Efficient removal of methyl orange from aqueous solution using amidoxime adsorbent

Rahman, Nazia; Dafader, N. C.; Miah, Abdur Rahim; Shahnaz, Syed Bakar Sharifah

doi:10.1080/00207233.2018.1494930

Cited by 13 publications

(3 citation statements)

References 28 publications

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“…Utilizing AOPIM as the foundational material in membrane construction enables the effective adsorption of charged compounds driven by electrostatic interactions with the amidoxime group. Notably, the amidoxime functional group, documented in previous studies, ,− exhibits pH-dependent charge variations due to its intrinsic structure; specifically, the amine moiety within the group undergoes protonation under acidic conditions, while the hydroxide segments deprotonate in alkaline settings. By integrating AOPIM’s microporous structure with its pH-responsive functional group, there exists the potential to fabricate an adsorptive membrane of enhanced efficiency with selective separation.…”

Section: Introductionmentioning

confidence: 93%

Polymer of Intrinsic Microporosity Enabled pH-Responsive Adsorptive Membrane: Selectivity and Mechanism

Loh,

Burrows,

Zhang

et al. 2024

ACS Appl. Eng. Mater.

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We designed and fabricated a pH-responsive amidoxime-modified polymer of intrinsic microporosity (AOPIM) membrane for the selective separation of charged dyes under varying pH conditions. The membrane was fabricated using a nonsolvent-induced phase separation method with ethanol as the nonsolvent. By utilizing the amidoxime group as the selective affinity site, the AOPIM membrane manifested charge reversals, enabling high adsorption capacity, notably with methylene blue (MB) uptake reaching 444.2 mg g −1 . In dye filtration, it achieved substantial separation efficiencies for both anionic (IC: 94.7 L m −2 h −1 bar −1 ; 80% rejection) and cationic dyes (MB: 94.9 L m −2 h −1 bar −1 ; 99% rejection). Furthermore, the AOPIM membrane also possesses high separation selectivity for cationic dye in a dual dye mixture at a high pH environment. Results reported here underscore the unique pH-responsive properties of the AOPIM membrane, shedding light on the application of adsorptive membranes for pollution control.

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Section: Introductionmentioning

confidence: 93%

Polymer of Intrinsic Microporosity Enabled pH-Responsive Adsorptive Membrane: Selectivity and Mechanism

Loh,

Burrows,

Zhang

et al. 2024

ACS Appl. Eng. Mater.

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“…All of these values indicate that orange G dye is one to be treated. When it came to adsorbing MO, corn cob char [129] had an adsorption capacity potential of 85 mg/g, while amidoxime char [143] had a potential of 140 mg/g.…”

Section: Biochar As a Dye Removal Adsorbentmentioning

confidence: 99%

A Review of the Removal of Dyestuffs from Effluents onto Biochar

et al. 2022

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The study provides a review of various applications of biomass-derived biochars, waste-derived biochars, and modified biochars as adsorbent materials for removing dyestuff from process effluents. Processing significant amounts of dye effluent discharges into receiving waters can supply major benefits to countries which are affected by the water crisis and anticipated future stress in many areas in the world. When compared to most conventional adsorbents, biochars can provide an economically attractive solution. In comparison to many other textile effluent treatment processes, adsorption technology provides an economic, easily managed, and highly effective treatment option. Several tabulated data values are provided that summarize the main characteristics of various biochar adsorbents according to their ability to remove dyestuffs from wastewaters.

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“…Decontamination of dyes wastewater can be achieved through a considerable number of processes, such as adsorption 6,7 , coagulation 8 , ozonation 9 , photocatalytic 10 and electrochemical oxidation methods. Amongst these processes, electrochemical treatments have received great attention for the removal of recalcitrant organic compounds from waters.…”

Section: Introductionmentioning

confidence: 99%

Optimization of textile azo dye degradation by electrochemical oxidation using Box-Behnken Design

Oukili

Loukili

2019

Mediterr.J.Chem.,

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Degradation of textile azo dye solutions containing Methyl Orange by anodic oxidation using an electrochemical reactor was studied. The combined effect of independent parameters (current intensity, initial pH and electrolysis time) on color removal efficiency was investigated and optimized using response surface methodology. A Box-Behnken design was successfully employed for experimental design. The obtained quadratic model was statistically tested using analysis of variance (ANOVA). Results showed that the optimal operating conditions to achieve 98.51% efficiency for color removal were current intensity = 4.6 A, initial pH= 4 and electrolysis time = 65 min, at a dye concentration and temperature of 50 mg/L and 25 Â°C, respectively.

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Efficient removal of methyl orange from aqueous solution using amidoxime adsorbent

Cited by 13 publications

References 28 publications

Polymer of Intrinsic Microporosity Enabled pH-Responsive Adsorptive Membrane: Selectivity and Mechanism

Polymer of Intrinsic Microporosity Enabled pH-Responsive Adsorptive Membrane: Selectivity and Mechanism

A Review of the Removal of Dyestuffs from Effluents onto Biochar

Optimization of textile azo dye degradation by electrochemical oxidation using Box-Behnken Design

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