Molybdenum

Adriano, D. C.

doi:10.1007/978-1-4757-1907-9_10

Cited by 1 publication

(1 citation statement)

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“…Our data supports the laboratory results of Goldberg et al (1996) who found negligible adsorption of Mo on calcite and calcareous soils over a broad pH range (3–10). However, some researchers have stated that Mo sorption on calcite increases with liming and Mo may form precipitates and coprecipitates with calcite (Adriano, 1986; Kabata‐Pendias and Pendias, 1992).…”

Section: Resultsmentioning

confidence: 99%

Trace Element Retention and Release on Minerals and Soil in a Constructed Wetland

Fox

Doner

2002

J of Env Quality

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Constructed wetlands are one method under investigation for the remediation of trace element-contaminated agricultural drainwater. A greater understanding of the retention of trace elements by the bulk soil and soil constituents is necessary for their safe and effective use. To determine the capacity of soil, calcite, and goethite-coated quartz sand for retention of As, Mo, and V under field conditions, an in situ method was used whereby permeable bags containing those minerals were placed near the sediment surface of a flow-through constructed wetland for 3 or 12 mo. Accumulations of As, Mo, and V occurred on goethite-coated sand. Concentrations of Mo on goethite-coated sand were much higher in samples from a wetland cell with a water depth of 15 cm (38.23 +/- 7.27 mg kg(-1)) compared with those from a cell with a water depth of 3 cm (8.30 +/- 1.45 mg kg(-1)). Calcite sorbed no As and low amounts of Mo and V, indicating that it is not an important sink for those elements under these conditions. In soil bags, total As and V concentrations showed little change over 12 mo. Molybdenum accumulated in the soil bags, resulting in total concentrations (12 mo) of 27.22 +/- 2.69 mg kg(-1) and 11.42 +/- 1.35 mg kg(-1) at water depths of 15 and 3 cm, respectively. Nearly half of the Mo accumulation on soil became water soluble after air-drying. This has important implications for systems that may undergo changes in redox status, possibly resulting in large fluxes of water-soluble Mo.

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Section: Resultsmentioning

confidence: 99%