Synthesis of Ce-doped magnetic biochar for effective Sb(V) removal: Performance and mechanism

Wang, Li; Wang, Jingyi; Wang, Zixuan; Feng, Jiangtao; Li, Shanshan; Yan, Wei

doi:10.1016/j.powtec.2019.01.022

Cited by 55 publications

(37 citation statements)

References 50 publications

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“…(882.00ev, 890.00ev and 900.00ev) and Ce 2p1/2 (916.00ev) [4,28], which were mainly ascribed to Ce-O bonds and the values are very close to those of cerium dioxide(CeO2) and dicerium trioxide (Ce2O3) reported in the literatures [4,14]. So, we inferred that Ce 3+ and Ce 4+…”

Section: Characterization Analysissupporting

confidence: 75%

“…As shown in Fig.2(a and (422) Cerianite crystal faces [36], respectively. However, in HCO-doped-(Fe3O4)x adsorbents, the intensity of the Cerianite character diffraction peak decreased and the position of character diffraction peak changed, suggesting that Fe doping changed the crystal structure of Cerianite [4,28], and formed a lot of multi-pore adsorbents. Combined with the analysis of XPS peak software, the results implied that the compound reaction between Fe3O4 and HCO occurred in the preparation process (Eq.…”

Section: Characterization Analysismentioning

confidence: 99%

“…Therefore, more hydroxyl group would be formed with the increase of Ce/Fe molar ratio, and corresponding Sb(III) removal rate increased. However, Sb(V) ions were mainly removed by the complexation of FeOOH and X≡Fe-OH [4,28]. The higher concentration of HCO doped elements hampered the nucleation process of amorphous iron particles, and corresponding the structure and valence of amorphous iron (Fe3O4) were affected [4], thereby reducing the removal performance of Sb(V).…”

Section: Effect Of Ce/fe Molar Ratiomentioning

confidence: 99%

“…Recently, it has been found that Fe3O4 doped with manganese, zirconium, cerium or other metals can be prepared as bimetallic composite adsorbent with porous structure [16][17][18][19], so as to improve its adsorption capacity [4,[20][21][22], and retain the advantages of Fe3O4, such as deposition speed, easy recovery and recycling [23][24][25][26]. One of the most abundant rare earth metals , cerium ions and CeO2 aqueous can carry many high affinity surface hydroxyl groups [27] with cerium ions providing a more positive charge density on the surface of adsorbent, which is conducive to the adsorption and removal of oxyanions of Sb, As and Cr [22,28]. Therefore, cerium and its oxides have received much attention in recent years in purification of water contaminated by metal ion [29,30].…”

Section: Introductionmentioning

confidence: 99%

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Optimal Synthesis and Mechanistic Performance of HCO-Doped-(Fe3O4)x Adsorbent for Sb(III)/Sb(V) Removal From Water

Deng¹,

Zhang²,

Hu³

et al. 2020

Preprint

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Concern over potential antimony mediated toxicity from mining and smelting activities has instigated novel concepts toward removing aqueous antimony ions. The iron based adsorbent Fe3O4/HCO was found to be efficient for treating antimony-containing wastewater However, ineffective methodology for preparation limited its effective adsorption capacity and thus wider application. In this study, a new type of HCO-doped-(Fe3O4)x adsorbent was prepared by co-precipitation method for doping Fe3O4 into HCO sludge (HCO), thereby improving adsorption performance for Sb(III) and Sb(V) ions, with the maximum adsorbing capacity being 44.46 mg/g and 47.91 mg/g, respectively. According to the results of BET, SEM-EDS, XRD and XPS, it were confirmed that the FeOOH and X&equiv;Fe-OH were formed during the preparation process, bring about the increased the surface area, thus resulting in further increase of surface area, hydroxyl groups and the net negative ionic charge. Moreover, the adsorption kinetics followed the pseudo-second-order kinetic model which indicated that adsorption process of Sb(III)/Sb(V) by HCO-doped-(Fe3O4)x adsorbent was controlled by chemical reaction. The main adsorption mechanism is that antimony ion and amorphous iron oxide X&equiv;Fe-OH undergo coordination exchange reaction and complexation reaction with CeO2 or Ce2O3. Furthermore, HCO-doped-(Fe3O4)x could adapt to wide pH and had stable adsorption ability after regeneration. The good adsorption performance of HCO-doped-(Fe3O4)x makes it a potential applications of adsorbent for removal of antimony.

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Section: Characterization Analysissupporting

confidence: 75%

Section: Characterization Analysismentioning

confidence: 99%

Section: Effect Of Ce/fe Molar Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal Synthesis and Mechanistic Performance of HCO-Doped-(Fe3O4)x Adsorbent for Sb(III)/Sb(V) Removal From Water

Deng¹,

Zhang²,

Hu³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Also, nano-TiO 2 electroactive carbon nanotube (CNT) filter and ZrO 2 -carbon nanofibers (ZNC) were tested, respectively, for Sb(III) and simultaneous Sb(III) and Sb(V) removal; in particular, it was reported that the adsorption capacity of Sb(III) is much higher than Sb(V) in ZNC [19,20]. Recent works showed that the acidic conditions are also favorable for the Sb(V) removal from solution by La and Ce-doped magnetic biochars [21,22]. With respect to the other sorbents, layered double hydroxides (LDHs) show the advantage of being able to remove hazardous anions from solution at circumneutral pH, and can therefore be potential removers for Sb(OH) 6 − at the circumneutral pH and oxidizing conditions usually found in the environment [23].…”

Section: Introductionmentioning

confidence: 99%

Antimonate Removal from Polluted Mining Water by Calcined Layered Double Hydroxides

2019

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Calcined layered double hydroxides (LDHs) can be used to remove Sb(V), in the Sb(OH)6− form, from aqueous solutions. Sorption batch experiments showed that the mixed MgAlFe oxides, obtained from calcined hydrotalcite-like compound (3HT-cal), removed Sb(OH)6− through the formation of a non-LDH brandholzite-like compound, whereas the mixed ZnAl oxides, resulting from calcined zaccagnaite-like compound (2ZC-cal), trapped Sb(OH)6− in the interlayer during the formation of a Sb(V)-bearing LDH (the zincalstibite-like compound). The competition effect of coexistent anions on Sb(OH)6− removal was HAsO42− >> HCO3− ≥ SO42− for 2ZC-cal and HAsO42− >> HCO3− >> SO42− for 3HT-cal. Considering the importance of assessing the practical use of calcined LDHs, batch experiments were also carried out with a slag drainage affected by serious Sb(V) pollution (Sb = 9900 μg/L) sampled at the abandoned Su Suergiu mine (Sardinia, Italy). Results showed that, due to the complex chemical composition of the slag drainage, dissolved Sb(OH)6− was removed by intercalation in the interlayer of carbonate LDHs rather than through the formation of brandholzite-like or zincalstibite-like compounds. Both 2ZC-cal and 3HT-cal efficiently removed very high percentages (up to 90–99%) of Sb(V) from the Su Suergiu mine drainage, and thus can have a potential application for real polluted waters.

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Synergistic effect of surfactant hexadecyltrimethylammonium supporting and hydrous titania impregnation onto zeolite in enhanced removal of anionic X‐3B dye from aqueous solution

Deng

Cheng

et al. 2022

Env Prog and Sustain Energy

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A new modified zeolite (HTiZFA) was achieved by dually supporting hexadecyltrimethylammonium (HDTMA) and hydrous titania onto synthetic zeolite from coal fly ash via coating HDTMA and Ti(SO4)2 solution respectively, which has an increased adsorption activity for anion X‐3B dye from aqueous solution. HTiZFA with the optimum removal efficiency was obtained at the coating concentration of 13 mmol/L HDTMA, 20.8 mmol/L Ti(SO4)2, and 2 g/L dosage of zeolite. X‐ray fluorescence, X‐ray diffraction (XRD), scanning electron microscope‐energy dispersive, Fourier transform infrared, Brunauer Emmett Teller (BET), and zeta potential analysis are used to characterize the samples (HTiZFA). In XRD spectrum, no typical peak representing anatase TiO2 crystal suggested that hydrous titania which was impregnated on HTiZFA existed as an amorphous phase. The specific surface area of HTiZFA (32.73–37.71 m2/g) did not alter a lot compared with that of ZFA, but the surface charge of HTiZFA (pH = 8.55) shifted to positive greatly, which caused a considerable enhancement in X‐3B adsorption. It was found that X‐3B sorption on HTiZFA was almost independent on initial pH because the removal rate maintained above 96% in a wide pH range of 3.0–11.0. An increasing qe with an upward temperature confirmed versatile attractive interactions and endothermic sorption nature, and a good ability was observed after several adsorption/desorption circulations. HTiZFA is expected to be a multifunctional adsorbent for treating higher concentration anionic pollutants that cannot be removed by commonly modified products efficiently.

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Synthesis of Ce-doped magnetic biochar for effective Sb(V) removal: Performance and mechanism

Cited by 55 publications

References 50 publications

Optimal Synthesis and Mechanistic Performance of HCO-Doped-(Fe3O4)x Adsorbent for Sb(III)/Sb(V) Removal From Water

Optimal Synthesis and Mechanistic Performance of HCO-Doped-(Fe3O4)x Adsorbent for Sb(III)/Sb(V) Removal From Water

Antimonate Removal from Polluted Mining Water by Calcined Layered Double Hydroxides

Synergistic effect of surfactant hexadecyltrimethylammonium supporting and hydrous titania impregnation onto zeolite in enhanced removal of anionic X‐3B dye from aqueous solution

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