Journal of the Taiwan Institute of Chemical Engineers
·
2016
·
IF 2.848
Zhanjing Guo,Xiongmin Liu,Hongmiao Huang,Lingfeng Jiang
The strong acidic cationic exchange fiber (SACEF) was used to adsorb yohimbine from alcoholic solution. Batch experiments were performed to examine the effects of adsorbent dosage, solution pH and temperature in the adsorption process. The thermodynamics and kinetics of adsorption were also analyzed. The optimum yohimbine adsorption onto the SACEF was found at pH = 5 of solution and equilibrium could be attained within 20 min. The equilibrium adsorption data were preferably modeled with the Freundlich isotherm model and the thermodynamic parameters were calculated to be: 11.99 kJ/mol < Δ H < 13.72 kJ/mol, −21.17 kJ/mol < Δ G < −17.87 kJ/mol and 63.18 J/mol K < Δ S < 65.60 J/mol K. The results demonstrated that the adsorption was an endothermic, spontaneous and feasible process of physisorption . Meanwhile, yohimbine adsorption on SACEF fitted well to the pseudo-second-order kinetic model and the adsorption rate was limited by film diffusion. The activation energy Ea was calculated to be 14.39 kJ/mol. Furthermore, the surface morphologies of the SACEF before and after yohimbine adsorption were analyzed by SEM and the adsorption mechanism was discussed by FTIR analysis. SACEF could effectively adsorb yohimbine from alcoholic solution and could be used repeatedly for more than five cycles.
研究领域:
药物化学
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药剂学
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物理化学
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分离科学
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吸附科学
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天然产物提取
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药物代谢
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DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2018
·Vol. 29
·期 2
·334-342
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IF 1.444
Tang Xiaosheng,Tang Ping,Liu Liangliang
In this study, tetraethylenepentamine modified magnetic graphene oxide nanomaterial (TMGO) was prepared and characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and vibration sample magnetometer (VSM). All the characterizations proved that the modification and preparation of TMGO were successful. The TMGO nanomaterial was used in the adsorption of Acid Red 18 (AR) in aqueous solution. The parameters like pH of solution, adsorption kinetics and isotherms were all investigated. The results indicated that the TMGO nanomaterial had satisfied adsorption ability and the maximum adsorption capacity was 524.2 mg g -1 at 45 °C and pH 6. The adsorption capacity remained at 91.8% of the initial value after five cycles. The adsorption process with AR was found through fitting the pseudo-second-order kinetics equations and the Freundlich adsorption model. The experimental results demonstrated that the TMGO nanomaterial could be rapidly extracted from the medium and had a good adsorption ability to remove dyes in wastewater.
研究领域:
环境科学
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材料科学
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2020
·
IF 0.936
Hai XU,Pan ZHANG,Shao-Yan ZHOU,Qiong JIA
A magnetic molecularly imprinted polymer (MIP) was synthesized for the adsorption of methylene blue (MB). Magnetic particles were fabricated with fullerenes, which increased the surface area and provided a delocalized π-conjugate structure to enhance the hydrophobicity. A novel functional monomer with double carboxyl groups was designed based on the substituent reaction of methacryloyl chloride and iminodiacetic acid. The magnetic surface MIP was obtained with the functional compound as monomer, MB as template, and 2-vinylbenzene as crosslinker. The maximum adsorption amount was calculated to be 41.5 mg/g. The adsorption isotherm results revealed that this enrichment process followed Freundlich isotherm model and the adsorption kinetics could be well described with pseudo-second-order equation. The adsorption behavior was multilayer and mainly driven by chemical adsorption.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Sheng Cai,Yirong Zhang,Zhi ming Liu,Luming Tian,Deliang He,Ruirui Zhu,Yan Xing
In this study, a novel carbon aerogel adsorbent (Mn-PA-CS) was synthesized through a one-step calcination-activation method using manganese acetate as the precursor. Unlike conventional phytic acid-activated carbons, this work introduces manganese doping as an effective strategy to tailor the pore structure and surface chemistry. The resulting material features enriched surface P/O functional groups and a significantly increased proportion of micropores (0.7–0.8 nm), which closely match the hydration diameter of Pb(II) ions, alongside elevated defect density (ID/IG = 0.94). These modifications synergistically promote adsorption through micropore filling, electrostatic attraction, and surface complexation. The optimized Mn-PA-CS, prepared with 100 mg of manganese acetate, exhibited a high Pb(II) uptake capacity of 302.88 mg·g -1 , which represents a 132.43% improvement compared to the undoped material. The adsorption behavior followed pseudo-second-order kinetics and the Freundlich isotherm, suggesting a spontaneous, endothermic, and multilayer chemisorption process. This study indicates that transition metal doping is a promising strategy for regulating the adsorption performance of bio-derived carbon materials.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Wang Yaoguang,Wu Di,Wei Qin,Wei Dong,Yan Tao,Yan Liangguo,Hu Lihua,Du Bin
In this study, branched polyethylenimine (PEI) enhanced magnetic carboxymethyl chitosan (MCMC-PEI) was synthesized and applied as adsorbent for the rapid removal of Pb(II) from aqueous solution. The successful synthesis of the adsorbent was proved by scanning electron microscope (SEM), Fourier transform infrared spectrum (FTIR) and X-ray powder diffraction (XRD). Simultaneously, the effect of the parameters such as initial concentration, adsorbent mass and pH of the solution on the removal of Pb(II) was studied by using response surface methodology (RSM). And central composite design (CCD), which is a widely used form of RSM, was employed in the experimental design procedure. The adsorption results revealed that the adsorption process could reach equilibrium rapidly within 10 min. Furthermore, the adsorption kinetic data could be well described by pseudo-second order model. The maximum adsorption capacity was 124.0 mg/g according to the Langmuir-Freundlich model, which fitted the adsorption isotherm of Pb(II) better than Langmuir model and Freundlich model, respectively. Thermodynamic studies (Δ G < 0, Δ H < 0, Δ S > 0) implied a spontaneous and exothermic process in nature. Meanwhile, the fabricated adsorbent exhibited excellent reusability. Therefore, the excellent adsorption property of MCMC-PEI made it a promising application in water treatment.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2020
·
IF 3.408
Jian Zhang,Minxia Kang,Yihong Zhou,Changpo Ma,Feng Ning,Zumin Qiu
In this study, a simple method was introduced to synthesize polyethyleneimine modified magnetic graphite (Fe 3 O 4 @GR-PEI( 50 )), which was used to adsorb humic acid (HA) from aqueous solution. The obtained materials were characterized by field emission scanning electron microscope , X-Ray diffraction, Fourier transform-infrared, and thermogravimetric analysis . The results showed that Fe 3 O 4 @GR-PEI( 50 ) was synthesized successfully and PEI uniformly covered on Fe 3 O 4 @GR-PEI( 50 ) surface. The adsorption performance was evaluated at different concentration, temperature, pH, and cationic concentration. The maximum adsorption capacity of Fe 3 O 4 @GR-PEI( 50 ) was 49.87 mg/g at 293 ± 1 K and it was greatly affected by the solution pH and the additional cations. This is mainly due to the strong electrostatic interactions between the negatively charged HA molecules and the positively charged adsorbents. The adsorption kinetics were examined using pseudo-first-order, pseudo-second-order and intra-particle diffusion model. The equilibrium adsorption data were analyzed by Langmuir and Freundlich models. The results revealed that the pseudo-second-order model and Freundlich isotherm fit the kinetics and equilibrium data, respectively. Furthermore, Fe 3 O 4 @GR-PEI( 50 ) exhibited a good performance of regeneration and reuse, which maintained a high adsorption capacity after six consecutive times of regeneration.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Jing-tao Li,Zhu-yu Li,Run Zhang,Li Zhao,Qi Niu,Ying-tao Dong,Ji-hong Li,Zhi-mo Fang,Qiang Lu,Kai Li
Spent bleaching clay (SBC) is a by-product of refining edible oil. The adsorbed oil in SBC can be recycled into aromatics via catalytic pyrolysis, whereas the solid product is a biological carbon-rich clay (PBC). In order to achieve the value-added utilization of PBC, an effective method was developed to prepare clay/carbon adsorbent (SBC/C–S) with high adsorption performance, and its adsorption capability was evaluated by adsorbing Pb(Ⅱ) from simulated Pb(Ⅱ)-contaminated wastewater. PBC was activated with sulfuric acid after pyrolysis to produce SBC/C–S, while the clay structure maintained the major mineral structure. The formed carbon layer primarily contributed to the microporous structure and active sites on surface, which was conducive to the efficient Pb(Ⅱ) adsorption. The adsorption thermodynamics and kinetics of SBC/C–S were studied via fitting different mathematical models, and the results matched well with pseudo-second order and Freundlich models. The adsorption mechanism of SBC/C–S might be electrostatic attraction or chemical complexation. The adsorption capacity of SBC/C–S reached 315.60 mg/g, much higher than that of fresh and H 2 SO 4 activated bleaching clays (69.03 and 295.28 mg/g). Therefore, SBC/C–S is a potential adsorbent with great reusability for Pb(Ⅱ) removal from industrial wastewater, which achieves the recycling and effective utilization of waste material.
研究领域:
环境科学
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化学工程
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材料科学
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水污染控制
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工业废弃物管理
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产品关联
DOI
高影响因子
Environmental Chemistry and Ecotoxicology
·
2025
·
IF 8.2
Gao Feiyue,Zhou Chuncai,Li Chen,Xu Shihai,Li Zhiguo,Li Xin,Liu Guijian
The novel ultra-micro porous carbon sheet (PCs) with exceptionally high surface area (3034 m 2 /g) were synthesized through green potassium citrate (K 3 C 6 H 5 O 7 ) activation for efficient thallium(I) [Tl(I)] removal from wastewater. The static adsorption results revealed that PCs achieved exceptional removal efficiencies above 95 % across pH 6–12, maintained high selectivity against competing ions (K + , Na + , Cl − , F − ) and organic interferents, and retained above 80 % capacity after five regeneration cycles. Adsorption followed Pseudo-second order kinetics and Freundlich isotherm models, indicating multilayer adsorption on heterogeneous surfaces, with thermodynamics confirming spontaneous exothermic processes. The density functional theory (DFT) calculation results demonstrated that lone pair electrons involved in complexation and π-electrons participating in coordination were supplied by oxygen-containing functional groups and aromatic rings, respectively. The sorption mechanisms included surface complexation, ion exchange, electrostatic attraction, and cation-π interaction. The column sorption results demonstrated the influent flow rate, bed height, and initial Tl(I) concentration-dependent removal performance. The Tl(I)-containing wastewater at ppm level could meet the discharge standard by optimizing influent flow rate and bed height in column adsorption. The dynamic sorption process was described properly by Thomas and Yoon-Nelson models. This study provides a systematic theoretical foundation for designing porous carbons in Tl-contaminated water remediation.
研究领域:
环境科学
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材料工程
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水处理技术
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物理化学
·
计算化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiaxue Sun,Chongqing Mei,Fanmin Zhu,Zhanbin Huang,Chuanfu Li
This study is to prepare a phosphorus-modified dolomite passivation material (P-DO) through hydrothermal method and synthesis for the remediation of cadmium (Cd) in acidic soil. The surface morphology and elemental composition of dolomite and its modified materials were characterized by scanning electron microscopy and energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The adsorption process was simulated using adsorption models to elucidate the Cd immobilization mechanisms. Experimental results demonstrated optimal alignment with the Freundlich isotherm and pseudo-second-order kinetic model, achieving adsorption equilibrium within 8 h. Spectroscopic analysis revealed three primary binding mechanisms: coordination through oxygen-containing carbon groups, Mg-O complexation, and phosphate ligand exchange via P-OH groups. Soil remediation trials established an optimal P-DO dosage of 1%, the passivation efficiency of Cd in soil by P-DO was 54.9%. Furthermore, this treatment decreased DTPA-extractable Cd by 12.696 mg·kg - ¹ and reduced acid-soluble Cd fractions by 42.3%. In summary, the modification of dolomite enables synergistic solid waste valorization and immobilization of Cd, positioning it as a high-performance functional material for sustainable remediation technologies.
研究领域:
环境科学
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材料科学
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土壤修复
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吸附技术
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地球化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuxin Li,Zhimin Wang,Yuanfeng Wei,Ting Wang,Maosong Zhao,Jie Luo,Jun Zhou,Zhaoshuang Li,Kai Yin,Chengbin Liu
Water decontamination from arsenic-contaminated groundwater is critical to the health of millions of households worldwide. However, efficiently removing the low-adsorbing As(III) remains challenging. Herein, a multifunctional biocomposite bead UiO-66-NH 2 -Cl@PCB integrating defects, oxidation and adsorption properties was prepared to effectively remove As(III). The N -chlorosulfonamide bound within the embedded UiO-66-NH 2 -Cl oxidizes the lower-adsorbing As(III) to As(V), which could be effectively adsorbed by the defect-rich MOF, while the porous chitosan bead (PCB) host ensures the utilisation of the reactive sites of UiO-66-NH 2 -Cl. Using 1 g/L of UiO-66-NH 2 -Cl@PCB, 1 mg/L of As(III) can be reduced to under 10 μg/L in 300 min. Furthermore, similar As(III) removal efficiencies were achieved across a wide pH spectrum (3–9) or in the presence of interfering substances (anions, cations, organic matter). High concentrations of phosphate will inhibit its performance. As(III) removal followed the Freundlich isotherm modal, and its maximum removal capacity reached 58.09 mg/g at pH 7. Furthermore, at equilibrium concentrations of 10 μg/L, its As(III) removal capacity exceeded 10 mg/g. UiO-66-NH 2 -Cl@PCB can purify the As(III)-spiked groundwater to meet the drinking standard level. Using NaOH solution for regeneration, the removal efficiency maintained above 70 % in the fifth cycle. Additional chlorination treatment can significantly improve reusability. 2.4 g of UiO-66-NH 2 -Cl@PCB packed fixed-bed column was capable of purifying 3820 BV of groundwater containing 100 μg/L of As(III). The proposed UiO-66-NH 2 -Cl@PCB has the potential to be an easy-to-use and reliable material for efficient As(III) removal.
研究领域:
环境科学
·
材料科学
·
水处理技术
·
化学工程
·
吸附与催化
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Aaron Albert Aryee,Chenping Gao,Runping Han,Lingbo Qu
The adverse effects of eutrophication have prompted the use of various remediation techniques for phosphate (PO 4 3– ) removal owing to it being the major causative agent. Herein, the influence of different solvents and ratios of 2-aminoterepthalic acid on the efficiency of magnetic biomass metal–organic framework composites based on the in situ growth of NH 2 -MIL-101 (Fe) onto magnetized peanut husks towards PO 4 3– removal was assessed via the adsorption technique. The magnetic biocomposite labelled as MPN@NH 2 -MIL-101 (Fe) exhibited the best efficiency owing to its mesoporous structures and presence of abundant oxygen and nitrogen possessing functional groups. Adsorption results confirmed MPN@NH 2 -MIL-101 (Fe) to have a high adsorption capacity of (14.0 ± 0.3) mg·L −1 at a PO 4 3− concentration of 20 mg·L −1 with an associated high stability within pH 2–10. The adsorption kinetics for the process was well described by both Elovich and pseudo-second-order kinetic models and was mediated by both internal diffusion and liquid film diffusion. The Temkin and Freundlich models fitted the equilibrium data well signifying occurrence of both physical and chemical adsorption on a heterogeneous surface. It is concluded that MPN@NH 2 -MIL-101 (Fe) is a promising adsorbent for the effective removal of phosphate from a water body.
研究领域:
环境科学
·
材料科学
·
水处理
·
化学工程
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产品关联
DOI
高影响因子
Organics
·
2025
·Vol. 6
·期 3
·36
·
IF 1.6
Liping Wang,Mingyu Zhang
Porous carbon-loaded MnO was prepared via a combination of the sol–gel method and the chemical blow molding method using polyvinylpyrrolidone (PVP) and manganese nitrate as starting materials. SEM, EDX, TEM, FTIR, XRD, XPS, nitrogen adsorption–desorption, and elemental analysis were used to assess its physical and chemical characteristics. Furthermore, the adsorption property of porous carbon-loaded MnO for hexavalent chromium (Cr(VI)) in polluted water was investigated in detail. The results demonstrated that large numbers of MnO nanoparticles were evenly mounted on the surfaces of carbon walls, with a uniform distribution of C, N, and O elements. The BET surface area was 46.728 m2/g, and the pore sizes of porous carbon ranged from 2 nm to 10 nm. Additionally, abundant surface functional groups were found in porous carbon-loaded MnO, a result consistent with XPS data and applicable to the adsorption of heavy metals from aqueous solutions containing Cr(VI). The Freundlich model fitted the adsorption isotherm well, and the pseudo−second−order model precisely matched the adsorption kinetics. According to the study results, the adsorption was multilayer, and the adsorption process involved an endothermic reaction. These results indicate that this is a feasible way to synthesize a high−efficiency adsorbent for the removal of harmful heavy−metal ions from wastewater.
研究领域:
环境科学
·
材料化学
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水处理技术
·
吸附材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）