A hierarchically porous MgFe2O4/γ-Fe2O3 magnetic microspheres for efficient removals of dye and pharmaceutical from water

Lu, Lu; Li, Jianbao; Yu, Jing; Song, Peng; Ng, Dickon H. L.

doi:10.1016/j.cej.2015.07.081

Cited by 94 publications

(22 citation statements)

References 52 publications

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“…5a shows the FTIR spectra of the intact PG and Zn(OAc)2pretreated PG. The spectrum of PG is very similar to the FTIR spectra of pollen grains reported recently [39,40]. The main signals from lipids, proteins and sporopollenin present on the PG surface are observed at 3400 cm -1 (hydroxyl groups), 1745 cm -1 (C=O stretch from carboxylic acids and esters), 1650 cm -1 (C=O stretch from amides), 1436 cm -1 (CH2 deformation) and 1060 cm -1 (C-O stretch from carboxylic acids, alcohols and esters).…”

Section: Ftir Measurements Have Been Performed In Order To Elucidate supporting

confidence: 86%

Room-temperature fabrication of core-shell nano-ZnO/pollen grain biocomposite for adsorptive removal of organic dye from water

Tzvetkov

Kaneva

Spassov

2017

Applied Surface Science

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A new core-shell nano-ZnO/pollen grain (n-ZnO/PG) biocomposite have been successfully synthesized via simple and low-temperature two-step liquid precipitation method. The synthetic strategy consists of grafting the surface of pine pollen grains (PG) with Zn 2+-organic complexes followed by a treatment in Zn(CH3COO)2/NaOH solution, thus producing a closed n-ZnO shell around the organic core, with a thickness of ~450 nm. Scanning electron microscopy, X-ray diffraction, FTIR, XPS and UV-vis spectroscopy measurements along with N2 adsorption/desorption were used to characterize the resulting n-ZnO/PG biocomposite. The asprepared core-shell microparticles are meso-/macro-porous with BET surface area of 25 m 2 g-1 and total pore volume of 0.26 cm 3 g-1. The adsorption properties of n-ZnO/PG were evaluated through adsorption of Malachite Green (MG) from aqueous medium at room temperature (25 °C). For the sake of comparison, the physico-chemical and adsorptive properties of the raw PG and pure n-ZnO were also examined. Results indicate that n-ZnO/PG is the most favorable for the adsorption of MG under the conditions used in this study. The adsorption kinetic data for PG, n-ZnO and n-ZnO/PG follow the pseudo-second order equation and the maximum adsorption capacity follows an order of n-ZnO/PG > n-ZnO > PG. For n-ZnO/PG an adsorption uptake up to 145.9 mg g-1 is observed. The as-prepared core-shell biocomposite material is a promising cost-effective and environmentally friendly adsorbent due to its textural properties, surface chemistry, adsorption capacity and recyclability.

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Section: Ftir Measurements Have Been Performed In Order To Elucidate supporting

confidence: 86%

Room-temperature fabrication of core-shell nano-ZnO/pollen grain biocomposite for adsorptive removal of organic dye from water

Tzvetkov

Kaneva

Spassov

2017

Applied Surface Science

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“…The adsorption arises based on physical forces including dipole moments, polarization forces, dispersive forces or repulsive and/or interactions force and chemical forces . Depending on the nature of involved the forces adsorption has physical and/or chemisorption nature, while the first is because on bounding target compound to surface by relatively weak van der Walls forces . Chemisorption is emerged from exchange or sharing of electrons between the adsorbate molecules and adsorbent which known as chemical reaction and as expected is thus much stronger than physisorption based bind …”

Section: Introductionmentioning

confidence: 99%

Highly efficient adsorption of Naphthol Green B and Phenol Red dye by Combination of Ultrasound wave and Copper‐Doped Zinc Sulfide Nanoparticles Loaded on Pistachio‐Nut Shell

Masoudian

Rajabi

Ghaedi

et al. 2018

Applied Organom Chemis

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The simultaneous and competitive ultrasound‐assisted removal of naphthol green B (NG‐B) and phenol red (PH‐R) dye from aqueous solutions were rapidly performed onto copper‐doped zinc sulfide nanoparticles loaded on pistachio‐nut shell activated carbon (Zn‐S: Cu‐NPs‐PAC). Novel adsorbent was recognized by FT‐IR, EDX, SEM and particle size distribution techniques. First, the effect of pH on the removal efficiency was optimized by one‐at‐a‐time procedure and subsequently dependency of dyes removal in their binary situation to variables such as sonication time, initial dyes concentrations and adsorbent dosage was fully investigated and optimized by central composite design (CCD) under response surface methodology (RSM) as well as by regarding desirability function (DF). The good agreement between experimental and predicted values supports suitability of the present model for well definition adsorption state. The ultrasound strongly enhanced mass transfer and performance, while 0.035 g of adsorbent is sufficient and capable to remove high percentage (>99.0%) of dyes in the rapid time (6 min). The experimental equilibrium data represented by Langmuir at mild conditions for successful removal of high adsorption capacity in binary system (196 mg g−1 for PH‐R, 76 mg g−1 for NG‐ B). Kinetics evaluation of experiments at various time intervals reveals applicability of pseudo‐second‐ order models for description of adsorption processes.

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“…Incorporation of M x Fe 3-x O 4 into other chemicals like activated carbon (AC) can also be used to remove pharmaceuticals. For example, the maximum adsorption capacity of MnFe 2 O 4 /AC to sulfamethoxazole is 159 mg/g at pH 7 (Wan et al, 2014), and maximum adsorption of hierarchically porous MgFe 2 O 4 /g-Fe 2 O 3 magnetic microspheres to minocycline is 201 mg/g (Lu et al, 2016). Metal-organic framework (MOF) is a class of highly crystalline porous materials consisting of a metal ion and an organic linker molecule .…”

Section: Adsorptionmentioning

confidence: 99%

Pharmaceutical removal from water with iron- or manganese-based technologies: A review

Liu

Sutton

Rijnaarts

et al. 2016

Critical Reviews in Environmental Science and Technology

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Pharmaceuticals are detected at trace levels in waters. Their adverse effects on aquatic ecosystems and human health demand novel pharmaceutical removal technologies for treating wastewater effluents. Iron (Fe) or manganese (Mn) may play important roles in these new technologies since these metals are abundantly available at low costs and are known to contribute to organic conversions via physico-chemical, chemical, and biologically related processes. Few reviews describe and discuss Fe-or Mn-based technologies for the purpose to remove pharmaceuticals from water. Therefore, we review the current literature sorted into the three removal mechanisms, that is., through physico-chemical, chemical, and biological processes. The principals, performance, and influential parameters of these three types of technologies are described. Current and potential applications of these technologies are critically evaluated in order to identify advantages and challenges. In addition, the Fe-or Mn-based technologies which are currently not used but promising to further develop to remove pharmaceuticals cost efficiently are proposed.

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A hierarchically porous MgFe2O4/γ-Fe2O3 magnetic microspheres for efficient removals of dye and pharmaceutical from water

Cited by 94 publications

References 52 publications

Room-temperature fabrication of core-shell nano-ZnO/pollen grain biocomposite for adsorptive removal of organic dye from water

Room-temperature fabrication of core-shell nano-ZnO/pollen grain biocomposite for adsorptive removal of organic dye from water

Highly efficient adsorption of Naphthol Green B and Phenol Red dye by Combination of Ultrasound wave and Copper‐Doped Zinc Sulfide Nanoparticles Loaded on Pistachio‐Nut Shell

Pharmaceutical removal from water with iron- or manganese-based technologies: A review

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