Removal behaviors and mechanisms for series of azo dye wastewater by novel nano constructed macro-architectures material

Chen, Junfeng; Hu, Han‐Wen; Yang, Junhan; Xue, Hanhan; Tian, Ye; Fan, Keyan; Zeng, Zhixin; Yang, Jiaqi; Wang, Renjun; Liu, Yanyan

doi:10.1016/j.biortech.2020.124556

Cited by 33 publications

(7 citation statements)

References 44 publications

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“…The order of best fit of equilibrium data to isotherm models: Freundlich > Langmuir > Temkin. The results confirmed the unequal affinity of RB19 by the CTS-GL/MgO/Fe3O4 and presented the heterogeneous nature and multilayer adsorption process [55]. The maximum monolayer adsorption capacity recorded according to the Langmuir isotherm model was 193.2 mg/g, which is observed as the higher adsorption capacity compared to the other adsorbents reported in the literature (Table 7).…”

Section: Adsorption Isothermsupporting

confidence: 80%

Process Optimization and Adsorptive Mechanism for Reactive Blue 19 Dye by Magnetic Crosslinked Chitosan/MgO/Fe3O4 Biocomposite

et al. 2022

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A new biocomposite magnetic crosslinked glutaraldehyde-chitosan/MgO/Fe3O4 (CTS-GL/MgO/Fe3O4) adsorbent was prepared and applied for the removal of reactive blue 19 (RB 19) synthetic textile dye. The prepared CTS-GL/MgO/Fe3O4 was subjected to the several instrumental characterizations such as XRD, FTIR, SEM-EDX, pH-potentiometric titration, and pHpzc analyses. The influence of the input adsorption parameters such as A: CTS-GL/MgO/Fe3O4 dosage, B: initial solution pH, C: process temperature, and D: contact time on RB 19 removal efficiency was statistically optimized using Box-Behnken design (BBD). The analysis of variance (ANOVA) indicates the presence of five significant statistical interactions between input adsorption parameters i.e. (AB, AC, AD, BC, and BD). The adsorption kinetic and equilibrium study reveals a good to the pseudo-second-order model, and multilayer adsorption as proven by Freundlich isotherm model, respectively. The maximum adsorption capacity of CTS-GL/MgO/Fe3O4 towards RB19 was found to be 193.2 mg/g at 45 ºC. This work highlights the development of feasible and recoverable magnetic biocompsite adsorbent with desirable adsorption capacity towards textile dyes with good separation ability by using an external magnetic field.

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Section: Adsorption Isothermsupporting

confidence: 80%

Process Optimization and Adsorptive Mechanism for Reactive Blue 19 Dye by Magnetic Crosslinked Chitosan/MgO/Fe3O4 Biocomposite

et al. 2022

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“…4e), suggesting that there were still other interacting mechanism. The abundant O-containing functional groups including -COOH, -OH, M-OH (M: Fe 3+ and Y 3+ ) and Fe-O (Fe3O4) on Fe-SA-Y@Fe3O4 surface easily formed various multi-site H-bonding interactions with -NH2, -OH, -N=N-, -SO3 -groups and -aromatic rings (Ar) on dye molecules, such as dipole- [12,31,40] [16], which effectively improved the removal efficiency of dyes.…”

Section: Effect Of Ph and Adsorption Mechanismmentioning

confidence: 99%

“…This has prompted the ceaseless research and development of various new physical or chemical water treatment technologies for effective removal of azo dyes from wastewater effluents, but among which, adsorption technology has been universally acknowledged as the most commonly used, the most economical, highly efficient, the fastest and easiest method to operate. Moreover, various types of adsorbents can be prepared due to the rich variety of raw materials, such as carbon-based/graphene-based composite adsorbents [7][8][9][10][11], metal-organic frameworks (MOFs)/nano adsorbents [5,12], adsorbents prepared from industrial and agricultural wastes and natural minerals/polymers [13][14][15][16][17][18] and so on. However, some powdered adsorbents are not easy to be thoroughly separated after wastewater treatment, resulting in partial loss and possible secondary pollution, and some adsorbents are difficult to be popularized in application due to high price and insufficient decontamination performance.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Dual-ion-Crosslinked Magnetic Sodium Alginate-Based Fe-SA-Y@Fe3O4 Biogel Composite with Ultrastrong Performance for Azo Dye Removal

Shen

2022

J Polym Environ

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Magnetic sodium alginate(SA)-based biogel composite Fe-SA-Y@Fe3O4 macroparticles were polymerized by co-crosslinking of yttrium(III) and iron(III) ions according to the optimized preparation conditions and characterized by various modern analytical techniques. The results show that the biogel beads have unique cauliflower-shaped surface and sensitive magnetic response. Fe-SA-Y@Fe3O4 composite was used for the removal of Direct Red 13 (DR 13) and Direct Black 19 (DB 19) dyes from water. The adsorption capacities and removal efficiency can reach 2487 mg/g and 99.5% for DR-13 and 2992 mg/g and 99.7% for DB-19 respectively within the equilibrium time of 60 min at 298K and pH 2.0, and decrease slightly with pH up to 10.0. The kinetic and equilibrium adsorption data followed the Pseudo-second-order rate model and Langmuir isothermal model well, respectively. Electrostatic adsorption, various H-bonding and complexation were largely involved in dye adsorption processes with spontaneous and exothermic character by the biogel beads, which were explained by thermodynamic studies, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR), respectively. Fe-SA-Y@Fe3O4 gel composite with ultrahigh adsorption capacity and fast magnetic separation will be a promising eco-friendly biobased adsorbent for the superefficient purification of practical azo-dye effluents.Keywords: Sodium alginate  Yttrium(III)-Iron(III) ions  Azo dyes adsorption  Magnetism  Biogel composite

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“…), this technique is defined as a mass transfer process by which a substance is transferred from the liquid phase to the surface of solid sorbents. As a consequence, once saturated, the materials must be regenerated [23][24][25]. This causes an increase in the process costs and the transfer of the pollutant to other treatments for the subsequent degradation or recovery.…”

Section: Introductionmentioning

confidence: 99%

Solar Light Photoactive Floating Polyaniline/TiO2 Composites for Water Remediation

et al. 2021

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In the present study, the development of innovative polyurethane-polyaniline/TiO2 modified floating materials applied in the sorption and photodegradation of rhodamine B from water matrix under solar light irradiation is reported. All the materials were fabricated with inexpensive and easy approaches and were properly characterized. The effect of the kind of polyaniline (PANI) dopant on the materials’ behavior was investigated, as well as the role of the conducting polymer in the pollutant abatement on the basis of its physico-chemical characteristics. Rhodamine B is removed by adsorption and/or photodegradation processes depending on the type of doping agent used for PANI protonation. The best materials were subjected to recycle tests in order to demonstrate their stability under the reaction conditions. The main transformation products formed during the photodegradation process were identified by ultraperformance liquid chromatography-mass spectrometry (UPLC/MS). The results demonstrated that photoactive floating PANI/TiO2 composites are useful alternatives to common powder photocatalysts for the degradation of cationic dyes.

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Removal behaviors and mechanisms for series of azo dye wastewater by novel nano constructed macro-architectures material

Cited by 33 publications

References 44 publications

Process Optimization and Adsorptive Mechanism for Reactive Blue 19 Dye by Magnetic Crosslinked Chitosan/MgO/Fe3O4 Biocomposite

Process Optimization and Adsorptive Mechanism for Reactive Blue 19 Dye by Magnetic Crosslinked Chitosan/MgO/Fe3O4 Biocomposite

Synthesis and Characterization of Dual-ion-Crosslinked Magnetic Sodium Alginate-Based Fe-SA-Y@Fe3O4 Biogel Composite with Ultrastrong Performance for Azo Dye Removal

Solar Light Photoactive Floating Polyaniline/TiO2 Composites for Water Remediation

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