MOLECULES
·
2022
·Vol. 27
·期 19
·6749
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IF 4.927
Zhuang Xiang,Yuxiang Jiang,Chen Cui,Yuanping Luo,Zhili Peng
In this study, C-dots were facilely synthesized via microwave irradiation using citric acid and ethylenediamine as carbon precursors. The fluorescence emissions of the C-dots could be selectively quenched by Fe3+, and the degree of quenching was linearly related to the concentrations of Fe3+presented. This phenomenon was utilized to develop a sensitive fluorescence assay for Fe3+detection with broad linear range (0–250, 250–1200 μmol/L) and low detection limit (1.68 μmol/L). Most importantly, the assay demonstrated high reliability towards samples in deionized water, tap water and lake water, which should find potential applications for Fe3+monitoring in complicated environments.Keywords:Fe3+;fluorescence sensing;carbon dots;lake water;limit of detection
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
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2021
·
IF 8.071
Qing Yang,Yongqiang Liu,Lihong Wang,Qing Zhou,Mengzhu Cheng,Jiahong Zhou,Xiaohua Huang
Aggravating the pollution of microcystins (MCs) in freshwater environments is detrimental to aquatic living organisms and humans, and thus threatens the stability of ecosystems. Some environmental factors have been verified to promote the production of MCs in Microcystis aeruginosa , thereby aggravating the pollution of MCs. However, the effects of cerium (Ce), the most abundant rare earth element in global water environments, on the production of MCs in M. aeruginosa are unknown. Here, Lake Taihu water was selected as a representative of freshwater environments. By using interdisciplinary methods, it was found that: (1) the exposure level of Ce [Ce(III) and Ce(IV)] in Lake Taihu water is in the range of 0.271–0.282 μg/L; (2) Ce exposure in Lake Taihu water promoted the contents of three main MCs (MC-LR, MC-LW and MC-YR) in M. aeruginosa and water; (3) a cellular mechanism of Ce promoting the production of MCs in M. aeruginosa in Lake Taihu water was suggested: Ce enhanced endocytosis in cells of M. aeruginosa to promote the essential element uptake by M. aeruginosa for MC synthesis. Thus, Ce exposure in Lake Taihu water aggravates the pollution of MCs via enhancing endocytosis in cells of M. aeruginosa . The results provide reference for assessing the environmental risk of Ce in water environments, investigating the mechanism of the pollution of MCs induced by environmental factors, and developing strategies aimed at preventing and controlling the pollution of MCs.
研究领域:
环境科学
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生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
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2022
·Vol. 32
·期 2
·505-519
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IF 2.525
Liu Yipeng,Li Bingyan,Zhang Huixia,Liu Yong,Xie Ping
Microcystin-LR (MC-LR) is widely distributed in natural lakes and could strongly inhibit protein phosphatase activity; it is also a potent liver tumor promoter. Over the last two decades, tremendous efforts have been devoted to enhance the detection of MC-LR in water samples. However, the traditional method is complex and costly, and achieving the fast, sensitive, and accurate determination of MC-LR in the cells and natural lakes by using fluorescence signal changes is fairly difficult. Our work explores novel fluorescent probes that are capable of concurrently analyzing and detecting MC-LR in the cells and water. In this study, we introduce, for the first time, 5-AF and 6-AF as small-molecule fluorescent probes suitable for MC-LR detection in the cells and water samples based on fluorescence signal changes. We titrated 5-AF and 6-AF with MC-LR in pure water, scanned the fluorescence of the sample, and then obtained the equation the fluorescence intensity versus MC-LR concentration curve. MC-LR in lake water samples was crudely purified, and then 5-AF was added to measure its fluorescence peak. The fluorescence intensity of 5-AF is significantly enhanced with increasing MC-LR concentration. This enhancement trend is stable and could be mathematically modeled. We also comprehensively analyzed the mechanism and recognition principle of the probe response to MC-LR in natural lake water. Moreover, we believe that 5-AF may be capable of detecting exogenous MC-LR in cells. The results of this study reveal that these unique fluorescent probes may be applied to construct near-infrared fluorescent probes that could detect MC-LR levels in vivo. Graphical Abstract
研究领域:
环境科学
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分析化学
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Nijuan Liu,Cuicui Li,Jing Bai,Hao Liang,Qinqin Gao,Nana Wang,Ruibin Guo,Zhi Qin,Zunli Mo
In order to promote the sustainable development and utilization of nuclear energy, it is essential to develop convenient and efficient methods for uranium enrichment. In this work, an amidoxime functionalized magnetic composite (CS-Ppy-Fe 3 O 4 -AO) was synthesized by a simple two-step process and applied for selective adsorption of uranium from natural Salt Lake water. The effect of CS-Ppy-Fe 3 O 4 -AO on the uranium adsorption capacity under different conditions such as pH, contact time, temperature, ionic strength and interfering ions were firstly investigated by batch experiments. The results indicated that the maximum adsorption capacity was 937.14 mg/g at pH= 6 and T = 298 K, which was higher than that of most currently reported magnetic adsorbents. Moreover, the adsorbent could be easily regenerated and still maintained high adsorption capacity after five adsorption-desorption cycles. Meanwhile, the adsorption mechanism of CS-Ppy-Fe 3 O 4 -AO on uranium was investigated by FT-IR and XPS, and they showed that nitrogen-oxygen functional groups (e.g. amidoxime and amino groups) played a predominant role on the adsorption of uranium. What’ s more, the CS-Ppy-Fe 3 O 4 -AO showed excellent selectivity and adsorption capacity (3.75 mg/g) on uranium in Salt Lake water, which implied that the CS-Ppy-Fe 3 O 4 -AO could be potentially used as a desired adsorbent on uranium enrichment.
研究领域:
核能技术
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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 Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Ziyi Zhu,Hongbin Ma,Zhen Liu,Siting Cheng,Caihong Zhang,Rulin Jia,Peipeng Jin,Yupeng Wei
The corrosion behaviors of Mg-3Nd alloy in Qinghai Lake water (Cl − , SO 4 2− , HCO 3 − , CO 3 2− ) were studied, focusing on synergistic anion effects between Cl − and HCO 3 − . HCO 3 − demonstrates dual roles in Mg alloy corrosion mechanisms: it induces localized micro-galvanic coupling effects that exacerbate anodic dissolution during initial exposure, while facilitating the progressive formation of a composite Mg(OH) 2 /MgCO 3 passivation layer through interfacial precipitation reactions during long-term immersion. Cl − induced interfacial degradation triggers lamellar spallation of Mg(OH) 2 /MgCO 3 layers. The results revealed the competitive effects of anion interactions and transient protective phase MgCO 3 on corrosion behaviors of Mg alloy, providing insights for the design of corrosion-resistant lightweight equipment in salt-lake water environments.
研究领域:
材料科学
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电化学
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环境腐蚀
✓ 已验证
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Haixia Liu,Chunyu Yang,Wei Guo,Feng Zhang,Huiming Lin,Le Zhao,Tianyue Ma,Xinxin Lu,Fengyu Qu
Solar-driven water evaporation has been proven to be a promising and efficient method for the energy crisis and clean water shortage issues. Herein, we strategically design and fabricate a novel nonstoichiometric CoWO4–x-deposited foam nickel (NF) membrane (CoWO4–x@NF) that possesses all the desirable optical, thermal, and wetting properties for efficient water evaporation and purification. The broadband absorption of CoWO4–x nanoparticles (NPs) obtained by hydrogen reduction contributes to light-to-heat conversion, while NF with a three-dimensional porous structure can support CoWO4–x NPs and ensure the rapid flow of water molecules during the water evaporation process. We systematically explore and compare the outdoor water evaporation performance of the pure water group, NF group, and CoWO4–x@NF group, and the results show that CoWO4–x@NF performs well under natural sunlight irradiation (water evaporation: 2.91 kg m–2). Significantly, under solar irradiation, the remarkable reduction of Cyanophyta and Euglenophyta in lake water is achieved in the CoWO4–x@NF membrane-administered group, and these two algae are the main factors for eutrophication of the lake water. Our work highlights the great potentials of the CoWO4–x@NF membrane as a device for realizing outdoor solar energy-driven water evaporation and proposes a new strategy for purifying the eutrophication of the lake water.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Hui Yang,Lei Li,Junyi Li,Shuili Yu,Naiyun Gao,Charles Flomo Togbah
The presence of natural organic matter (NOM) in surface water and its significance for removing pollutants during nanofiltration (NF) are overlooked since most previous studies were conducted in synthetic water rather than real water. In this paper, using raw water collected from Lake Tai (the third largest lake in China), we investigate the removal of 2-methylisoborneol (2-MIB, one of the most concerned off-flavor compounds in raw water) by NF and analyze the binding behaviors between 2-MIB and NOM, which affect their corresponding migration and removal behaviors of 2-MIB during NF. The results show that the removal of 2-MIB in real raw water is 12.2 ∼ 22.0 % higher than that in pure water (PW). Additionally, we evaluate the increment of the removal of 2-MIB under different backgrounds, which follow the order NOM (17.2 %∼22.0 %) > bovine serum albumin (BSA 16.0 %∼19.1 %) > intracellular organic matter (IOM) of M. aeruginosa (8.3 %∼9.4 %) > sodium carboxymethyl cellulose (CMC 3.9 %∼6.5 %) > humic acid (HA 0.28 %∼0.31 %). These findings demonstrate that the protein-like components in raw water play a major role in binding to 2-MIB, while humic-like components exhibit a weak association with 2-MIB. Overall, the conclusion and findings in this study provide a new perspective on the NOM effect on micropollutant removal during water treatment.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2018
·
IF 1.1
Jing Liu,Xiao Li,Xin Gong,Taiping Qing,Peng Zhang,Bo Feng
The incorporation of dopant atoms alters the structure of MoS 2 , resulting in unique properties and practical applications. Herein, a facile and low-cost approach for producing N-doped molybdenum disulfide (N-MoS 2 ) was carried out using melamine and MoS 2 in a laboratory tube furnace at 400 ∘ C for 2 h. The N-MoS 2 fluorescent probe showed sensitive response to Hg 2 + in a wide concentration range of 0.4–10 μ M with a low limit of 28 nM. The practical applicability of detecting Hg 2 + in lake water samples may open a new way to evaluate Hg 2 + in wastewater.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Kun Chen,Chaoqun Ma,Guoqing Chen,Taiqun Yang,Hui Gao,Lei Li,Zichen Yang,Jun Cao,Chenkai Zheng,Longyao Ma
This study presents the design of a Surface-enhanced Raman scattering (SERS) substrate, COF@Ag, for the sensitive detection of Amoxicillin (AMX) in lake water and honey. Furthermore, the study investigates the role of covalent organic frameworks (COFs) in SERS detection. The characterization results demonstrate the capability of COFs to efficiently enrich Ag nanoparticles (AgNPs), resulting in a more concentrated distribution of hotspots and an enhanced electromagnetic field on the substrate. By employing density functional theory (DFT) simulation, the frontier electronic orbitals of COFs and AMX were analyzed, and the chemical bonds and weak interactions in the system were examined using the Interaction Region Indicator (IRI) method to propose potential enhancement mechanisms. In aqueous solutions, the linear range is 1 μg/L-30 μg/L, with a limit of detection (LOD) 0.279 μg/L. In lake water, the linear range span from 100 μg/L to 500 μg/L, with a detection limit of 8.244 μg/L. For honey, the linear range extend from 20 ng/g to 100 ng/g, with a detection limit of 2.917 ng/g. This method holds key significance in facilitating the rapid detection of amoxicillin and advancing the application of COFs in SERS.
研究领域:
分析化学
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材料科学
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环境科学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2021
·
IF 5.565
Jiabao Li,Haifeng Zhang,Juan Wang,Zhiyong Yu,Hongyan Li,Min Yang
Although disinfection byproducts (DBPs) in drinking water have been suggested as a cancer causing factor, the causative compounds have not yet been clarified. In this study, we used liquid chromatography quadrupole-time-of-flight spectrometry (LC-QTOF MS) to identify the unknown disinfection byproducts (DBPs) in drinking water produced from Taihu Lake source water, which is known as a convergence point for the anthropogenic pollutants discharged from intensive industrial activities in the surrounding regions. In total, 91 formulas of DBPs were discovered through LC-QTOF MS nontarget screen, 81 of which have not yet been reported. Among the 91 molecules, 56 only contain bromine, 15 only contain chlorine and 20 DBPs have both bromine and chlorine atoms. Finally, five DBPs including 2,4,6-tribromophenol, 2,6-dibromo-4-chlorophenol, 2,6-dichloro-4-bromophenol, 4-bromo-2,6-di-tert-butylphenol and 3,6-dibromocarbazole were confirmed using standards. The former three compounds mainly formed in the predisinfection step (maximum concentration, 0.2-2.6 µg/L), while the latter two formed in the disinfection step (maximum concentration, 18.2-33.6 ng/L). In addition, 19 possible precursors of the discovered DBPs were detected, with the aromatic compounds being a major group. 2,6-di-tert-butylphenol as the precursor of 4-bromo-2,6-di-tert-butylphenol was confirmed with standard, with a concentration of 20.3 µg/L in raw water. The results of this study show that brominated DBPs which are possibly formed from industrial pollutants are relevant DBP species in drinking water produced form Taihu source water, suggesting protection of Taihu Lake source water is important to control the DBP risks.
研究领域:
环境科学
·
公共卫生
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Hao Liang,Wei Tian,Nana Wang,Hongping Zhang,Ruijuan Wang,Ruibin Guo,Zunli Mo,Nijuan Liu
Uranium as a nuclear fuel, its source and aftertreatment has been a hot topic of debate for developers. In this paper, amidoxime and guanidino-modified cotton fibers (DC-AO-PHMG) were synthesized by the two-step functionalization approach, which exhibited remarkable antimicrobial and high uranium recovery property. Adsorption tests revealed that DC-AO-PHMG had excellent selectivity and anti-interference properties, the maximum adsorption capacity of 609.75 mg/g. More than 85 % adsorption capacity could still be kept after 10 adsorption-desorption cycles, and it conformed to the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model as a spontaneous heat-absorbing chemical monolayer process. FT-IR, EDS and XPS analyses speculated that the amidoxime and amino synergistically increased the uranium uptake. The inhibitory activities of DC-AO-PHMG against three aquatic bacteria, BEY , BEL (from Yellow River water and lake bottom silt, respectively) and B. subtilis were significantly stronger, and the uranium adsorption was not impacted by the high bacteria content. Most importantly, DC-AO-PHMG removed up to 94 % of uranium in simulated seawater and extracted up to 4.65 mg/g of uranium from Salt Lake water, which demonstrated its great potential in the field of uranium resource recovery.
研究领域:
材料科学
·
环境科学
·
核能技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yanping Wang,Qiongyuan Zhang,Kexin Li,Chunyan Wang,Dezhen Fang,Wenjie Han,Miao Lu,Xiushen Ye,Huifang Zhang,Haining Liu,Xiaoli Tan,Zhijian Wu
Rubidium (Rb) and cesium (Cs) have important applications in highly technical fields. Salt lakes contain huge reserves of Rb and Cs with industrial significance, which can be utilized after extraction. In this study, a composite magnetic adsorbent (Fe3O4@ZIF-8@AMP, AMP = ammonium phosphomolybdate) was prepared and its adsorption properties for Rb+ and Cs+ were studied in simulated and practical brine. The structure of the adsorbent was characterized by SEM, XRD, N2 adsorption–desorption, FT-IR, and vibrating sample magnetometer (VSM). The adsorbent had good adsorption affinity for Rb+ and Cs+. The Langmuir model and pseudo-second-order dynamics described the adsorbing isotherm and kinetic dates, respectively. The adsorption capacity and adsorption rate of Fe3O4@ZIF-8@AMP were increased by 1.86- and 2.5-fold compared with those of powdered crystal AMP, owing to the large specific surface area and high dispersibility of the adsorbent in the solution. The adsorbent was rapidly separated from the solution within 17 s using an applied magnetic field owing to the good magnetic properties. The composite adsorbent selectively adsorbed Rb+ and Cs+ from the practical brine even in the presence of a large number of coexisting ions. The promising adsorbent can be used to extract Rb+ and Cs+ from aqueous solutions.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）