Sorbent Properties of Orange Peel-Based Biochar for Different Pollutants in Water

Zhang, Weichao; Wang, Yuwei; Fan, Liquan; Liu, Xingmei; Cao, Weiyan; Ai, Honglin; Wang, Ziteng; Liu, Xijun; Jia, Hongge

doi:10.3390/pr10050856

Cited by 18 publications

(6 citation statements)

References 28 publications

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“…The diffractogram of Ni/BC exhibits specific peaks at 2θ of 27.5°, 44.8 and 52.3°, associated with 220, 111 and 200 reflections of a-FCC of single nickel nanoparticles (Ni), referring to JCPDS: 03-1051 [ 15 , 16 , 17 ]. In addition, a small broad peak ranging from 20°–30° is also identified similar to the broad peak in BC, implying the presence of a structure of aromatic layers (graphite 002) [ 18 , 19 ]. The broad peak expresses a small dimension of crystallites perpendicular to the aromatic layers as the characteristic of biochar structure.…”

Section: Resultsmentioning

confidence: 99%

Nanocomposite of Nickel Nanoparticles-Impregnated Biochar from Palm Leaves as Highly Active and Magnetic Photocatalyst for Methyl Violet Photocatalytic Oxidation

et al. 2022

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Photocatalysis has been recognized as a feasible method in water and wastewater treatment. Compared to other methods such as adsorption and chemical oxidation, the use of photocatalyst in the advanced oxidation processes gives benefits such as a longer lifetime of the catalyst and less consumable chemicals. Currently, explorations into low-cost, effective photocatalysts for organic contaminated water are being developed. Within this scheme, an easily separated photocatalyst with other functionality, such as high adsorption, is important. In this research, preparation of a magnetic nanocomposite photocatalyst based on agricultural waste, palm leaves biochar impregnated nickel nanoparticles (Ni/BC), was investigated. The nanocomposite was prepared by direct pyrolysis of palm leaves impregnated with nickel (II) chloride precursor. Furthermore, the physicochemical characterization of the material was performed by using an X-ray diffractometer (XRD), scanning electron microscopy-energy dispersive X-ray fluorescence (SEM-EDX), transmission electron microscopy (TEM), gas sorption analysis, X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer (VSM). The photocatalytic activity of Ni/BC was evaluated for methyl violet (MV) photocatalytic oxidation. The results from XRD, XPS and TEM analyses identified single nickel nanoparticles dispersed on the biochar structure ranging from 30–50 nm in size. The dispersed nickel nanoparticles increased the BET specific surface area of biochar from 3.92 m2/g to 74.12 m2/g oxidation. High photocatalytic activity of the Ni/BC was exhibited by complete MV removal in 30 min for the concentration ranging from 10–80 mg/L. In addition, the Ni/BC showed stability in the pH range of 4–10 and reusability without any activity change until fifth usage. The separable photocatalyst is related to magnetism of about 13.7 emu/g. The results highlighted the role of biochar as effective support for Ni as photoactive material.

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Section: Resultsmentioning

confidence: 99%

Nanocomposite of Nickel Nanoparticles-Impregnated Biochar from Palm Leaves as Highly Active and Magnetic Photocatalyst for Methyl Violet Photocatalytic Oxidation

et al. 2022

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“…The specific surface area, total pore volume and pore diameter (nm) are summarized in Table 1. Comparing the C1 and C2 adsorbents, it can be observed that at high temperatures, the organic matter in the orange peel decomposes, increasing the specific surface area [34]. After the heat treatment, in addition to the specific surface, the total volume of the pores also increases.…”

Section: Surface Area Determinationmentioning

confidence: 99%

Adsorbent Biomaterials Based on Natural Clays and Orange Peel Waste for the Removal of Anionic Dyes from Water

Mihai,

Bondarev,

Călin

et al. 2024

Processes

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This study demonstrates the efficient removal of Alizarin Yellow R anionic dye (AY) from aqueous solutions using green adsorbents. Natural kaolin clay (A1), acid-modified natural clay (A2), chemically treated orange peel (C1) and biochar produced by the thermal treatment of orange peel (C2) were tested for the adsorption of AY. The characteristics of the sorbents were determined by instrumental methods: SEM, EDS, FTIR, BET and TGA. The adsorption experiments were performed under different conditions, including the initial AY dye concentration, adsorbent weight, pH, temperature and contact time. The maximum adsorption capacities had values between 15.72 and 74.62 mg/g at 298 K and the optimal pH of 6.5 at initial concentrations ranging from 30 to 70 mg/L for all adsorbents. The equilibrium data were used for the adsorption isotherm models: Freundlich, Langmuir and Temkin. The Freundlich model fit best for the adsorbents A2, C1 and C2, and the Langmuir isotherm had the highest regression value for the adsorbent A1 (R2 = 0.9935). Thermodynamic parameters indicated the spontaneous and favorable adsorption process of AY. A study of the adsorption kinetics proved that they best fit the pseudo-second-order model, with the highest coefficients of determination (R2), outperforming the pseudo-first-order model. The results of this study indicate the potential for the valorization of locally available clays and orange peel waste in the purification processes of water.

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“…Do et al [30] used NaOH modifed Moringa oleifera leaf to prepare activated biochar to remove MB from aqueous solution. Te study showed that the maximum adsorption capacity for MB was 136.99 mg/ g when the pH was 7 and the adsorbent dosage was 1.67 g/ L. Activated biochar was mainly prepared by chemical activation and physical activation methods, of which, ZnCl 2 , KOH, and NaOH are commonly used as activators to produce activated biochar with high specifc surface area [31][32][33]. NaOH and KOH are commonly used for lignocellulosic biomass chemical activation [34].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nanoporous Biochar from Rice Husk for Adsorption of Methylene Blue

Dang,

Mei,

Yan

et al. 2023

Journal of Chemistry

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In this study, rice husk charcoal prepared with KOH and KOH-NaOH as activators were investigated as adsorbents for the removal of methylene blue from aqueous solutions in order to improve the utilisation of rice husk. Firstly, the rice husk carbon was morphologically and chemically characterised using scanning electron microscopy, specific surface area analyser, and infrared spectroscopy. Secondly, the effects of the alkali-carbon ratio, pyrolysis temperature, and pyrolysis time on the activation of KOH alone and combined activation of KOH-NaOH were investigated. The results showed that the adsorption capacity of the activated biochar was 359.7 mg/g (higher than that of 315.4 mg/g when KOH alone was activated) under the same adsorption conditions when KOH-NaOH was coactivated. Finally, combined with the characterization results and data analysis, it can be seen that the rice husk carbon obtained by KOH-NaOH composite activation is predominantly microporous with a more uniform pore size distribution, making it an economical and efficient adsorbent for the removal of methylene blue from aqueous solutions.

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Sorbent Properties of Orange Peel-Based Biochar for Different Pollutants in Water

Cited by 18 publications

References 28 publications

Nanocomposite of Nickel Nanoparticles-Impregnated Biochar from Palm Leaves as Highly Active and Magnetic Photocatalyst for Methyl Violet Photocatalytic Oxidation

Nanocomposite of Nickel Nanoparticles-Impregnated Biochar from Palm Leaves as Highly Active and Magnetic Photocatalyst for Methyl Violet Photocatalytic Oxidation

Adsorbent Biomaterials Based on Natural Clays and Orange Peel Waste for the Removal of Anionic Dyes from Water

Synthesis of Nanoporous Biochar from Rice Husk for Adsorption of Methylene Blue

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