Sorption of naphthalene and 1-naphthol by biochars of orange peels with different pyrolytic temperatures

Chen, Baoliang; Chen, Zaiming

doi:10.1016/j.chemosphere.2009.02.004

Cited by 578 publications

(272 citation statements)

References 23 publications

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“…[22] The higher surface areas for BCs produced at 700 °C may be related to the destruction of aliphatic alkyl and ester groups and exposure of the aromatic lignin core through higher pyrolysis temperatures. [27] The largest pore volume of 0.022 cm 3 g −1…”

Section: Biochar Characterizationmentioning

confidence: 99%

“…[23] In addition, the decrease in the O/C and (O + n)/C ratios with increase in pyrolysis temperature indicates the reduction of O containing polar functional groups on BC surface. [27] where K R is the constant (L mg −1 ), a R is empirical coefficient (mg ) values were calculated using Equation (9): where q ex and q m are the experimental and model calculated equilibrium capacity (mg g −1 ) respectively.…”

Section: Calculationsmentioning

confidence: 99%

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Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures

Mayakaduwa

Vithanage

Karunarathna

et al. 2016

Chemical Speciation & Bioavailability

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Biochars showed a potential as adsorbents for organic contaminants, however, have not been tested for carbofuran, which has been detected frequently in water. This study provides evidences for the use of infused tea residue derived biochar for carbofuran removal. Biochars were produced at 300, 500 and 700 °C by slow pyrolysis and were characterized by proximate and ultimate analysis, FT-IR, SEM, BET and pore size distribution. Pyrolysis temperature showed a pronounced effect on biochar properties. The maximum carbofuran removal was achieved at pH 5. Freundlich and Temkin models best fit the equilibrium data. Biochars produced at 700 °C showed the highest sorption intensity. The adsorption process was likely to be a favorable chemisorption process with electrostatic interactions between carbofuran molecules and biochar surface. Acid-base interactions, electrophilic addition reactions and amide bond formations are the possible mechanisms of carbofuran adsorption. Overall, biochars prepared from tea waste can be utilized as effective adsorbents for removal of aqueous carbofuran.

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Section: Biochar Characterizationmentioning

confidence: 99%

Section: Calculationsmentioning

confidence: 99%

Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures

Mayakaduwa

Vithanage

Karunarathna

et al. 2016

Chemical Speciation & Bioavailability

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“…However, a number of studies have questioned the inertness of biochar [14,15], suggesting its properties could change on oxidation [16,17]. Liang et al showed that biochar not only disappears gradually on exposure to soil but also its particles also alter chemically because of surface oxidation and interactions with other compounds [5,18,19].…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on surface chemistry of rice husk‐derived biochar

Huang

Zhou

et al. 2017

Env Prog and Sustain Energy

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Herein, we aimed to determine the physicochemical properties of biochar produced from rice husk at 350 and 5508C, to characterize changes in the biochar properties during aging and to identify the effect of aging time on these changes. To simulate different stages in the aging process, samples were incubated at a constant temperature in the dark and maintained at 60% water holding capacity for 100-300 d. The transformation and morphology of the biochar particles were monitored by diffuse-reflectance Fourier transform infrared spectroscopy (DRIFTS), scanning electron microscopy (SEM) coupled with energy X-ray dispersive spectroscopy, and X-ray photoelectron spectroscopy (XPS). During aging, a layer formed on the surface and the content of easily oxidized substances increased with increased aging time. In addition, SEM indicated that oxidation occurred close to the biochar surface rather than in the biochar particle interior. Furthermore, the DRIFTS and XPS results indicated that the biochar surface produced at 5508C underwent decarboxylation and hydroxylation, while for the 3508C biochar, the increase in surface oxygen content was associated with the presence of hydroxyl moieties.

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“…Sorptive characteristics can equally be affected by hydrophilic groups on biochar [91]. The adsorption of aromatic molecules, such as PAHs to wood chars is rapid and is assisted by -electron interactions and pore-filling mechanisms [96], multilayer adsorption, surface coverage, condensation in capillary pores, and adsorption into the polymetric matrix [106]. When a portion of a HOC is sorbed to the exterior surfaces of biochar and other portions are trapped within internal nanopores, it limits the mass transfer of the chemical to microorganisms [107] (Figure 2).…”

Section: Biochar Adsorption and Stabilitymentioning

confidence: 99%

Impact of Biochar on Organic Contaminants in Soil: A Tool for Mitigating Risk?

Ogbonnaya

Semple

2013

Agronomy

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Abstract:The presence of biochar in soils through natural processes (forest fires, bush burning) or through application to soil (agriculture, carbon storage, remediation, waste management) has received a significant amount of scientific and regulatory attention. Biochar alters soil properties, encourages microbial activity and enhances sorption of inorganic and organic compounds, but this strongly depends on the feedstock and production process of biochar. This review considers biochar sources, the production process and result of pyrolysis, interactions of biochar with soil, and associated biota. Furthermore, the paper focuses on the interactions between biochar and common anthropogenic organic contaminants, such as polycyclic aromatic hydrocarbons (PAHs), pesticides, and dioxins, which are often deposited in the soil environment. It then considers the feasibility of applying biochar in remediation technologies in addition to other perspective areas yet to be explored.

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Sorption of naphthalene and 1-naphthol by biochars of orange peels with different pyrolytic temperatures

Cited by 578 publications

References 23 publications

Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures

Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures

Effect of aging on surface chemistry of rice husk‐derived biochar

Impact of Biochar on Organic Contaminants in Soil: A Tool for Mitigating Risk?

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