Preparation and Characterization of Biochar Derived from Agricultural By-Products for Dye Removal

Le, Phuong Thu; Bui, Huyen Thuong; Le, Duy Ngoc; Nguyen, Thi Hue; Pham, Le Anh; Nguyen, Hong Nam; Nguyen, Quoc Son; Nguyen, Thu Phuong; Bich, Ngoc Trinh; Duong, Thi Thuy; Herrmann, Marine; Ouillon, Sylvain; Le, Thi Phuong Quynh

doi:10.1155/2021/9161904

Cited by 33 publications

(15 citation statements)

References 63 publications

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“…Their removal from aquatic reservoirs and wastewater is of great concern, so water purification methods have been developed that propose many materials for use as adsorbents. Activated carbon [2], biochar [3], zeolites [4,5], biosorbents [6], and metal organic frameworks (MOFs) [7,8] have all been investigated and used. Recently, nanomaterials have been proposed as novel adsorbents offering a high volume-to-surface ratio, high adsorption capacity, cost-effective processing, and feasibility.…”

Section: Introductionmentioning

confidence: 99%

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

et al. 2022

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In this work, we present magnetic nanoparticles based on iron oxide doped with zinc synthesized using the wet co-precipitation method for environmental application. The morphology of the samples was revealed by SEM and TEM, which showed particles of granular shape and size of about 15 nm. The specific surface areas of the materials using the BET method were within the range of 85.7 to 101.5 m2 g−1 depending on the zinc content in the superparamagnetic iron oxide nanoparticles (SPIONs). Magnetometry was performed to determine the magnetic properties of the particles, indicating superparamagnetism. Synthesized magnetic nanoparticles with different amounts of zinc dopant were used as an adsorbent to remove model pollutant Titan yellow (TY) from the aqueous solutions. Adsorption was determined by investigating the effects of sorbent amount, dye concentration, and contact time. The synthesized material removed Titan yellow quickly and efficiently within the physical adsorption. The adsorption isotherms were consistent with the models proposed by Langmuir and Redlich-Peterson. The monolayer adsorption capacities were 30 and 43 mg g−1 for Fe3O4 and Fe3O4@10%Zn, respectively, for the removal of TY. However, that of Congo red is 59 mg g−1 by Fe3O4@10%Zn. The proposed nanoparticles offer fast and cost-effective water purification, and they can be separated from solution using magnets.

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Section: Introductionmentioning

confidence: 99%

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

et al. 2022

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“…Considering the similarity of the three spectra, even though the BC went through different activation conditions, the structure of the materials after pyrolysis remained the same. The diffraction diagram of the BC activated by NaOH-4h in the previous study (Le et al, 2021) showed two wide peaks within a range of 2θ = 22.5° and 2θ = 43° which indicates that the BCs were amorphous carbon. In addition, the diagrams revealed the presence of graphene structure in all BC samples derived from agricultural byproducts.…”

Section: Characterization Of Modified Biocharmentioning

confidence: 80%

“…The rice husk was fully covered with a layer of commercial charcoal, this was to prevent the rice husk BC from turning into ash and maintain its original husk shape. The pyrolysis was carried out under a heating program in a Nabertherm furnace (Germany), which raised the temperature to 600°C with a heating rate of 5°C.min -1 for a period of 2 hours (Le et al, 2021).…”

Section: Preparation Of Biocharmentioning

confidence: 99%

Removal of methylene blue from aqueous solution by biochar derived from rice husk

Thuong

Phuong

Thu

et al. 2022

Vietnam J. Earth Sci.

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In this research, rice husk-derived biochar (BC) was evaluated to determine the suitable conditions for the methylene blue (MB) solution adsorption. The characterization of BC was identified by the methods of FT-IR, Raman, and point of zero charges (PZC). The adsorption studies were carried out with BC at different activation conditions (raw BC, HNO3 25% for 4 hours, NaOH 25% for 4 hours, H2O at 90°C for 2 hours and 4 hours, HNO3 25% at 90°C for 2 hours and 4 hours). The activated material then went through an adsorption assessment. Activated BC with NaOH 25% showed its preeminence compared to the other six conditions when reaching the maximum efficiency after the first hour of adsorption. The investigation revealed that the adsorption capacity of the material depends on the activation methods, including pH, activation agent, temperature, and time. The adsorption of BC was consistent with the pseudo-first-order kinetic model and the Langmuir isotherm model, with high correlation coefficients (R2: 0.9838 and 0.9975, respectively). Therefore, it can be concluded that the use of rice husk is feasible for the removal of MB from aqueous solutions.

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“…Modern research has shown that this plant contains active substances, such as flavonoids, lignans, phenolic aldehydes, and phenylpropanoids. Accordingly, products made from snow lotus are used in many fields, such as medical, cosmetic, and health care products (Le et al, 2021; Lian et al, 2014). With the development of the modern pharmaceutical technology, the emergence of proprietary Chinese medicines such as snow lotus injection, has expanded the development and promotion of traditional Chinese medicine (TCM) providing new ideas (Gong et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Multi‐factorial investigation of the effect of biochar of the secondary medicinal residue of snow lotus on the adsorption of two azo dyes, methyl red and methyl orange

Zhang

Yao²,

et al. 2023

Microscopy Res & Technique

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Azo dye residues pollute water, which are difficult to decompose, and posing a major threat to the ecological environment. The residues of Chinese medicine still have many possibilities for use after its medicinal value has been brought into play. In this study, secondary residue biochar activation (Na2CO3‐modified, SBA) and secondary residue biochar (unmodified, SBC) were prepared from the secondary residue of snow lotus at 200–600°C. Surface features were obtained by Brunauer–Emmett–Teller N2 method and combined with scanning electron microscopy, and their structures were analyzed by x‐ray diffraction spectroscopy, Fourier infrared and near‐infrared spectroscopy. The effects of five factors, including initial concentration, contact time and adsorption temperature and so forth, on the adsorption of methyl red (MR) and methyl orange (MO) solutions were investigated. Results showed that the biochar yield, specific surface area, and pore size increased after modification. modification promoted the formation of the internal structure aromatization and oxygen‐containing functional groups. Adsorption experiments showed that the surroundings pH = 8, the dyes adsorption concentration of 8 mg/L, adsorption temperature of 20–40°C and time of about 1 h were more stable. Under the condition, the removal of MO by SBA could reach approximately 60%–80% (480–640 mg/g), while the removal of MR could reach more than 90% (>720 mg/g).The charcoal prepared and modified under high temperature conditions was more effective for MO adsorption, while MR relied on low temperature effectively. This study provides a new choice of adsorbent for MR and MO and finds a new direction for the utilization of snow lotus residues.

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Preparation and Characterization of Biochar Derived from Agricultural By-Products for Dye Removal

Cited by 33 publications

References 63 publications

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

Removal of methylene blue from aqueous solution by biochar derived from rice husk

Multi‐factorial investigation of the effect of biochar of the secondary medicinal residue of snow lotus on the adsorption of two azo dyes, methyl red and methyl orange

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