Humulus scandens-Derived Biochars for the Effective Removal of Heavy Metal Ions: Isotherm/Kinetic Study, Column Adsorption and Mechanism Investigation

Bai, Xingang; Xing, Luyang; Liu, Ning; Ma, Nana; Huang, Kexin; Wu, Dapeng; Yin, Mengmeng; Jiang, Kai

doi:10.3390/nano11123255

Cited by 16 publications

(8 citation statements)

References 48 publications

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“…They could be presented by Equations () and (), respectively. [ 32,33 ]

\frac{C_{e}}{q_{e}} goodbreak= \frac{1}{q_{\max} K_{L}} goodbreak+ \frac{C_{e}}{q_{\max}}

\ln q_{e} goodbreak= \ln K_{F} goodbreak+ \frac{1}{n} \ln C_{e}

where q max (mg/g) is the maximum adsorption capacity of Cu(II); K L (L/mg) is the Langmuir constant; K F (mg 1−1/ n ·L −1/ n ·g −1 ) is the Freundlich constants and n is Freundlich index.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Cu(II) in aqueous solution by sodium dodecyl benzene sulfonate‐modified montmorillonite

Wang

Peng

et al. 2023

J Chinese Chemical Soc

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The pristine montmorillonite (P-Mt) was modified with sodium dodecyl benzene sulfonate (SDBS) to form SDBS montmorillonite (SDBS-Mt) for the purpose of enhancing the removal performance of Cu(II) from aqueous solution. The materials were characterized by means of XRD, SEM-EDS, BET, and FTIR to analyze the surface morphology and structure. SDBS-Mt displayed a higher adsorption capacity than P-Mt. The adsorption kinetic model and the adsorption isotherm model are depicted by the pseudo-second-order kinetic equation and the Langmuir equation, respectively. The adsorption of Cu(II) on SDBS-Mt is a spontaneous and endothermic process. The order of influence of coexisting cations on the adsorption of Cu(II) is Ni(II) > Co(II) > Zn(II). In addition, the adsorbent has great regeneration performance after five cycles of regeneration. The main mechanisms of Cu(II) adsorption by SDBS-Mt may include electrostatic attraction, ion exchange, and complexation of sulfonate groups. In brief, SDBS-Mt may be a promising, simple, and low-cost adsorbent for the treatment of Cu(II) in aqueoussolutions.

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“…They could be presented by Equations () and (), respectively. [ 32,33 ]

\frac{C_{e}}{q_{e}} goodbreak= \frac{1}{q_{\max} K_{L}} goodbreak+ \frac{C_{e}}{q_{\max}}

\ln q_{e} goodbreak= \ln K_{F} goodbreak+ \frac{1}{n} \ln C_{e}

Section: Resultsmentioning

confidence: 99%

Adsorption of Cu(II) in aqueous solution by sodium dodecyl benzene sulfonate‐modified montmorillonite

Wang

Peng

et al. 2023

J Chinese Chemical Soc

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“…In addition, several sharp peaks belonging to the insolvable mineral products could be also detected; this indicates that the mineral contents in EP could be converted into insoluble ceramics during the high temperature treatment. As shown in Figure 2 a, the FTIR peak centered at ~1049 cm −1 can be ascribed to the COOH or CHO bending vibration, whereas the characteristic peak centered at ~1622 cm −1 occurs due to the C=O stretching vibration [ 33 , 34 ]. The peak intensities of EBC-K correspond with these oxygen content function groups, and they are slightly increased compared with EBC-Na, thus indicating that the population in the surface function group is greatly enhanced.…”

Section: Resultsmentioning

confidence: 99%

“…The molten salt method is an effective strategy that yields carbon materials by adopting a low melting point inorganic salt as the protecting medium instead of commonly used inert atmospheres; this means that it is a low cost and energy saving method that prepares carbon materials for different applications [ 25 , 26 , 27 , 28 , 29 , 30 ]. Based on previous studies, the etching effect of molten salt and the oxygen enriched reaction medium could effectively introduce a hierarchical porous structure as well as rich surface defects, which are favorable for persulfate activation [ 31 , 32 , 33 , 34 ]; however, to the best of our knowledge, few studies have devoted themselves to the preparation of bio-carbons, based on the molten salt method, in order to obtain AOPs and study its economic feasibility by systematic tech-economic analysis.…”

Section: Introductionmentioning

confidence: 99%

N, S Co-Doped Carbons Derived from Enteromorpha prolifera by a Molten Salt Approach: Antibiotics Removal Performance and Techno-Economic Analysis

et al. 2022

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N, S co-doped bio-carbons with a hierarchical porous structure and high surface area were prepared using a molten salt method and by adopting Entermorpha prolifera (EP) as a precursor. The structure and composition of the bio-carbons could be manipulated by the salt types adopted in the molten salt assisted pyrolysis. When the carbons were used as an activating agent for peroxydisulfate (PDS) in SMX degradation in the advanced oxidation process (AOP), the removal performance in the case of KCl derived bio-carbon (EPB-K) was significantly enhanced compared with that derived from NaCl (EPB-Na). In addition, the optimized EPB-K also demonstrated a high removal rate of 99.6% in the system that used local running water in the background, which proved its excellent application potential in real water treatment. The degradation mechanism study indicated that the N, S doping sites could enhance the surface affinity with the PDS, which could then facilitate 1O2 generation and the oxidation of the SMX. Moreover, a detailed techno-economic assessment suggested that the price of the salt reaction medium was of great significance as it influenced the cost of the bio-carbons. In addition, although the cost of EPB-K was higher (USD 2.34 kg−1) compared with that of EPB-Na (USD 1.72 kg−1), it was still economically competitive with the commercial active carbons for AOP water treatment.

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“…Râpă et al [72] equally found in their biosorption of Cu(II) ions to alginate/clay hybrid composite beads study that the PSO model best described the biosorption process [72]. While in the studies of Bai et al [80], Hu et al [82], and Khan et al [81] where Humulus scandens-derived biochar, biochar derived from Chaenomeles sinensis seed, and muskmelon peel biochar were utilized for the biosorption of Cu(II) ions, it was noticed that the biosorption processes were best close-fitting to the experimental data using the PSO model [86][87][88][89][90][91][92][93]. While in the studies of Sachan and Das [86] and Rahim et al [87] where the biosorption of Cu(II) ions to biochar obtained from plant biomass Saccarum ravvanne and decorated with manganese dioxide and desiccated coconut waste (DCW) effectiveness was assessed, it was noticed that the biosorption process followed the PSO model.…”

Section: Biosorption Kineticsmentioning

confidence: 97%

Copper(II) ion removal by chemically and physically modified sawdust biochar

Eleryan

Aigbe

Ukhurebor

et al. 2022

Biomass Conv. Bioref.

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The difference between physical activations (by sonications) and chemical activations (by ammonia) on sawdust biochar has been investigated in this study by comparing the removal of Cu(II) ions from an aqueous medium by adsorption on sawdust biochar (SD), sonicated sawdust biochar (SSD), and ammonia-modified sawdust biochar (SDA) with stirring at room temperature, pH value of 5.5–6.0, and 200 rpm. The biochar was prepared by the dehydrations of wood sawdust by reflux with sulfuric acid, and the biochar formed has been activated physically by sonications and chemically by ammonia solutions and then characterized by the Fourier transform infrared (FTIR); Brunauer, Emmett, and Teller (BET); scanning electron microscope (SEM); thermal gravimetric analysis (TGA); and energy-dispersive spectroscopy (EDX) analyses. The removal of Cu(II) ions involves 100 mL of sample volume and initial Cu(II) ion concentrations (conc) 50, 75, 100, 125, 150, 175, and 200 mg L−1 and the biochar doses of 100, 150, 200, 250, and 300 mg. The maximum removal percentage of Cu(II) ions was 95.56, 96.67, and 98.33% for SD, SSD, and SDA biochars, respectively, for 50 mg L−1 Cu(II) ion initial conc and 1.0 g L−1 adsorbent dose. The correlation coefficient (R2) was used to confirm the data obtained from the isotherm models. The Langmuir isotherm model was best fitted to the experimental data of SD, SSD, and SDA. The maximum adsorption capacities (Qm) of SD, SSD, and SDA are 91.74, 112.36, and 133.33 mg g−1, respectively. The degree of fitting using the non-linear isotherm models was in the sequence of Langmuir (LNR) (ideal fit) > Freundlich (FRH) > Temkin (SD and SSD) and FRH (ideal fit) > LNR > Temkin (SDA). LNR and FRH ideally described the biosorption of Cu(II) ions to SD and SSD and SDA owing to the low values of χ2 and R2 obtained using the non-linear isotherm models. The adsorption rate was well-ordered by the pseudo-second-order (PSO) rate models. Finally, chemically modified biochar with ammonia solutions (SDA) enhances the Cu(II) ions’ adsorption efficiency more than physical activations by sonications (SSD). Response surface methodology (RSM) optimization analysis was studied for the removal of Cu(II) ions using SD, SSD, and SDA biochars.

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Humulus scandens-Derived Biochars for the Effective Removal of Heavy Metal Ions: Isotherm/Kinetic Study, Column Adsorption and Mechanism Investigation

Cited by 16 publications

References 48 publications

Adsorption of Cu(II) in aqueous solution by sodium dodecyl benzene sulfonate‐modified montmorillonite

Adsorption of Cu(II) in aqueous solution by sodium dodecyl benzene sulfonate‐modified montmorillonite

N, S Co-Doped Carbons Derived from Enteromorpha prolifera by a Molten Salt Approach: Antibiotics Removal Performance and Techno-Economic Analysis

Copper(II) ion removal by chemically and physically modified sawdust biochar

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