extraction fluid and a contact time of 4 h, followed by a second round of 40 mL of extraction fluid for 0.5 h. Extraction fluids were analyzed for uranium, iron, manganese, and calcium using the analytical procedures for column effluent water.
   Quantities: 2 g solid phase, 100 mL + 40 mL extraction fluid, 4 h + 0.5 h contact timesDuration: 4 h first round, 0.5 h second roundConditions: End-over-end rotation, unheated extraction fluid
   Equipment: 5% nitric acid extraction fluid

Typical Equipment

• 5% nitric acid extraction fluid

Output Measurements

• solid-phase uranium concentrations
• iron
• manganese
• calcium

Papers Using This Protocol (2)

Places Where Used