MICROCHIMICA ACTA
·
2012
·Vol. 179
·期 1
·123-130
·
IF 3.033
Li Hui,Xu Wanzhen,Wang Ningwei,Ma Xuhai,Niu Dandan,Jiang Bo,Liu Lukuan,Huang Weihong,Yang Wenming,Zhou Zhiping
We report on the synthesis of magnetic molecularly imprinted polymers (m-MIPs) for the selective adsorption and separation of dibenzothiophene (DBT) from oil solution. The m-MIPs were characterized by Fourier transform infrared analysis, transmission electron microscopy, surface area and porosity analysis, and vibrating sample magnetometry. Batch mode adsorption studies were carried out to investigate the adsorption kinetics, adsorption isotherms and selective recognition. The adsorption kinetics were modeled with the pseudo-first-order and pseudo-second-order kinetics, and the adsorption isotherms were fitted with Langmuir and Freundlich models. The m-MIPs can selectively recognize DBT over similar compounds. Static adsorption experiments showed that the m-MIPs display excellent recognition capacity, selective affinity for DBT, and superparamagnetism in presence of an external magnetic field.
TEM images of the Fe 3 O 4 (A), Fe 3 O 4 @SiO 2 (B), Fe 3 O 4 @SiO 2 @MIPs (C) and (D). The morphology of Fe 3 O 4 , Fe 3 O 4 @SiO 2 , Fe 3 O 4 @SiO 2 @MIPs was observed by TEM. As can be observed in Fig. 2, the Fe 3 O 4 magnetic nanoparticles (Fig. 2a) had a diameter in the range of 8–16 nm, which indicated the prepared magnetic nanoparticles were superparamagnetic. It could be found from Fig. 2b and c, 2D that all samples displayed spherical shape before and after being encapsulated by silica and MIP. There are significant layers present on the surface of Fe 3 O 4 @SiO 2 , which indicated MIP has been successfully prepared.
研究领域:
材料科学
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环境化学
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分析化学
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产品关联
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2023
·
IF 5.7
Li Hui,Chen Xu,Tang Yibo,Yang Yue,He Feng,Wang Xin,Li Ganlu,Chen Kequan,Ouyang Pingkai,Yang Yuning
1,5-Pentanediamine hydrochloride (PDAH) was an important raw material for the preparation of bio-based pentamethylene diisocyanate (PDI). PDI has shown excellent properties in the application of adhesives and thermosetting polyurethane. In this study, PDAH was recovered from 1,5-pentanediamine (PDA) fermentation broth using a cation exchange resin and purified by crystallization. D152 was selected as the most suitable resin for purifying PDAH. The effects of solution pH, initial temperature, concentration of PDA, and adsorption time were studied by the static adsorption method. The equilibrium adsorption data were well fitted to Langmiur, Freundlich, and Temkin-Pyzhev adsorption isotherms. The adsorption free energy, enthalpy, and entropy were calculated. The experimental data were well described by the pseudo first-order kinetics model. The dynamic experiment in the fixed bed column showed that under optimal conditions, the adsorption capacity reached 96.45 mg g−1, and the recovery proportion of the effective section reached 80.16%. In addition, the crystallization of the PDAH solution obtained by elution proved that the crystal product quality of resin eluting solution was highest. Thus, our research will contribute to the industrial scale-up of the separation of PDAH.
研究领域:
化学工程
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生化工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2015
·
IF 0.669
Wenming Yang,Yang Cao,Xiaoni Ni,Weihong Hunag,Wanzhen Xu
We herein report the successful synthesis of molecularly imprinted polymers (MIPs) by surface imprinting methods. The synthesized MIPs were subsequently used to selectively adsorb indole from fuel oil. A new polymerization method (SR&NI ATRP), which combines the atom transfer radical polymerization (ATRP) and reverse atom transfer radical polymerization methods, is applied for the preparation of indole–MIPs. The indole–MIPs prepared have large specific surface area and porosity, as revealed by a series of morphology characterization studies. Static adsorption data indicate that the adsorption capacity of indole–MIPs was 55.8 mg g−1, and the adsorption equilibrium is achieved in 120 minutes. According to the results of thermodynamic analysis, the adsorption process is spontaneous. In addition, results of kinetics analysis indicated that the adsorption performances of indole–MIPs obey pseudo-second-order model. The Sips and Langmuir equations better fitted with the experimental isothermal data than the Freundlich equation. The selectivity of indole–MIPs was significant and the adsorbent could be reused even after five regeneration cycles.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2020
·Vol. 147
·期 1
·04020142
·
IF 1.264
Yuefeng Qiu,Liming Kong,Tonghe Chen,Qin Xu
Cu+-modified SBA-15 (Cu+/SBA-15, SBA-15 refers well-ordered hexagonal mesoporous silica) was prepared for adsorption of tetracycline (TC) by the pH adjusting reduction method. Some Cu+ species (Cu2O) are aggregated on the outside surface of SBA-15, and the other Cu+ species are highly dispersed in SBA-15 via ≡Si-O-Cu. Its adsorption mechanism was firstly studied via comparison with CuO/SBA-15. The TC adsorption kinetic of Cu+/SBA-15 fitted the pseudo-second-order model well. The adsorption isotherms at 293, 303, and 313 K were determined and modeled with Langmuir and Freundlich equations, and the Qmax of Cu+/SBA-15 for TC calculated from Langmuir model could reach 961.54 mg/g at 313 K. Its good adsorption performance for TC is associated with the high surface area of SBA-15, highly dispersed Cu+ species, and mesoporous structure. The adsorption of Cu+/SBA-15 for TC is an endothermic process, and adsorption heat is 66.88 kJ·mol−1, which implies that the adsorption process of Cu+/SBA-15 for TC is weak chemisorption. The adsorption mechanism of Cu+/SBA-15 was mainly explored via comparing with CuO/SBA-15 by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) spectroscopy analysis. Besides the coordination complexation of Cu+ with NH2 radical of TC, the π-complexation between Cu+, and the benzene ring of TC improved the adsorption capacity of Cu+/SBA-15 for TC comparing with CuO/SBA-15 and showed a dominant role for TC 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
·
分析化学
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DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Tong Xu,Xiaopei Ding,Chengcai Li,Haoyang Cheng,Guojin Liu,Hailin Zhu,Yuhai Guo,Xueliang Jiang,Jiuming Li
Accelerated industrial expansion has led to significant wastewater pollution, with effluent containing the toxic heavy metal Cr(VI) posing severe threats to ecosystems and human health. The combination of metal-organic frameworks (MOFs) and membrane separation techniques offers promising solutions for pollutant removal. This study developed a polytetrafluoroethylene (PTFE)-based composite membrane for effective Cr(VI) removal from aqueous solutions. This membrane was prepared through the in-situ synthesis of zinc-zirconium bimetallic MOFs on a PTFE membrane that had been modified with L-DOPA/PEI. The composite membrane demonstrated optimal Cr(VI) adsorption at a Zr:Zn molar ratio of 1:4, under conditions of 45 °C and pH = 2, with a maximum adsorption capacity of 335.1 mg/g. The adsorption process of Cr(VI) onto the composite membrane adhered to both the pseudo-second-order kinetic model and the Freundlich adsorption isotherm. Thermodynamic analyses confirmed a spontaneous, endothermic process. The composite membrane, with its excellent adsorption capacity, filtration performance, and recyclability, stands out as a highly effective material for the removal of Cr(VI) from aqueous solutions. Furthermore, it addresses the issues of aggregation, difficulty in separation, and the recycling challenges associated with powder-like MOFs, demonstrating significant potential for practical applications.
研究领域:
环境科学
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材料工程
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水处理
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yuan Bai,Xinyu Gan,Zongxian Jing,Pengfei Fan
The development of efficient and environmentally sustainable adsorbents for dye removal from wastewater remains a significant environmental challenge. Azo dyes, such as methyl orange (MO), persist in aquatic environments due to their high chemical stability and resistance to biodegradation. Although chitosan-based materials have been extensively studied for dye adsorption, their low solubility, poor mechanical stability, and limited adsorption capacity restrict large-scale applications. In this study, sulfonated chitosan/graphene oxide (SCSGO) and N,O-carboxymethyl chitosan/graphene oxide (N,O-CMCSGO) were synthesized and evaluated for MO adsorption. SCSGO and N,O-CMCSGO exhibit high MO adsorption capacities (265.67 and 239.60 mg/g, respectively), with Freundlich isotherm modeling confirming multilayer adsorption on heterogeneous surfaces via combined electrostatic, hydrogen bonding, and π–π interactions. Kinetic analysis indicates nonspontaneous adsorption controlled by external and intraparticle diffusion. FTIR and XPS analyses confirm that functionalization alters the surface chemistry, enhancing the MO affinity. Notably, after five consecutive adsorption–desorption cycles, SCSGO maintains over 90% of its original adsorption efficiency.
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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高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Chemistry and Pharmacy
·
2021
·
IF 4.508
Jingbao Wang,Jing Jing,Li Feng,Hailin Zhu,Zhiyong Hu,Xuemei Ma
The corrosion inhibition behavior and adsorption mechanism of three novel synthetic surfactants in 1 M HCl solution on carbon steel were investigated. The PP results confirmed that all the synthetic surfactants behave as mixed-type inhibitors, while the EIS results validated the existence of a protective layer by the adsorption of inhibitor molecules on the carbon surface. T 3 was observed to offer the highest inhibition efficiency ( η w , 96.28%) at 1 mM by the static weight loss measurements due to two different hydrophobic chains which form a more compact film with the crosswise arrangement. SEM/EDS and XPS results revealed the formation of the surfactants film on the carbon steel surface. Molecular dynamics simulation (MD) was further executed to determine the adsorption mechanism in molecular level insights. In addition, a linear correlation between surface activity ( γ ) and corrosion inhibition efficiency ( η w ) was verified. The adsorption of the prepared surfactants followed the Freundlich isotherm at different concentration ranges. Moreover, the bilayer/multilayer adsorption mechanism was also proposed and confirmed by experimental, adsorption isotherm studies and MD. Hence, both MD simulations and experimental results revealed the analogous inhibition with the order follows: T 3 > T 2 > T 1 .
研究领域:
材料科学
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腐蚀工程
·
表面化学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Mengjie Zhao,Kangping Cui,Xing Chen,Haiyang Li,Wenming Wu
This study presents two novel chelating resins for achieving ultra-low discharge standards in electroplating wastewater treatment, addressing the critical challenge of reducing Ni concentration from about 1 mg/L to <0.1 mg/L in secondary effluent. SDC-1 and SDC-2 were innovatively synthesized by functionalizing styrene-divinylbenzene (SDC) white spheres with hydroxamic acid and sodium dithiocarbamate groups, respectively. Both resins demonstrated exceptional performance in removing complexed Ni(II) from secondary effluent to below 0.1 mg/L, with SDC-2 achieving remarkably low concentrations of 0.03 mg/L, meeting national ultra-low emission standards. Comprehensive characterization using FTIR, FESEM, BET, and XPS, combined with thermodynamic and kinetic modeling and DFT calculations, revealed the superior adsorption mechanisms. The adsorption behaviors of both resins fitted well with the Freundlich isotherm model and the pseudo-second-order kinetic model. DFT calculations unveiled that both resins possess abundant active sites capable of decomposing Ni(II) complexes for deep wastewater treatment. Mechanistic insights showed that SDC-1 forms stable five-membered cyclic coordination complexes through O and N atoms of -CONHOH groups, while SDC-2 creates more structurally stable polydentate complexes via simultaneous coordination of N and S atoms in -HN-C(=S)-S-Na + groups with Ni(II). This work establishes a promising new strategy for deep removal of complexed heavy metal ions to achieve ultra-low discharge standards in industrial wastewater treatment.
研究领域:
环境工程
·
废水处理
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重金属去除
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Qianqian Song,Jianli Liang,Yi Fang,Zhonglu Guo,Zhao Du,Lei Zhang,Zhenya Liu,Yang Huang,Jing Lin,Chengchun Tang
Contamination of aqueous environment caused by various antibiotics has attracted wide attention. It is important to find effective adsorbents for the removal of toxic compounds. Herein, Ni (II) was anchored at the surface of porous boron nitride (BN) by a facile way to enhance the adsorption performance for tetracycline (TC). The interaction between porous BN and Ni (II) was proved to be B-O-Ni bond. It is noteworthy that Ni (II) modified porous BN shows excellent removal percentage up to 99.769% for TC which far exceeds the pristine porous BN (70.853%) and most other reported adsorption materials. The maximum adsorption capacity calculated from the Langmuir model is 429.582 mg g −1 , confirming that Ni (II) modified porous BN has a remarkable performance for removing TC. In addition, the adsorption of TC onto Ni (II) modified porous BN followed pseudo-second-order kinetics and the equilibrium data fitted well with the Freundlich isotherm, revealing that chemisorption and multilayer adsorption was dominated. Finally, the results of DFT calculations further demonstrated that the effective adsorption of TC on Ni (II) modified porous BN could be ascribed to cation bridge interaction, π-π interaction, Van de Waals force and electrostatic interaction.
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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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Langrun Song,Jun Nan,Bohan Liu,Fangmin Wu
Excessive phosphorus in water causes environmental security problems like eutrophication . Advanced two-dimensional material MXene has attracted raising attention in aquatic adsorption, while lack of selectivity and difficult recovery limit its application in phosphate removal . In this study, Ti 3 C 2 -MXene embedded zirconium-crosslinked SA (MX-ZrSA) beads were synthesized and their phosphate adsorption performance under different conditions was assessed. Investigations using SEM/EDS, XRD, BET, TGA and contact angle meter reveal that the addition of Ti 3 C 2 -MXene enhanced the thermal stability, mechanical strength, hydrophilicity, and formed loose network-like mesoporous inner structure with large surface area. The theoretical maximum adsorption capacity was 492.55 mg P/g and was well fitted by Freundlich and optimized Langmuir models. The Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis showed that chemisorption was involved, and the formation of Zr–O–P and Ti–O–P complexes accounted for high selectivity and affinity to phosphate. The adsorption experiments in real waters and lab-scale continuous flow Anaerobic-Anoxic-Oxic reactor further indicated the application potential of MX-ZrSA beads. Our study will provide insight into MXene and SA aerogel synergistic adsorption of aquatic contaminants and help with the removal and recovery of finite phosphorus resource.
研究领域:
环境科学
·
材料科学
·
水处理
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Wenrui He,Sui’an Wan,Meng Xu,Wei Wei,Dongfang Wang,Chuan Yi,Yufeng Zhao
The extensive use of microplastics (MPs) and antibiotics has not only exacerbated environmental pollution, but the composite pollutants formed by them also pose escalating ecological risks. This study investigated the impact of aging time on the biodegradable polylactic acid (PLA) and non-degradable polyvinyl chloride (PVC), as well as the adsorption/desorption behavior of norfloxacin (NOR), ciprofloxacin (CIP), and sulfamethoxazole (SMZ) onto these MPs. The effects of ultraviolet (UV) aging (30, 60, and 90 days) on MPs’ physicochemical properties and adsorption performance were systematically evaluated. The results showed that UV aging altered MPs’ surface morphology, crystallinity, and surface charge, enhancing their adsorption capacity. Adsorption kinetics followed the pseudo-second-order model, while isotherms aligned with the Freundlich model, indicating multilayer adsorption governed by physical and chemical interactions (e.g., hydrogen bonding, electrostatic, hydrophobic, and π-π interactions). The adsorption capacities followed the order NOR > CIP > SMZ, with aged PLA exhibiting superior performance (PLA-90d > PLA-60d > PLA-30d > pristine PLA > PVC-90d > PVC-60d > PVC-30d > pristine PVC). PLA exhibited a higher adsorption capacity for antibiotics than PVC, indicating that biodegradable MPs have a stronger ability to adsorb organic pollutants. Desorption experiments were conducted in different pH and waters. The results revealed that PLA-90d and PVC-90d exhibited the highest NOR release rates (30.43 % and 24.64 %, respectively) at pH 11, with seawater promoting greater desorption than lake or ultrapure water due to ionic competition. These findings highlight the critical role of aging in amplifying MPs’ environmental risks as carriers of antibiotics.
研究领域:
环境科学
·
污染生态学
·
高分子材料科学
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水污染与治理
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环境化学
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吸附技术
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材料老化
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海洋污染
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生态毒理学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Miaoling Chen,Yu Chen,Zhengyuan Zhou,Purui Lin,Minhua Su,Jiacheng Min,Kaimin Shih,Ying Zhou
Radioactive strontium (Sr 2+ ) and cobalt (Co 2+ ) in nuclear wastewater pose significant environmental risks, leading the need of developing effective remediation strategies. In this study, a poly (triazine imide) (PTI) composite intercalated with bromide (Br − ), referred to as PTI/LiBr, synthesized via a molten salt method, is introduced as a novel adsorbent for the removals of Sr 2+ and Co 2+ . PTI/LiBr composite exhibited rapid adsorption and high efficiency for both radionuclides, driven by electrostatic interactions and partial exchange of Li + ions. The removal efficiency for Sr 2+ and Co 2+ exceeded 95 % within 30 min. Adsorption kinetics followed a pseudo-second-order model, while isotherm analysis indicated that Sr 2+ adsorption aligned with the Freundlich model and Co 2+ adsorption followed the Langmuir model. The adsorption process was confirmed to be spontaneous and endothermic. The γ-radiation tolerance tests verified the structural stability and high adsorption efficiency of the material under ionizing radiation conditions. Additionally, DFT-based wave function and charge density analyses showed a stronger and more stable interaction between PTI/LiBr and Co 2+ compared to Sr 2+ , which might be driven by favorable magnetic interactions and significant charge transfer. This study highlights the potential of PTI/LiBr as a robust and efficient adsorbent for mitigating radioactive pollutants in complex aqueous environments.
研究领域:
环境科学
·
材料科学
·
核废物处理
·
吸附技术
·
化学工程
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放射化学
·
水污染控制
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）