Degradation of azo and anthraquinone dyes by a low-cost Fe0/air process

Removal of Reactive Black 5 by zero-valent iron modified with various surfactants

“…The decolorization of RB5 in aqueous solution by ZVI particles mostly occurs via the reductive degradation of dye molecules, and the reductive cleavage of the azo bonds of RB5 is accompanied by the oxidation of Fe 0 , resulting in the decolorization of RB5 [34].…”

Effects of dissolved oxygen on dye removal by zero-valent iron

“…The optimal initial solution pH of 3 was selected according to our previous studies [17,18]. The other operating conditions were dye concentration of 100 mg L −1 and air flow rate of 3.5 L min −1 .…”

“…Besides, several recent studies have reported that zero-valent iron under oxic condition can generate Fenton-like reaction and degrade organic pollutants like EDTA [10,11], herbicides [12,13], aromatic compounds [14], and dyes [15,16]. The Fe 0 /air process is a developing technique that can effectively remove azo dyes (AB1 and RB5) and anthraquinone dyes (RB4 and RBBR) [17,18]. Also, dissolved oxygen concentration and gas flow rate should have significant influences on dye removal by Fe 0 ; however related studies are limited.…”

Effect of spatial distribution and aging of ZVI on the reactivity of resin–ZVI composites for arsenite removal

“…Application of zero-valent iron (ZVI or Fe 0 ) is an environmental benign approach of remediation/treatment of contaminated groundwater and wastewater, because it is cost-effective and readily available and can remove a variety of organic and inorganic contaminants including chlorinated organic compounds [1,2], nitroaromatic compounds [3,4], dyes [5,6], heavy metals [7,8], arsenic [9,10], nitrate [11,12], and phenol [13]. ZVI system can take advantage of not only the reductive but also oxidative reactions, which may make the ZVI technology more versatile.…”