JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
·
IF 1.6
Yuan Yijun,Li Jiawei,Zhang Sinan,Dong Ceyu,Tang Shun,Tu Zimeng,Liu Nana
Nuclear power stands as a linchpin in decarbonization efforts, primarily due to its dense energy output per unit and the virtual absence of emissions when operational. Exploiting the vast uranium reserves in the ocean is crucial for overcoming land resource scarcity and providing a sustainable, long-term solution. This research aimed to evaluate the adsorptive capacity of a novel marine-derived diatom species, Phaeodactylum tricornutum , for low-concentration uranium in simulated seawater. Biosorption results across varying experimental conditions demonstrate that Phaeodactylum tricornutum exhibits outstanding uranium adsorption capacity ( q max = 13.67 mg g −1 ). Additionally, Phaeodactylum tricornutum sustained exceptional uranium (U(VI)) selectivity and demonstrated favorable reusability in aqueous solution systems. A chemisorption process featuring uniform monolayer adsorption was corroborated by the pseudo-second-order and Langmuir model fittings. Thermodynamic analysis revealed that the adsorption process was spontaneous, endothermic, and characterized by increased randomness. The dominant adsorption mechanism was identified as coordination between uranyl ions and hydroxyl, carboxyl and amino groups. Owing to its abundant sources, easy accessibility, eco-friendliness and recyclability, the marine diatom Phaeodactylum tricornutum demonstrates significant promise for application in seawater uranium extraction.
研究领域:
海洋生物技术
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环境科学
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核能
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生物吸附
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水体化学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2024
·
IF 4.2
Zhirong Wang,Qiuxia Fu,Dandan Xie,Fujie Wang,Guangyu Zhang,Haoru Shan
The excessive utilization of antimicrobials in humans and animals has resulted in considerable environmental contamination, necessitating the development of high-performance antibiotic adsorption media. A significant challenge is the development of composite nanofibrous materials that are both beneficial and easy to fabricate, with the aim of improving adsorption capacity. Herein, a new kind of zeolitic imidazolate framework-8 (ZIF-8)-modified regenerated cellulose nanofibrous membrane (ZIF-8@RC NFM) was designed and fabricated by combining electrospinning and in situ surface modification technologies. Benefiting from its favorable surface wettability, enhanced tensile strength, interconnected porous structure, and relatively large specific surface area, the resulting ZIF-8@RC NFMs exhibit a relatively high adsorption capacity for tetracycline hydrochloride (TCH) of 105 mg g −1 within 3 h. Moreover, a Langmuir isotherm model and a pseudo-second-order model have been demonstrated to be more appropriate for the description of the TCH adsorption process of ZIF-8@RC-3 NFMs. Additionally, this composite fibrous material could keep a relatively stable adsorption capability under various ionic strengths. The successful fabrication of the novel ZIF-8@RC NFMs may shed light on the further development of wastewater adsorption treatment 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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Qinglong Luo,Lei Liu,Ruiqiang Dong,Zhongfu Cheng,Mingzhe Dong,Zhijian Wu,Jun Li,Xueli Huang
ABSTRACT The removal of boron from aqueous solution and the enrichment of boron from salt lake have attracted more attention. In this work, organo-inorganic hybrid mesoporous boron adsorbents were synthesized by tris(hydroxymethyl)methyl aminomethane (TRIS) grafted onto the meso-porous SBA-15, SBA-16 and MCM-41, respectively. And the structures are characterized by infrared, scanning electron microscopy, energy-dispersive X-ray, mapping, X-ray diffraction, point of zero charge, and Marvin laser particle size analyzer. The results showed that TRIS was successfully grafted onto SBA-15, SBA-16, and MCM-41. The adsorption isotherm and adsorption kinetics were best fitted with Langmuir model and pseudo-second-order rate equation, respectively. The adsorption capacity of the three adsorbents was 15.28, 15.70 and 14.17 mg/g, respectively. And the same functional group has little influence on the boron adsorption capacity of different carrier adsorbents of the same type (organosilicon material). These adsorbents have highly selective adsorption of boron, and maintain good lifetime after adsorption–desorption for 5 times, and the dissolution loss rate of SBA-16-TRIS after ten cycles was 0.93%.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
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
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2020
·Vol. 147
·期 1
·04020142
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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
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 83
·期 9
·2192-2206
·
IF 1.915
Pu Yanghao,Xie Zhengfeng,Ye Hao,Shi Wei
Modifying environmentally harmful waste polystyrene foam as an efficient recyclable adsorbent for organic dyes is important. Amidation modified polystyrene (PS-SD) was prepared by the Friedel-Crafts reaction and N,N'-dicyclohexylcarbodiimide (DCC) dehydration condensation reaction of waste polystyrene foam. PS-SD had highly efficient removal performance for organic dyes in large volume water sample solutions, and equilibrium was achieved in 0.5 h. The maximum adsorption capacities for Methylene blue (MB) and Congo red (CR) were 881.62 and 1,880.91 mg/g, respectively, at room temperature according to the Langmuir adsorption isotherm (R 2 > 0.99). The kinetic data of the two dyes followed pseudo-second-order kinetics. The removal percentage remained high (>85%) after eight filtration-regeneration cycles. Experimental results showed that PS-SD was an excellent adsorbent for water treatment with high recyclability and long life. Modification of waste materials. The reusability, and high adsorption capacity of amidated PS-SD. High value-added products, which can be used for wastewater treatment.
研究领域:
环境科学
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高分子化学
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水处理技术
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吸附材料
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废弃物资源化利用
✓ 已验证
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2025
·Vol. 48
·期 7
·e70219
·
IF 2.8
Xiao-Bei Huang,Yong-Ming Wei,Lin Yu,Zhen-Liang Xu,Hu Yang
Immobilized metal affinity chromatography is a green method applied to the separation and purification of proteins and biomolecules in downstream processing. With its unique internal pores, the membrane carriers have more active sites than typical magnetic nanoparticles and beads. It also greatly overcomes the mass-transfer resistance brought by traditional column chromatography. In this study, polysulfone was selected as the pristine membrane. Tannic acid and 3-aminopropyltriethoxysilane coatings were employed to construct the secondary reaction platform, which was then covalently coupled with polyethyleneimine and grafted with iminodiacetic acid groups to chelate Cu 2+ . Bovine serum albumin was utilized as the adsorption protein to adjust and optimize the modification parameters. The results demonstrated that the adsorption amount per unit membrane area reached 0.19 mg/cm 2 under the solution condition of pH 8.5. The adsorption thermodynamics followed the Langmuir model, and the corresponding model parameters were obtained.
研究领域:
生物技术
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生物化学
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材料科学
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分析化学
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分离科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 3.8
Xinyue Nian,Feifei Zhang,Jie Liu,Jianan Song
To address the environmental issues caused by the accumulation of large amounts of animal hair generated during the leather production process, this study mechanically milled cattle hair waste (CHW) into ultrafine cattle hair powder (UCP), and a magnetic cattle hair powder adsorbent material (MUCP) was synthesized through an in-situ generation method using FeSO 4 ·7 H 2 O and FeCl 3 ·6 H 2 O as sources. Adsorption experiments were conducted under various conditions to investigate the adsorption performance of MUCP for acid dye. The results showed that lower pH levels led to higher dye removal rates. When the pH was 2, the dye removal rate reached 93.1 %. The adsorption process was consistent with the pseudo-second-order kinetics model and the Langmuir isotherm model. When 0.1 g of MUCP-8 was used to adsorb the dye solution with an initial concentration of 500 mg·L −1 , pH 3, 45 ℃, and a duration time of 48 h, the maximum adsorption capacity was 699.30 mg·g −1 . The adsorption mechanism of MUCP for acid dye mainly involved void filling, hydrogen bonding, and electrostatic attraction between protonated amino groups and negatively charged dye ions. MUCP has superparamagnetic properties, allowing easy and quick separation and recovery from the mixed solution under an external magnetic field after dye adsorption. This provides a new solution for bio-based adsorbent materials with magnetic properties in dye wastewater treatment and waste-to-resource methods.
研究领域:
环境科学
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材料工程
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化学工程
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纳米技术
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废弃物管理
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Heng Li,Kaisheng Gong,Xiaoying Jin,Gary Owens,Zuliang Chen
Since antimony (Sb) is a toxic metalloid cost-effective method for the simultaneous removal of the two major Sb species from mining wastewater has attracted much attention. In this study, phytosynthesized iron nanoparticles ( n Fe) prepared using a eucalyptus leaf extract were successfully used to simultaneously remove Sb(III) and Sb(V) via an adsorption and oxidation mechanism with removal efficiencies of 100 and 97.7% for Sb(III) and Sb(V), respectively. Advanced analysis using X-ray photoelectron spectroscopy (XPS), ion chromatography-atomic fluorescence spectroscopy (IC-AFS), and electrochemical analysis confirmed that Sb(III) was oxidized to Sb(V) by Fe(III) on the n Fe surface while Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) indicated that both Sb(III) and Sb(V) were adsorbed onto n Fe. Adsorption of both Sb(III) and Sb(V) best fit the Langmuir adsorption model with R 2 of 0.999 and 0.989, respectively and both followed pseudo-second-order kinetics with R 2 of 0.999 and 0.981, respectively. Furthermore, the adsorption rate of Sb(III) was faster than that of Sb(V) due to inner-sphere complex formation, and the Fe–O bonds in the asymmetric tetrahedron structure of Sb(III) were easier to break due to a lower energy barrier (0.863 eV). Consequently, a simultaneous removal mechanism of Sb(III) and Sb(V) was proposed. Finally, n Fe was used practically to remove Sb in mining wastewater with a removal efficiency of 93.5%, demonstrating that n Fe have significant potential to remove Sb in contaminated mining wastewaters.
研究领域:
环境科学
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纳米技术
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水处理
·
材料科学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 5
·1713-1725
·
IF 2.2
Tan Lei,Bai Xiuzhi,Yao Rui,Fu Zengjin,Wang Jing,Wang Yicheng,Lin Tingrui,Hao Yan,Yang Hui,Yang Huimin,Sai Huazheng
The biodegradable biomass adsorbent (cellulose- g -PSS) was synthesized in LiCl/ N, N -dimethyl acetamide by the free-radical grafting polymerization reaction between sodium styrene sulfonate (SSS) and cellulose. Systematic optimization was conducted on many reaction parameters, including reaction time, monomer dosage, and reaction temperature. The grafting yield of cellulose- g -PSS was 50.16%. The chemical structures, physical, and chemical characteristics of cellulose- g -PSS were characterized by FTIR, SEM, PZC, 1 H NMR, XRD, TGA and XPS. An assessment was conducted to determine the sorption of Ce (III) on cellulose- g -PSS by changing the contact time, adsorbent dosage, pH, initial Ce (III) concentration, and NaCl concentration. The process of adsorption rapidly reached a state of equilibrium within a time frame of 25 min and was well explained using pseudo-second-order kinetic and Langmuir isotherm model. The maximum adsorption capacity for Ce (III) obtained from the Langmuir isotherm model was 84.80 mg·g −1 . The impact of NaCl concentration on the sorption of Ce (III) and XPS analysis showed that Ce (III) ions were adsorbed onto cellulose- g -PSS through ion-exchange mechanism. As a whole, cellulose- g -PSS exhibited great potential in rare earth wastewater treatment.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
BMC Chemistry
·
2023
·Vol. 17
·期 1
·1-14
·
IF 4.6
Wei Jia,Yan Luchun,Zhang Zhifang,Hu Bing,Gui Wenjun,Cui Yanjun
Acid red 73 is an azo dye, and its residue can pollute the environment and seriously threaten human health and life. In this study, glutaraldehyde was used as the crosslinking agent, chitosan and polyvinyl alcohol were crosslinked under appropriate conditions to obtain a chitosan hydrogel film, and carbon nanotubes were dispersed in the chitosan hydrogel film. The FTIR, XRD, BET, SEM were applied to chatacterize the structure and the morphology of the absorbent and results showed that when the mass fraction of the carbon nanotubes was 1%, the structure was a three-dimensional network with microporous, and the water absorption reached to the maximum value of 266.07% and the elongation at break reached to a maximum of 98.87%. The ability to remove acid red 73 from aqueous and soil environments was evaluated by UV. In the aqueous samples, 70 mg of the adsorbent reached a saturated adsorption capacity of 101.07 mg/g and a removal rate of 92.23% at pH = 5. The thermodynamics conformed with the Langmuir adsorption isotherm and pseudo second-order adsorption kinetic models. In the soil samples, 100 mg of the adsorbent reached an adsorption capacity of 24.73 mg/g and removal rate of 49.45%. When the pH of the soil is between 4 and 7, the removal rate and adsorption capacity do not change much; hence, the pH should be maintained between 5.2 and 6.8, which is extremely suitable for the growth of general plants. Moreover, the experimental results demonstrated that the adsorbent maintained a good removal rate of acid red 73 over six adsorption cycles. Graphical
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
·
土壤修复
·
高分子科学
·
分析化学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 6
·1114-1129
·
IF 1.638
Wang Jun,Xie Qinglong,Li Ao,Liu Xuejun,Yu Fengwen,Ji Jianbing
In this study, an efficient route to synthesizing polyethyleneimine-modified ultrasonic-assisted acid hydrochar (PEI-USAH) is developed and reported. Ultrasonic irradiation technique was used as surface modification method to shorten the crosslinking reaction for hydrochar and polyethyleneimine (PEI). The PEI-USAH showed an excellent adsorption capacity for Cr(VI) from aqueous solution. The physicochemical properties of this PEI-modified adsorbent were comparatively characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller analysis and CNHS analysis. The effects of contact time, initial pH, and biosorbent dose on adsorption capacities were investigated. The batch adsorption experiments showed that PEI-USAH possessed the maximum adsorption capacities of 94.38 mg/g and 330.84 mg/g for initial Cr(VI) concentration of 100 mg/L and 500 mg/L, respectively. Furthermore, this adsorption process could be fitted to Langmuir adsorption and described by the pseudo second order kinetic model. Based on the above findings, PEI-USAH could be used as a potential adsorbent for removal of Cr(VI) from wastewater.
研究领域:
环境科学
·
化学工程
·
材料科学
·
分析化学
·
水处理技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）