Materials Today Communications
·
2023
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IF 3.8
Wei Chen,Fucheng Yun,Shenyi Zheng,Chen Shi,Jian Han
In this study, a simple two-step preparation method was used to prepare a new type of composite fiber adsorbent, metal–organic framework/chitosan/hydroxyapatite (ZIF-8 @CS/HAP), for the efficient removal of Lead ions（Pb(Ⅱ)）from water. The composite fiber was first characterized, and its surface morphology , functional groups, crystallinity, and pore structure were investigated. Subsequently, its optimal use environment was studied, and results found that the adsorbent could achieve the best effect in Pb(Ⅱ) solution with a starting concentration of 200 mg/L at pH ≥ 6 and a temperature of around 298 K. The presence of coexisting ions (Co 2+ , Sr 2+ , Ni 2+ , Cd 2+ , and Cu 2+ ) had no significant effect on the selective removal of Pb(Ⅱ) by ZIF-8 @CS/HAP. The process of ZIF-8 @CS/HAP adsorbing Pb(II) corresponded to the Langmuir model and the pseudo-second-order kinetic model, according to isotherm and kinetic investigations. The adsorption data fitted with the Langmuir model at 298 K reached a fitting degree (R 2 ) of 0.996, and the largest adsorption capacity up to 1058.2 mg/g, which is better than that in most fiber adsorbents. The adsorption mechanism could be attributed to the complexation of hydroxyl and amino groups on the surface of the composite fiber with Pb(Ⅱ), the coprecipitation of phosphate groups with Pb(Ⅱ), ion exchange, and electrostatic adsorption. This study provides an efficient adsorbent for treating Pb(Ⅱ)-contaminated wastewater. Its preparation process is environmental-friendly and easy to use, and it has a high adsorption capacity. Therefore, it has a wide array of potential applications in the field of water treatment.
研究领域:
环境科学
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材料科学
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水处理
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
You Yanran,Zhu Hongtao,Dong Hongliang,Sheng Guodong
In this work, FeS was anchored on mesoporous silica microspheres (SiO 2 200, SiO 2 500, and SiO 2 1000), and named as FeS@SiO 2 (i.e., FeS@SiO 2 200, FeS@SiO 2 500, FeS@SiO 2 1000), in adsorbing and detoxifying U(VI)/Cr(VI) from wastewater. Results demonstrated that FeS@SiO 2 exhibited higher efficiency towards U(VI)/Cr(VI), outperforming FeS and SiO 2 alone. Kinetic investigations revealed that adsorption of U(VI)/Cr(VI) followed pseudo–second–order model best, highlighting effective chemical interplay. XPS investigations demonstrated multi–species which was included FeS, Fe(II), S 2− and polysulfide (S 2 2− , S n 2− ) could be employed as reductants for U(VI)/Cr(VI) adsorption. The combination of SiO 2 and FeS offered an enhanced efficiency for U(VI)/Cr(VI), making these composites promising materials in water purification. Graphical
研究领域:
环境科学
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纳米技术
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材料科学
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水处理
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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
·
2019
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IF 3.131
Mi Wu,Shifeng Zhao,Mingxiu Tang,Ruisen Jing,Yifei Shao,Xijuan Liu,Yuanpeng Dong,Mingzhu Li,Qiang Liao,Guocheng Lv,Qian Zhang,Zilin Meng,Aiju Liu
The contaminantsin environment generally do not exist alone and possess different physical and chemical properties, their environmental behavior and mechanism of action in environment are more complicated. Montmorillonite was employed as adsorbent to remove tetracycline (TC) and sulfamethoxazole (SMZ) respectively and simultaneously under batch kinetic and different solution conditions. As the contaminant present singly, it only had a good effect to TC removal. The experimental data were well fitted to pseudo-second-order kinetic model, and the adsorption behavior followed the Langmuir isotherm indicated that TC adsorption was a monolayer coverage and charge-limited adsorption process . In addition, the TC molecular arrangement in the interlayer were analyzed experimentally and through simulation. While the contaminants co-exist, not only TC but also SMZ was removed effectively. SMZ adsorption mechanism were investigated through adsorption equilibrium experiment, characterization and molecular dynamics simulation . Experiment data showed that the best agreement was obtained with the Freundlich model and the adsorption mechanism was proved that SMZ was trapped by hydrophobic interaction.
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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DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 1
·1-13
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IF 3.8
Wang Degui,Xiao Qiuying,Xiao Yepeng,Cheng Lihua,Chen Hong,Chen Bing,Wang Suhua
Since lead is a non-biodegradable and neurotoxic heavy metal, efficient removal of Pb(II) from water is of great significance. Herein, a new type of functional cellulose with enriched thiourea groups (Thiourea-PC) was synthesized using the leaves of plumeria frangipani, a common agricultural solid waste, as the starting materials and applied for the efficient removal of lead ions from water. The properties of the cellulose-based adsorbent have been carefully analyzed and evaluated using FT-IR, SEM, XPS, and elemental analysis techniques. The results showed that the maximum adsorption capacity of Thiourea-PC was 173.92 mg/g under the optimal conditions. The adsorption mechanism was attributed to the complex reaction between Pb(II) and mercaptan/nitrogen-containing groups, and the adsorption process conformed to Langmuir isothermal adsorption model and Pseudo-second-order kinetic model. It is worth noting that after five cycles of adsorption–desorption, the removal rate of Pb(II) by Thiourea-pc was still high, reaching more than 97%, and it had been successfully applied to the simulated adsorption of actual water samples with excellent selectivity. Adsorbent precursors come from a wide range of sources, are economical and effective, and the resource utilization of biomass waste can be realized through sustainable synthesis.
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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吸附
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重金属去除
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生物质利用
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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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
REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Qiang Shi,Yi Wang,Wanjun Liu,Haiyan Zhang,Yemo Li,Jixuan Jiao,Wei Zhao,Yi Shen
A novel Rb + imprinted membrane was fabricated via non-solvent inversion phase separation method by blending template RbCl, poly(styrene- co -4-hydroxylstyrene) (P(S-co-VPh)) and polysulfone, where the phenolic hydroxyl groups of P(S- co -VPh)) spontaneously coordinated with template Rb + in the casting solution to form an imprinted Rb + site. Gel permeation chromatography , FTIR and 1 H NMR results indicated that the (P(S-co-VPh) had been synthesized successfully. The characterization of water contact angle, scanning electron microscope and membrane performance tests indicated that the blending membranes had better hydrophilicity , more porous structure and higher pure water flux. The adsorption behaviors of Rb + on the blending membranes were investigated depending on the parameters of solution pH , temperature, ions interference, Rb + concentration and contact time. The results indicated that the maximum Rb + adsorption capacity can be obtained when the solution pH is 9.0, and low temperature is favorable for adsorption because it is an exothermic process . As compared to Na + , Ca 2+ , and Mg 2+ , K + has the greatest ion interference effect, causing up to 58.1% decline in Rb + adsorption capacity for non-imprinted membranes but only 7.4% for imprinted membranes. The adsorption process conforms to Langmuir isothermal model and pseudo-second-order kinetic model , and the theoretical maximum adsorption of Rb + is 70.12 mg/g. Furthermore, the Rb + imprinted membrane can be reused at least five times using 0.1 M HCl solution as the eluent , indicating that membrane has potential application value in the separation and extraction of rubidium.
研究领域:
材料科学
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环境工程
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化学工程
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膜技术
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产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Zongli Ren,Yali Fang,Qiong Wu,Xin Ma
Dye wastewater poses a significant environmental threat, making the development of efficient and reusable adsorbents essential. In this study, we prepared a magnetic UiO-66 composite modified by β-CD (UiO-66@β-CD@Fe3O4) and evaluated the adsorption properties of this material on crystal violet and Congo red in aqueous solutions. β-CD was added to improve the host–guest interaction with dyes, and the Fe3O4 core made magnetic separation simple. Kinetic analysis supports the pseudo-second-order model, indicating that chemisorption is the main factor controlling the adsorption rate. Based on the Langmuir isotherm, the data suggest that adsorption occurs as a monolayer on a homogeneous surface. Maximum adsorption capacities were 542.75 mg/g for Congo red and 377.25 mg/g for crystal violet. Calculated thermodynamic values reflected an endothermic and energetically favorable adsorption mechanism. Additionally, the magnetic properties of UiO-66@β-CD@Fe3O4 enabled easy separation by using an external magnet. Strong adsorption performance was maintained by the material even after several adsorption–desorption cycles, indicating its reusability. UiO-66@β-CD@Fe3O4 exhibits promising performance in addressing dye-contaminated wastewater, confirming its application potential.
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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纳米技术
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水处理
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产品关联
DOI
PubMed
高影响因子
Gels
·
2025
·Vol. 11
·期 8
·646
·
IF 5.3
Zhisong Qian,Xinpeng Li,Gege Yan,Xiaoyong Chen,Mohd Shaiful Sajab,Gongtao Ding,Wan Nazihah Liyana Wan Jusoh
The use of pharmaceuticals to treat human and animal diseases has resulted in the increase of antibiotic traces in the water system and soil, thus raising concerns about the environmental aspect. In this study, sodium alginate (SA) and carboxymethyl chitosan (CMCS) hydrogel microbeads were developed to enhance the adsorption of antibiotics by applying electrostatic spray in the fabrication of microbeads. Two hydrogel microbead sizes, SC-400 (~400 µm) and SC-2000 (~2000 µm), were used for the adsorption of tetracycline (TC) and ciprofloxacin (CIP) antibiotics in single and binary systems. The microbeads exhibited a good adsorption capacity and were able to achieve a maximum adsorption at pH 7 and 25 °C. Adsorption kinetics expressed suitability in the pseudo-second-order kinetic model for TC and CIP antibiotics. These results demonstrate that both single and binary systems align well with the Freundlich and Temkin isotherm models, indicating their suitability in explaining the adsorption mechanisms. These mechanisms predominantly involve electrostatic interactions between the SA/CMCS hydrogel microbeads and the antibiotics TC and CIP. This study highlights the capability of using SA/CMCS hydrogel microbeads for antibiotic removal and other environmental applications.
研究领域:
环境科学
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材料工程
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药物污染
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水处理
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吸附技术
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Wenlong Li,Yuanhu Tang,Zirui Zhao,Yajing Zhang,Shujie Wang
Paclitaxel (PTX), an active anticancer compound derived from Taxus cuspidata , possesses considerable economic value. Given the abundance of structural analogs, the selective separation of PTX from T. cuspidata presents a formidable challenge. In this study, the bifunctional monomers magnetic molecular imprinted polymers (MMIPs) with multiple active sites were synthesized using Fe 3 O 4 as the magnetic carrier, PTX as the template, 4-vinylpyridine (4-VP) and methacrylic acid (MAA) as the first-stage and the second-stage pre-assembly functional monomer, respectively. The results indicated that MMIPs exhibited excellent magnetic recovery capability and high adsorption capacity for PTX. Furthermore, the adsorption behaviors were more consistent with Langmuir isotherm model and pseudo-second-order kinetic model. The MMIPs possessed significantly higher selectivity for PTX than five structural analogs (Docetaxel, Baccatin III, 10-Deacetylbaccatin III, and Glucose) and recyclability for up to six cycles. Additionally, the adsorption mechanism analysis indicated that the excellent performance of MMIPs primarily arises from the multiple active binding sites involving hydrogen bonding and π-π stacking. Finally, MMIPs were used for PTX recognition and separation in T. cuspidata extracts. This study provides an efficient method and valuable theoretical basis for the highly selective separation of PTX from T. cuspidata.
研究领域:
药物化学
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分析化学
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材料科学
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生物技术
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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
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材料科学
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核废物处理
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吸附技术
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化学工程
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放射化学
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水污染控制
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产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2018
·Vol. 41
·期 11
·2479-2487
·
IF 2.415
Zulei Zhang,Lei Li
We developed a facile approach to the construction of bio-recognition sites in silica nanoparticles for efficient separation of bovine hemoglobin based on amino-functionalized silica nanoparticles grafting by 3-aminopropyltriethoxylsilane providing hydrogen bonds with bovine hemoglobin through surface molecularly imprinting technology. The resulting amino-functionalized silica surface molecularly imprinted polymers were characterized using scanning electron microscope, transmission electronic microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. Results showed that the as-synthesized imprinted polymers exhibited spherical morphology and favorable thermal stability. The binding adsorption experiments showed that the imprinted polymers can reach equilibrium within 1 h. The Langmuir isotherm and pseudo-second-order kinetic model fitted the adsorption data well. Meanwhile, the imprinted polymers possessed a maximum binding capacity up to 90.3 mg/g and highly selectivity for the recognition of bovine hemoglobin. Moreover, such high binding capacity and selectivity retained after eight cycles, indicating the good stability and reusability of the imprinted polymers. Finally, successful application in the selective recognition of bovine hemoglobin from a real bovine blood sample indicated that the imprinted polymers displayed great potentials in efficient purification and separation of target proteins.
研究领域:
材料科学
·
生物化学
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纳米技术
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蛋白质分离
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
·
IF 4.916
Yi-Kun Li,Wei-tao Li,Xun Liu,Ting Yang,Ming-Li Chen,Jian-Hua Wang
A magnetic functionalized bio-sorbent based on aptamer was designed for the selective separation of ultra-trace Pb 2+ , shortly termed as Fe 3 O 4 @ [email protected] Pb(II) specific aptamer attached to the magnetic solid substrate served as affinity probe to capture and separate trace lead. Oligonucleotides with a polyA block were employed for the immobilization on the surface of AuNPs, with adenine sequences (polyA) as the part of effective anchoring block. The prepared Fe 3 O 4 @ [email protected] composites were characterized by FT-IR, SEM and XPS. The binding of lead on Fe 3 O 4 @ [email protected] composites surface was pH-dependent, the adsorption follows Langmuir model, and the adsorption dynamic fits the pseudo-second-order kinetics model. Procedure for lead separation and preconcentration was explored and combined with detection of graphite furnace atomic absorption spectrometry (GFAAS). Under the optimum condition, an enrichment factor of 17.73 was obtained with a sample volume of 1.0 mL. The limit of detection (LOD) was 57 ng L −1 along with a relative standard deviation (RSD) of 2.06 (n = 9). The procedure was further validated by a certified reference material GBW08608 and several environmental and blood samples.
研究领域:
环境科学
·
分析化学
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材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）