Different adsorption behaviors and mechanisms of a novel amino-functionalized hydrothermal biochar for hexavalent chromium and pentavalent antimony

Deng, Jiaqin; Li, Xiaodong; Xue, Wei; Liu, Yunguo; Liang, Jie; Shao, Yongfu; Huang, Wei; Cheng, Xiaojuan

doi:10.1016/j.biortech.2020.123438

Cited by 79 publications

(14 citation statements)

References 42 publications

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“…The adsorption peaks at 1633 and 1136 cm –1 are attributed to the stretching vibrations of CN and C–N, respectively. The characteristic peak at 1541 cm –1 is attributed to the CC vibration peak . The nitrogen- and oxygen-containing functional groups are produced by the carbonization of chitin in crab shells.…”

Section: Resultsmentioning

confidence: 99%

“…The characteristic peak at 1541 cm −1 is attributed to the CC vibration peak. 15 The nitrogen-and oxygen-containing functional groups are produced by the carbonization of chitin in crab shells. The spectra of the composites after adsorbing Sb(III) and Sb(V) show a new characterized peak at 1384 and 1094 cm −1 , which are attributed to the stretching vibrations of Sb−O and Sb− OH, respectively, 16 implying that antimony was abundantly adsorbed on Cs/Fe-La.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ultimate Resourcization of Waste: Crab Shell-Derived Biochar for Antimony Removal and Sequential Utilization as an Anode for a Li-Ion Battery

Zhang

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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The development of high-capacity adsorbents is pivotal for the removal of antimonite (Sb(III)) and antimonate (Sb(V)) as priority pollutants in water. Herein, a Fe-La-doped biomass carbon adsorbent (Cs/Fe-La) was prepared for efficient removal of both Sb(III) and Sb(V). Cs/Fe-La shows excellent adsorption behavior for both Sb(III) and Sb(V) at 40 °C with a maximum capacity of 498 and 337 mg/g, respectively. Additionally, the antimony adsorption mechanism and the contribution of Cs/Fe-La composition to high capacity were analyzed based on the characterization of physicochemical analysis and adsorption studies, and the pseudo-second-order kinetic model as well as the Langmuir model fit the results well. Remarkably, considering the secondary pollution caused by direct disposal of antimony-containing waste adsorbents, an antimony-enriched waste adsorbent (Cs/Fe-La-SbO x ) was used as an anode material for a Li-ion battery. The heat-treated waste adsorbent exhibited good cycling performance with a reversible specific capacity of 833.8 mAh/g after 500 cycles. This work has demonstrated a promising pathway that can achieve the removal and sustainable utilization of antimony simultaneously by minimizing antimony contamination and maximizing the recycling of antimony-enriched adsorbents.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Ultimate Resourcization of Waste: Crab Shell-Derived Biochar for Antimony Removal and Sequential Utilization as an Anode for a Li-Ion Battery

Zhang

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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“…The solubility product constant ( K sp ) values of Sb 2 O 3 are 7.9 × 10 –18 for SbO(OH) and 4.0 × 10 –42 for Sb(OH) 3 when reacting with water. This together with the sensitivity of the speciation methodology (detection limit 0.5–1.0 μg/L) may account for not observing dissolved Sb III …”

Section: Results and Discussionmentioning

confidence: 99%

Transformation of Antimonate at the Biochar–Solution Interface

Rahman

Sanderson

et al. 2021

ACS EST Water

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Antimony (Sb) is a potentially carcinogenic contaminant that is also of notable commercial and industrial demand. Antimony's toxicity is increased by the redox transformation of pentavalent antimony (Sb V ) to its trivalent form (Sb III ). This study reports the redox transformation of Sb at the biochar−water interface by using a range of analytical techniques. The X-ray diffraction analysis revealed the reduction of Sb V to Sb III and the formation of Sb 2 O 3 (senarmonite, which is a proven carcinogenic compound) when reacted with biochar. Under oxic conditions, the X-ray photoelectron spectroscopy (XPS) data confirmed the redox transformation of Sb V to Sb III on the surface of the biochars. The transformation of Sb V to Sb III in the aqueous phase could not be detected by high-performance liquid chromatography with inductively coupled plasma mass spectrometry (HPLC−ICP-MS). The maximum Sb V adsorption capacity by cow manure (CMBC) and horse manure (HMBC) biochar was 12.87 and 16.56 mg/g, respectively. The experimental Sb V sorption data were fitted with the second order rate kinetics and the Freundlich isotherm model, indicating that the sorption was a multilayer form on the heterogeneous surface of biochar through electrostatic attraction and surface complexation followed by precipitation and reduction. The results demonstrate the transformation of Sb V to potentially more toxic forms when reacted with biochar, questioning the suitability of biochar for environmental remediation applications.

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“…The efficiency of heavy metal removal by biochar is influenced by the physicochemical properties of biochar, biochar dosage, pH, water temperature, and initial concentrations and types of heavy metals [14]. However, research on biochar-mediated Sb removal has only been attempted recently [1,[8][9][10]15,16].…”

Section: Introductionmentioning

confidence: 99%

Application of Fe-Impregnated Biochar from Cattle Manure for Removing Pentavalent Antimony from Aqueous Solution

et al. 2021

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This study assessed the applicability of Fe-impregnated biochar derived from cattle manure (Fe-CMB) as an adsorbent for removing Sb(V) from aqueous solutions and investigated the Sb(V) adsorption mechanism. Fe-CMB was mainly composed of C, O, Cl, Fe, Ca, and P, and the adsorption of Sb(V) onto Fe-CMB was identified using an energy dispersive spectrometer and Fourier transform infrared spectroscopy. Sb(V) adsorption reached equilibrium within 6 h, and the Sb(V) adsorption data as a function of time were well described by the pseudo-second-order model. The Langmuir isotherm model fit the equilibrium data better than the Freundlich model. The maximum adsorption capacity of Fe-CMB for Sb(V) obtained from the Langmuir model was 58.3 mg/g. Thermodynamic analysis of Sb(V) adsorption by Fe-CMB indicated that the adsorption process was exothermic and spontaneous. The Sb(V) removal percentage increased with the Fe-CMB dose, which achieved a removal of 98.5% at 10.0 g/L Fe-CMB. Increasing the solution pH from 3 to 11 slightly reduced Sb(V) adsorption by 6.5%. The inhibitory effect of anions on Sb(V) adsorption followed the order: Cl− ≈ NO3− < SO42− < HCO3− < PO43−.

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Different adsorption behaviors and mechanisms of a novel amino-functionalized hydrothermal biochar for hexavalent chromium and pentavalent antimony

Cited by 79 publications

References 42 publications

Ultimate Resourcization of Waste: Crab Shell-Derived Biochar for Antimony Removal and Sequential Utilization as an Anode for a Li-Ion Battery

Ultimate Resourcization of Waste: Crab Shell-Derived Biochar for Antimony Removal and Sequential Utilization as an Anode for a Li-Ion Battery

Transformation of Antimonate at the Biochar–Solution Interface

Application of Fe-Impregnated Biochar from Cattle Manure for Removing Pentavalent Antimony from Aqueous Solution

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