Facile Synthesis of Calcite-Impregnated Hydrochar with High Sorption Capacity for Cu(II) from Aqueous Solution

Chen, Xiaoqin; Li, Bing; Shen, Yang; Guo, Jian-Zhong

doi:10.1021/acsomega.9b01805

Cited by 15 publications

(5 citation statements)

References 54 publications

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“…CaCO 3 dissolved in solution combines with copper ions to produce a precipitate as a new component. e formation of posnjakite is similar to the phenomenon reported by Zhang et al [38] and Chen et al [48].…”

Section: Xrd Analysissupporting

confidence: 89%

Snail Shells Adsorbent for Copper Removal from Aqueous Solutions and the Production of Valuable Compounds

Ouafi

Asri

Omor

et al. 2021

Journal of Chemistry

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This research explored the efficiency of snail shells powder (SSP) for Cu(II) removal from aqueous solutions and the production of valuable compounds from the residual product. To confirm its chemical and mineral components, the material was characterized by different instrumental techniques. The effects of experimental parameters such as the pH of the solution, the effect of SSP dose, particle size, and initial concentration of Cu(II) on the removal process were studied. The removal of Cu(II) was reasonably fast to be completed within a time frame of 90 min. The kinetics following the pseudo-second-order model (R2 = 0.979) were better compared to the pseudo-first-order model (R2 = 0.896). The increase in pH values leads to an increase in the amount of Cu(II) adsorbed. Afterward, the adsorption capacity reaches stability at pH near 7. The maximum Cu(II) removal occurred with a mass of 8 g·L−1 and a particle size of 300 μm. This particle size presents approximately 44.5% of SSP particles, which is the largest proportion of the sample as shown by particle size analysis. The adsorption isotherm was well described by Langmuir and Freundlich equations. The thermodynamic parameters values showed that the Cu(II) adsorption was a spontaneous and exothermic process. Furthermore, with the presence of CaCO3, the precipitation of Cu(II) in the form of posnjakite occurred with a high Cu(II) removal rate close to 99%. The residual SSP was used for the production of valuable compounds through the thermal decomposition process at various temperatures.

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Section: Xrd Analysissupporting

confidence: 89%

Snail Shells Adsorbent for Copper Removal from Aqueous Solutions and the Production of Valuable Compounds

Ouafi

Asri

Omor

et al. 2021

Journal of Chemistry

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“…The thermodynamic parameters (Δ G , Δ H , and Δ S ) of MB adsorbed onto DT-POP were determined from the isotherms data by eqs and , …”

Section: Resultsmentioning

confidence: 99%

Porous Organic Polymer Synthesized by Green Diazo-Coupling Reaction for Adsorptive Removal of Methylene Blue

Shen

2021

ACS Omega

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A porous organic polymer (marked as DT-POP), which contains abundant free phenolic hydroxyl groups, is synthesized by the well-known green azo-coupling reaction in water, characterized, and utilized as an effective adsorbent for the elimination of methylene blue (MB) from water solutions. The presence of permanent mesopores, abundant active functional groups, and π-electron enrichment ascribed to phenyl rings make DT-POP an efficient adsorbent for MB due to strong hydrogen bonding, π−π, and electrostatic interactions with the cationic dye MB. DT-POP with high stability and high adsorption capacity can be reused many times and thus shows high applicability in pollutant disposal.

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“…These parameters include free energy change (ΔG°), entropy change (ΔS°), and enthalpy change (ΔH°). 73,74 T, R, and k 0 refer to the adsorption temperature (K), gas constant (8.314 J mol −1 K −1 ), and thermodynamic equilibrium constant, respectively. The values of k 0 can be acquired by plotting ln(Q e /C e ) versus Q e and by extrapolating Q e to zero.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Synthesis of Cost-Effective Pomelo Peel Dimethoxydiphenylsilane-Derived Materials for Pyrene Adsorption: From Surface Properties to Adsorption Mechanisms

et al. 2020

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This study investigated the adsorption behaviors of pyrene (PYR) on a pomelo peel adsorbent (PPA), biochar (PPB), and H3PO4-modified (HPP), NaOH-activated (NPP), and dimethoxydiphenylsilane-treated (DPDMS-NPP) pomelo peel materials. SEM, FTIR, and elemental analyses of DPDMS-NPP’s surface structure showed that the material was characterized by a well-developed porous structure, a large specific surface area (698.52 m2 g–1), and an abundance of phenyl functional groups. These properties enhance the PYR adsorption performance of DPDMS-NPP. Experimental results indicated that the adsorption capacity of DPDMS-NPP was significantly affected by the amount of material used and the initial concentration of PYR. Kinetic assessments suggested that PYR adsorption on PPA, NPP, and DPDMS-NPP could be accurately described by the pseudo second-order model. The adsorption process was controlled by several mechanisms, including electron donor–acceptor (EDA), electrostatic, and π–π interactions as well as film and intraparticle diffusion. The adsorption isotherm studies showed that PYR adsorption on DPDMS-NPP and PPA was well described by the Langmuir model and the maximum Langmuir adsorption capacity of DPDMS-NPP was 531.9 μg g–1. Overall, the results presented herein suggested that the use of DPDMS-NPP adsorbents constitutes an economic and environmentally friendly approach for the mitigation of PYR contamination risks.

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Facile Synthesis of Calcite-Impregnated Hydrochar with High Sorption Capacity for Cu(II) from Aqueous Solution

Cited by 15 publications

References 54 publications

Snail Shells Adsorbent for Copper Removal from Aqueous Solutions and the Production of Valuable Compounds

Snail Shells Adsorbent for Copper Removal from Aqueous Solutions and the Production of Valuable Compounds

Porous Organic Polymer Synthesized by Green Diazo-Coupling Reaction for Adsorptive Removal of Methylene Blue

Synthesis of Cost-Effective Pomelo Peel Dimethoxydiphenylsilane-Derived Materials for Pyrene Adsorption: From Surface Properties to Adsorption Mechanisms

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