Efficient Capture of Phosphate and Cadmium Using Biochar with Multifunctional Amino and Carboxylic Moieties: Kinetics and Mechanism

Faheem, Faheem; Du, Jiangkun; Bao, Jianguo; Hassan, Muhammad Azher; Irshad, Sana; Talib, Muhammad Afnan; Zheng, Han

doi:10.1007/s11270-019-4389-1

Cited by 25 publications

(11 citation statements)

References 53 publications

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“…The values of ΔG°, ΔH°, and ΔS°are reported in Table 3. The positive value of entropy of adsorption ΔS°reflects the affinity of the sorbent MnFe 2 O 4 nanoparticles toward lead(II), and the positive value of enthalpy change ΔH°and the negative values of free energy change (ΔG°) at all temperatures confirmed that the adsorption process of lead(II) ions was endothermic and thermodynamically spontaneous (Foroutan et al 2018).…”

Section: Thermodynamic Parametersmentioning

confidence: 74%

“…where C e (mg/L) is the equilibrium concentration of lead(II) ions in solution, Q e refers to the equilibrium quantity of lead(II) ions adsorbed onto MnFe 2 O 4 nanoparticles at equilibrium, Q M (mg/g) is the maximum adsorption capacity, and b (L/g) is a constant related to the adsorption intensity. The maximum adsorption capacity (Q M ) is the monolayer coverage of adsorbent with adsorbate, and b is the energy of adsorption that changes with temperature (Faheem et al 2020).…”

Section: Langmuir Isothermsmentioning

confidence: 99%

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Magnetically synthesized MnFe2O4 nanoparticles as an effective adsorbent for lead ions removal from an aqueous solution

Hassan

Aly

2021

Journal of Water Supply: Research and Technology-Aqua

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The adsorption behavior of lead(II) using a new magnetic adsorbent is investigated. The facile synthesis of MnFe2O4 was carried out using the co-precipitation method. The different parameters that affected the adsorption process were investigated such as contact time, metal ion concentration, pH, temperature, and the adsorbent dosage. The maximum lead(II) sorption capacity was found to be 75.75 (mg/g) and obtained using 1 g/L MnFe2O4 when pH equals 5.3, a temperature of 25 °C, and contact time as 60 min. The adsorption isotherm study indicated that the Langmuir model was the best model that described the adsorption process using 1 g/L MnFe2O4. Based on the values of correlation coefficient data (R2), the kinetic adsorption parameters were well defined by the second-order kinetic model. Furthermore, the temperature effect findings have been confirmed that the removal of lead ions was endothermic. The desorption efficiency reached more than 88% when used 0.01 M NaOH as an eluent.

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Section: Thermodynamic Parametersmentioning

confidence: 74%

Section: Langmuir Isothermsmentioning

confidence: 99%

Magnetically synthesized MnFe2O4 nanoparticles as an effective adsorbent for lead ions removal from an aqueous solution

Hassan

Aly

2021

Journal of Water Supply: Research and Technology-Aqua

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“…Furthermore, peaks at 399.8 and 400.9 eV in N 1s spectra (Figure 4d) are fitted to C−NH 2 and NH−C=O groups in Cts sample [54] . For Cts/mTiO 2 composite nanoparticles, the peak located at 401.8 eV, which has a slight shift (0.9 eV) toward higher binding energy compared to that of Cts, can be attributed to protonated amino groups (−NH 3 + ) [55] . In addition, the existence of N atom is also confirmed in the EDS spectrum of Cts/mTiO 2 composite (Figure S3).…”

Section: Resultsmentioning

confidence: 96%

Facile Preparation of Chitosan‐modified Mesoporous Titanium Dioxide Film on Fused‐silica Capillary for Selective Enrichment of Phosphopeptides

Jiao

Wei

et al. 2021

ChemNanoMat

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Chitosan (Cts), a positively charged natural polysaccharide, is employed to functionalize mesoporous titanium dioxide (mTiO2) nanoparticles. The prepared Cts/mTiO2 composite was used as a stationary phase to coat the inner wall of fused‐silica capillary and obtain uniform Cts/mTiO2 film. The Cts/mTiO2 film is applied to detect and enrich phosphopeptides in complex biological samples based on typical in‐tube solid phase microextraction (IT‐SPME) system. This unique Cts/mTiO2 film exhibits excellent enrichment performances of high selectivity (β‐casein and BSA in molar ratio of 1 : 1000), sensitivity (detection limit as low as 40 fmol of β‐casein tryptic digest solution) and high adsorption capacity (124.5 μg mg−1). Meanwhile, the Cts/mTiO2 film possesses preferable reusability and can be reused more than 10 times. These results confirm that the Cts/mTiO2 film possesses potential and satisfactory prospects in phosphoproteomics analysis.

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“…Also, the isotherms presented an L1 shape, which means that there is an initial curved portion at lower equilibrium concentrations, indicating the affinity adsorbate-adsorbent (Giles et al 1960). The Langmuir and Freundlich isothermal models were selected because they are commonly used to examine the process of phosphate transfer from the liquid to biochar surfaces (Faheem et al 2020). The Temkin model presumes that adsorption is a multi-layer process (Wang & Guo 2020).…”

Section: Equilibrium Studiesmentioning

confidence: 99%

Phosphate adsorption improvement using a novel adsorbent by CaFe/LDH supported onto CO2 activated biochar

Missau

Rodrigues

Bertuol

et al. 2022

Water Science and Technology

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It is imperative to remove phosphate from the aquatic system. This nutrient in excess can cause environmental problems such as eutrophication. Therefore, aiming to enhance phosphate removal, this work presents a novel adsorbent developed from the construction of Ca2+/Fe3+ layer double hydroxides (CaFe/LDH) supported onto biochar physically activated with CO2 [CaFe/Biochar (CO2)]. Pristine biochar was produced from the pyrolysis of Eucalyptus saligna sawdust, activated with CO2, and then impregnated with CaFe/LDH. The CaFe/Biochar (CO2) was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET). The characterization confirmed a proper synthesis of the new adsorbent. Experiments were conducted in the form of batch adsorption. Results indicated that the optimum pH and adsorbent dosage were 2.15 and 0.92 g L−1, respectively. Adsorption kinetics, isotherms, and thermodynamics were also evaluated. Adsorption kinetics and isotherms were better fitted by the pseudo n order and Freundlich models, respectively. Results also indicated a better adsorption capacity (99.55 mg·g−1) at 55 °C. The thermodynamic indicators depicted that the adsorption process was favorable, spontaneous, and endothermic. Overall, CaFe/Biochar (CO2) could be potentially applied for the adsorptive removal of phosphate from an aqueous solution.

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Efficient Capture of Phosphate and Cadmium Using Biochar with Multifunctional Amino and Carboxylic Moieties: Kinetics and Mechanism

Cited by 25 publications

References 53 publications

Magnetically synthesized MnFe2O4 nanoparticles as an effective adsorbent for lead ions removal from an aqueous solution

Magnetically synthesized MnFe2O4 nanoparticles as an effective adsorbent for lead ions removal from an aqueous solution

Facile Preparation of Chitosan‐modified Mesoporous Titanium Dioxide Film on Fused‐silica Capillary for Selective Enrichment of Phosphopeptides

Phosphate adsorption improvement using a novel adsorbent by CaFe/LDH supported onto CO2 activated biochar

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