Chromium Compounds

Anger, Gerd; Halstenberg, Jost; Hochgeschwender, Klaus; Scherhag, Christoph; Korallus, U; Knopf, Herbert; Schmidt, Péter; Ohlinger, Manfred

doi:10.1002/14356007.a07_067

Cited by 31 publications

(31 citation statements)

References 45 publications

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“…It is known as a laboratory chemical material, whereas sodium chromate is an important in industrial material [1][2].…”

Section: Introduction 11 Potassium Chromate K 2 Cromentioning

confidence: 99%

Study the Structure, Morphology and Vibration Modes for K2CrO4 and K2Cr2O7

Azeez¹,

Mohammad²

2017

JNUS

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In this work, the X-ray diffraction (XRD) measurement have been done to study the structure of K 2 CrO 4 , and K 2 Cr 2 O 7 powders.The morphology of K 2 CrO 4 , and K 2 Cr 2 O 7 thin films has been studied by using Atomic Force Microscopy (AFM) technique. Modes of vibrations for both K 2 CrO 4 , and K 2 Cr 2 O 7 compounds were measured and discussed using Fourier transform infrared spectroscopy (FTIR).

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“…It is known as a laboratory chemical material, whereas sodium chromate is an important in industrial material [1][2].…”

Section: Introduction 11 Potassium Chromate K 2 Cromentioning

confidence: 99%

Study the Structure, Morphology and Vibration Modes for K2CrO4 and K2Cr2O7

Azeez¹,

Mohammad²

2017

JNUS

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“…For other types of sample it may vary which will depend upon the ingredients used in the production process. Na has a positive correlation with Cr because Sodium Chromate Na 2 CrO 4 is a dyeing auxiliary in the textile industry [27] . For this reason we can say that Na and Cr both have a positive correlation.…”

Section: Correlation Among the Elementsmentioning

confidence: 99%

Analysis of Heavy Metals and Other Elements in Textile Waste Using Neutron Activation Analysis and Atomic Absorption Spectrophotometry

Chowdhury¹,

Hoque²,

Hossain³

et al. 2017

IOSR JESTFT

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The work focused on the elemental and physicochemical analysis in the textile waste (Effluent and Sludge) where two effluent samples and one sludge sample were collected from Grameen Knit Dyeing Industry (GKDI). Every effluent sample is divided into liquid sample (L1 and L2) and residual sample (R1 and R2). Neutron Activation Analysis (NAA) method used for the elemental analysis. The study revealed that, in the sludge (S) the Sb concentration was found 50.2 mg/L which exceeded the standard. Here Co concentration exceeded the standard. Here the highest Cr and Cd value was found in the (S) which exceeded the standard level. The total alkalinity, hardness and free CO 2 level of discharged water was harmful for the environment.From this study it is revealed that the sludge contain high content of heavy metal and other harmful elements. Soda ash method can be applied to reduce the 'Cr' concentration.

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“…Besides, other chromium oxidation states cannot be found, since Cr(II) is readily oxidized to Cr(III), while Cr(IV) and Cr(V) form only unstable intermediates in chemical reactions between trivalent and hexavalent chromium [18]. Specifically at around neutral pH and under reducing conditions chromium has a composition corresponding to chromium(III) hydroxide hydrates, which obtained by precipitation with alkali of chromium(III) sulphate and are usually formulated as Cr(H 2 O) 3 (OH) 3 with a bright bluish green color [19]. Heating at 110 • C up to 3 h resulted to a total mass reduction of 10-12 wt%, while for longer heating no additional mass reduction was observed, concluding that the total humidity of the Cr-ISW was about 10 wt%.…”

Section: Chromium-loaded Initial Solid Wastementioning

confidence: 99%