Aqueous Cr(VI) reduction by electrodeposited zero-valent iron at neutral pH: Acceleration by organic matters

Liu, Junxi; Wang, Chuan; Shi, Jianying; Liu, Hong; Tong, Yexiang

doi:10.1016/j.jhazmat.2008.06.101

Cited by 35 publications

(7 citation statements)

References 35 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to preclude the formation of surface oxides during the synthesis of ZVI, Liu J. et al (2008Liu J. et al ( , 2009) synthesized a ZVI film by electrodepositing ferrous ion cathodically on titanium substrate under anaerobic atmosphere and reducing state; the ZVI/Ti system embraced not only a high activity initially due to the oxide-free surface but also an easy handling that readily allowed the cathodic reduction to recover the inactivated ZVI (Liu J. et al 2008). Enhanced removal of Cr(VI) from contaminated water was also achieved using a combination of ZVI and sorbents such as zeolite/ZVI pellets, prepared by mixing ZVI and zeolite at a mass ratio 73:20 on a rotating dish with a binder (7% of the total weight, made of 1:1 by weight of sodium silicate and sodium aluminate in liquid form), washed with CaCl 2 solution and dried in an oven at 177°C (Li et al 1999.…”

Section: Laboratory-synthesized Zvi or Zvi-based Materialsmentioning

confidence: 99%

Hexavalent Chromium Reduction with Zero-Valent Iron (ZVI) in Aquatic Systems

Gheju

2011

Water Air Soil Pollut

326

186

View full text Add to dashboard Cite

Hexavalent chromium is a heavy metal used in a variety of industrial applications which is highly toxic to humans, animals, plants and microorganisms. Moreover, it is a well-established human carcinogen by the inhalation route of exposure and a possible human carcinogen by the oral route of exposure. Therefore, it should be removed from contaminated waters. Its reduction to trivalent chromium can be beneficial because a more mobile and more toxic chromium species is converted to a less mobile and less toxic form. During the last two decades, there has been important interest in using zero-valent iron (ZVI) as a Cr(VI)-reducing agent. A considerable volume of research has been carried out in order to investigate the mechanism and kinetics of Cr(VI) reduction with ZVI, as well as the influence of various parameters controlling the reduction efficiency. Therefore, the purpose of this review was to provide updated information regarding the developments and innovative approaches in the use of ZVI for the treatment of Cr(VI)-polluted waters.

show abstract

Section: Laboratory-synthesized Zvi or Zvi-based Materialsmentioning

confidence: 99%

Hexavalent Chromium Reduction with Zero-Valent Iron (ZVI) in Aquatic Systems

Gheju

2011

Water Air Soil Pollut

326

186

View full text Add to dashboard Cite

show abstract

“…(2015) [1][2][3][4][5][6][7][8][9][10][11][12][13][14] www.deswater.com doi: 10.1080/19443994.2015.1065763 groups. It has been extensively applied in biomedical and pharmaceutical fields due to its low cost, nontoxicity, biocompatibility, good mechanical strength, and chemical stability.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Therefore, removal of Cr(VI) from natural waters and wastewater streams has great environmental relevance. A wide range of physical and chemical processes is available for the removal of chromium from wastewater such as filtration [5], electrochemical precipitation [6], adsorption [7,8], electrodeposition [9], and membrane systems or ion exchange process [10][11][12]. Among these methods, adsorption is one of the most economically favorable and a technically easy method [13].…”

Section: Introductionmentioning

confidence: 99%

Removal of toxic Cr(VI) from water by a novel magnetic chitosan/glyoxal/PVA hydrogel film

Mirabedini¹,

Kassaee

2015

Desalination and Water Treatment

View full text Add to dashboard Cite

A B S T R A C TCoprecipitation of FeCl 2 and FeCl 3 produced magnetic iron nanoparticles (Fe 3 O 4 NPs). The latter was dispersed in an acetic acid solution of chitosan (CS), and then cross-linked with glyoxal, followed by addition of polyvinyl alcohol (PVA). The resulting gel was neutralized with NaOH giving our novel Fe 3 O 4 NPs/CS/glyoxal/PVA hydrogel film. This film was used as an efficient and reusable adsorbent for the removal of toxic Cr(VI) from water, at a rather wide range of pH. The absorbent film was characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared, and energy dispersive X-ray. Langmuir isotherm model suggested maximum Cr(VI) adsorption occurring at room temperature. Kinetic studies suggested a pseudo-second-order model for the adsorption. Our Fe 3 O 4 NPs/CS/glyoxal/PVA hydrogel is hoped to serve as a promising Cr(VI) adsorbent in wastewater treatment technology.

show abstract

“…[8][9][10] At present, chemical precipitation, adsorption, ion-exchange, membrane separation, reverse osmosis, oxidation/reduction and electrootation are conventional methods applied in their removal Cr(VI) from wastewater. [11][12][13][14][15] However, high capital costs for the above processes limit their applicability to removing Cr(VI). Therefore, it is especially important to develop a low-cost adsorbent from natural abundant materials (i.e.…”

Section: Introductionmentioning

confidence: 99%