Decolorization of Methyl Orange by a new clay-supported nanoscale zero-valent iron: Synergetic effect, efficiency optimization and mechanism

Xiao-guang, LI; Zhao, Ying; Xi, Beidou; Meng, Xiaoguang; Gong, Bin; Li, Rui; Peng, Xing; Liu, Hongliang

doi:10.1016/j.jes.2016.03.022

Cited by 72 publications

(19 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This new band could be used as evidence for adsorption of MB, DR81, MO and CV on calcined magnesite which further certifies the successful adsorption of MB, DR81, MO and CV by calcined magnesite. Similar developments of new bands were also observed on other studies after adsorbents interacted with the dye solution ( Li et al., 2017 ; Wang et al., 2013 ). From the FTIR spectra of raw and MB, DR81, MO and CV reacted calcined magnesite it can be affirmed that these spectra are more similar, they only differ on the development of a new band at 3694 cm −1 .…”

Section: Resultssupporting

confidence: 87%

Calcined magnesite as an adsorbent for cationic and anionic dyes: characterization, adsorption parameters, isotherms and kinetics study

Ngulube

Gumbo

Masindi

et al. 2018

Heliyon

View full text Add to dashboard Cite

The ability of calcined magnesite for Methylene Blue (MB), Direct Red 81 (DR81), Methyl Orange (MO) and Crystal Violet (CV) dye removal was evaluated in this study. The experiments were designed to test the hypothesis that alkaline earth carbonates can remove dyes from water through a combination of sorption and coagulative reactions involving Mg2+. To achieve that, several operational factors like residence time, dosage, adsorbent concentration and temperature were appraised. The batch study proved that calcined magnesite is effective in the treatment of MB, DR81, CV and MO contaminated water and moreover it performed well in terms of color removal. The adsorption equilibrium data were analysed by the Langmuir, Freundlich, Dubinin–Radushkevich and Temkin isotherm models, and the Dubinin–Radushkevich and Temkin models were found to be the most appropriate fit to MB and MO dyes respectively. The adsorption kinetics process primarily followed the Elovich and Pseudo-second order model, a possible indication that chemisorption was the rate limiting step during the dye uptake process. With the adsorption–desorption cycle repeated four times, the calcined magnesite regeneration efficiency for DR81 and MO loaded dyes remained very high. According to the results of this study, it can be concluded that calcined magnesite can be used effectively for the adsorption of MB, DR81, CV and MO from wastewater.

show abstract

Section: Resultssupporting

confidence: 87%

Calcined magnesite as an adsorbent for cationic and anionic dyes: characterization, adsorption parameters, isotherms and kinetics study

Ngulube

Gumbo

Masindi

et al. 2018

Heliyon

View full text Add to dashboard Cite

show abstract

“…Comparatively, lower MO decolorization was observed by using citric acid than acetic acid at pH value of 4 which is in accordance of Kumar and Sinha . As it is reported that the strength of surface adsorption and complexation increases as the number of carboxylic groups in each ligand molecule increases , consequently, citrate anion with more number of carboxylic groups formed tighter complex at the FZVN surface, retarding MO decolorization by hindering electron transfer from nickel to MO .…”

Section: Resultsmentioning

confidence: 99%

A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

Deng

Yang

Zhu

et al. 2017

Env Prog and Sustain Energy

View full text Add to dashboard Cite

In this article, foam zero‐valent nickel (FZVN) was put forward as a promising zero‐valent metal for the pretreatment of azo dye wastewater (MO as a model contaminant). The characteristics of FZVN were evaluated by methods of Barrett‐Emmett‐Teller, scanning electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. Moreover, influence of key experimental parameters, including oxygen concentration, presence of different acid, pH, and temperature on the MO decolorization were systematically ascertained. Furthermore, possible mechanism of MO removal by FZVN was investigated by using Liquid chromatography‐mass spectrometry (LC‐MS). Results showed that FZVN was a three‐dimensional pore material with a specific surface area of 3 m2 g−1. Moreover, anoxic condition, presence of acetic acid, higher temperatures and acid conditions were beneficial to decolorize MO by FZVN while the decolorization process obeyed the first order kinetic model with an apparent rate constant (kapp) of 0.162 min−1 at pH value of 4 (25°C). The activation energy Ea obtained from the decolorization reaction was 83.1 kJ mol−1. Based on LC‐MS results, the role of FZVN in the decolorization reaction process was suggested as follows: strong reductive, catalysis, and adsorption. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 686–694, 2018

show abstract

“…Methods such as supporting on substrate, coating on stabilizer, doping with metal catalyst (Ni, Pd or Cu), or surface modification are developed to solve the above problems [3,[9][10][11][12]. Among all the strategies, supporting nZVI on inorganic clay mineral has aroused most research interest [12][13][14]. Clay is abundant in the earth and is a suitable substrate for most pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Soliemanzadeh et al found that the maximum sorption capacities of bentonitesupported nZVI were much higher (27.63 mg/g) than those of natural bentonite (4.61 mg/g) [13]. The decolorization efficiencies of MO were greatly enhanced after suppoting nZVI on the Hangjin 2 # clay [14]. However, nZVI particles that are supported on the clay are still exposed to the environment, which can be passivated by an iron oxide or hydroxide film produced from the corrosion process, resulting in a reduced activity.…”

Section: Introductionmentioning

confidence: 99%

Palygorskite-supported sulﬁde-modiﬁed nanoscale zero-valent iron for Congo red removal

Quan

Yang

Fan

et al. 2019

Environmental Pollutants and Bioavailability

View full text Add to dashboard Cite

In this work, the optimum conditions for the synthesis of nano zero valent iron sulfide were studied in detail using orthogonal experiment. The palygorskite-supported sulfide-modified nanoscale zero-valent iron (S-nZVI/P) was prepared, characterized, and further applied to remove Congo red (CR) in aqueous solutions. The results of structural characterization showed that the Fe 0 was coated with FeS layers. The influence of sulfidation conditions on the removal rat e of CR was investigated in detail, and the results revealed that S-nZVI/P prepared at 30°C with a Fe/S ratio of 1 was found to effectively remove CR. Moreover, S-nZVI/P showed a significantly enhanced removal rate towards CR as compared with nZVI/P and nZVI, suggesting that sulfidation treatment is a promising method to improve the reactivity of nZVI.

show abstract

Decolorization of Methyl Orange by a new clay-supported nanoscale zero-valent iron: Synergetic effect, efficiency optimization and mechanism

Cited by 72 publications

References 41 publications

Calcined magnesite as an adsorbent for cationic and anionic dyes: characterization, adsorption parameters, isotherms and kinetics study

Calcined magnesite as an adsorbent for cationic and anionic dyes: characterization, adsorption parameters, isotherms and kinetics study

A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

Palygorskite-supported sulﬁde-modiﬁed nanoscale zero-valent iron for Congo red removal

Contact Info

Product

Resources

About