A comparison of biochars from lignin, cellulose and wood as the sorbent to an aromatic pollutant

Li, Jianfa; Li, Yimin; Wu, Yunlu; Zheng, Mei

doi:10.1016/j.jhazmat.2014.08.033

Cited by 148 publications

(53 citation statements)

References 33 publications

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“…Granular activated carbon and chars typically exhibit a heterogeneous pore structure, in which micropores, mesopores and macropores are present [26,27]. Particularly, the micropore surface areas in granular activated carbon and chars contributed approximately 60% and 80% of total surface areas [26,27], which provided predominant adsorptive sites with higher adsorption energies to adsorb organic contaminants [28]. Unfortunately, a large volume of micropores could increase the resistance to diffusion, leading to a considerably longer time to reach adsorption equilibrium.…”

Section: Comparisons Of Nitrobenzene Adsorptionmentioning

confidence: 99%

“…On the other hand, smaller adsorbent particle size could improve adsorption rate due to shorter travel distance for intraparticle radial diffusion and larger specific surface area [30]. However, some researchers have found that when granular activated carbon is ground to mm-sized particles, it still requires quite a longer time to reach adsorption equilibrium for nitrobenzene adsorption (more than 48 h) [26,31]. Therefore, the quite short equilibrium time (less than 1 min) for CH 3 -MCM-41 might be mainly explained by a narrow mesoproes distribution (Fig.…”

Section: Comparisons Of Nitrobenzene Adsorptionmentioning

confidence: 99%

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Enhanced nitrobenzene adsorption in aqueous solution by surface silylated MCM-41

Qin

2016

Microporous and Mesoporous Materials

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Section: Comparisons Of Nitrobenzene Adsorptionmentioning

confidence: 99%

Section: Comparisons Of Nitrobenzene Adsorptionmentioning

confidence: 99%

Enhanced nitrobenzene adsorption in aqueous solution by surface silylated MCM-41

Qin

2016

Microporous and Mesoporous Materials

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“…It was reported that nitrobenzene could damage DNA molecules . It is therefore important to adsorb nitrobenzene in gas and liquid systems . In this work, single‐handed helical polybissilsesquioxane bundles with biphenylene rings were prepared using a self‐templating approach.…”

mentioning

confidence: 99%

“…29 It is therefore important to adsorb nitrobenzene in gas and liquid systems. 30 In this work, single-handed helical polybissilsesquioxane bundles with biphenylene rings were prepared using a self-templating approach. Circular dichroism (CD) analysis disclosed that the chirality was successfully transferred to the twist of the biphenylene rings.…”

mentioning

confidence: 99%

Helical Polybissilsesquioxane Bundles Prepared Using a Self‐Templating Approach

Wang

Qin

et al. 2015

Chirality

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Polybissilsesquioxanes with single-handed helical morphologies attracted much attention during the last decade, which could be applied as asymmetric catalysts and chiral stationary phases. Herein, a pair of chiral biphenylene-bridged bissilsesquioxanes were synthesized. They self-assembled into helical bundles in ethanol, behavior that was confirmed in field emission scanning electron microscopy images. Circular dichroism analysis indicated that the biphenylene groups twisted in a single-handed fashion. Single-handed helical polybissilsesquioxane bundles were prepared via polycondensation of the bissilsesquioxanes, using a self-templating approach. Because of the shrinkage that occurred during polycondensation, the helical pitches of the bundles were shorter than those of their corresponding organic self-assemblies. The wide-angle X-ray diffraction pattern indicated that there were no π-π interactions among the diphenylene groups. The circular dichroism spectra indicated that the chirality was successfully transferred from the bissilsesquioxane self-assemblies to the polybissilsesquioxane. The polybissilsesquioxanes displayed a capacity for the adsorption of nitrobenzene and had potential application for enantioseparation.

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“…A high lignin content combined with high temperatures leads to high specific surface areas . Therefore, due to the low lignin content of oat hull (8%), it was expected that the biochar would have a low specific surface area compared to other raw materials that underwent similar pyrolysis conditions, such as the biochar obtained by Li et al (2014) from pyrolyzed lignin, cellulose, and wood. However, the obtainable by-products from oat hull residue were very low or null, therefore, the biochar from oat hull is of great interest in order to obtain a cost effective sorbent for heavy metal removal from contaminated water and soils.…”

Section: Effect Of Pyrolysis Process Conditions On the Specific Surfamentioning

confidence: 99%

Effects of Pyrolysis Conditions on Physicochemical Properties of Oat Hull Derived Biochar

González¹,

Romero-Hermoso²,

González³

et al. 2017

BioResources

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The effects of the pyrolysis conditions in terms of temperature (400 to 600 °C), residence time (0.5 to 3.5 h), nitrogen flux (0 to 1 L/min), and temperature increase rate (1.5 to 3 °C/min) on the physicochemical properties of biochar were studied. The physicochemical properties evaluated in the biochar were specific surface area, pore volume, average pore size, total carbon content, pH, total acidity, elemental composition, and polycyclic aromatic hydrocarbons (PAHs) content. A higher specific surface area of 108.28 m 2 /g and a mean pore size diameter of about 2.24 nm were found when the pyrolysis was conducted at 600 °C. In general, the pH and total acidity increased with the increased pyrolysis temperature. The total PAH concentration in all of the combinations studied varied from 0.16 to 8.73 μg/kg, and only phenanthrene, pyrene, and chrysene were detected. The increased temperature seemed to decrease the PAH concentration in the biochar. Nevertheless, there was no correlation found between the PAH content and the combined evaluated parameters.

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A comparison of biochars from lignin, cellulose and wood as the sorbent to an aromatic pollutant

Cited by 148 publications

References 33 publications

Enhanced nitrobenzene adsorption in aqueous solution by surface silylated MCM-41

Enhanced nitrobenzene adsorption in aqueous solution by surface silylated MCM-41

Helical Polybissilsesquioxane Bundles Prepared Using a Self‐Templating Approach

Effects of Pyrolysis Conditions on Physicochemical Properties of Oat Hull Derived Biochar

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