Sorption of N-acyl homoserine lactones on maize straw derived biochars: Characterization, kinetics and isotherm analysis

Sheng, Hongjie; Yin, Yulong; Xiang, Leilei; Wang, Ziquan; Harindintwali, Jean Damascene; Cheng, Jinjin; Ge, Jing; Zhang, Leigang; Jiang, Xin; Yu, Xiangyang; Wang, Fang

doi:10.1016/j.chemosphere.2022.134446

Cited by 20 publications

(3 citation statements)

References 49 publications

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“…SAA-normalized KF (KF-SAA) of WC200 was significantly greater than other biohcars (Table 2), indicating that polarity had a great contribution to its sorption. This result was comparable to the previous research that the sorption capacity per unit SSA of 300 °C biochar for N-acyl homoserine lactones was higher than that of 600 °C biochar (Sheng et al 2022). A previous study showed that some oxygen-containing groups on the biochar surfaces such as -COOH and -OH could become the main hydrogen-bonding sorption positions for ionic organic pollutants (Ni et al 2011).…”

Section: Dynamic Changes In Sorption Mechanismssupporting

confidence: 88%

Predicting the speciation of ionizable antibiotic ciprofloxacin by biochars with varying carbonization degrees

Shi¹,

Li²,

Liu³

et al. 2022

Preprint

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Sorption mechanisms of ionizable organic pollutants by biochars and approaches for the prediction of sorption are still unclear. In this study, batch experiments were conducted to explore the sorption mechanisms of woodchip-derived biochars prepared at 200–700 ˚C (referred as WC200-WC700) for cationic, zwitterionic and anionic species of ciprofloxacin (referred as CIP+, CIP± and CIP−, respectively). The results revealed that the sorption affinity of WC200 for different CIP species was in the order of CIP± > CIP+ > CIP−, while that of WC300-WC700 remained the order of CIP+ > CIP± > CIP−. WC200 exhibited a strong sorption ability, which could be attributed to hydrogen bonding and electrostatic attraction with CIP+, electrostatic attraction with CIP±, and charge-assisted hydrogen bonding with CIP−. Pore filling and π-π interactions contributed to the sorption of WC300-WC700 for CIP+, CIP± and CIP−. Rising temperature facilitated CIP sorption to WC400 as verified by site energy distribution analysis. Proposed models including the proportion of three CIP species and sorbent aromaticity index (H/C) can quantitatively predict CIP sorption to biochars with varying carbonization degrees. These findings are vital to elucidating the sorption behaviors of ionizable antibiotics to biochars and exploring potential sorbents for environmental remediation.

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Section: Dynamic Changes In Sorption Mechanismssupporting

confidence: 88%

Predicting the speciation of ionizable antibiotic ciprofloxacin by biochars with varying carbonization degrees

Shi¹,

Li²,

Liu³

et al. 2022

Preprint

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show abstract

“…The correlation coefficient R 2 of the Freundlich model was higher than that of the Langmuir model except for PKC-2 adsorption, indicating that the Freundlich model provides a better fit to the equilibrium data except for PKC-2 adsorption. The closer fit of the Freundlich model implies that the adsorption of OTC on biochars is mainly multi-layer adsorption [ 53 ]. In general, the factor 1/ n is used to predict the adsorption difficulty.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Biochar with Developed Mesoporous Structure from Poplar Leaf Activated by KHCO3 and Its Efficient Adsorption of Oxytetracycline Hydrochloride

et al. 2023

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The effective removal of oxytetracycline hydrochloride (OTC) from the water environment is of great importance. Adsorption as a simple, stable, and cost-effective technology is regarded as an important method for removing OTC. Herein, a low-cost biochar with a developed mesoporous structure was synthesized via pyrolysis of poplar leaf with potassium bicarbonate (KHCO3) as the activator. KHCO3 can endow biochar with abundant mesopores, but excessive KHCO3 cannot continuously promote the formation of mesoporous structures. In comparison with all of the prepared biochars, PKC-4 (biochar with a poplar leaf to KHCO3 mass ratio of 5:4) shows the highest adsorption performance for OTC as it has the largest surface area and richest mesoporous structure. The pseudo-second-order kinetic model and the Freundlich equilibrium model are more consistent with the experimental data, which implies that the adsorption process is multi-mechanism and multi-layered. In addition, the maximum adsorption capacities of biochar are slightly affected by pH changes, different metal ions, and different water matrices. Moreover, the biochar can be regenerated by pyrolysis, and its adsorption capacity only decreases by approximately 6% after four cycles. The adsorption of biochar for OTC is mainly controlled by pore filling, though electrostatic interactions, hydrogen bonding, and π-π interaction are also involved. This study realizes biomass waste recycling and highlights the potential of poplar leaf-based biochar for the adsorption of antibiotics.

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“…This result was comparable to the previous research that the sorption capacity per unit SSA of 300 °C biochar for N -acyl homoserine lactones was higher than that of 600 °C biochar. 42 A previous study showed that some oxygen-containing groups on the biochar surfaces such as –COOH and –OH could become the main hydrogen-bonding sorption positions for ionic organic pollutants. 43 Based on the elemental and FTIR analysis, WC200 had the highest H and O content and the –OH stretching vibration peak was the most intense.…”

Section: Resultsmentioning

confidence: 99%

Predicting the speciation of ionizable antibiotic ciprofloxacin by biochars with varying carbonization degrees

Shi

Liu

et al. 2023

RSC Adv.

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show abstract

Sorption of N-acyl homoserine lactones on maize straw derived biochars: Characterization, kinetics and isotherm analysis

Cited by 20 publications

References 49 publications

Predicting the speciation of ionizable antibiotic ciprofloxacin by biochars with varying carbonization degrees

Predicting the speciation of ionizable antibiotic ciprofloxacin by biochars with varying carbonization degrees

Preparation of Biochar with Developed Mesoporous Structure from Poplar Leaf Activated by KHCO3 and Its Efficient Adsorption of Oxytetracycline Hydrochloride

Predicting the speciation of ionizable antibiotic ciprofloxacin by biochars with varying carbonization degrees

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