Dissolved molybdenum

Shriadah et al. [516] determined molybdenum VI in seawater by densitometry after enrichment as the Tiron complex on a thin layer of anion exchange resin. There were no interferences from trace elements or major constituents of seawater, except for chromium and vanadium. These were reduced by the addition of ascorbic acid. The concentration of dissolved molybdenum (VI) determined in Japanese seawater was 11.5 pg/1, with a relative standard deviation of 1.1%. 

Prange, A. and K. Kremling. 1985. Distribution of dissolved molybdenum, uranium and vanadium in Baltic Sea waters. Mar. Chem. 16 259-274. 

Morris AW (1975) Dissolved molybdenum and vanadium in the northeast Atlantic ocean. Deep-Sea Res 22 49-54... 

The red solutions obtained by dissolving molybdenum sesquioxide or dioxide in aqueous hydrogen iodide were examined by Berzelius, but insufficiently to obtain definite conclusions. 

Rubidium Molybdate, RbjMo04, is prepared by dissolving molybdenum trioxide in a warm solution of rubidium hydroxide after evaiooration, and washing of the deliquescent mass with alcohol, wliite crusts of the normal salt remain. 

In our first approach, a nonradioactive, representative fission-product mixture was prepared, consisting of equal masses of the desired elements. An ammonium hydroxide solution was used to dissolve molybdenum trioxide, M0O3 this solution was added to an aqueous solution containing the nitrates of cerium, palladium, and rhodium. The resulting mixture was calcined at 500°C for 17 hours, then at 550°C for an additional seven hours. The solids from the calcination were powdered and added to a blended mixture consisting of the oxides of antimony, ruthenium, samarium, strontium, yttrium, and zirconium. Cesium was then added as cesium iodide niobium was added as potassium hexaniobate,... 

Preparation. Mimoun et at.1 prepared this complex of Mo05 and HMPT by dissolving molybdenum trioxide (M0O3, ROC/RIC, 50 g.) at 40° in 30 % H 202 (250 cc.). The yellow solution so obtained is cooled to 10° and HMPT (62.3 g.) is added with efficient stirring. A yellow precipitate is formed immediately and is collected on a filter and washed several times with ether. The dried material is crystallized twice from methanol it is obtained as yellow crystals in 84% yield. The French chemists showed that the complex has the structure shown in formula (1). 

Derivation Dissolving molybdenum trioxide in aqueous ammonia. 

Fig. 6.19 Vertical distribution of dissolved molybdenum and tungsten in the North Pacific.

FIGURE 13.1 Correlation of dissolved molybdenum and uranium versus salinity. Indicated bars refer to analytical precision open circles are hydrogen sulpbide-containing samples (Prange and Kremling, 1985). 

Prange, A., Kremling, K., 1985. Distribution of dissolved Molybdenum, Uranium and Vanadium in Baltic Seawaters. Marine Chemistry, 16, 259-274. 

Figure 1 (A) Dissolved vanadium in the North Pacific Ocean, 11 °N, 140°W. (Data from Collier RW (1979) Particulate and dissolved vanadium in the North Pacific Ocean. Nature 309 441 44.) (B) Dissolved molybdenum in the North Pacific Ocean, 30°N, 159°50 W. (Datafrom Sohrin Y, Isshiki K and Kuwamoto T (1987) Tungsten in North Pacific waters. Marine Chemistry22 95-103.) (C) Dissolved tungsten in the North Pacific Ocean, 30°N, 159°50 W. (Data from Sohrin Y, Isshiki Kand Kuwamoto T (1987) Tungsten in North Pacific waters. Marine Chemistry22-. 95-103.) (D) Dissolved rhenium in the North Pacific Ocean, 24°16 N, 169°32 W. (Data from Colodner D, Sachs J, Ravizza G, Turekian K, Edmond J and Boyle E (1993) The geochemical cycle of rhenium a reconnaissance. Earth and Pianetary Science Letters 117 205-221.)...

Chemical Processes Controlling Dissolved Molybdenum in Soils Speciation of Dissolved Molybdenum... 

Wang, L., Reddy, K. J., and Munn, L. C. (1994). Geochemcial modeling for predicting potential solid phases controlling the dissolved molybdenum in coal overburden. Powder River Basin, WY, U.S.A. Appl. Geochem. 9 37-43. 

Yamazaki, H., and Gohda, S. (1990), Distribution of dissolved molybdenum in the Seto Inland Sea, the Japan Sea, the Bering Sea and the Northwest Pacific Ocean. Geochem. J. 24 273-81. 

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