JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 4
·2195-2206
·
IF 1.5
Li Junze,Zhao Chuang,Guo Wenbin,Gao Yang,Liu Tingting,Zhou Yu,Hou Hongguo,Jiao Caishan,Zhang Meng
Using DMDODGA as the carrier, the transportation and separation behavior of Eu(III) and La(III) were studied using a plate-type supported liquid membrane. La(III) and Eu(III) reach their maximum transport rates at feed phase nitric acid concentrations of 2 and 4 mol/L, which are 72.41 (± 2.12)% and 77.80 (± 2.45)%; Increasing the concentration of NO 3 − in feed phase will promote the transport of both ions. The change of HNO 3 concentration in feed phase had major effect on the separation of Eu(III)/La(III), and the co-transport of Eu(III)/La(III) was observed when the concentration of NO 3 − was 3 mol/L.
研究领域:
化学工程
·
分离科学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Huanyong Li,Zhi Gu,Haiyang Zhang,Heqing Li,Li Fu
Three ZnE (E = Se, Te) single crystals were successfully grown directly from Zn-E (E = Se, Te) system with the assistance of I 2 or NH 4 Cl as the transport agents via a modified chemical vapor transport (CVT) method by avoiding the kinetics limitations of the congruent sublimation of ZnE compound. As-grown ZnE crystals exhibit different crystalline appearance due to various growth conditions. The structure, growth habit and morphologies of as-grown ZnE crystals are investigated by XRD , RO-XRD, SEM and optic microscope. ZnE crystals with NH 4 Cl transport agent look like the platelets with an interesting growth habit, while ZnE crystal with I 2 transport agent has high crystalline quality with a conical shape. Contrasting investigation between different growth results offers us an opportunity to understand the vapor-free-growth mechanism of ZnE crystals in closed-space CVT system, indicating that the free-growth habit of ZnE crystals depends on the growth parameters, which can be essentially attributed to their growth mechanism and the main vapor–solid reactions on the interfaces.
研究领域:
材料科学
·
晶体生长
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yi Pu,Jintu Fan
Acting as a “second skin”, clothing plays an indispensable role in providing comfort and protection in the wide range of environments in which we live. However, comfort and protection are often competing requirements and are difficult to improve simultaneously. By mimicking the exceptional thermoresponsive one-way liquid transport property of human skin, here we developed a scalable and ecofriendly skin-like fabric that has a tunable directional water transport rate while having excellent water repellency. The water transport rate is also temperature-responsive, just like skin. As the temperature increases, the wettability gradient in the spatially distributed channels (acting like “sweat glands”) increases, promoting sweat transport and evaporative heat dissipation. As the temperature decreases, on the other hand, the wettability gradient diminishes, reducing liquid transport and evaporative heat loss, thereby promoting heat retention. The fabric is highly suitable for sportswear and functional clothing and can have wider applications, such as oil–water separation, fog harvesting, etc.
研究领域:
材料科学
·
生物医学工程
·
纺织科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Xiaoying Zhang,Fangfei Cai,Funing Ma,Paul Reimus,Linlin Qi,Di Lu,Mohamad Reza Soltanian,Zhenxue Dai
Colloids play a crucial role in influencing the mobility of radionuclides in high-level radioactive waste repositories. However, the co-transport behavior of radionuclides and colloids in geological media remains insufficiently understood. This study investigated the transport of Strontium (Sr) in four types of granite minerals (quartz, biotite , K-feldspar, and plagioclase) in the presence and absence of Na-bentonite colloids (Na-BC) using column experiments. Employing a stepwise modeling strategy, this study first determined the basic flow and transport parameters through breakthrough curve analysis of the conservative tracer (Br). Then, the experimental data of Sr in the colloid-free Sr transport experiments and Na-BC in the Sr-colloid co-transport experiments were quantitatively explained using a two-site sorption model and a two kinetic sites model, respectively. Finally, the co-transport behavior of Sr and Na-BC was fitted using the colloid-facilitated solute transport model. The stepwise modeling allowed quantification of the kinetics of Sr sorption onto mobile and immobile Na-BC and highlighted the role of straining in Na-BC retention. In the absence of Na-BC, Sr transport experienced the greatest retardation in biotite, followed by plagioclase, K-feldspar, and quartz, respectively, which positively correlated with the specific surface area of the minerals. Moreover, Na-BC enhanced Sr transport with the same retardation order in all tested minerals, with recovery rate increments of 68.61%, 19.21%, 6.67%, and 4.33%, respectively. The transport of Sr in K-feldspar was found to be less affected by Na-BC compared to the other tested minerals, likely due to the strong cation exchange capacity of K + among the cation components of minerals, making hydrated K + more likely to exchange with Sr 2+ on K-feldspar surfaces. These findings hold significant implications for assessing the risks associated with the transport of radionuclides in deep geological repositories.
研究领域:
环境科学
·
放射性废物管理
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Li Li,Mingjie Xia,Lina Yang,Yutang He,He Liu,Mengxi Xie,Miao Yu
Polysaccharides impact intestinal fermentation and regulate interfacial properties which affect absorption and transportation. Short-chain fatty acids (SCFAs), the main metabolites of soy hull polysaccharide lysate, are readily absorbed by the body and perform various physiological functions. We analysed the interfacial properties and transport of soy hull polysaccharide-derived SCFAs in the Caco-2 cell model to clarify the transmembrane transport mechanism. The results showed that the interfacial properties of the co-culture system were influenced by both transit time and concentration of SCFAs, the uptake and transit rates of SCFAs at 1–3 h increased significantly with time ( P < 0.05). With increasing transit time and concentration, the transit rates of SCFAs on the apical side (AP) → basolateral side (BL) and BL → AP sides increased and then stabilised, the transit rate of the AP → BL side was higher than that of the BL → AP side. Proteomic analysis showed that soy hull polysaccharide-derived SCFAs resulted in the differential expression of 285 upregulated and 501 downregulated after translocation across Caco-2 cells. The differentially expressed proteins were mainly enriched in ribosomes, oxidative phosphorylation, nuclear transport, and SNARE vesicular transport. This study lays the theoretical foundation for understanding the structure-activity relationship of soy hull polysaccharides in the intestine.
研究领域:
营养学
·
胃肠病学
·
分子生物学
·
细胞生物学
·
蛋白质组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 30
·期 1
·1902686
·
IF 15.621
Xuan Wang,Zubin Wang,Liping Heng,Lei Jiang
Directional transportation and collection of liquids and bubbles are highly desirable in human life and industrial production. As one of the most promising types of functional surfaces, the reported anisotropic slippery liquid-infused porous surfaces (SLIPSs) demonstrate unique advantages in liquid directional transportation. However, anisotropic SLIPSs readily suffer from the depletion of lubricant when used to manipulate droplets and bubbles, which leads to unstable surface properties. Therefore, fabricating stable anisotropic slippery surfaces for the directional transportation of drops and bubbles remains a challenge. Here, stable anisotropic covalently grafted slippery surfaces are fabricated by grafting polydimethylsiloxane molecular brushes onto directional microgrooved surfaces. The fabricated surfaces show remarkable anisotropic omniphobic sliding behaviors towards droplets with different surface tensions ranging from 72.8 to 37.7 mN m −1 in air and towards bubbles underwater. Impressively, the surface maintains outstanding stability for the transportation of droplets (in air) and air bubbles (underwater) even after 240 d. Furthermore, anisotropic self-cleaning towards various dust particles in air and directional bubble collection underwater are achieved on this surface. This stable anisotropic slippery surface has great potential for applications in the directional transportation of liquids and bubbles, microfluidic devices, directional drag reduction, directional antifouling, and beyond.
研究领域:
材料科学
·
界面化学
·
功能表面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2022
·
IF 6.796
Chunfeng He,Jini Zhou,Chen Yang,Zhiyi Song,Junheng He,Ziqing Huang,Yurong Deng,Jinling Wang,Yu Xiong,Zhi Dang
Co-exposure to heavy metal and antibiotic pollution might result in complexation and synergistic interactions, affecting rice growth and further exacerbating pollutant enrichment. Therefore, our study sought to clarify the influence of different Tetracycline (TC) and Cadmium(Cd) concentration ratios (both alone and combined) on rice growth, pollutant accumulation, and transportation during the tillering stage in hydroponic system. Surprisingly, our findings indicated that the interaction between TC and Cd could alleviate the toxic effects of TC/Cd on aerial rice structures and decrease pollutant burdens during root elongation. In contrast, TC and Cd synergistically promoted the accumulation of TC/Cd in rice roots. However, their interaction increased the accumulation of TC in roots while decreasing the accumulation of Cd when the toxicant doses increased. The strong affinity of rice to Cd promoted its upward transport from the roots, whereas the toxic effects of TC reduced TC transport. Therefore, the combined toxicity of the two pollutants inhibited their upward transport. Additionally, a low concentration of TC promoted the accumulation of Cd in rice mainly in the root tip. Furthermore, a certain dose of TC promoted the upward migration of Cd from the root tip. Laser ablation-inductively coupled plasma mass spectrometry demonstrated that Cd mainly accumulated in the epidermis and stele of the root, whereas Fe mainly accumulated in the epidermis, which inhibited the absorption and accumulation of Cd by the rice roots through the generation of a Fe plaque. Our findings thus provide insights into the effects of TC and Cd co-exposure on rice growth.
研究领域:
植物学
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Science and Human Wellness
·
2024
·
IF 5.6
Wen Nie,Feiran Xu,Kai Zhou,Jieying Deng,Ying Wang,Baocai Xu
The study evaluated the stability of an oligopeptide (Lys-Arg-Gln-Lys-Tyr-Asp, KRQKYD) and its transport mechanism by simulating gastrointestinal digestion and a model of human intestinal Caco-2 monolayer cells in vitro . In this study, the effects of environmental factors (temperature, pH and NaCl concentration) and simulated gastrointestinal digestion on the stability of KRQKYD were evaluated by indicators of the levels of alanine transaminase (ALT), aspartate transaminase (AST) and malondialdehyde (MDA) in an alcohol-induced hepatocyte injury model. The results showed that KRQKYD still maintained satisfactory hepatocyte-protective activity after treatment with different temperatures (20−80 °C), pH (3.0−9.0), NaCl concentration (1 %−7 %) and simulated gastrointestinal digestion, which indicated that KRQKYD showed good stability to environmental factors and simulated gastrointestinal digestion. Furthermore, the intact KRQKYD could be absorbed in a model of Caco-2 monolayer cells with a P app value of (9.70 ± 0.53) × 10 −7 cm/s. Pretreatment with an energy inhibitor (sodium azide), a competitive peptide transporter inhibitor (Gly-Pro) and a transcytosis inhibitor wortmannin did not decrease the level of transepithelial KRQKYD transport, indicating that the transport mechanism of KRQKYD was not associated with energy dependent, vector mediated and endocytosis. The tight junction disruptor cytochalasin D significantly increased the level of transepithelial KRQKYD transport ( P < 0.05), suggesting that intact KRQKYD was absorbed by paracellular transport.
研究领域:
药理学
·
细胞生物学
·
胃肠病学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Hazardous Materials Letters
·
2023
·
IF 0
Ying Lyu,Baohua Wang,Mark L. Brusseau
The impact of chain length on the retention and transport of perfluorocarboxylic acids (PFCAs) in a quartz sand was investigated. Short-chain (C4–C7: PFBA, PFPeA, PFHxA, PFHpA) and long-chain (C8–C10: PFOA, PFNA, PFDA) PFCAs were selected as a representative homologous series. Miscible-displacement transport experiments were conducted under saturated conditions to characterize the magnitudes of sorption mediating retention and transport. Quantitative-structure/property-relationship (QSPR) analysis was applied to characterize the influence of molecular size on sorption. The transport of the long-chain PFCAs exhibited greater retardation than the short-chain PFCAs. The log of the equilibrium sorption coefficient ( K d ) exhibited a biphasic relationship with carbon number and molar volume, with the magnitude of measured sorption for the short-chain PFCAs significantly greater than would be predicted using the QSPR regression developed for the long-chain PFCAs. This is consistent with batch-measured data reported in the literature, and likely reflects the relative influence of different sorption mechanisms for the short-chain vs long-chain PFCAs.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2021
·
IF 6.789
Mengjie Wang,Qiang Zhang,Taotao Lu,Jiuyan Chen,Qiqi Wei,Weifeng Chen,Yanmei Zhou,Zhichong Qi
Given the ubiquitous mineral (e.g., clays and iron oxides) playing critical roles in impacting the fate of antibiotics in the subsurface environment, the effects of two mineral colloids (i.e., ferrihydrite and montmorillonite) on tetracycline (TC, a representative of antibiotic) transport in sand columns were investigated in this study. Interestingly, the results clearly showed that ferrihydrite colloids inhibited TC transport, while montmorillonite colloids enhanced TC mobility under neutral conditions (pH 7.0). This phenomenon resulted from the positively charged ferrihydrite colloids with weak mobility, which assisted TC deposition; besides, providing additional deposition sites for TC by the deposited ferrihydrite colloids was another important mechanism. In contrast, the transport-enhancement effect of montmorillonite on TC was attributed to the strong binding affinity of TC to clay particles as well as the competition between colloids and TC for deposition sites on sand surfaces. Moreover, the transport-inhibition effect of ferrihydrite at pH 7.0 was greater than that at pH 5.0, mainly due to more colloid-associated TC under neutral conditions. Surprisingly, ferrihydrite colloids could act as carriers of antibiotics and enhanced TC transport at pH 9.0. Because the surface charge of colloids was altered to negative and could break through the column. Meanwhile, the transport-enhancement effect of montmorillonite decreased with increasing pH from 5.0 to 9.0, resulting from the decrease of colloid-adsorbed TC. Furthermore, colloid-mediated transport of TC was influenced by ionic strength , which affected the aggregation characteristics of colloids and the binding affinities of TC to minerals. These findings provide critical information for assessing the risks of antibiotics in aquatic ecosystems where abundant natural minerals are present.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2020
·
IF 9.13
Ruya Chen,Yuan Zhuang,Ying Yu,Baoyou Shi
Particulate manganese oxide (MnOx) deposition in drinking water distribution systems (DWDS) gives rise to the risk of water discoloration at the consumers’ tap; however, its role in the fate and transport of trace organic pollutants in DWDS is not clear. Perfluorooctanoic acid (PFOA), a persistent organic pollutant frequently detected in natural water, was selected to investigate the potential effect of MnOx on its transportation behavior under DWDS conditions through laboratory batch experiments. The results show that PFOA can be greatly combined with MnOx formed in-situ through a Mn(II) oxidation process by free chlorine. However, the accumulation of PFOA by preformed MnOx was negligible. It was found that 1 mg/L Mn captured over 50% of PFOA with an initial concentration of 50 ng/L during oxidation. The water compositions of actual water could contribute to the effect of PFOA accumulation to a certain extent. Characterization of the solid products revealed that PFOA is homogenously embedded into MnOx. The combination of PFOA with MnOx occurs through a bridging effect of Mn(II) between the surface hydroxyls of MnOx and the -COOH group of PFOA. The resulting MnOx-PFOA particles were more inclined to agglomerate, enabling possibly easy deposition onto the pipe wall than ordinary MnOx particles. This study provides insights into the co-occurrence of metal deposits with PFOA and the potential risks posed by PFOA accumulation to consumers through the water distribution process.
研究领域:
环境科学
·
水处理工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOILS AND SEDIMENTS
·
2019
·Vol. 20
·期 2
·911-920
·
IF 2.669
Zhang Mo,Li Duo,Ye Zhi,Wang Shiqi,Xu Nan,Wang Fang,Liu Shouqing,Chen Jianping,Gu Huajie
Purpose Nano silicon particles (nSiO 2 ) is one of the most widely used industrial engineered nanomaterials (ENMs). The extensive applications of nSiO 2 may pose potential risks to aquatic ecosystems and human health. Humic acid (HA) is a major component of soil and water that exists widely in the natural environment and adsorbs to the surface of nanoparticles, which affects the fate and transport of ENMs in soil. Therefore, it triggers the necessity to study the chemical reaction of HA controlling the sedimentation and transport of nSiO 2 . Materials and methods The sedimentation kinetics and transport breakthrough curves of nSiO 2 with/without HA in water-saturated porous media were studied in two electrolyte (NaCl and CaCl 2 ) solutions. The likely mechanisms were explored with both multiple technologies and numerical modeling including TEM-EDX, particle size distribution, zeta potentials, and the two-site kinetic attachment model (TSKAM). Results and discussion Our experimental results showed that the existence of HA generally increased the suspensivity and the transportability of nSiO 2 in NaCl and CaCl 2 solutions in packed sand columns at acidic pH. This result was attributed to the HA adsorption leading to the more negatively charged surface and the smaller size of nSiO 2 aggregates. However, the formation of coordination complexes associated with larger cluster among nSiO 2 between HA and Ca 2+ contributed to the increased sedimentation of nSiO 2 at alkaline pH. Subsequently, the presence of HA inhibited the transport of nSiO 2 in CaCl 2 solution at pH 9.0. Comparably, in NaCl at pH 9.0, HA showed the negligible effect on the nSiO 2 deposition in sand. Both the attachment and detachment parameters, which were obtained from fitting the breakthrough curves of ENMs using the TSKAM, could be used to well describe the transport behavior of nSiO 2 with HA under various conditions. In particular, the irreversible attachment parameters at site 2 on sand were positively related to the retention of nSiO 2 with HA. Conclusions The fate and transport of nSiO 2 can be distinctly affected by HA depending on the ion composition, ion strength, and pH in soil. This study will provide insights for assessing the mobility of nSiO 2 with HA in subsurface soil and aquatic environments.
研究领域:
环境科学
·
土壤学
✓ 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）