The role of ash content on bisphenol A sorption to biochars derived from different agricultural wastes

Li, Jing; Ni, Liang; Jin, Xiuqi; Zhou, Dandan; Li, Hao; Wu, Min; Pan, Bo

doi:10.1016/j.chemosphere.2016.12.041

Cited by 96 publications

(37 citation statements)

References 24 publications

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“…Biochars of 900°C (PBC900 and DBC900) had the highest degree of graphitization (lowest I D /I G value) and the greatest SSA and developed micropore structure in carbonaceous fractions (Table , Supplemental and ), which enhanced the sorption of triclosan to carbonaceous fractions by π‐π interaction and pore filling effect (Ahmad et al., ). Meanwhile, all the K F values of DBCs were greater than those of PBCs (Supplemental a), which may be because ash (inorganic minerals) occupied some sorption sites on carbonaceous fractions of PBCs (Li et al., ; Sun et al., ; Zhang, Sun, Ren, Min, & Zhang, ), and deashing exposed the sorption sites that were initially occupied by ash.…”

Section: Resultsmentioning

confidence: 99%

“…The ash particles are smaller in size (Supplemental ) and thus greater in SSA than carbonaceous fractions of biochars. At the pyrolysis temperature of 300–800°C, the ash particles increased the SSAs of the whole biochars when attaching to the surface of carbonaceous fractions (Chen, Zhang, Zhang, Ghosh, & Pan, ; Li et al., ; Zhou et al., ). At the pyrolysis temperature of 900°C, however, massive ash particles with small size piled up on the surface of biochar and filled in its pore structure, which may block the pore structure of carbonaceous fractions (Li et al., ) and thus decrease the SSA of biochar.…”

Section: Resultsmentioning

confidence: 99%

“…Sorption of triclosan on PBCs depends on the combined role of carbonaceous fraction and ash, and sorption of triclosan on DBCs is mainly controlled by the single role of carbonaceous fraction. Supplemental displayed that the sorption isotherms of DBCs of 600–900°C were always higher than those of their corresponding PBCs, which was mainly because ash occupied the sorption sites on biochars and decreased the sorption of triclosan to PBCs (Li et al., ; Sun et al., ; Zhang et al., ). Meanwhile, the sorption isotherm for DBCs of 300°C was also higher than that for PBC300, which was possibly because the dominant sorption mechanisms for biochars of 300°C were partition effect and hydrogen bond (Kah et al., ).…”

Section: Resultsmentioning

confidence: 99%

“…Biochars are rich in carbonaceous fraction, but ash (inorganic fraction) is also an important component of biochars (Keiluweit, Nico, Johnson, & Kleber, ; Weber & Quicker, ; Zhao, Cao, Wang, Yang, & Xu, ). The ash particles in biochars occupy the sorption sites or block access to the interior pores, suppressing sorption of organic pollutants, such as diuron, p ‐nitrotoluene, m ‐dinitrobenzene, nitrobenzene, naphthalene, phenanthrene, and bisphenol A (Huang & Chen, ; Li et al., ; Sun et al., ; Yang & Sheng, ). Specially, when Sigmund et al.…”

Section: Introductionmentioning

confidence: 99%

“…Biochars are rich in carbonaceous fraction, but ash (inorganic fraction) is also an important component of biochars (Keiluweit, Nico, Johnson, & Kleber, 2010;Weber & Quicker, 2018;Zhao, Cao, Wang, Yang, & Xu, 2013). The ash particles in biochars occupy the sorption sites or block access to the interior pores, suppressing sorption of organic pollutants, such as diuron, p-nitrotoluene, m-dinitrobenzene, nitrobenzene, naphthalene, phenanthrene, and bisphenol A (Huang & Chen, 2010;Li et al, 2017;Sun et al, 2013;Yang & Sheng, 2003). Specially, when Sigmund et al (2016) comparatively studied the sorption of triclosan to biochars derived from ash-poor softwood shavings and ash-rich sewage sludge, the results showed that ash in biochars suppressed the sorption of triclosan, and the negative effect of ash on sorption was more likely due to an increase in solution pH.…”

Section: Introductionmentioning

confidence: 99%

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Differential roles of ash in sorption of triclosan to wood‐derived biochars produced at different temperatures

et al. 2020

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Biochar is composed of carbonaceous and inorganic (ash) fractions. The structural properties of carbonaceous fractions and the composition of ash in biochar are both variable with pyrolysis temperature. However, it is unknown whether ash may play different roles in sorption of organic compounds to the carbonaceous fraction of biochars produced at different temperatures. Hence, in this study, the pristine biochars produced at 300–900°C and their corresponding deashed biochars were investigated, and the combined roles of carbonaceous fraction and ash in sorption of triclosan were compared. The results showed that the biochars produced at 300–400°C had high content of uncarbonized organic structure with dominating partition effect. The combination of uncarbonized organic structure and ash had comparable or even higher sorption coefficient (KD) for triclosan at low concentration compared with a single uncarbonized organic structure. However, for the biochars produced at 600–900°C, which were mainly composed of carbonized or graphitized carbon structure, ash had significant effect on triclosan sorption by reducing surface adsorption and pore filling effect. The combination of carbonaceous fraction and ash decreased KD values for triclosan at any tested concentrations. In addition, the results of pH effect on sorption indicated that ash possibly decreased the electrostatic repulsion of deprotonated phenolic hydroxyl between biochars and triclosan. Accordingly, it will be more valuable to design biochars for pollutant sorption from the perspective of combined role of carbonaceous fraction and ash rather than a single role of carbonaceous fraction.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Differential roles of ash in sorption of triclosan to wood‐derived biochars produced at different temperatures

et al. 2020

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Difference in characteristics and nutrient retention between biochars produced in nitrogen‐flow and air‐limitation atmospheres

Zhang

Chen

et al. 2020

J of Env Quality

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The different effects of nitrogen-flow (NF) and air-limitation (AL) pyrolysis on the characteristics and nutrient retention of biochars (BCs) are unclear. Hence, in this study, BCs derived from bamboo, corn straw, and wheat straw were produced in AL and NF atmospheres at various temperatures (300-750 • C), and their different characteristics and nutrient retention rates were compared systematically. Nitrogen-flow pyrolysis facilitates C retention and graphitic C formation, and AL pyrolysis improves the polarity and supports the formation of oxygen-containing groups. With increasing pyrolysis temperature, C retention and graphitic C formation in BCs derived from AL pyrolysis decreases more significantly compared with BCs from NF pyrolysis. At 750 • C, the polarity and oxygen-containing groups of BCs derived from AL pyrolysis increase, whereas those from BCs derived from NF pyrolysis decrease. The observations are attributable to the AL and high-temperature-enhanced oxidization and gasification of C. An AL atmosphere with a higher pyrolysis temperature supports porosity and results in a larger specific surface area. Although pyrolysis temperature and atmosphere have negligible effects on nutrient retention, a low pyrolysis temperature facilitates the formation of water-soluble Ca, Mg, and P, and AL pyrolysis facilitates the formation of water-soluble P because the high pyrolysis temperature improves the pH and mineral stability of BCs, and air limitation facilitates the oxidation of organic P into PO 4 3−. This study provides a reference for selecting AL or NF pyrolysis based on various pyrolysis temperatures to produce BCs and applying these in C sequestration, contaminant sorption, and soil quantity improvement.

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Biomass-Based Engineered Materials for Soil Remediation

Das,

Newar,

Saikia

et al. 2023

Land Remediation and Management: Bioengineering Strategies

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The role of ash content on bisphenol A sorption to biochars derived from different agricultural wastes

Cited by 96 publications

References 24 publications

Differential roles of ash in sorption of triclosan to wood‐derived biochars produced at different temperatures

Differential roles of ash in sorption of triclosan to wood‐derived biochars produced at different temperatures

Difference in characteristics and nutrient retention between biochars produced in nitrogen‐flow and air‐limitation atmospheres

Biomass-Based Engineered Materials for Soil Remediation

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