Trivalent Chromium Ion Adsorption on Various Types of Wastewater Sludge

Herein, we report on the growth of Cr4+–Li2CaGeO4 crystals by the flux growth method from the flux of LiCl, as well as on the effect of doping Li2CaGeO4 with Cr4+ ions on the NIR region spectral properties and crystal structure. The results quantified the occupancy of Cr4+ in Ge4+ sites. The emission spectrum presented broad bands in the NIR region, i.e., 1000–1500 nm excited by 980 nm, with maximum peaks at 1200 nm at room temperature caused by the transition of 3T2→3A2 in Cr4+ ions. The lifetime decreased with the Cr4+ ion doping concentration, specifically from 14.038 to 12.224 ms. The chemical composition and the valence state of chromium in Li2CaGeO4 were analyzed using X-ray photoelectron spectroscopy, which showed that the chromium in Li2CaGeO4 was tetravalent and no trivalent chromium was found. Therefore, the Cr4+–Li2CaGeO4 crystal has a great potential and future in optical applications.

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Trivalent Chromium Ion Removal from Aqueous Solutions Using Low-Cost Zeolitic Materials Obtained from Exhausted FCC Catalysts

Adsorption Science & Technology ◽

10.1260/0263-6174.29.7.629 ◽

2011 ◽

Vol 29 (7) ◽

pp. 629-636 ◽

Cited By ~ 6

Author(s):

Maximiliano R. González ◽

Andrea M. Pereyra ◽

Elena I. Basaldella

Keyword(s):

Aqueous Solutions ◽

Low Cost ◽

Trivalent Chromium ◽

Chromium Ion ◽

Ion Removal ◽

Fcc Catalysts ◽

Zeolitic Materials

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Ratiometric near-infrared chemosensor for trivalent chromium ion based on tricarboyanine in living cells

Analytica Chimica Acta ◽

10.1016/j.aca.2014.03.022 ◽

2014 ◽

Vol 824 ◽

pp. 71-77 ◽

Cited By ~ 5

Author(s):

Chun-Yan Li ◽

Xue-Fei Kong ◽

Yong-Fei Li ◽

Chao Weng ◽

Jia-Liang Tang ◽

...

Keyword(s):

Near Infrared ◽

Living Cells ◽

Trivalent Chromium ◽

Chromium Ion

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Effects of the Fluorination of Activated Carbons on the Chromium Ion Adsorption

Applied Chemistry for Engineering ◽

10.14478/ace.2014.1126 ◽

2015 ◽

Vol 26 (1) ◽

pp. 92-98 ◽

Cited By ~ 5

Author(s):

Min-Ji Kim ◽

Min-Jung Jung ◽

Suk Soon Choi ◽

Young-Seak Lee

Keyword(s):

Activated Carbons ◽

Ion Adsorption ◽

Chromium Ion

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Removal of Trivalent Chromium ION in Wastewater by Zeolite 4a

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.6091 ◽

2011 ◽

Vol 383-390 ◽

pp. 6091-6096

Author(s):

Lan Shu Jin ◽

Xue Feng Chu ◽

Guo Lin Lin ◽

Bo Ying

Keyword(s):

Elimination Rate ◽

Inorganic Ions ◽

Freundlich Isotherm ◽

Static Condition ◽

Trivalent Chromium ◽

Adsorptive Capacity ◽

Adsorption Characteristic ◽

Chromium Ion ◽

Zeolite 4A ◽

Exchange Material

Under the static condition, researching zeolite 4A to the chromium ion's adsorption characteristic, discussing the influence of different adsorption factors. The results indicated that: When the wastewater temperature was 30°C, at pH 3-4,adsorbed 30min,dosing 3g/L of zeolite 4A adsorption chromic wastewater(100mg/L), the chromium ion elimination rate may reached above 99%. At the same time, the zeolite 4A conforms to Langmuir and the Freundlich isotherm to the chromium ion's adsorption, the correlation coefficient respectively was 0.9997 and 0.9753, obtained the zeolite 4A to the chromium ion saturated adsorptive capacity was 50.25mg/L.Obviously, zeolite 4A as a new inorganic ions exchange material for the treatment of chromic wastewater, has the broad prospects for development.

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Trigonal distortion of water octahedron surrounding trivalent chromium ion

Ferroelectrics Letters Section ◽

10.1080/07315179308203358 ◽

1993 ◽

Vol 16 (5-6) ◽

pp. 131-141

Author(s):

B. MADHU Sudhana ◽

S. N. Rao ◽

Y. P. Reddy ◽

B. J. Reddy ◽

P. S. Rao

Keyword(s):

Trivalent Chromium ◽

Chromium Ion ◽

Trigonal Distortion

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