Treatment of microcystin-LR cyanotoxin contaminated water using Kentucky bluegrass-derived biochar

Song, Hak Jin; Gurav, Ranjit; Bhatia, Shashi Kant; Lee, Eun Bin; Kim, Hyung Joo; Yang, Yung‐Hun; Kan, Eunsung; Kim, Ho; Lee, Sang Hyun; Choi, Yong‐Keun

doi:10.1016/j.jwpe.2021.102054

Cited by 26 publications

(26 citation statements)

References 28 publications

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“…This shows that the reaction mechanism is a chemisorption process with a rate constant of 0.119 g·mg –1 ·min –1 and that the pseudo-second-order kinetic model can better explain the adsorption of TC by CS-modified bentonite. The Elovich model’s correlation coefficient was 0.999, and its high fitting degree shows that the reaction process is a nonhomogeneous diffusion process Figure d shows that the intraparticle diffusion model’s fitted curve does not pass through the origin and that the fitted correlation coefficient is only 0.624, demonstrating that intraparticle diffusion is not the only rate-limiting step in the adsorption process and that a variety of factors interact to control the rate of the process …”

Section: Resultsmentioning

confidence: 99%

“…The Elovich model's correlation coefficient was 0.999, and its high fitting degree shows that the reaction process is a nonhomogeneous diffusion process. 42 Figure 9d shows that the intraparticle diffusion model's fitted curve does not pass through the origin and that the fitted correlation coefficient is only 0.624, demonstrating that intraparticle diffusion is not the only rate-limiting step in the adsorption process and that a variety of factors interact to control the rate of the process. 43 2.3.2.…”

Section: Adsorption Isotherms and Kinetics 231 Adsorption Kineticsmentioning

confidence: 99%

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Preparation of Chitosan-Modified Bentonite and Its Adsorption Performance on Tetracycline

Guo

Wang

et al. 2023

ACS Omega

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In this study, chitosan-modified bentonite was synthesized using the coprecipitation method. When the Na 2 CO 3 content was 4% (weight of soil) and the mass ratio of chitosan to bentonite was 1:5, the adsorption performance of the chitosan/bentonite composite was best. The adsorbent was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and Brunauer−Emmett− Teller measurement. Various characterization results demonstrate that chitosan successfully entered the bentonite interlayer and increased layer spacing but did not modify bentonite's laminar mesoporous structure, and the −CH 3 and −CH 2 groups of chitosan appeared on chitosan-modified bentonite. Tetracycline was used as the target pollutant in the static adsorption experiment. The adsorption capacity was 19.32 mg/g under optimal conditions. The adsorption process was more consistent with the Freundlich model and the pseudo-second-order kinetic model, indicating that it was a nonmonolayer chemisorption process. The adsorption process is a spontaneous, endothermic, entropy-increasing process, according to thermodynamic characteristics.

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Section: Resultsmentioning

confidence: 99%

Section: Adsorption Isotherms and Kinetics 231 Adsorption Kineticsmentioning

confidence: 99%

Preparation of Chitosan-Modified Bentonite and Its Adsorption Performance on Tetracycline

Guo

Wang

et al. 2023

ACS Omega

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“…This result implies that the highly crystalline phase of HAP may be successfully embedded on the surface of IBC (Jung et al, 2019). Considering to a possible complexation between some cations (e.g., Ca 2+ , Mg 2+ , and Fe 3+ ) and organic pollutants (Choi et al, 2020; Gurav, Bhatia, Choi, et al, 2021; Song et al, 2021), it is speculated that CaCO 3 , Ca 10 (PO 4 ) 6 (OH) 2 , CaNaPO 4 may influence kaempf adsorption on IBC or HAP/IBC. Moreover, FTIR spectra of IBC before adsorption contained broad peaks at 3450, 1630, 1400, and 1123 cm −1 , which were attributed to the stretching vibrations of the OH, aromatic conjugated CO/CC, anti‐symmetric COO, and CO bonds, respectively (Kim et al, 2013; Tong et al, 2011; Xu et al, 2008) (Figure 2a).…”

Section: Resultsmentioning

confidence: 99%

“…Data are means and standard error. (Song et al, 2021). To further explore the diffusion mechanism, three models were adopted to make the adsorption plots (Figure 5c-h).…”

Section: Kinetics Studies For Ibc and Hap/ibcmentioning

confidence: 99%

The potential for synthesized invasive plant biochar with hydroxyapatite to mitigate allelopathy of Solidagocanadensis

Huang

Yuan

et al. 2023

Ecological Applications

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Few studies tried to explore the mitigation effect and underlying mechanisms of biochar and their complex for negative allelopathy from invasive plants, which may provide a new way in the invasive plant management. Herein, an invasive plant (Solidago canadensis)‐derived biochar (IBC) and its composite with hydroxyapatite (HAP/IBC) were synthesized by high temperature pyrolysis, and characterized by scanning electron microscopy, energy dispersion spectrometer, X‐ray diffraction, Fourier transform infrared spectroscopy, and X‐ray photoelectron spectroscopy. Then, both the batch adsorption and pot experiments were conducted to compare the removal effects of kaempferol‐3‐O‐β‐D‐glucoside (C21H20O11, kaempf), an allelochemical from S. canadensis, on IBC and HAP/IBC, respectively. HAP/IBC showed a stronger affinity for kaempf than IBC due to its higher specific surface area, more functional groups (P‐O, P‐O‐P, PO43−), stronger crystallization [Ca3(PO4)2]. The maximum kaempf adsorption capacity on HAP/IBC was six times higher than on IBC (10.482 mg/g > 1.709 mg/g) via π–π interactions, functional groups, and metal complexation. The kaempf adsorption process could be fitted best by both pseudo‐second‐order kinetic and Langmuir isotherm models. Furthermore, HAP/IBC addition into soils could enhance and even recover the germination rate and/or seedling growth of tomato inhibited by negative allelopathy from the invasive S. canadensis. These results indicate that the composite of HAP/IBC could more effectively mitigate the allelopathy from S. canadensis than IBC, which may be a potential efficient approach to control the invasive plant and improve invaded soils.

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“…They can also induce toxic effects by dermal contact with contaminated recreational water. 6,7 Microcystins (MCs) are the largest and most widespread group within cyanotoxins. MCs are cyclic heptapeptides with the general formula cyclo-(D-Ala-l-X-D-MeAsp-l-Z-Adda-D-Glu-Mdha), where X and Z are variable amino acids, D-MeAsp represents D-erythro-b-methylaspartic acid, Adda stands for (2S, 3S, 8S, 9S)-3-amino-9 methoxy-2,6,8trimethyl-10-phenyldeca-4,6-dienoic acid, and Mdha corresponds to N-methyldehydroalanine.…”

Section: Introductionmentioning

confidence: 99%

Molecularly imprinted nanoparticle-based assay (MINA) for microcystin-LR detection in water

Almanza

Vera

Jiménez

et al. 2023

Analyst

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Treatment of microcystin-LR cyanotoxin contaminated water using Kentucky bluegrass-derived biochar

Cited by 26 publications

References 28 publications

Preparation of Chitosan-Modified Bentonite and Its Adsorption Performance on Tetracycline

Preparation of Chitosan-Modified Bentonite and Its Adsorption Performance on Tetracycline

The potential for synthesized invasive plant biochar with hydroxyapatite to mitigate allelopathy of Solidagocanadensis

Molecularly imprinted nanoparticle-based assay (MINA) for microcystin-LR detection in water

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