SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Hui Wang,Wei Huang,Yingshuang Zhang,Chongqing Wang,Hongru Jiang
Boron pollution in the aquatic environment has a hazardous effect on human health and the ecosystem as a metalloid pollutant, and few researchers have focused on the potential interaction between boron and microplastics . We investigated the adsorption of boron on four types of microplastics (polyvinyl chloride (PVC), aged PVC, polystyrene (PS), and aged PS). The adsorption behavior was explored by kinetics, isotherm models, and several aqueous factors, including pH, humic acid , ionic strength (Na + ), metal ion types (Mg 2+ , Ca 2+ , Cu 2+ , and Al 3+ ), and the seawater environment. The adsorption capacities on microplastics were followed: aged PVC (0.91 mg/g) > aged PS (0.197 mg/g) > virgin PVC (0.1 mg/g) > virgin PS (0.005 mg/g). The adsorption kinetics and isotherm models suggested monolayer adsorption and chemisorption . Humic acid and high pH significantly inhibited the adsorption due to the complexation and hydrolysis of boric acid (B(OH) 3 ), respectively. The presence of metal ions may enhance or hinder adsorption, depending on the boron species, ion concentration , ion type, and microplastics categories. The unique interaction mainly depended on surface complexations of B(OH) 3 with oxygen-containing groups on microplastics surface. Because aged microplastics have more oxygen-containing groups, they can combine more B(OH) 3 , and PVC can adsorb more boron due to the C Cl bond and surface diffusion . In the aquatic environment, however, metal ions may occupy these binding sites, and the electrostatic force between borate ([B(OH) 4 ] − ) and microplastics will take precedence. In the simulated intestines of warm-blooded animals, we achieved the greatest boron desorption ratio on microplastics. This work explored the adsorption characteristics of boron by microplastics and revealed potential environmental risks of metalloid enrichment.
研究领域:
环境科学
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生物学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 47
·19819-19827
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IF 2.7
Xiu-Juan Jiang,Rong-Gui Zhu,Chen-Xi Zhang,Bing Yang,Wen-Xia Yang,Ming-Xuan Jiang
In recent years, carbon dots (CDs), a type of new carbon nanomaterial, have been widely used. In this study, new fluorescent CDs were synthesized via a one-step hydrothermal synthesis using 2,3-dihydroxynaphthalene and sodium citrate as the carbon source. The results showed that the prepared CDs were significantly quenched by Fe3+ in aqueous environments, and a good linear relationship between the fluorescence intensity of the CDs and a low concentration of Fe3+ was observed. The detection limit of Fe3+ was 0.12 μM, the linear range was 0–4.69 μM and the recovery range of the sample detection was 84–111%. The new fluorescent CDs showed high sensitivity to Fe3+ in the presence of various metal ions and anions. These excellent characteristics promise extensive potential applications for our fluorescent CDs in aqueous environmental monitoring.
研究领域:
分析化学
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环境科学
·
纳米材料
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DOI
高影响因子
MARINE POLLUTION BULLETIN
·
2019
·
IF 3.782
Xuan Guo,Jianlong Wang
Microplastics in environments undergo aging processes and may sorb antibiotics from surrounding water. Understanding the interaction between aged microplastics and antibiotics is important to assess the impact of microplastics on environments. In this paper, the sorption of three typical antibiotics, i.e., sulfamethoxazole (SMX), sulfamethazine (SMT), and cephalosporin C (CEP-C) onto the naturally aged microplastics (polystyrene (PS) and polyethylene (PE)) derived from aged plastics samples from the coast of East China Sea and Yellow Sea, China in freshwater and simulated seawater systems were studied. The results indicated that the mixed order (MO) model provided good prediction for the kinetics data. The linear isotherm represented adequately the sorption equilibrium data in freshwater. The K d values ranged from 0.0236 L·g −1 to 0.0383 L·g −1 . In simulated seawater, only CEP-C could be sorbed onto the microplastics. The main sorption mechanisms are hydrophobic, van der Waals, and electrostatic interactions.
研究领域:
环境科学
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生态学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Mojtaba Mansoorianfar,Khashayar Shahin,Akbar Hojjati–Najafabadi,Renjun Pei
In this study, Ti 3 C 2 MXene nanofragments with a size distribution of about 20 nm were laden on the well-characterized bacteriophages via electrostatic bonding , introducing a new antibacterial agent as a modified virus vector to be used in high-risk bacterial environment. At > MIC of MXene, the MXene-functionalized bacteriophage would be much more active in attacking the bacteria because of the high specificity for host receptors’ recognition and targeting ability of bacteriophage and bacterial surface negative charge when comparing to the phage alone. Also, the induced positive surface moieties drive MXene nanofragments toward the negative surface charge of bacteria. The main mechanisms are the specific targeting capacity of bacteriophages, often by lysing the host and bursting out, and the physical interaction of MXene nanofragments with the bacterial cell membrane, which may rupture the cell wall in microbial death. The results described that the Ti 3 C 2 MXene significantly enhanced the bacteriophage adsorption rate and stability over long-standing cultivation in aquatic environments providing superior antibacterial efficacy against the bacterial cells target. The Ti 3 C 2 MXene-laden bacteriophage demonstrated a fast, efficient attaching to bacterial host cells, high antibacterial potential, and reduced 99.99% of the artificial contamination in water samples. Interestingly, no re-growth of target bacteria was observed in the samples during the experiment period, and the count of bacteria constantly remained below the detection threshold. This research raises attention in proposing a novel antibacterial agent to be synthesized through a simple one-step technique devoid of shortcomings of post-treatments in conventional antibacterial treatments.
研究领域:
微生物学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
STAR Protocols
·
2023
·
IF 0
Tiantian Feng,Xuran Chen,Shilei Zhao,Meng Cao,Lijuan Feng,Se Shi,Hui Wang,Tao Liu,Yihui Yuan,Ning Wang
Summary Detection of radioactive iodide ions (I – ) is important for protecting human beings from the hazards of radioactive pollution. Herein, we present a protocol for detecting I – using a zirconium(IV)-enhanced strategy. We describe steps for optimizing the I – detection approach, establishing standard curves, and finally applying the approach. The use of zirconium(IV) greatly improves the detection performance and endows this approach with an ultralow detection limit of 0.176 nM together with wide applicability in various aqueous environments. For complete details on the use and execution of this protocol, please refer to Feng et al. (2022). 1
研究领域:
分析化学
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环境科学
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DOI
PubMed
JOURNAL OF FLUORESCENCE
·
2020
·Vol. 30
·期 3
·463-470
·
IF 2.093
Chen Hongxia,Peng Junxiang,Yu Long,Chen Hui,Sun Mingtai,Sun Zhenli,Ni Runyan,Alamry Khalid A.,Marwani Hadi M.,Wang Suhua
Herein, we report an interesting finding about the new application of oxytetracycline (OTC), as a fluorescent probe for the detection of calcium ion (Ca 2+ ), which proved that it can offer an expeditious, highly sensitive, and selective detection method for Ca 2+ . Upon the addition of Ca 2+ , the fluorescence of OTC could be significantly enhanced with rapid response and high sensitivity, and achieved a good limit of detection as low as 125 nM in aqueous solution. The complex formed via Ca 2+ coordinating to the hydroxyl group of OTC contributes to the fluorescence enhancement, which has been proved by several characterization methods including UV-vis analysis, binding constant determination, and fluorescence titration. The method avoided complexity for EDTA measurement of Ca 2+ in running water as proposed previously. Taking advantage of good availability, stability and operability, the OTC was further successfully applied to the detection of Ca 2+ in a real environment.
Graphical Abstract
研究领域:
分析化学
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生物化学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Chao Song,Hua-Yu Liu,Shuang Guo,Shu-Guang Wang
As the most typical geological environment, limestone landforms are widespreading in the world and affect the waters that flow around them, which may also change the fate of organic contaminants in these waters. In this study, aquatic environment surrounding limestone was simulated with calcium carbonate , and the photolysis of tetracycline was evaluated under UV irradiation (30 μW/cm 2 ). More tetracycline (up to 98%) was removed in 4 h in the presence of calcium carbonate while only 50% of tetracycline was eliminated in control experiment. The removal of tetracycline was greatly enhanced due to the major roles of alkaline pH and minor roles of Ca 2+ and HCO 3 − /CO 3 2− . In alkaline pH, tetracycline existed as TCs − with higher electronic density in the ring structures, which was more easily attacked by OH. Besides, it could also change the bond orbital energy to facilitate tetracycline absorbing more photon. Moreover, alkaline pH was beneficial to generate more OH and thus promote the indirect photolysis. In addition, alkaline pH also changed the degradation path of tetracycline and rapidly convert tetracycline to the byproducts with m/z 457 via hydroxylation and hydrogen abstraction. This work provides not only better understanding about the fate of tetracycline in aquatic environments but also new insights into the treatment of antibiotic-contaminated water.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Hongwei Luo,Yahui Xiang,Dongqin He,Yu Li,Yaoyao Zhao,Shuo Wang,Xiangliang Pan
Chemical additives leaching from microplastics and their effects on physiology of microalgae are of environmental significance. So far, these issues remain unclear. Here, the leaching behavior of fluorescent additives from polyurethane sponge microplastics in simulated (acidic, saline, and basic water) and natural waters (river, lake, wetland, and sea water) was investigated. Release amount of additives increased with increasing solution pH and leaching time. The maximum release amount was reached at the leaching time of 12–24 h and the 3,3′-diaminobenzidine-like substances were identified in the leachate. The leached concentrations of fluorescent additives in simulated and natural waters followed the order of basic water > saline water > seawater > West Lake > River > Wetland. Effects of leachate and microplastics on growth and photosynthesis of Chlorella vulgaris were further evaluated. The maximum quantum efficiency of photosystem II (F v /F m ) decreased with increasing leachate concentrations. Only high content (1.6 g L −1 ) of microplastics exerted significant inhibitory influence on cell photosynthesis when microalgae were exposed to microplastics alone. Retention of algal cells inside the porous sponge microplastics did not change their photosynthetic efficiency. These findings indicate that leaching process of additives from microplastics depends mainly on water environments and the leached chemicals may pose ecological risks to aquatic organisms.
研究领域:
环境科学
·
生态毒理学
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DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2019
·
IF 10.159
Yifang Gao,Huilin Zhang,Yuan Jiao,Wenjing Lu,Yang Liu,Hui Han,Xiaojuan Gong,Shaomin Shuang,Chuan Dong
Activating room-temperature phosphorescence (RTP) emission in aqueous environments is a challenging feat because of the releasing of nonradiative decay pathways. Here, a design strategy was presented that effectively promotes the presence of RTP of carbon dots (CDs) in aqueous solutions by utilizing CDs and melamine to construct hydrogen-bonded networks to form a polymer (M-CDs). The obtained M-CDs not only enjoy an ultralong phosphorescence lifetime of 664 ms, but also relatively high quantum yield of 25% in an aqueous environment at 468 nm excitation. This is also a rare example of achieving RTP of CDs with a solid state in an aqueous environment. Further investigations reveal that the hydrogen-bonded networks are critical to the implementation of RTP in an aqueous environment. The existence of covalent bonds in CDs and melamine further stabilizes the hydrogen-bond skeleton and triplet state. Furthermore, the bound water formed inside the M-CDs also plays an indispensable role in stabilizing the RTP in the aqueous solution. Given the feature, the M-CDs are used to effectively implement double data encryption and decryption. In addition, this strategy is universal for most phosphorescence materials. This result will pave the way toward expanding RTP materials and their applications in aqueous environments.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
Environmental Science-Nano
·
2018
·Vol. 5
·期 10
·2452-2460
·
IF 6.087
Yinqing Zhang,Junchao Xia,Jinliang Xu,Binbin Sun,Wei Wu,Lingyan Zhu
Due to their excellent properties, silver nanowires (AgNWs) have been applied increasingly in many optical and electronic products, and may be inevitably discharged in aquatic environments. Dissolution and sulfidation are two of the most important processes of AgNWs occurring in aquatic environments and may significantly affect their fate and toxicities. This study aimed to investigate the impacts of four types of surfactants on the dissolution and sulfidation of AgNWs. Anionic, zwitterionic, and nonionic surfactants, including sodium dodecylbenzenesulfonate, cetyl betaine, and glycerol monostearate, did not affect the dissolution and sulfidation of AgNWs. However, cationic surfactants (cetyltrimethylammonium bromide, cetyltrimethylammonium nitrate and benzyldimethyldodecylammonium nitrate) promoted the dissolution and sulfidation of AgNWs significantly. The cationic surfactants, especially cetyltrimethylammonium bromide, preferred to bind with the (111) planes of AgNWs, leading to the corrosion of the initial wire structure of AgNWs to shorter nanorods. The increased surface area of AgNWs resulted in faster dissolution. The dissolved Ag+ ions reacted with sulfide quickly, leading to faster sulfidation of AgNWs. In addition, the cationic surfactants interacted with AgNWs and decreased the electrostatic repulsion between the sulfide ions and the surface of AgNWs, thus promoting the direct oxysulfidation. As a consequence, the cationic surfactants facilitated the sulfidation of AgNWs to a greater extent than dissolution. The interaction of AgNWs and surfactants could significantly affect their bioavailability and ecotoxicities in aquatic environments.
研究领域:
环境科学
·
纳米材料科学
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DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Zhihui Qin,Weiwei Su,Ping Liu,Jinming Ma,Yaru Zhang,Tifeng Jiao
Iron ions play an important role in our lives. Excessive or lack of iron ion intake leads to many diseases. At the same time, the water environment is easily polluted by these metal ions with the acceleration of industrialization. Therefore, the detection of iron ions in the water environment and the human body is particularly important. In this paper, we prepared a RhB-EDA fluorescent probe by condensing rhodamine B (RhB) with ethylenediamine (EDA) for high recognition of Fe3+. A RhB-EDA molecule itself is colorless and has no fluorescence emission in an alcohol solution. When Fe3+ was added, the lactam ring structure of the fluorescent probe opened, and the UV and fluorescence spectra changed. At the same time, the color of the mixed solution gradually deepened toward pink. Therefore, dual spectral detection and naked-eye observation of Fe3+ were realized. In addition, with the decrease of the pH value and the prolongation of chelating time, the ultraviolet absorbance and fluorescence emission intensity were enhanced and the color of the mixed solution deepened. The RhD-EDA fluorescent probe is simple and accurate and provides good technical support for the detection of Fe3+.
研究领域:
分析化学
·
环境科学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2023
·
IF 3.8
Mengwei Wang,Qiuyan Ran,Songgu Wu,Dandan Han,Junbo Gong
The use of polymers is an increasingly common approach to prevent crystallization from the supersaturated solutions for enhanced bioavailability of poorly water-soluble drugs. In this study, roxadustat (RST), a water-insoluble drug, was selected as a model substance. We quantified the effectiveness of three polymers with different types of hydrogen bonding moieties, polyvinylpyrrolidone (PVP), poly(1-vinylpyrrolidone-co-vinyl acetate) (PVPVA), and hydroxypropyl methylcellulose (HPMC), on nuclear inhibition of RST and found that the inhibitory effect was HPMC > PVPVA > PVP. In the absence of polymers, the induction time of RST in the RST supersaturated solution was 1.5 min, while in the presence of HPMC, the induction time of RST was as long as 84.5 min. Simulation by Material Studio suggested that the compatibility and bonding energy between the polymers and RST showed a strongly positive correlation with the effectiveness of polymers. The combined inhibitory effect of hydrogen bonding and hydrophobic interaction between RST and polymers were revealed by FTIR, 1H NMR spectroscopy, and nuclear Overhauser effect spectroscopy. Moreover, the obtained amorphous-state RST in RST–polymer amorphous solid dispersions achieved improved solubility than that of crystalline RST, and the dissolved amorphous RST maintained the supersaturation for 6 h in the dissolution test without the decrease in concentration due to nucleation and crystal growth.
研究领域:
药剂学
·
药物化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）