SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Tingting Deng,Lina Lv,Xiaoyu Li,Jun Wen,Hao Li,Hao Peng,He Chen,Chang Liu,Lianggui Bao,Caiping Dang,Yihao You,Fangting Chi
Uranium extraction from seawater plays a key role in redefining the declining uranium reserves to afford sustainable nuclear power. However, it is an urgent need to develop adsorbents simultaneously possessing enhanced efficiency, collect ability, salt resistance, antibacterial properties and economy to massively extract uranium from seawater. Herein, aminomethanesulfonic acid grafted polyamidoxime fibers (PAO-AMS-A) with hydrophilicity, salt resistance and antibacterial properties were prepared. The resulting fibers display high salt resistance and high uranium uptake capacity, providing the fibers a very high adsorption efficiency of 554.09 mg g −1 in pure uranium solution, 205.43 mg g −1 and 473.44 mg g −1 in 8 ppm and 20 ppm uranium spiked seawater and 10.04 mg g −1 in real seawater, respectively. Furthermore, the material exhibited good salt tolerance, and the uranium adsorption capacity was still as high as 597.97 mg g −1 in high concentrations of NaCl solution. Note that PAO-AMS-A has also good antibacterial activity, the antibacterial rate against bacteriais cultured in seawater is up to 93.49 %. Overall, PAO-AMS-A fibers are promising in industrial uranium extraction from seawater due to their high adsorption efficiency, salt resistance and antimicrobial properties.
研究领域:
材料科学
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环境科学
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核能工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Shanling Lu,Yuehan Qian,Yuemin Zhou,He Liu,Xu Xu,Fuhao Dong
Rosin, with a rigid hydrogenated phenanthrene ring, is a widely available biomass, but its high-value utilization needs to be enhanced. Inspired by sustainable development strategies, the design of polymer elastomers with a room-temperature self-healing capability has been a hot focus topic. However, designing elastomers that combine the conflicting properties of high mechanical performance and room-temperature self-healing is a significant challenge. The hydrogenated phenanthrene ring of rosin provides a superior solution to this problem. In this work, the polyurethane elastomer (BPU-X% AP) based on rosin-hydrogenated phenanthrene ring structure, dynamic oxime, and hydrogen bonding was reported. The BPU-X% AP exhibits high tensile strength (37.8 MPa), and good toughness (126.9 MJ m–3). Due to the rosin structure that promotes the movement of the elastomer chain segments, the elastomers have fast room-temperature self-healing and recyclability. Benefiting from their excellent mechanical strength and self-healing properties, BPU-X% AP as adhesives exhibits a strong lap shear strength of 5.5 MPa, and they can be used as hot melt binders. Corresponding to the cycling of the elastomer, the adhesive strength of BPU-10% AP remains almost the same after three cycles of adhesion to the iron and aluminum plates. This work provides a viable approach for the preparation of high-performance biomodified polyurethanes.
研究领域:
材料科学
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可持续发展
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生物质利用
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Fan Wu,Abdul Haleem,Mohib Ullah,Li Chen,Hao Li,Jianming Pan
Recovering precious metals such as palladium from secondary resources faces significant challenges, including the scarcity of efficient adsorbents capable of withstanding harsh acidic conditions and needing materials with high selectivity, mechanical stability, and scalability. In response to these challenges, we developed highly porous cryogels functionalized with sulfonic and amidoxime groups, achieving a unique combination of hydrophilicity, flexibility, and selectivity for Pd(II) ions. Using a redox cryopolymerization method, these cryogels attained a gel fraction of 100 % and a maximum adsorption capacity of 425.3 mg g −1 at 318 K, as the Langmuir isotherm model fitted. This work also combined 3D printing technology with cryopolymerization to create a highly selective, high mechanical strength and customizable shape adsorption material, overcoming traditional adsorption materials' limitations in acid conditions. This innovative combination fills the gap in selective palladium recovery in customizable super macroporous materials, offering a sustainable solution for precious metal recovery and setting a foundation for broader applications in adsorption separation.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
International Journal of Minerals Metallurgy and Materials
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2024
·Vol. 31
·期 4
·665-677
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IF 5.6
Mweene Levie,Hong Gilsang,Jeong Hee-Eun,Kang Hee-won,Kim Hyunjung
Comparative experiments and theoretical analysis of the surface chemistry changes of goethite (GT) and goethite containing Ni (GTN) in the lattice in the presence of salicylhydroxamic acid (SA) were performed. It was revealed that in the presence of 100 g·t −1 of SA, the flotation recovery of GTN and GT increased with increasing pH, achieving a maximum recovery of 98.9% for both minerals at pH 8.3 and decreasing beyond that pH, with GTN having a slightly higher recovery than GT, except at pH 8.3. This was further confirmed by the higher complexation energies of GTN⋯SA (−883.87 kJ·mol −1 ) compared with GT⋯SA (−604.23 kJ·mol −1 ) resulting from covalent, closed-shell, and conventional hydrogen bonding. The higher adsorption of SA onto GTN relative to GT was due to the formation of a π-hole in GTN, thereby promoting a higher interaction of the collector with the mineral. Thus, the presence of Ni in the GT lattice improves and decreases the adsorption and desorption of SA onto and from the mineral, respectively, compared with those onto and from GT.
研究领域:
矿物学
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理论化学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2018
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IF 2.746
Jiashuai Yan,Ye Li,Haorui Li,Yuzhi Zhou,Huafeng Xiao,Bolin Li,Xiao Ma
In this study, Zeolite X was prepared by hydrothermal method , and the amidoxime group was loaded on the zeolite X to prepare amidoxime-modified zeolite X. The effective removal of ruthenium by amidoxime-modified zeolite X in simulated wastewater was investigated. The raw and modified zeolite X were characterized systematically using the BET method, the SEM, the FTIR, the XRD and the XPS to understand the physicochemical changes of the materials, and its sensitivity to Ru 3+ adsorption. Batch adsorption experiments were carried out to investigate the effects of adsorbent dose, contact time, solution pH, different initial Ru 3+ concentrations, temperature and the effect of competitive ions on Ru 3+ adsorption. The modified zeolite X exhibited fast removal performance reaching equilibrium within 30 min at the pH of 3, and the maximum adsorption capacity was found to be 175.4 mg/g. The XRD patterns demonstrated that the modified adsorbent still has the characteristic peak of zeolite NaX, and from the SEM, it can be seen that the modified adsorbent shown the same regular octahedral crystal structure as the zeolite X. In addition, the characterization result of FTIR and XPS indicated the amidoxime group was successfully loaded onto zeolite X. Kinetic parameters were fitted by the pseudo-second order model (R 2 = 0.9999), and the adsorption process by the modified zeolite X was chemical adsorption. The adsorption isotherms data of modified zeolite X were well-fitted to the Langmuir (R 2 = 0.9834).In the competitive ions effect, the modified zeolite X effectively captured the Ru 3+ ion in the presence of Na + and K + . Therefore, the amidoxime-modified zeolite X could be effectively used as a potential adsorbent for Ru 3+ adsorption from wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
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2020
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IF 3.795
Yang Cao,Xian Xie,Xiong Tong,Dongxia Feng,Jinfang Lv,Yumeng Chen,Qiang Song
This paper systematically analyzed the effects of Fe(II) ions on the cassiterite surface to promote the adsorption of salicylhydroxamic acid (SHA). The interaction behavior and mechanisms re investigated using micro-flotation experiments, adsorption experiments, zeta potential measurements, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The micro-flotation tests revealed that the Fe(II) ions had a strong activation effect on the cassiterite, and the recovery reached the maximum at pH values of 7–8. The results of the adsorption experiment showed that the adsorption capacity of SHA on the mineral surface significantly improved after Fe (II) ion activation; this result was confirmed by the zeta potential test. In addition, the zeta potential results indicated that the positively charged Fe species absorbed on the cassiterite surface led to positive changes in the mineral surface potential and an increase in the number of active sites, thereby increasing the SHA adsorption. The XPS and FTIR results demonstrated that the Fe(II) ions activated the cassiterite through the interaction of terminal oxygen atoms with Fe species on the cassiterite surfaces, and redox reactions and displacement reactions occurred between Fe 2+ and Sn 4+ . SHA was chemisorbed on the cassiterite surface, allowing the anions to react readily with the Fe species to form Fe-SHA complexes. Therefore, the Fe(II) ion-activated cassiterite surfaces enhanced the strength and stability of the SHA chemisorption. Based on the results, an adsorption model of the Fe(II) ion-activated cassiterite surface in the SHA system was established.
研究领域:
矿物学
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界面化学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2020
·Vol. 327
·期 1
·39-47
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IF 1.137
Liu Peng,Yu Qiang,Zhang Xu,Chen Jiaqi,Xue Yun,Ma Fuqiu
Amidoxime (AO) based adsorbents have been proposed as low cost and efficient adsorbent for U(VI). Herein, we present a simple strategy for preparing AO modified artificial zeolite. The composition and morphology of the materials have been confirmed via XRD, FT-IR, TGA and SEM. The AO-artificial zeolite was synthesised as an efficient adsorbent for adsorbing U(VI). The critical factors affecting U(VI) adsorption from aqueous solution were exploited, such as pH, contact time, temperature and adsorbent dosage. This study reveals AO-artificial zeolite, along with a low-cost, environmentally friendly and facile synthesis, can be regarded as a promising material for uranium-containing wastewater treatment.
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
MINERALS ENGINEERING
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2021
·
IF 4.765
Xinyang Yu,Ruirui Zhang,Yuhui Zeng,Chen Cheng,Zhiqiang Huang,Jinliang Wang,Guichun He,Haolin Wang
This study presents the use of Cinnamic Hydroxamic Acid (CHA) as a novel collector of malachite. The flotation performance was evaluated by microflotation experiments. The mechanism of CHA adsorption at malachite surfaces was studied by contact angle measurements, zeta potential measurements, infrared spectroscopy (FTIR), and X-ray Photoelectron Spectroscopy (XPS). The microflotation experiments demonstrated that the CHA improved selectivity in comparison to benzohydroxamic acid (BA) during malachite flotation. Artificial mixed mineral flotation experiments verified that malachite could be separated from calcite effectively with the CHA collector. The results from contact angle measurements indicated that the hydrophobicity of the malachite surface was increased after CHA treatment. Zeta potential and infrared spectroscopy measurements implied that the adsorption of CHA at malachite. XPS analysis demonstrated that the C and N concentration on the malachite surface increased, with a concomitant decrease in Cu concentration.
研究领域:
矿物加工工程
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Zhixiao Liu,Zaixu An,Zhiming Mi,Zihan Wang,Qian Zhu,Dexing Zhang,Junman Wang,Jing Liu,Jialiang Zhang
Water pollution and scarcity have become a huge challenge to society. Hence, it is urgent to develop nanofiltration (NF) membranes with high permeance and high rejection for efficient desalination and wastewater treatment . Herein, novel NF membranes with poly (amidoxime) (PAO) as organic interlayer were prepared by the method of first coating and then interfacial polymerization (IP). The obtained NF membranes showed the regular nano-strips Turing structure and the polyamide (PA) layer thickness was as thin as 18.2 nm, which was probably attributed that the amidoxime groups significantly enhanced the surface hydrophilicity of poly (ether sulfone) (PES) support, and PAO as organic interlayer can bind with piperazine (PIP) through hydrogen bonding and Lewis acid-base interaction to reduce the diffusion rate of PIP, resulting in the unstable oil-water interface during IP reaction. As a result, the corresponding NF membrane exhibited the permeance up to 25.2 L/m 2 h bar with a rejection above 99% for Na 2 SO 4 , yielding an overall desalination performance superior to traditional NF membrane and most of NF membranes with inorganic nanomaterials as interlayer. Our work provides a simple avenue to fabricate advanced thin-film composite NF membranes with outstanding separation performance.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2016
·
IF 2.857
Qin Li,Xiaobo Huang,Shaochen Li,Jingchun Ma,Min Lv,Hui Xu
A total of 20 esters of fraxinellone C4/10-oxime were synthesized and determined by melting points, optical rotation, infrared spectra, proton nuclear magnetic resonance spectra, and high-resolution mass spectrometry spectra. Two steric configurations of compounds 7i and 8i were unambiguously confirmed by X-ray crystallography. Additionally, their pesticidal activities were assessed on two typical lepidopteran pests, Mythimna separata Walker and Plutella xylostella Linnaeus. Generally, all compounds exhibited less potent oral toxicity than toosendanin against third-instar larvae of P. xylostella. However, all compounds showed the growth inhibitory property against early third-instar larvae of M. separata. Notably, compounds 7m, 8b, 8k, 9, and 11 displayed more potent pesticidal activity than toosendanin. This demonstrated that introducing the C-4 carbonyl or oxime group on fraxinellone resulted in more promising derivatives than those bearing a C-10 carbonyl or oxime substituent.
研究领域:
植物化学
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农药科学
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有机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2016
·
IF 2.567
Zhenguo Gao,Long Li,Ying Bao,Zhao Wang,Hongxun Hao,Qiuxiang Yin,Jingkang Wang
Jellylike phase (JLP) is usually harmful to the process of crystallization. The special state of cefotaxime sodium (CTX) jellylike phase and its spontaneous transition to crystals is investigated in this paper. The crystals transformed from JLPs containing different solvents have distinct habits and forms. The solvent used in JLP formation and crystallization was very important. The results show that the polarity and hydrogen bonding ability of the solvent plays a decisive role in the JLP formation and its crystallization. Combined with Fourier transform infrared spectra, in situ Raman spectroscopy monitoring experiment indicates that the orientational hydrogen bonding between the solvent and CTX molecule facilitates the construction of the CTX crystal structure. JLP crystallization offers a new way for novel polymorph development and crystal habit modification, especially for drugs that are difficult to crystallize from solution.
研究领域:
药物化学
·
晶体学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Ying Wang,Zaiwen Lin,Jing Yu,Jiahui Zhu,Jingyuan Liu,Qi Liu,Rongrong Chen,Peili Liu,Jun Wang
Effectively extracting uranium (VI) [U(VI)] from seawater requires efficient adsorbents. Generally, there are two major factors that affect the adsorption efficiency of adsorbents, including the biofouling around the adsorbents and the relative density of adsorption active sites. To enhance the practical application value of powdered polyamidoxime-based materials, macro-braidable and hierarchical porous bamboo strips (BS) with antibacterial properties are selected to synthetize polyamidoximized bamboo strips (PAOBS) by in-situ polymerization methods. On the one hand, natural BS have a bamboo quinone structure, and their intrinsic structure is not destroyed during the reaction process, which endows PAOBS with excellent antibacterial properties. In addition, PAOBS retains the hierarchical porous structure of BS, providing channels for the adsorption process, which is beneficial to achieve the maximum utilization of adsorption active sites. On the other hand, PAOBS increases the relative density of amidoxime functional groups, and its adsorption capacity (233 mg g −1 ) is approximately 2.14 times higher than that of pure PAO at pH= 6.0, including electrostatic effect and chelation mechanism. After PAOBS is floated in the Yellow Sea Basin for 30 days, its adsorption capacity for U(VI) reaches 1.03 mg g −1 . Importantly, the addition of BS increases the coordination modes with the uranyl ion, and the single coordination mode of CH(NH 2 )= N - O H from PAO is translated to the three mixed coordination modes of CH(NH 2 )= N - O H, CH( N H 2 )=N - O H, and CH( N H 2 )=N - OH and adjacent CH( N H 2 )=N - OH from PAOBS. Construction of PAOBS plays a role in the design of novel adsorbents with high relative density of adsorption active sites and biofouling-resistant, laying the steady foundation for further realizing sustainable U(VI) extraction from seawater.
研究领域:
材料科学
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环境科学
·
海洋学
✓ 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）