KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2014
·Vol. 31
·期 9
·1608-1615
·
IF 1.241
Liu Qian,Yang Bingchao,Zhang Lujie,Huang Ruihua
A multifunction adsorbent was synthesized by incorporating AC into CTS, and the ratio of AC to CTS was 1/1. The resultant was called activated carbon (AC)/chitosan (CTS) composite. The simultaneous adsorption of phenol and Cu 2+ from aqueous solution onto AC/CTS composite was investigated by a batch procedure. The adsorption processes for both Cu 2+ and phenol obeyed the pseudo second-order kinetic model. Phenol was prone to be adsorbed more quickly as compared with Cu 2+ when they coexisted in solution. The adsorption behavior of both phenol and Cu 2+ followed the Langmuir isotherm. The maximum adsorption capacities of phenol and Cu 2+ were 34.19 mg/g and 74.35 mg/g at 293 K, respectively. No obvious competitive adsorption existed between phenol and Cu 2+ .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2025
·
IF 1.8
Lin Liu,Chunxia Wang,Jun Du,Youpeng Zuo,Ligang Zhang,Xiaoxiao Hu,Zhenhua Xu
Metal corrosion has hindered the advancement of new technologies. The surfactant as one kind of corrosion inhibitor can effectively restrain metal corrosion in corrosive medium. In this research, two cationic Gemini surfactants, 3,3′-(ethane-1,2-diyl)bis(1-octyl-1 H -imidazol-3-ium) dibromide ([C 8 im-2-C 8 im]Br 2 ) and 3,3′-(butane-1,4-diyl)bis(1-octyl-1 H -imidazol-3-ium) dibromide ([C 8 im-4-C 8 im]Br 2 ), have been prepared for the corrosion inhibition of carbon steels in 1.0 mol/L HCl solution. The weight loss measurement demonstrates that two inhibitors both achieve high inhibition efficiencyies at concentration of 0.50 mM for carbon steels in 1.0 mol/L HCl solution. By comparison, the anticorrosion performance of [C 8 im-2-C 8 im]Br 2 for carbon steel specimens in 1.0 mol/L HCl solution are better than that of [C 8 im-4-C 8 im]Br 2 , and the maximum corrosion efficiency can reach 96.15% at the temperature of 30°C. The determination of adsorption thermodynamics and kinetics parameters reveals that the adsorption behavior of two inhibitors on the steel surface is chemisorption and follows Langmuir isotherm. Good anticorrosion performance of the inhibitor for carbon steel in HCl solution owes to a dense and compact protective film formed onto the steel surface. It indicates that the proposed cationic Gemini surfactants have great prospect in the corrosion inhibition of metals. Graphical 3,3′-(ethane-1,2-diyl)bis(1-octyl-1 H -imidazol-3-ium) dibromide as a corrosion inhibitor demonstrates good anticorrosion performance for carbon steel in hydrochloric acid solution. The chemical adsorption of the inhibitor onto carbon steel surface enables to form a dense and compact protective layer.
研究领域:
材料科学
·
腐蚀与防护
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2012
·Vol. 4
·期 7
·2423-2430
·
IF 5.914
Qing Cao,Feng Huang,Zanyong Zhuang,Zhang Lin
This work aims at the investigation of nano-Mg(OH)2 as a promising adsorbent for uranium recovery from water. Systematic analysis including the uranium adsorption isotherm, the kinetics and the thermodynamics of adsorption of low concentrations of uranyl tricarbonate (0.1–20 mg L−1) by nano-Mg(OH)2 was carried out. The results showed a spontaneous and exothermic uranium adsorption process by Mg(OH)2, which could be well described with pseudo second order kinetics. Surface site calculation and zeta potential measurement further demonstrated that UO2(CO3)34− was a monolayer adsorbed onto nano-Mg(OH)2 by electrostatic forces. Accordingly, the adsorption behavior met the conditions of the Langmuir isotherm. Moreover, in most of the reported literature, nano-Mg(OH)2 had a higher UO2(CO3)34− adsorption affinity b, which implied a higher adsorption amount at equilibrium in a dilute adsorbate system. The significance of the adsorption affinity b for choosing and designing adsorbents with respect to low concentration of resources/pollutants treatment has also been assessed.
研究领域:
环境科学
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材料科学
·
放射化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2022
·
IF 8.91
Guangyu Duan,Zhanfang Cao,Hong Zhong,Xin Ma,Shuai Wang
Heavy metal wastewater pollution has become an ecological challenge worldwide. This study reports the development of a novel poly (6-acryloylamino-N-hydroxyhexanamide) (PAHHA) resin for effective adsorption of heavy metal ions , including Cu 2+ , Pb 2+ and Ni 2+ . The chelating resin was synthesized by the grafting reaction between 6-amino-N-hydroxyhexanamide and polyacrylic resin , thus containing the hydroxamate and acylamino groups. The batch adsorption experiments revealed that the PAHHA resin exhibited an excellent adsorption performance for Cu 2+ , Pb 2+ and Ni 2+ . The maximum adsorption capacities of Cu 2+ , Pb 2+ and Ni 2+ were determined to be 238.59, 232.48 and 115.77 mg·g −1 , respectively. Based on the adsorption kinetics , the pseudo-second-order kinetic model was noted to fit well for all metal ions. The metal ion concentration as a function of the equilibrium adsorption capacity fitted well with the Langmuir isotherm , thus indicating the single layer adsorption process . The adsorption mechanism was investigated by using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), density functional theory (DFT) calculations, X-ray photoelectron spectroscopy (XPS) and adsorption isotherms . It was revealed that the PAHHA resin possessed multiple active sites, including –CONHOH, –CONH– and –COOH, which could strongly adsorb the metal ions. Specifically, the –CONHOH group displayed a high affinity by forming a stable five-membered ring with heavy metal ions. Overall, the developed resin exhibits advantages such as simple synthesis, inexpensive raw material and good recyclability , along with high adsorption ability, thus providing a new approach for efficiently treating wastewater contaminated with heavy metal ions.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2015
·Vol. 32
·期 6
·1129-1136
·
IF 1.166
Xiao Xuemin,Tian Fei,Yan Yujun,Wu Zhilin,Wu Zhansheng,Cravotto Giancarlo
Coal-based activated carbon (CAC) was prepared from coal produced in Xinjiang of China by microwave activation. CAC was characterized and used as an adsorbent for phenanthrene adsorption. The effects of temperature, adsorption time, CAC amount, initial concentration and pH value of solution on phenanthrene adsorption were studied. The adsorption rate of phenanthrene onto CAC was obtained nearly 100% with initial concentration of 100 mg/L and CAC dosage of 0.3 g at 25 °C. Phenanthrene adsorption was well described with the Langmuir isotherm. The pseudo-second-order model was found to more effectively explain the adsorption kinetics of phenanthrene. The lower temperature was favorable to the adsorption rate and equilibrium adsorption capacity of phenanthrene onto CAC. The thermodynamic parameters ΔH θ , ΔS θ and ΔG θ computed for phenanthrene adsorption onto CAC demonstrate the process was spontaneous, radiative, and entropically driven. Thus, CAC prepared by microwave activation could be effective for removing phenanthrene.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2015
·
IF 2.858
Zhan-Chao Wu,Zhao-Zhan Wang,Jie Liu,Jin-Hua Yin,Shao-Ping Kuang
A new porous magnetic chitosan modified by melamine (MA-CS/Fe 3 O 4 ) was synthesized. The compositions and surface topographies were characterized by infrared (IR) spectroscopy, X-ray diffraction (XRD) analysis, thermogravimetric (TG) analysis and scanning electron microscope (SEM), respectively. The results of adsorption kinetics showed the adsorption behavior could be better described by the pseudo-second-order equation ( R > 0.999). The adsorption isotherm was well fitted by the Langmuir equation ( R > 0.999), and the values of separation factors were in the range of 0–1.0. The maximum adsorption capacity for Cu(II) was 2.58 mmol g −1 at the optimal experimental conditions, which were pH = 5.5, t = 25 min, C 0 = 5.0 mmol L −1 . The rate-controlling step was supposed to be chemical adsorption rather than mass transport. The adsorbent still exhibited high adsorption capacity after five regeneration cycles. The adsorption mechanism was due to coordination between Cu(II) and N atoms.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 330
·期 1
·225-235
·
IF 1.371
Yunyun Bao,Jiang Chao,Liu Yan,Wang Changfu,Liu Jinbiao
In this study, sulfonic acid-functionalized carbon materials (CS-SO 3 H) was carbonized and functionalized by polyphosphazene (PZS). The morphology and structure were characterized by FTIR, XPS and SEM. The influences of pH, contact time, initial concentration and temperature of CS-SO 3 H for uranyl ions were investigated. Results indicated that the adsorption equilibrium time was about 20 min. The adsorption process was more consistent with the Langmuir isotherm and the pseudo-second-order model. In addition, the maximum adsorption capacity of CS-SO 3 H was about 341.98 mg/g. Moreover, the thermodynamic parameters of ΔG, ΔH and ΔS show that the uranium adsorption process was spontaneous and endothermic.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 22
·期 8
·1147-1155
·
IF 1.87
Habimana Fabien,Huo Yanxia,Jiang Sai,Ji Shengfu
Europium metal organic framework (Eu-MOF) was synthesized using Europium as metal ion center and 1,3,5-trimesic acid (H 3 BTC) as organic ligand under hydrosolvothermal conditions. The dynamic performance of the Eu-MOF material in adsorption desulfurization processes was investigated using a solution of thiophene/n-octane as sulfur containing quality model oil. The adsorption desulfurization kinetics equations and adsorption desulfurization isotherms of Eu-MOF were also studied. The results have shown that Eu-MOF catalyst has very good adsorption desulfurization abilities under optimum desulfurization conditions of m adsorbent : m model oil ratio of 1:100 and reaction temperature of 303 K. After 4 h of desulfurization reaction, the adsorption rate and the adsorption desulfurization capacity has reached 64.70% and 24.59 mgS/gMOF respectively. The Eu-MOF adsorption desulfurization process of thiophene on Eu-MOF fits well the quasi two level dynamic model using Langmuir isotherm, Freundlich isotherm and Dubinin–Radushkevich isotherm equations. The Dubinin–Radushkevich isotherm can be a suitable description of adsorption process for Eu-MOF absorbent on thiophene/n-octane mode oil. However the Freundlich isotherm equation model with fitting R
2 value closer to 1, can be a better description for the adsorption of thiophene. The adsorption of thiophene over Eu-MOF absorbent has two types of adsorption that occur simultaneously. These are the monolayer physical adsorption and the multilayer chemical adsorption.
研究领域:
材料科学
·
环境化学
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2020
·
IF 4.872
Sumei Li,Fan Feng,Sha Chen,Xiaolei Zhang,Yixuan Liang,Saisai Shan
MOFs are usually used as efficient adsorbents to remove specific pollutants in water. However, because of their poor water stability relatively small particle size, their application in adsorbing and removing pollutants from water is limited. In this paper, with nitrile rubber sponge as the substrate, UiO-66-NH 2 /sponge composites were firstly in-situ synthesized and systematically evaluated UiO-66-NH 2 as an adsorbent to remove 2,4-dichlorophenoxyacetic acid from water. This composite could not only remain the adsorption capacity for 2,4-dichlorophenoxyacetic acid of UiO-66-NH 2 , but also was much more convenient for separation after the adsorption compared to UiO-66-NH 2 . In addition, the mechanism of the adsorption of UiO-66-NH 2 for 2,4-dichlorophenoxyacetic acid were discussed in detail. Electrostatic interaction between UiO-66-NH 2 and 2,4-dichlorophenoxyacetic acid was the main adsorption mechanism. The adsorption was mainly suitable for Langmuir isotherm models, and its maximum adsorption capacity of 2,4-dichlorophenoxyacetic acid was 72.99 mg g −1 .
研究领域:
环境科学
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化学工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2017
·Vol. 17
·期 9
·6489-6496
·
IF 1.483
Chen Yun-Xia,Li Ru-Chang,Zhang Yuan-Hu,Chen Xue-Gang,Ye Ying
Halloysite/MnFe2O4 nanocomposites have been proposed as a novel material which can be used in magnetic and electromagnetic applications. In this study, we fabricated two kinds of halloysite/MnFe2O4 nanocomposites. The XRD and TEM characterizations
suggested that ferrite nanoparticles were mainly adhered on the outer surface of HNTs (named as WMH) and in the inner wall (MH), respectively. Both MH and WMH were applied to adsorb methylene blue (MB) from aqueous solutions. The results indicated that both MH and WMH can remove more than
97% MB at a dosage of 2 g L−1 and initial MB concentration of 20 mg L−1. The adsorption processes by both nanocomposites fit pseudo-second-order kinetic model and Langmuir isotherm with correlation coefficient of >0.99. WMH (19.19 mg g−1)
shows slightly higher maximum adsorption capacity than MH (18.52 mg g−1), contradicts to the fact that the mesopore volume of MH is 30% larger than that of WMH. It can be reconciled by the strong bonding between the outer surface ferrite nanoparticles of WMH and the MB molecules,
which greatly enhanced the MB adsorption capacity. In addition, the dimethylamino groups of MB molecules were preferably removed, suggesting the MB degradation by the ferrite nanoparticles during adsorption. Furthermore, both WMH and MH can be easily magnetic separated and recycled. The MB
removal efficiency can be maintained at after regenerated for 5 times. Ascribed to the advantages of easily recycling and regeneration, low cost, and MB degradation, the halloysite-MnFe2O4 nanocomposites are potential environmental friendly adsorbents for removing organic
pollutants.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Shuyu Wang,Xiaohui Wu,Lijuan Ren,Xian Pei,Hui Fang,Ping Lv,Ning Nan,Xianwei Lv,Xianming Zheng,Feihe Ma,Yun Wu,Yuping Liu,Linqi Shi
Adsorbents with high selectivity and adsorption capacity are of significant interest for the removal of dye pollutants. Herein, we report a facile low-temperature solvothermal synthesis of clew-like Cu2O/CuO microspheres by using cupric acetate monohydrate as the copper resource and ethylene glycol as the solvent and morphology modulator. The synthesized Cu2O/CuO microspheres showed high selective adsorption to anionic dyes (e.g., methyl orange (MO) and Reactive Red 2 (RR2)) rather than to cationic dyes (e.g., methylene blue (MB), Rhodamine B (RhB)). MO was then selected to evaluate the parameters of adsorption due to the adsorbent exhibiting the highest adsorption capacity for MO. We demonstrate that the adsorption of MO by Cu2O/CuO microspheres has a good correlation with the pseudo-second-order model and Langmuir isotherm with a maximum adsorption capacity of 826.45 mg/g, which is higher than that of previously reported metal oxide material adsorbents. The excellent adsorption ability of clew-like Cu2O/CuO microspheres to MO may be attributed to the synergistic effects of electrostatic attraction, unique hierarchical structure, and crystal defects of the prepared Cu2O/CuO microspheres. We believe our work provides new insight into the synthesis of high-performance adsorbents.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 14
·4332-4338
·
IF 5.368
Feng Wang,Liyan Huang,Jun Li,Lina Lin,Zhengping Liu,Zhaoxia Dong
Well-defined superparamagnetic and conductive Fe3O4/polyaniline (PANI) hollow spheres were fabricated using positively charged polystyrene (PS) spheres as templates. The negatively charged Fe3O4 particles, which were decorated by citric acid, can be attached onto the surface of the PS spheres via electrostatic interaction. Subsequently, the PANI layer was coated onto the PS/Fe3O4 templates by in situ chemical oxidative polymerization. Finally, removal of the PS core by dissolving with tetrahydrofuran provided the electromagnetic hollow spheres. Morphologies and compositions of Fe3O4/PANI hollow spheres were investigated by using SEM, TEM, FTIR and XRD. Magnetic analysis demonstrates that the synthesized composite spheres possess the characteristic of superparamagnetism and the saturation magnetization value is 26.2 emu g−1. Batch adsorption shows that the Fe3O4/PANI hollow spheres exhibit high uptake property of Pb2+ in aqueous solution. The adsorption kinetics follows the mechanism of pseudo-second-order kinetics and the sorption agrees well with the Langmuir isotherm.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）