The role of the oxygen functional groups in adsorption of copper (II) on carbon surface

Hotová, Gabriela; Slovák, Václav; Zelenka, Tomáš; Mars̆álek, Roman; Parchaňská, Alžběta

doi:10.1016/j.scitotenv.2019.135436

Cited by 46 publications

(14 citation statements)

References 29 publications

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“…In summary, our results showed that the surfaces of natural particles contained more O and N ligands than those of pristine and aged MPs, and the oxygen-containing groups play a dominant role in Cu adsorption. Indeed, oxygen atoms on the particles can donate a lone pair of electrons to the metal ion to bind it to the surface . Complexation with oxygen groups, especially carboxylic groups, could be critical for Cu binding to the particles .…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, oxygen atoms on the particles can donate a lone pair of electrons to the metal ion to bind it to the surface. 55 Complexation with oxygen groups, especially carboxylic groups, could be critical for Cu binding to the particles. 56 Therefore, the higher O content in natural particles mostly explains their stronger Cu-binding affinity than the MPs.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Copper Adsorption to Microplastics and Natural Particles in Seawater: A Comparison of Kinetics, Isotherms, and Bioavailability

Chen

Zhu

et al. 2021

Environ. Sci. Technol.

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The growing use of plastics has led to microplastics (MPs) being ubiquitously distributed in marine environments. Although previous studies have emphasized MPs as important metal-transport vectors, few have considered the differences between these anthropogenic particles and their coexisting natural counterparts in sequestering metals in seawater. Here, we compared Cu adsorption to pristine and naturally aged MPs (polystyrene and polyethylene) with that to algae particles and sediments and assessed the bioavailability of the adsorbed Cu by a gut juice extraction assay. Adsorption kinetics and isotherms consistently showed that natural particles bound far more Cu to their surfaces than MPs. The rougher surfaces, greater specific surface areas, and lower ζ-potentials of natural particles contributed to their stronger Cu adsorption capacity than pristine or aged MPs. Natural particles also contained more diverse functional groups for binding Cu, with oxygen-containing groups playing a dominant role. Adsorbed Cu on natural particles was less extractable by sipunculan gut juice than that on MPs, indicating their higher Cu affinity. Overall, our study suggests that natural particles outcompete MPs in carrying metals in the water column and transferring them to marine organisms in today’s environmental context. This work provides new insights for assessing the risks of MPs in marine environments.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Copper Adsorption to Microplastics and Natural Particles in Seawater: A Comparison of Kinetics, Isotherms, and Bioavailability

Chen

Zhu

et al. 2021

Environ. Sci. Technol.

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“…Metal ions are essential for plant growth and often catalyze the oxidation reactions in the biomass. With the addition of an inhibitor, which reacts with a metal ion to form a precipitate, the catalytic reaction can be effectively prevented and the spontaneous combustion process is slowed . The metal ion content in the untreated samples was measured via the XRF technique at different temperatures.…”

Section: Results and Discussionmentioning

confidence: 99%

Laboratory Investigation on the Spontaneous Combustion of a Lignocellulosic Biomass and Its Suppression by Chemical Inhibitors

Tang

Jinqiang

2020

Energy Fuels

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To understand the risk factors of spontaneous combustion fire during the storage process of a biomass pile, the effects of various factors on its self-ignition process under adiabatic oxidation conditions were investigated. Thermogravimetry, differential scanning calorimetry, and Fourier transform infrared spectroscopy (FTIR) were used to analyze the behavior of a series of biomass samples before and after the inhibition. A total of 12 typical inorganic salts and antioxidants were used as chemical inhibitors for suppressing the spontaneous combustion of the lignocellulosic biomass. A steady increase in the heating rate of the compound can be observed with a decrease in the particle size from 4.00 to 0.18 mm. Samples with a moisture content of 1% are most susceptible to spontaneous combustion. Interestingly, the effect of the ventilation rate on the self-heating properties of the samples increases when the temperature is higher than 70 °C. In the 40–350 °C range, CaCl2, citric acid, MgCl2, and Na3PO4 reduce the heat release by 123.32–492.15 J/g. Among these compounds, CaCl2 exhibits the optimal inhibition effect. According to the FTIR results, the inhibitors mainly target the −OH, C–O, C–H, and CO groups. Moreover, the weakening of these active sites by slowing their oxidation rate is the main responsible for retarding the spontaneous combustion of the biomass. This work contributes in the development of novel strategies to shed some light on the spontaneous combustion of biomasses.

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“…6b, FTIR spectra of compost before and after the EK operations were compared with those in biochar RFM. The FTIR spectrum of both RFMs displayed the band centered at approximately 1630 cm -1 , which can be ascribed to the C=O stretching, mainly in the carboxyl groups [53]. A strong band at 1030 cm -1 which was observed only in the spectrum of compost RFM could be related to the C-O-C bond in polysaccharides; however, the peak increased after EK treatment, which can be attributed to copper absorption.…”

Section: Characterization Of Compost Rfmmentioning

confidence: 90%

Enhanced copper removal from contaminated kaolinite soil by electrokinetic process using compost reactive filter media

Ghobadi

Altaee

Zhou

et al. 2021

Journal of Hazardous Materials

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The role of the oxygen functional groups in adsorption of copper (II) on carbon surface

Cited by 46 publications

References 29 publications

Copper Adsorption to Microplastics and Natural Particles in Seawater: A Comparison of Kinetics, Isotherms, and Bioavailability

Copper Adsorption to Microplastics and Natural Particles in Seawater: A Comparison of Kinetics, Isotherms, and Bioavailability

Laboratory Investigation on the Spontaneous Combustion of a Lignocellulosic Biomass and Its Suppression by Chemical Inhibitors

Enhanced copper removal from contaminated kaolinite soil by electrokinetic process using compost reactive filter media

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