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
·
环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 25
·37316-37325
·
IF 0
Liu Yanping,Wang Xiaonan,Wang Siwei
Litchi and longan pests significantly affect crop yield and quality. Chemical prevention and control are very effective for production; therefore, it is crucial to study fate assessment and appropriate field efficacy before pesticide application on crops to appropriately assess the health and ecological risks linked with these agents. This study conducted Good Agricultural Practice (GAP) field trials and laboratory experiments to elucidate the dissipation, terminal residues, and efficacy of methoxyfenozide on litchi and longan in six locations throughout China. To detect methoxyfenozide residues on litchi and longan, a QuEChERS/UPLC-MS/MS-based method was designed. The initial methoxyfenozide levels in litchi and longan ranged from 2.21–2.86 to 0.83–0.95 mg kg −1 and indicated half-lives of 5.1–5.3 and 5.3–5.7 days, respectively. After 7 days of foliage treatment, the concentrations of terminal methoxyfenozide residue were 0.78–2.61 and 0.02–1.01 mg kg −1 , which were less than the established maximum residue limit for methoxyfenozide in litchi and longan. The chronic (acceptable daily intake = 0.0055–0.0331%) dietary intake risk analysis for methoxyfenozide in longan and litchi indicated acceptable concentrations of terminal residue for the general population. Methoxyfenozide in litchi and longan was readily degraded in first-order kinetics models, the degradation rate on longan was higher than that on litchi, and their dietary risks were negligible to consumers. Two hundred forty grams per liter of methoxyfenozide suspension concentrate (SC) represents a highly efficacious insecticidal dose to control litchi and longan pests and indicates a significant application potential as it is rapidly degraded and linked with reduced post-treatment residue levels.
研究领域:
农业科学
·
环境科学
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产品关联
DOI
PubMed
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Wenjie Wang,Muhammad Adeel Ghafar,Lu Liuyang,Inzamam Ul Haq,Li Cui,Huizhu Yuan,Liande Wang
RNA pesticides have emerged as a promising alternative to conventional chemical pesticides due to their high specificity and minimal environmental impact. However, the instability of RNA molecules in the environment and the challenges associated with their effective delivery to target pests limit their broader application. This study addresses these challenges by developing a dual delivery system using chitosan (CS) and Metal–Organic Frameworks (MOFs) to enhance the delivery and efficacy of double-stranded RNA (dsRNA) and cycloxaprid against Diaphorina citri, a vector of citrus greening disease. The CS-MOF nanoparticles were synthesized and characterized using scanning electron microscopy (SEM) and dynamic light scattering (DLS). Insect bioassays demonstrated that the codelivery system significantly improved insecticidal activity, achieving over 80% mortality in D. citri within 2 days. The results indicate that the encapsulation of dsRNA within MOFs enhances its stability, while the controlled release properties of the nanoparticles improve the efficacy of cycloxaprid. This novel approach shows great potential in overcoming the limitations of RNA pesticides and offers a sustainable solution for pest management in agriculture. Future research should optimize the delivery system, conduct field trials, and explore its applicability to other agricultural pests.
研究领域:
农业科学
·
分子生物学
·
农药科学
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产品关联
DOI
PubMed
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
·
化学工程
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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
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ying Wang,Zaiwen Lin,Qi Liu,Jiahui Zhu,Jingyuan Liu,Jing Yu,Rongrong Chen,Peili Liu,Jun Wang
The uranium(VI) (U(VI)) extraction from seawater was crucial for future energy problems such as increasingly depleted fossil fuels and serious environmental pollution , and it could improve the current situation of limited U(VI) reserves on land. In this study, the natural material bamboo strips (BS) were utilized due to the flexibility and richness of various functional groups, and the amidoximized bamboo strips (AOBS) could be directly prepared by a simple one-step method. The amidoximation of materials not only adjusted the optimal adsorption pH from 4 to 6, but also advanced the hydrophilicity, speeded up the reaction rate (adsorption equilibrium within 1 h, about 0.17 times of BS), and increased the adsorption capacity (q e = 268.41 mg g −1 at pH = 6, about 1.7 times of BS). Importantly, the AOBS maintained its initial stitchability through flexibility adjustment, and was woven into a macro-shaped adsorbent (AOBS-M). After being placed in the Yellow Sea basin for 30 days, approximately 44.75 g of crude U(VI) (U(VI) content = 40.45 mg) was obtained (q e = 0.97 mg g −1 ), and it showed the excellent selectivity for U(VI). The AOBS-M not only overcame the problem that the existing adsorption materials were difficult to achieve macroscopic large-area molding, but also realized the flexibility adjustment during the modification process by controlling the reaction conditions, and promoted the industrial development of U(VI) extraction from seawater.
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
FIBERS AND POLYMERS
·
2017
·Vol. 18
·期 5
·817-824
·
IF 1.113
Ma Xuebin,Xu Tingting,Chen Wei,Wang Rui,Xu Zheng,Ye Zhiwen,Chi Bo
New applications call for many new requirements. In order to improve the toughness of aldehyde hyaluronic acid (A-HA) and adipic acid dihydrazide (ADH) hydrogel, the poly(ethylene glycol) (PEG) was added. PEG content and molecular weight have little effect on the gelation time, and the composite hydrogels can form in situ within 20 seconds at room temperature. The press test showed that the hydrogels containing PEG possessed a better compression resistance, after pressed more than five times, the composite hydrogels could restore. Rheological properties were measured to evaluate the working ability and the effect of PEG on hydrogels. By analyzing the shear viscosity ( η
γ=0.01 ), yield stress ( σ
0 ) and threshold shear stress ( σ
c
), the addition of PEG can make the structure of composite hydrogels get loose and improve the shear resistance. Especially, PEG800 can enhance the antishear ability obviously. The amplitude sweep tests showed a broad linear viscoelastic region, indicating a wide processing range. In the meanwhile, we also found that PEG can improve the optical transmittance of xerogel evidently.
研究领域:
生物材料学
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医学工程
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiaohan Niu,Mengting Li,Chunjia Luo,Min Chao,Xushuai Chen,Luke Yan
The complex composition of actual industrial wastewater requires membrane separation technologies that can treat multiple contaminants simultaneously. However, currently designed multifunctional separation membranes do not combine the recovery of the rare resource of precious metal ions. In this paper, the carbon nanotubes grafted with polyacrylhydrazide (CNTs-PAH) and Ti 3 C 2 T x MXene nanosheets were synergistically constructed as CNTs-PAH/MXene membranes. The membrane is initially capable of efficiently separating five kinds of water-in-oil (W/O) emulsions, and the separation efficiencies are all higher than 96 %. Moreover, the membrane can accurately and selectively recover precious metal ions from C/W emulsions, with maximum absorption capacities of 527 mg g −1 , 631 mg g −1 and 464 mg g −1 for Ag, Au and Pd, respectively. The post-recovery membrane precious metal ions can be further used to catalyze methylene blue and p-nitrophenol with catalytic efficiency above 95 %. The composite membrane has good structural stability and efficiency retention during cyclic separation. In addition, the regenerated silver nanoparticle composite membranes showed an inhibition rate of 88.97 ± 0.37 % against Staphylococcus aureus. This work introduces a fresh strategy to construct a long-lasting multifunctional separation membranes with simultaneous precious metal ion recovery.
研究领域:
材料科学
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环境工程
·
化学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
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
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DOI
高影响因子
TETRAHEDRON LETTERS
·
2020
·
IF 2.275
Haibo Zhu,Yingying Zhang,Yishuai Liu,Liu Yang,Zongbo Xie,Guofang Jiang,Zhang-Gao Le
A practical and efficient approach adopting transition-metal-free cross-coupling of sulfonyl hydrazides with benzyl ammonium salts has been developed to synthesize benzyl sulfones using Cs 2 CO 3 as base under mild conditions. The protocol employs stable and easy to handle coupling partners, and is endowed with good substrate compatibility, leading to functional benzyl sulfones in good yields.
研究领域:
有机化学
·
合成化学
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产品关联
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
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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
·
材料科学
·
放射性污染治理
✓ 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）