Solubility, Sorption, and Soil Respiration Effects of Tungsten and Tungsten Alloys

Dermatas, Dimitris; Braida, Washington; Christodoulatos, Christos; Strigul, Nikolay; Panikov, Nikolay; Los, Michael; Larson, Steven L.

doi:10.1080/15275920490423980

Cited by 100 publications

(100 citation statements)

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“…Thus it is conceivable, that under such conditions, small-scale goethitic ore bodies could be formed speleogeneticly. Similarly, W 4+ O 2 (solubility 10 mg/l not depending on pH if <10) is more soluble than W 6+ O 3 (0.1-2 mg/l depending on increasing pH) (Dermatas et al 2004), thus being co-precipitated with Fe upon oxidation and explaining the high tungsten concentration in sample IC4.…”

Section: +mentioning

confidence: 99%

The Possibly Hypogene Karstic Iron Ore Deposit of Warda Near Ajloun (Northern Jordan), its Mineralogy, Geochemistry and Historic Mine

Al-Malabeh

Kempe

Henschel³

et al. 2008

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. Tla v rudišču so danes pokrita z do dva metra debelo plastjo poplavnih sedimentov (volumen 680 m 3 ). Rudišče seka več naravnih votlin in s sigo zapolnjenih razpok, kakor tudi podorno dvorano v apnencu, katere izvor ni jasen. Iz ocene prostornine izkopa smo določili, da so v rudniku nakopali približno 1100 ton čistega železa. Mineraloške (rentgenska difrakcija) raziskave so pokazale, da je ruda pretežno goethitno-limonitna z opazno vsebnostjo hematita. Geokemične (rentgenska fluorescenca) analize pa kažejo na zelo čist goethite, z vsega enim odstotkom nečistoč. Med elementi v sledovih so najbolj pogosti W (248 ppm), As (168 ppm) in Co (124 ppm) vseh ostalih pa je manj kot 37 ppm. Prejšnje raziskave so pokazale da se ruda razteza na površini ACTA CARSOLOGICA 37/2-3 - 2008 242 show the highest concentrations, with all others < 37 (Ba) ppm. Former prospecting results show that the deposit has a spatial extent of 300 x 200 m with a maximal thickness of about 10 m. Textural, mineralogical and geochemical criteria suggest that the ore body could be of speleogene origin, i.e. deposited in a hypogene, deep phreathic setting, possibly before regional uplift or even prior to the maximal burial depth. A possibly similar ore-body is for example described from the gigantic Lower Cretaceous and sand-filled cave of Wülfrath (North RhineWestphalia, Germany) (Drozdzewski et al. 1998).

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confidence: 99%

The Possibly Hypogene Karstic Iron Ore Deposit of Warda Near Ajloun (Northern Jordan), its Mineralogy, Geochemistry and Historic Mine

Al-Malabeh

Kempe

Henschel³

et al. 2008

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“…This is very useful and often unavoidable to understand and predict the mobility of sorbing substances in the environment ). Adsorption-related processes play a significant role in controlling subsurface aqueous tungsten concentration and mobility (Dermatas et al, 2004). Dermatas et al (2004) performed experiments on the solubility of tungsten and its effects on soil respiration.…”

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Assessing tungsten transport in the vadose zone: From dissolution studies to soil columns

et al. 2012

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a b s t r a c tThis study investigates the dissolution, sorption, leachability, and plant uptake of tungsten and alloying metals from canister round munitions in the presence of model, well characterized soils. The source of tungsten was canister round munitions, composed mainly of tungsten (95%) with iron and nickel making up the remaining fraction. Three soils were chosen for the lysimeter studies while four model soils were selected for the adsorption studies. Lysimeter soils were representatives of the typical range of soils across the continental USA; muck-peat, clay-loamy and sandy-quartzose soil. Adsorption equilibrium data on the four model soils were modeled with Langmuir and linear isotherms and the model parameters were obtained. The adsorption affinity of soils for tungsten follows the order: Pahokee peat > kaolinite > montmorillonite > illite. A canister round munition dissolution study was also performed. After 24 d, the measured dissolved concentrations were: 61.97, 3.56, 15.83 mg L À1 for tungsten, iron and nickel, respectively. Lysimeter transport studies show muck peat and sandy quartzose soils having higher tungsten concentration, up to 150 mg kg À1 in the upper layers of the lysimeters and a sharp decline with depth suggesting strong retardation processes along the soil profile. The concentrations of tungsten, iron and nickel in soil lysimeter effluents were very low in terms of posing any environmental concern; although no regulatory limits have been established for tungsten in natural waters. The substantial uptake of tungsten and nickel by ryegrass after 120 d of exposure to soils containing canister round munition suggests the possibility of tungsten and nickel entering the food chain.

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“…The oxidation states and coordination numbers of W range from − 2 to +6 and 5 to 9, respectively, leading to the possibility of soluble complex formation with a variety of inorganic and organic ligands. 13 In contrast, W is a relatively poorly known transition metal, 1 and the biological and biochemical effects of its compounds are not well known. It has been stated that some W compounds may have adverse biological effects on humans and animals.…”

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confidence: 99%

Development of a sample preparation strategy for the determination of tungsten in soil samples by inductively coupled plasma mass spectrometry using a response surface methodology

Erdemir¹

2017

Turk J Chem

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An alternative rapid digestion method has been developed for the determination of tungsten (W) in soil samples using fractionation studies and response surface methodology. The digestion method using the Kjeldahl instrument was applied to samples, and soluble tungsten was determined via inductively coupled plasma mass spectrometry. Digestion parameters were selected depending on the results of fractionation studies and optimized using a four-factor and five-level central composite design. The contributions of the phosphoric acid concentration (X 1) , digestion temperature (X 2) , digestion time (X 3) , and hydrochloric acid concentration (X 4) were evaluated for the determination of W from samples in which its levels were maximum. Optimum conditions for factors were found to be X 1 = 9.00 M, X 2 = 124 • C, X 3 = 45 min, and X 4 = 1.52 M using a predicted W level of 86.82 µ g L −1 . This yielded an expected level of 1736.40 mg kg −1 under the optimized conditions. Experimental W levels were in good agreement with this predicted level and found to be 1682.69 mg kg −1 . Thus, measured W levels showed the versatility of the central composite design in such a complex soil matrix for method development.

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Solubility, Sorption, and Soil Respiration Effects of Tungsten and Tungsten Alloys

Cited by 100 publications

References 4 publications

The Possibly Hypogene Karstic Iron Ore Deposit of Warda Near Ajloun (Northern Jordan), its Mineralogy, Geochemistry and Historic Mine

The Possibly Hypogene Karstic Iron Ore Deposit of Warda Near Ajloun (Northern Jordan), its Mineralogy, Geochemistry and Historic Mine

Assessing tungsten transport in the vadose zone: From dissolution studies to soil columns

Development of a sample preparation strategy for the determination of tungsten in soil samples by inductively coupled plasma mass spectrometry using a response surface methodology

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