Adsorption of aromatic compounds by biochar: influence of the type of tropical biomass precursor

Jesus, J.H.F. de; Matos, Tassya Thaiza da Silva; Cunha, Graziele da Costa; Mangrich, Antônio S.; Romão, Luciane Pimenta Cruz

doi:10.1007/s10570-019-02394-0

Cited by 31 publications

(12 citation statements)

References 27 publications

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“…This indicates a higher carbonization degree of biochar with less hydrophilic surfaces (Wang et al, 2017). As a result, the H/C reduces from 3.6 to 1.1 and the O/C gradually reduces from 12.0 to 9.2, indicating a higher aromatization degree and the graphite-like structure of higher temperature biochar (Selmi et al, 2018;de Jesus et al, 2019). FTIR spectra in Figure 1 also prove the existence of a graphitelike structure as well as oxygen-content functional groups.…”

Section: Resultsmentioning

confidence: 86%

“…It is obvious that the total content of O-containing functional groups (i.e., C-O and C=O groups) becomes lower from 35.5 to 19.4%. According to previous studies (Liu et al, 2011;Wang et al, 2017;Jang et al, 2018;de Jesus et al, 2019), both the graphitelike structure and the O-containing functional groups contribute to the adsorption performance of biochar. Moreover, there are four types of N-containing functional groups: pyridinic nitrogen (N-6), pyrollic nitrogen (N-5), quaternary nitrogen (N-Q), and oxidized nitrogen (N-O).…”

Section: Resultsmentioning

confidence: 94%

“…The strong peak at 1,630 cm −1 is assigned to ether the aromatic stretching of C-C groups or the stretching of C=O, while the peaks at wavenumbers 2,923 and 2,854 cm −1 are due to the stretching vibrations of C-H groups (Liu et al, 2012;Ahsan et al, 2018;Pan et al, 2018). The broad band at 3,438 cm −1 could be assigned to the overlapping of -OH and -NH stretching (Pan et al, 2018;de Jesus et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

“…However, the differences in adsorption capacity among three biochars are vastly different from the difference in their surface areas, implying that the measured BET surface area may not be the main factor in determining the adsorbing ability. Based on the properties of biochar, possible adsorption mechanisms include pore-filling, hydrogen bonds, hydrophobic effect, electrostatic interactions, and π-π interactions (Wang et al, 2017;de Jesus et al, 2019). It has been reported that π-π interactions are one of the major mechanisms governing TC adsorption by biochar (Wang et al, 2017).…”

Section: Tc Adsorption By Biocharmentioning

confidence: 99%

“…It has been reported that π-π interactions are one of the major mechanisms governing TC adsorption by biochar (Wang et al, 2017). Biochar serves as a π-electron donor, which could be attributed to its graphite-like structure while TC acts a πelectron acceptor due to its aromatic ring structure (Wang et al, 2017;de Jesus et al, 2019). A higher pyrolysis leads to a higher degree of graphitization of biochar samples.…”

Section: Tc Adsorption By Biocharmentioning

confidence: 99%

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Application of Biochar Derived From Pyrolysis of Waste Fiberboard on Tetracycline Adsorption in Aqueous Solution

Gao

Lin

et al. 2020

Front. Chem.

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In this study, biochars derived from waste fiberboard biomass were applied in tetracycline (TC) removal in aqueous solution. Biochar samples were prepared by slow pyrolysis at 300, 500, and 800 • C, and were characterized by ultimate analysis, Fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), etc. The effects of ionic strength (0-1.0 mol/L of NaCl), initial TC concentration (2.5-60 ppm), biochar dosage (1.5-2.5 g/L), and initial pH (2-10) were systemically determined. The results present that biochar prepared at 800 • C (BC800) generally possesses the highest aromatization degree and surface area with abundant pyridinic N (N-6) and accordingly shows a better removal efficiency (68.6%) than the other two biochar samples. Adsorption isotherm data were better fitted by the Freundlich model (R 2 is 0.94) than the Langmuir model (R 2 is 0.85). Thermodynamic study showed that the adsorption process is endothermic and mainly physical in nature with the values of H 0 being 48.0 kJ/mol, S 0 being 157.1 J/mol/K, and G 0 varying from 1.02 to −2.14 kJ/mol. The graphite-like structure in biochar enables the π-π interactions with a ring structure in the TC molecule, which, together with the N-6 acting as electron donor, is the main driving force of the adsorption process.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Tc Adsorption By Biocharmentioning

confidence: 99%

Section: Tc Adsorption By Biocharmentioning

confidence: 99%

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Application of Biochar Derived From Pyrolysis of Waste Fiberboard on Tetracycline Adsorption in Aqueous Solution

Gao

Lin

et al. 2020

Front. Chem.

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Effect of biochar structure on the selective adsorption of heavy components in bio‐oil

Zhu,

Yan,

et al. 2024

Biofuels Bioprod Bioref

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In this study, biochars with different structures were prepared through HNO3 oxidation and secondary pyrolysis to study the relationship between the structure of biochar and its selectivity for the adsorption of light and heavy aromatics in bio‐oil. The results showed that the adsorption rates of biochar with different structures ranged from 2.90 to 4.00 g bio‐oil per g biochar. The influence of pore structure was dominant, followed by the influence of O‐containing functional groups and the degree of graphitization. The higher the adsorption capacity of biochar for bio‐oil, the smaller the concentrations of the light aromatic model compounds in the absorbed bio‐oil (ABO). Among the five light aromatics, biochar has the best adsorption selectivity for dihydroxybiphenyl and the worst for eugenol and propyl phenol. This is attributed to the diphenyl ring structure of dihydroxybiphenyl, which makes it more susceptible to adsorption, and other light model compounds only have one benzene ring. In summary, biochar demonstrates better adsorption selectivity for heavy aromatics than light aromatics. The more developed the pore structure is, the more enriched O‐containing functional groups are, and the higher the graphitization degree of biochar is, the better the selective adsorption of aromatic compounds in bio‐oil.

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A data synthesis on the biochar properties and implications for air, soil, and water quality in Brazil

Pôggere

Santana

Barbosa

et al. 2022

Environmental Quality Mgmt

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Biochar has been intensively researched worldwide. In Brazil, there is a variety of feedstock production that can be turned into soil amendments of high performance through biochar conversion, especially solid wastes. However, advances in biochar research in Brazil have not been systematically evaluated to indicate possible gaps and suggest future research for eco-friendly applications. Thus, in this work we evaluated biochar properties and effects on air, water, and soil quality based on data gathered from researches performed in Brazil. Biochar has been mainly evaluated as soil conditioner (37%), material characterization (17%), water treatment (12%), and greenhouse gases emissions (9%). Based on the data synthesis of 68 feedstocks used for biochar production, we observed that the pyrolysis temperature profoundly affects biochar properties. Meta-analysis indicated benefits of biochar addition to soils for chemical, physical, microbiological and biochemical attributes that have resulted in increases in root growth (+30%), and plant shoots (+45%). Pyrolysis temperature and feedstock are key choices to design biochar properties aiming to retain dyes, aromatic hydrocarbon, pesticides, and metals in water and wastewater treatment. It was also observed an increase in CO 2 and a decrease in N 2 O emissions after biochar application to soils in short-term experiments. Although there is a growing interest in the development of electrochemical sensors and biochar-based fertilizers, technological applications of biochar are still incipient in Brazil. Future research should prioritize long-term and mechanistically evaluations of biochar under field conditions and the development of eco-friendly technological applications.

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Adsorption of aromatic compounds by biochar: influence of the type of tropical biomass precursor

Cited by 31 publications

References 27 publications

Application of Biochar Derived From Pyrolysis of Waste Fiberboard on Tetracycline Adsorption in Aqueous Solution

Application of Biochar Derived From Pyrolysis of Waste Fiberboard on Tetracycline Adsorption in Aqueous Solution

Effect of biochar structure on the selective adsorption of heavy components in bio‐oil

A data synthesis on the biochar properties and implications for air, soil, and water quality in Brazil

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