Untitled

Иванов, В. М.; Kochelaeva, G. A.; Prokhorova, G. V.

doi:10.1023/a:1020015521584

Cited by 18 publications

(9 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, over intake of molybdenum will result in molybdenum poisoning [1][2]. Molybdenum is also widely used in industrial processes as substance for metal alloys, pigments, lubricant, and chemical catalysis [3], which can increase the level of molybdenum released to environment.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of chitosan with 3-nitro-4-amino benzoic acid moiety and its application to the collection/concentration of molybdenum in environmental water samples

Sabarudin

Oshima

Noguchi

et al. 2007

Talanta

View full text Add to dashboard Cite

A chitosan resin functionalized with 3-nitro-4-amino benzoic acid moiety (CCTS-NABA resin) was newly synthesized for the collection/concentration of trace molybdenum by using cross-linked chitosan (CCTS) as base material. The carboxyl group of the moiety was chemically attached to amino group of cross-linked chitosan through amide bond formation.The adsorption behavior of molybdenum as well as other 60 elements on the resin was examined by passing the sample solutions through a mini-column packed with the resin. After the elution of the elements collected on the resin with 1 M HNO 3 , the eluates were analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) and -atomic emission spectrometry (ICP-AES).The CCTS-NABA resin can adsorb several metal ions, such as vanadium, gallium, arsenic, selenium, silver, bismuth, thorium, tungsten, tin, tellurium, copper, and molybdenum at appropriate pHs. Among these metal ions, only molybdenum could be adsorbed almost completely on the resin at acidic regions. An excellent selectivity toward molybdenum could be obtained at pH 3-4. The adsorption capacity of CCTS-NABA resin for Mo (VI) was 380 mg g -1 resin. Through the column pretreatment, alkali and alkaline earth metals in river water and seawater samples were successfully removed.The CCTS-NABA resin was applied to the adsorption/collection of Molybdenum in river water and seawater samples. The Concentrations of molybdenum in river water samples were found in the range of 0.84 and 0.95 ppb (ng g -1 ), whereas molybdenum in seawater was about 9 ppb. The validation of the proposed method was carried out by determining molybdenum in the certified reference materials of SLRS-4, CASS-4, and NASS-5 after passing through the CCTS-NABA resin; the results showed good agreement with the certified values.

show abstract

Section: Introductionmentioning

confidence: 99%

Functionalization of chitosan with 3-nitro-4-amino benzoic acid moiety and its application to the collection/concentration of molybdenum in environmental water samples

Sabarudin

Oshima

Noguchi

et al. 2007

Talanta

View full text Add to dashboard Cite

show abstract

“…1,5,6 Molybdenum(VI) forms complexes with various natural organic ligands, such as polyphenols and their functional derivatives, polyhydroxycarboxylic acids, aminopolycarboxylic acids, hydroxamic acids, amines (primary, secondary and tertiaty), 8-hydroxyquinoline and its derivatives, aldehyde hydrazones, oximes, β-diketones, fluorones, hydroxyazodyes, biomolecules (chitosan, chitin, D-glucosamine, L-alanine, L-phenylalanine). [7][8][9][10][11][12][13][14][15][16] Molybdenum(VI) gives colored chelates with aromatic compounds, containing two or more hydroxyl groups in o-position relative to each other. The colored anionic chelates of molybdenum(VI) form ion-associated complexes with bulky organic cations, like methyltrioctylammonium, cetylpyridinium, cetyltrimethylammonium, tetraphenylammonium.…”

Section: Introductionmentioning

confidence: 99%

Study on the Complex Equilibria of Molybdenum(VI) with 3,5-Dinitrocatechol and Ditetrazolium Salt

Stojnova

Racheva

Divarova

et al. 2016

ACSi

View full text Add to dashboard Cite

The complex formed between an anionic chelate of Mo(VI)-3,5-dinitrocatechol (3,5-DNC) with the cation of 3,3'-(3,3'-dimethoxy-4,4'-biphenylene)bis(2,5-diphenyl-2H-tetrazolium chloride) (Blue Tetrazolium Chloride, BTC) in the liquid-liquid extraction system Mo(VI)-3,5-DNC-BTC-H 2 O-CHCl 3 was studied. The optimum conditions for the complex formation and extraction of the ion-associated complex were established by spectrophotometry. The molar ratio of the reagents was determined by independent methods. The validity of Beer's law was checked and some analytical characteristics were calculated. The association process in aqueous phase and the extraction equilibria were investigated and quantitatively characterized. The following key constants of the processes were calculated: association constant, distribution constant, extraction constant and recovery factor. Based on this, a reaction scheme, a general formula and a structure of the complex were suggested.

show abstract

“…Alguns aços e ligas especiais apresentam Mo em sua composição com a finalidade de aumentar a resistência à deformação por calor e à corrosão em solução, uma vez que o material se toma mais refratário e apresenta maiores coeficientes de elasticidade e resistência a cisalhamento [6] .…”

Section: Parte 1 Introduçãounclassified

“…Graças a esses importantes aspectos da química do Mo, a determinação do Mo(VI), que é a espécie mais comum de molibdênio presente em alimentos e amostras biológicas e metalúrgicas, tem mostrado interesse crescente para a sociedade química [6].…”

Section: Parte 1 Introduçãounclassified

See 1 more Smart Citation

Eletrodos modificados pela codeposição eletroquímica de metais e óxidos de molibdênio: estrutura, composição e propriedades

Kosminsky¹

View full text Add to dashboard Cite

Untitled

Cited by 18 publications

References 59 publications

Functionalization of chitosan with 3-nitro-4-amino benzoic acid moiety and its application to the collection/concentration of molybdenum in environmental water samples

Functionalization of chitosan with 3-nitro-4-amino benzoic acid moiety and its application to the collection/concentration of molybdenum in environmental water samples

Study on the Complex Equilibria of Molybdenum(VI) with 3,5-Dinitrocatechol and Ditetrazolium Salt

Eletrodos modificados pela codeposição eletroquímica de metais e óxidos de molibdênio: estrutura, composição e propriedades

Contact Info

Product

Resources

About