JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Lien Zhu,Chunhong Zhang,Feifan Qin,Fuqiu Ma,Changlong Bi,Ruiqi Zhu,Lijia Liu,Jianwei Bai,Hongxing Dong,Toshifumi Satoh
To efficiently and economically extract uranium from seawater, novel amidoxime-modified hypercrosslinked poly(styrene-co-acrylonitrile) (SAN) adsorbents with tunable porous structure were synthesized via simple Friedel-Crafts reaction followed by amidoximation. The adsorbent HCPSAN-B-AO obtained by using biphenyl dichlorobenzyl (BCMBP) as an additional crosslinking agent, possessed a larger pore size and higher surface area due to the longer and more rigid molecular structure of BCMBP compared to the original crosslinking agent 1,2-dichloroethane (DCE), resulting in the higher uranium adsorption capacity of HCPSAN-B-AO. Investigations on the adsorption performance in real seawater containing a large amount of interfering ions showed that the adsorbent owned excellent selectivity for uranyl ions, and the removal percentage of uranium could reach 84.4%. Furthermore, the adsorbent maintained good adsorption performance even after 5 adsorption–desorption cycles, indicating a good recyclability. Investigations on adsorption kinetics, thermodynamics, adsorption isotherms and adsorption mechanism manifested that the adsorption was a rapid (adsorption equilibrium within 30 min), spontaneous and chemical adsorption process (maximum adsorption capacity was 228 mg g −1 ), and the mechanism was mainly the interaction between uranyl ions and amidoxime groups. In summary, the as-prepared adsorbent was a feasible adsorbent for uranium extraction from seawater.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Donghua Jin,Ying Wang,Dalei Song,Jiahui Zhu,Jing Yu,Qi Liu,Jingyuan Liu,Rumin Li,Peili Liu,Jun Wang
Uranium adsorption from seawater can provide a sustainable development path for the future raw material supply of nuclear energy. However, in the process of uranium extraction from seawater, biofouling adheres to the surface of the adsorbent, wasting the adsorption sites and seriously affecting the adsorption capability of the adsorbent. Herein, inspired by the superanti-biofouling property of guanidine groups, a superantibacterial and knitted adsorbent with guanidine and amidoxime groups cografted on natural bamboo strips (G-AOBS) is synthesized to adsorb uranium from simulated seawater. The intrinsic structure of bamboo is not destroyed by the whole grafting process, and G-AOBS still maintains the porous and cellulose crystalline structure. The grafting of guanidine groups improves the hydrophilicity and significantly enhances the anti-biofouling performance, thereby increasing the adsorption capacity for uranium (q e = 201.4 ± 13.23 mg g −1 at pH = 4 with C 0 = 100 mg L −1 and q e = 1.04 ± 0.12 mg g −1 in simulated seawater with C 0 = 500 μg L −1 ). According to the results of DFT, the guanidine and amidoxime groups can not only replace one carbonate in uranyl tricarbonate alone to form a more stable coordination structure but also have a synergistic effect between the two, that is, using three “bridging hydrogen bonds” to form the most stable chelation mode with uranyl dicarbonate.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
RADIOCHIMICA ACTA
·
2022
·Vol. 110
·期 5
·311-322
·
IF 2.083
Yun Zhou,Huai-Xin Hao,Tian-Hao Dong,Xu-Feng Ni,Yi-Chen Hu,Jia-Ju Ma,Jun-Qiang Yang,Ke-Liang Shi,Guo-Jian Duan,Tong-Huan Liu
With the rapid development of nuclear energy, how to safely and efficiently dispose of radioactive waste solution has become an urgent environmental problem of public concern. It is of great significance to construct a new type of high-efficiency adsorbent material to recover uranium from nuclear waste solution. In this work, the Ti 3 C 2 T x material (an emerging two-dimensional inorganic layered material) with a stable layered structure was used as the matrix, and the amidoxime functionalized MXene composite material (PAO/Ti 3 C 2 T x ) was synthesized by in-situ polymerization. The amidoxime-functionalized Ti 3 C 2 T x showed excellent capacity to capture U(VI), with a maximum adsorption capacity of 98.04 mg/g at 25 °C, which was significantly better than that of Ti 3 C 2 T x , and the adsorption selectivity for U(VI) was greatly improved. The adsorption was conformed to Langmuir isotherm model and pseudo-second-order kinetic model. In addition, the adsorbed UO22+ could be effectively desorbed by 0.1 M HNO3, and the adsorption performance of PAO/Ti 3 C 2 T x did not decrease significantly after 5 adsorption/desorption cycles. The results of ionic strength experiment, FT-IR, SEM, and XPS jointly indicated that adsorption mechanism of U(VI) on PAO/Ti 3 C 2 T x was the combined effect of the amidoxime group and -O and -OH active groups on the surface of Ti 3 C 2 T x , mainly inner complexation. These advantages make PAO/Ti 3 C 2 T x composite a highly potential U(VI) adsorbent with great application prospects.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
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IF 2.843
Xin Lu,Dongxiang Zhang,Alemtsehay Tesfay Reda,Cong Liu,Zhi Yang,Shuaishuai Guo,Songtao Xiao,Yinggen Ouyang
A novel fibrous sorbent, amidoxime-grafted activated carbon fibers (ACFs-AO), was prepared using a chemical grafting method and tested for the efficient removal of uranium from aqueous solution. The sorbent was characterized using X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, elemental analysis, thermogravimetric analysis, and Brunauer–Emmett–Teller. The effects of pH, contact time, initial concentration, and temperature on the sorption of U(VI) were investigated. The sorption of U(VI) on ACFs-AO obeyed the pseudo-second-order model and Langmuir isotherm. The sorption capacity of ACFs-AO for U(VI) (about 191.6 mg/g) was much higher than that of activated carbon fibers (ACFs) (about 70.52 mg/g), which was mainly attributed to surface complexation between U(VI) and the amidoxime group on ACFs-AO. Additionally, the thermodynamic parameter results showed that the sorption process of U(VI) was spontaneous, feasible, and endothermic. Moreover, ACFs-AO adsorbed U(VI) selectively in an aqueous solution containing competitive ions, and was regenerated and reused efficiently. The findings of this work indicate that ACFs-AO could be a promising sorbent for the effective removal of U(VI) from aqueous solution.
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
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Zhijun Liu,Guoming Yuan,Wenjie Diao,Yaodong Zhang,Enxiang Jiao,Jun Shi,Kun Wu
It is a challenge to develop polyurethane pressure-sensitive adhesive (PU-PSA) simultaneously with good cohesion and adhesion properties. Inspired by the structure of multiple hydrogen bonds in spider silk, we introduced Acylsemicarbazide (ASCZ) moiety that can form multiple hydrogen bonds in the polymer network into PU-PSA. The characteristic absorption peaks of ester groups at 1600–1780 cm −1 were analyzed in FTIR testing, and the results showed that ASCZ formed multiple hydrogen bonds in PU-PSA, and the hydrogen bond content increased with the increase of ASCZ content. In particular, PUA-AD20% with 24.3 % hydrogen bond content showed higher shear strength (0.51 MPa) and debonding energy (3.3 KJ m −2 ). Rheological tests showed that PU-PSA storage modulus and loss modulus increased with increasing frequency, which was highly frequency dependent. Therefore, as dynamic and reversible sacrificial bonds, hydrogen bonds can dissipate energy efficiently and resist external forces. In addition, the ASCZ component also provided PU-PSA with the polar groups required for adhesion. Therefore, PUA-AD20% had excellent adhesion properties. Compared to PUA, PUA-AD20% tack and peel strength increased by 36.1 % and 146.8 %, with values of 4.9 N and 11.6 N, respectively. In summary, this work offered a simple and versatile approach to designing PU-PSA with outstanding overall performance.
研究领域:
材料科学
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yu Liu,Qiuhui Deng,Yao Yu,Hong Chen,Chunlin Liu,Le Li,Qingyun Cai,Deshuai Zhen
Efficient enrichment and recycling of uranyl ion (UO 2 2+ ) from wastewater are crucial for preventing radioactive contamination and protecting human health. Herein, two novel covalent organic frameworks (Tp-PDAN and Tp-PDAN-AO) were synthesized by a simple two-step method. Tp-PDAN-AO exhibits excellent hydrophilicity, thermal stability, and chemical stability, making it suitable for UO 2 2+ removal from acidic wastewater. The high-density amidoxime chelate groups in Tp-PDAN-AO confer high adsorption capacity and selectivity for UO 2 2+ , with a maximum adsorption capacity of 565.30 mg g −1 , reaching equilibrium within 2 h. Additionally, Tp-PDAN-AO exhibits strong photocatalytic activity under UV irradiation, which further enhances U(VI) reduction, boosting both adsorption kinetics and capacity. The maximum adsorption capacity increases to 757.62 mg g −1 with photocatalytic reduction. Density functional theory (DFT) calculations reveal six distinct COF-U(VI) interaction modes, explaining the chelation mechanism between hydrated uranyl ions and Tp-PDAN-AO (ƞ 2 mode), providing insights into the application of COFs with customizable functional groups for UO 2 2+ adsorption.
研究领域:
环境科学
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材料科学
·
放射性污染治理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Xiaoxia Ye,Ruiyang Chi,Zhihao Wu,Jinteng Chen,Yuancai Lv,Chunxiang Lin,Yifan Liu,Wei Luo
There are approximately 4 billion tons of uranium in the ocean, which is unmatched by the surface. Nevertheless, it's very challenging to extract uranium from the ocean due to the exceedingly low concentration of uranium in the ocean (about 3.3 μg L −1 ) as well as high salinity level. Current methods are often limited by selectivity , sustainability, economics, etc. Herein, phosphoric acid group and amidoxime group were grafted to skin collagen fibers through " initiated access” to design a new uranium extraction material, abbreviated as CGPA. Through laboratory simulation experiments, it is concluded that the maximum adsorption capacity of CGPA for uranium reaches 263.86 mg g −1 . It has high adsorption, selectivity, and reusability for uranium. In the actual seawater extraction experiment, CGPA obtained 29.64 μg of uranium after extracting 10.0 L of seawater, and the extraction rate was 90.1%. The adsorbent has excellent effects in kinetics, selectivity, extraction capacity, renewability, etc. In the extraction of uranium from seawater, and is an economically feasible and industrially expandable adsorbent.
研究领域:
材料科学
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环境科学
·
海洋资源开发
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ningning He,Hao Li,Chong Cheng,Hao Dong,Xirui Lu,Jun Wen,Xiaolin Wang
Uranium extraction from seawater has attracted attention owing to the growing demand for nuclear energy. However, it remains challenging because of the complexities of the marine environment, such as competing metal ions , high salinity , alkaline pH (8.3), and continuous biofouling. In this study, a new hyperbranched poly(amido amine)-modified adsorbent (PAO- h -PAMAM) was prepared by a simple hydrothermal method. The synergistic effect of hyperbranched poly(amido amine) and amidoxime groups not only endows the adsorbent with good adsorption performance and selectivity towards uranium ions but also adjusts the optimal adsorption pH of amino-functionalized adsorbents to suit the marine environment. Moreover, PAO- h -PAMAM exhibits an excellent antibacterial activity (96.5%) against marine bacteria and retains its adsorption performance well in multiple adsorption-desorption cycles. In view of its good adsorption performance, excellent antibacterial activity, and marine applicability, the PAO- h -PAMAM adsorbent is a promising candidate for uranium extraction from seawater.
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
DOI
高影响因子
Chemical Engineering Journal Advances
·
2025
·
IF 7.1
Xiangwen Lv,Anruo Luo,Xiong Tong,Jianhua Chen,Sheng Jian
Copper and molybdenum, crucial strategic metals with frequent natural co-occurrence, require highly selective depressants for their flotation separation. However, diminishing ore quality and environmental constraints challenge traditional separation approaches. This study introduces novel 2-(carbamimidoylthio) acetic acid (CAA) as a green depressant for chalcopyrite in copper-molybdenum separation. Through integrated experimental analyses (microflotation, contact angle, FT-IR, TOF-SIMS, XPS) and DFT simulations, we reveal CAA's selective depression mechanism. Results demonstrate CAA significantly enhances chalcopyrite surface hydrophilicity through dual mechanisms: stable triple-bond chelate formation via electron donation from N/S atoms to Fe 3+ /Cu + ions, and hydrogen-bond induced water adsorption through acetic acid groups. Crucially, even with the use of a powerful collector, ethyxanthate, CAA maintains high molybdenite recovery (88.76 %) while effectively depressing chalcopyrite (29.12 %). The elucidated structure-function relationship of CAA's functional groups provides theoretical guidance for developing eco-friendly flotation reagents. This advancement addresses critical challenges in processing complex ores, offering environmental and economic benefits through reduced reagent consumption and improved resource utilization efficiency.
研究领域:
矿物加工工程
·
理论与应用化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiang Li,Qi Liu,Shusen Chen,Jiahui Zhu,Yan Song,Haotian Wu,Ying Li,Rongrong Chen,Jing Yu,Jingyuan Liu,Jun Wang
Nuclear energy plays a key role in the global energy supply. The adsorption and extraction of uranium from seawater is key to the rapid development of nuclear energy. In this paper, quaternary aminated polyethyleneimine/amidoxime-modified hemp fiber (HFAO-QPEI) with high adsorption capacity and anti-biofouling properties were successfully synthesized by immersion and hydrothermal methods. Upon systematic evaluation, HFAO-QPEI possessed high adsorption capacity and good reusability with fast adsorption kinetics, as well as good adsorption selectivity and affinity for uranyl ions. Furthermore, HFAO-QPEI not only reached a maximum adsorption capacity of 364.7 mg/g but also demonstrated a short adsorption equilibrium time of 200 min. In contrast, HFAO-QPEI demonstrated high selectivity for uranyl ions, removing up to 95.1 % of uranium with K d value of 4.69 × 10 4 mL/g, which was 256.3 times greater than that of hemp fiber (HF). After the fifth adsorption–desorption cycle, the recovery of U(VI) was 91.38 %. DFT calculations proved that HFAO-QPEI-U was the most stable model. The quaternary ammonium salt functionalization not only makes HFAO-QPEI have excellent anti-biofouling ability (anti-diatom rate up to 87.22 %, anti-bacterial rate up to 97 % or more, anti-adhesion of large fouling organisms mussels with a certain effect), but also modifies its surface charge, making it more suitable for the marine environment. In addition, HFAO-QPEI showed a high adsorption capacity of 2.45 mg/g in natural seawater. The results suggest that the HFAO-QPEI adsorbent holds great promise for extracting uranium from seawater.
研究领域:
材料科学
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环境科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN NUCLEAR ENERGY
·
2022
·
IF 2.461
Changlong Bi,Jinru Nian,Chunhong Zhang,Lijia Liu,Lien Zhu,Ruiqi Zhu,Qi Qi,Fuqiu Ma,Hongxing Dong,Chao Wang
In this study, a novel amidoxime functionalized graphene oxide adsorbent (GO-D-AO), based on the reaction of dopamine modified graphene oxide with acrylamide diacetonitrile and on the reaction of amidoximation, was successfully designed and prepared to effectively adsorb U(VI) ions. GO-D-AO was characterized by SEM , FT-IR, XRD and XPS techniques, and then applied as the adsorbent for the U(VI) adsorption. The GO-D-AO contained more amidoximation groups after the amidoximation modification due to the use of acrylamide diacetonitrile modifier. A series of adsorption experiments were carried out to investigate the influence factors in the adsorption process , including the pH values, contact time, temperature and initial concentration of U(VI) solution. The U(VI) maximum adsorption capacity of GO-D-AO was 1823.6 mg·g -1 , which was significantly higher than that of GO because of the excellent chelating ability of amidoxime group with U(VI) ions. And the U(VI) adsorption process of GO-D-AO fitted well with the Langmuir model and the pseudo-second-order kinetic model , indicating the adsorption process was monolayer and chemical adsorption .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Lu-Lu Yang,Xue-Wei Wei,Tianyu Wu,Hai-Mu Ye
Self-assembled nucleating agents based on hydrogen bonding interactions have been increasingly used to manipulate the crystallization behavior of polymer materials, yet the specific working mechanism is not well unrevealed. In this study, hydrazide-based nucleator structure of bis -(mono-methyl succinyl)dihydrazide (MSAD) is randomly incorporated in poly(butylene succinate) (PBS) chains to prepare a series copolymers of PBS- co -MSAD. It is confirmed that the multiple hydrogen-bonding interactions strengthen as the content of the MSAD segment increases, leading to a remarkable elevation of crystallization temperature. Meanwhile, the primary nucleation density of PBS is significantly raised without changing crystal modification. The formation of pre-ordered network of hydrogen-bonding structures during non-isothermal crystallization is confirmed by rheological measurement and Fourier transform infrared spectroscopy investigation, which immediately induces the crystallization of PBS segments once strong enough. In addition, the melt crystallization mechanism of PBS- co -MSAD with heterogeneous hydrogen-bonding segments is in detail elucidated by combining a self-nucleation protocol.
研究领域:
高分子科学
·
材料科学
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化学工程
✓ 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）