Removal of Acid Orange 51 by micro zero-valent iron under different operational conditions and evaluation of toxicity

Ghariani, Bouthaina; Messaoud, Mouna; Louati, Ibtihel; Mtibaà, Rim; Mechichi, Tahar

doi:10.1007/s11356-019-04929-1

Cited by 6 publications

(1 citation statement)

References 43 publications

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“…As a result, it was confirmed that the water absorption behavior of the CMC/PEI hydrogel can also repeatedly maintain pH reactivity. To confirm the correlation between the pH-sensitive properties of the CMC/PEI hydrogel and the actual dye removal properties, MB and AO were selected as representative cationic and anionic model dyes, respectively, and the adsorption efficiency for each pH was evaluated (Ghariani et al 2019;Naresh Yadav et al 2021). Figure 5 shows the results of the adsorption efficiency for each dye of the CMC/PEI hydrogel at pH 3, 7, and 10.…”

Section: Resultsmentioning

confidence: 99%

pH-responsive hydrogels of carboxymethyl cellulose and polyethyleneimine for efficient removal of ionic dye molecules

Jung

Kim

Jung

et al. 2022

BioRes

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A carboxymethyl cellulose (CMC)/polyethyleneimine (PEI) hybrid hydrogel was successfully prepared under green processing conditions. The CMC and PEI formed a polyelectrolyte complex, and the three-dimensional (3D) network structure was hardened by chemical crosslinking, resulting in suitable hydrogel properties. In the prepared CMC/PEI polyelectrolyte hydrogel, the surface charge was easily switched according to the pH change, and the resulting swelling and contraction was reversible. The pH sensitivity of the CMC/PEI hydrogel was effective in removing ionic dye contaminants, and as a result, it showed an excellent removal capacity of 319 mg/g for anionic acid orange (AO) and 129 mg/g for cationic methylene blue (MB). In addition, the CMC/PEI polyelectrolyte hydrogel maintained structural stability despite repeated changes in surface charge characteristics and shrinkage-swelling due to repeated pH conversion. As a result, in the reuse process through repeated adsorption and desorption, it showed an excellent reuse efficiency of more than 93% even after 10 reuse cycles.

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Section: Resultsmentioning

confidence: 99%

pH-responsive hydrogels of carboxymethyl cellulose and polyethyleneimine for efficient removal of ionic dye molecules

Jung

Kim

Jung

et al. 2022

BioRes

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Synthesis of zero-valent iron/biochar by carbothermal reduction from wood waste and iron mud for removing rhodamine B

Chen

Liu

Gen

et al. 2021

Environ Sci Pollut Res

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This study proposes a new process to synthesize zero-valent iron/biochar (Fe 0 -BC) by carbothermal reduction using wood waste and iron mud as raw materials under different temperature. The characterization results showed that the Fe 0 -BC synthesized at 1200ºC (Fe 0 -BC-1200) possessed favorable adsorption capacity with the specific surface area of 103.18 m 2 /g, and that the zero-valent iron (Fe 0 ) particles were uniformly dispersed 13 on the biochar surface. The removal efficiency of rhodamine B (RB) was determined 14 to evaluate the performance of the prepared Fe 0 -BC. Fe 0 -BC-1200 presented the best 15 performance on RB removal, which mainly ascribe to that more Fe 0 particles generated at higher temperature. The equilibrium adsorption capacity reached 49.93 mg/g when the initial RB concentration and the Fe 0 -BC-1200 dosage were 100 mg/L and 2g/L, respectively, and the pseudo-second-order model was suitable to fit the removal experimental data. LCMC and XRD analyses revealed that the removal mechanism included the physical adsorption of biochar and the redox reaction of Fe 0 . Moreover, copper existed in the iron mud was also reduced to Cu 0 , which was beneficial to catalyze the oxidation of iron, the degradation of RB was promoted at the same time.

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Optimising zero-valent iron from industrial waste using a modified air-Fenton system to treat cutting oil wastewater using response surface methodology

Srimoke

Kanokkantapong

Supakata

et al. 2022

Arabian Journal of Chemistry

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Removal of Acid Orange 51 by micro zero-valent iron under different operational conditions and evaluation of toxicity

Cited by 6 publications

References 43 publications

pH-responsive hydrogels of carboxymethyl cellulose and polyethyleneimine for efficient removal of ionic dye molecules

pH-responsive hydrogels of carboxymethyl cellulose and polyethyleneimine for efficient removal of ionic dye molecules

Synthesis of zero-valent iron/biochar by carbothermal reduction from wood waste and iron mud for removing rhodamine B

Optimising zero-valent iron from industrial waste using a modified air-Fenton system to treat cutting oil wastewater using response surface methodology

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