Critical review of magnetic biosorbents: Their preparation, application, and regeneration for wastewater treatment

Hassan, Masud; Naidu, Ravi; Du, Jianhua; Liu, Yanju; Qi, Fang

doi:10.1016/j.scitotenv.2019.134893

Cited by 133 publications

(69 citation statements)

References 284 publications

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“…As can be seen, the prepared materials were composed of irregular grains with obvious differences in size and morphology. The grain size was within the range of 5–25 μm for CCBC and 8–40 μm for CuFe 2 O 4 @CCBC(5%), which was consistent with the general characteristics of the biochar-based materials [ 13 , 14 ]. The particle size enlargement of the composite was observed after coating CuFe 2 O 4 owing to the thermal decomposition of Fe/Cu oxalate precursors, thus, improving the surface and pore structure.…”

Section: Results and Analysissupporting

confidence: 82%

“…Thus, emphasis has further been focused on the pristine biochar modification [ 13 ]. Importantly, the preparation of the magnetic biochars has proved to be one of the most effective biochar modifications [ 14 ]. Use of the biochar-based magnetic materials to remove the heavy metal pollutants from the aqueous solutions not only exhibits high removal performance but also enables the spent adsorbents to be easily disposed using a low strength magnetic separation device [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…Importantly, the preparation of the magnetic biochars has proved to be one of the most effective biochar modifications [ 14 ]. Use of the biochar-based magnetic materials to remove the heavy metal pollutants from the aqueous solutions not only exhibits high removal performance but also enables the spent adsorbents to be easily disposed using a low strength magnetic separation device [ 14 ]. In the recent literature, studies concerning the magnetic biochars used for controlling the heavy metal pollution, a variety of magnetic components were loaded/coated on the biochars derived from a wide range of biomass sources, thus, improving the structure and functionality [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

Zhao

Cai

et al. 2020

Molecules

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A series of the magnetic CuFe2O4-loaded corncob biochar (CuFe2O4@CCBC) materials was obtained by combining the two-step impregnation of the corncob biochar with the pyrolysis of oxalate. CuFe2O4@CCBC and the pristine corncob biochar (CCBC) were characterized using XRD, SEM, VSM, BET, as well as pHZPC measurements. The results revealed that CuFe2O4 had a face-centered cubic crystalline phase and was homogeneously coated on the surface of CCBC. The as-prepared CuFe2O4@CCBC(5%) demonstrated a specific surface area of 74.98 m2·g−1, saturation magnetization of 5.75 emu·g−1 and pHZPC of 7.0. The adsorption dynamics and thermodynamic behavior of Pb(II) on CuFe2O4@CCBC and CCBC were investigated. The findings indicated that the pseudo-second kinetic and Langmuir equations suitably fitted the Pb(II) adsorption by CuFe2O4@CCBC or CCBC. At 30 °C and pH = 5.0, CuFe2O4@CCBC(5%) displayed an excellent performance in terms of the process rate and adsorption capacity towards Pb(II), for which the theoretical rate constant (k2) and maximum adsorption capacity (qm) were 7.68 × 10−3 g·mg−1··min−1 and 132.10 mg·g−1 separately, which were obviously higher than those of CCBC (4.38 × 10−3 g·mg−1·min−1 and 15.66 mg·g−1). The thermodynamic analyses exhibited that the adsorption reaction of the materials was endothermic and entropy-driven. The XPS and FTIR results revealed that the removal mechanism could be mainly attributed to the replacement of Pb2+ for H+ in Fe/Cu–OH and –COOH to form the inner surface complexes. Overall, the magnetic CuFe2O4-loaded biochar presents a high potential for use as an eco-friendly adsorbent to eliminate the heavy metals from the wastewater streams.

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Section: Results and Analysissupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

Zhao

Cai

et al. 2020

Molecules

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“…Magnetic separation is a renewable recycling technology [ 8 ] that is characterized by higher efficiency compared with other separation methods (e.g., sedimentation, filtration) and is frequently applied in water purification. Magnetically responsive low-cost biological materials have been prepared using various modification procedures and subsequently used as biosorbents [ 2 , 9 ]. In addition to effective magnetic separation, magnetic functionalization may affect the adsorption capacity of biosorbents.…”

Section: Introductionmentioning

confidence: 99%

Magnetically Functionalized Moss Biomass as Biosorbent for Efficient Co2+ Ions and Thioflavin T Removal

et al. 2020

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Microwave synthesized iron oxide nanoparticles and microparticles were used to prepare a magnetically responsive biosorbent from Rhytidiadelphus squarrosus moss for the rapid and efficient removal of Co2+ ions and thioflavin T (TT). The biocomposite was extensively characterized using Fourier transformed infrared (FTIR), XRD, SEM, and EDX techniques. The magnetic biocomposite showed very good adsorption properties toward Co2+ ions and TT e.g., rapid kinetics, high adsorption capacity (218 μmol g−1 for Co and 483 μmol g−1 for TT), fast magnetic separation, and good reusability in four successive adsorption–desorption cycles. Besides the electrostatic attraction between the oxygen functional moieties of the biomass surface and both Co2+ and TT ions, synergistic interaction with the –FeOH groups of iron oxides also participates in adsorption. The obtained results indicate that the magnetically responsive biocomposite can be a suitable, easily separable, and recyclable biosorbent for water purification.

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“…9 Several methods have been used for the removal of heavy metals from wastewater, like precipitation, complexation, flotation, solvent extraction, adsorption, membrane processing and electrolysis. 10 A variety of chemicals have been utilized in the treatment of wastewater like activated carbon, 11,12 polyacrylamide 13 lignin and its derivatives [14][15][16] branched polyethylenimine (PEI), sodium dodecyl sulfate (SDS) [17][18][19] etc. Low-cost and environment friendly inorganic-organic composite membranes have been used for aquatic dyes removal 20 .…”

Section: Introduction *mentioning

confidence: 99%

Synthesis of novel sugar based xanthates for the removal of copper and nickel harmful heavy metals from water

Nath¹,

Pande²

2020

Rev.Roum.Chim.

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Sugar based xanthates viz D-sorbitol xanthate and D-mannitol xanthate (DSX1, DSX2, DMX1 and DMX2) have been synthesized by the reaction of D-sorbitol (DS)/ D-mannitol (DM) with carbon disulfide (CS 2) in basic medium at room temperature by varying carbon disulphide and base ratio with respect to sugars. The synthesized xanthates were extracted with ether, and dried in air. The xanthates were characterized by micro analytical data, Elemental analysis (C, H, O, S), Fourier transform infrared (FTIR) spectroscopy, and 1 H nuclear magnetic resonance (1HNMR) spectroscopy. The synthesized xanthates were used for the removal of Cu 2+ and Ni 2+ form aqueous solutions. The metal complexes formed during the process of removal of metal ions were confirmed with FTIR spectroscopy. The removal of copper and nickel metal from water was quantitatively determined by UV-visible absorption spectroscopy.

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Critical review of magnetic biosorbents: Their preparation, application, and regeneration for wastewater treatment

Cited by 133 publications

References 284 publications

Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

Magnetically Functionalized Moss Biomass as Biosorbent for Efficient Co2+ Ions and Thioflavin T Removal

Synthesis of novel sugar based xanthates for the removal of copper and nickel harmful heavy metals from water

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