scholarly journals Treatment of electrochemical plating wastewater by heterogeneous photocatalysis: the simultaneous removal of 6:2 fluorotelomer sulfonate and hexavalent chromium

RSC Advances ◽  
2021 ◽  
Vol 11 (59) ◽  
pp. 37472-37481
Author(s):  
Hak-Hyeon Kim ◽  
Seyfollah Gilak Hakimabadi ◽  
Anh Le-Tuan Pham
Keyword(s):  
Hexavalent Chromium ◽  
Heterogeneous Photocatalysis ◽  
Simultaneous Removal ◽  
Electrochemical Plating ◽  
Plating Wastewater

6:2 fluorotelomer sulfonate (6:2 FtS) and chromate (Cr(vi)) in chromate plating wastewaters can be simultaneously removed by photocatalysis.

Simultaneous removal of nitrate, copper and hexavalent chromium from water by aluminum-iron alloy particles

2019 ◽  
Vol 227 ◽  
pp. 103541 ◽  
Author(s):  
Jingqi Zhang ◽  
Jing Wu ◽  
Jingbo Chao ◽  
Naijie Shi ◽  
Haifeng Li ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Iron Alloy ◽  
Simultaneous Removal ◽  
Alloy Particles ◽  
Aluminum Iron

scholarly journals Reduced graphene oxide supported ZnO quantum dots for visible light-induced simultaneous removal of tetracycline and hexavalent chromium

RSC Advances ◽  
2020 ◽  
Vol 10 (35) ◽  
pp. 20494-20503 ◽  
Author(s):  
K. V. Ashok Kumar ◽  
Bhairi Lakshminarayana ◽  
D. Suryakala ◽  
Ch. Subrahmanyam
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Hexavalent Chromium ◽  
Hydroxyl Radicals ◽  
Simultaneous Removal ◽  
Photocatalytic Mechanism ◽  
Reduced Graphene ◽  
Zno Quantum Dots

The photocatalytic mechanism explains that electrons and hydroxyl radicals were responsible for reduction of Cr(vi) and oxidation of tetracycline.

scholarly journals Hexavalent Chromium Removal from Wastewaters

2011 ◽  
Vol 68 (2) ◽  
Author(s):  
Cristina MODROGAN ◽  
Alexandra Raluca MIRON ◽  
Oanamari Daniela ORBULET ◽  
Cristina COSTACHE ◽  
Marian ANGHEL
Keyword(s):  
Waste Water ◽  
Hexavalent Chromium ◽  
Contact Time ◽  
Stable Complex ◽  
Chromium Removal ◽  
Environment Management ◽  
Chromium Plating ◽  
Initial Ph ◽  
Complex Forms ◽  
Plating Wastewater

Althought have been done important progresses in developing countries in environment management field, heavy metals remain an important threat for human health and environment components. Unlike other pollutants classes, which can be biodegradable or completely destroyed, metals are not biodegradable and none of metals can not be destroyed. However, metals can be transformed into more toxic forms or more stable complex forms which can be more or less toxic. In this paper, was studied the removal of hexavalent chromium from waste water using solid waste (charcoal made from nutshells, furnace ash). The authors studied the influence of the following parameters: the initial pH of solution, the contact time on the sorption capacity. The adsorbent efficiency to the chromium removal was also studied using chromium-plating wastewater.

Titania-based heterogeneous photocatalysis. Materials, mechanistic issues, and implications for environmental remediation

2001 ◽  
Vol 73 (12) ◽  
pp. 1849-1860 ◽  
Author(s):  
Krishnan Rajeshwar ◽  
C. R. Chenthamarakshan ◽  
Scott Goeringer ◽  
Miljana Djukic
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Hexavalent Chromium ◽  
Environmental Remediation ◽  
Catalytic Properties ◽  
Heterogeneous Photocatalysis ◽  
The Other ◽  
Tio2 Surface ◽  
Tio2 Sample

Using hexavalent chromium [Cr(VI)] and methylene blue (MB) as model substrates, we discuss three aspects of TiO2-based heterogeneous photocatalysis. We show first that a given TiO2 sample may not be simultaneously optimal for photocatalytically driving the reduction of Cr(VI) and the oxidation of MB. We further show that a TiO2 sample that strongly adsorbs either of these substrates in the dark is not optimal as a photocatalyst. The other two aspects concern circumventing the rather poor surface catalytic properties and visible light photoresponse of TiO2, respectively. Strategies revolving around the visible light photoexcitation of the substrate itself and metal-modification of the TiO2 surface, are described as possible solutions.

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