ADSORPTION SCIENCE & TECHNOLOGY
·
2021
·
IF 4.232
Jiezeng Chen,Hongying Shu,Pingping Niu,Pinghua Chen,Hualin Jiang
Due to the abuse application of antibiotics in the recent decades, a high level of antibiotics has been let out and remains in our environment. Electrochemical sensing is a useful method to sensitively detect antibiotics, and the key factor for a successful electrochemical sensor is the active electrode materials. In this study, a sensitive electrochemical sensing platform based on a metal-organic framework (MOF) of MIL-53 (Fe) was facilely fabricated. It shows highly selective and sensitive detection performance for trace tetracycline. Differential pulse voltammetry (DPV) was applied to analyze the detection of tetracycline. The linear range of tetracycline detection was 0.0643 μmol/L-1.53 μmol/L, and the limit of detection (LOD) is 0.0260 μmol/L. Furthermore, the MOF-enabled sensor can be effectively used in actual water bodies. The results indicate that the electrochemical sensor is a high potential sensing platform for tetracycline.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
GEODERMA
·
2017
·
IF 4.036
Dasheng Sun,Qingfang Bi,Huaping Xu,Kejie Li,Xipeng Liu,Jun Zhu,Qichun Zhang,Chongwei Jin,Lingli Lu,Xianyong Lin
Soil drying-rewetting can remarkably affect phosphorus (P) transformation, and thus, alter P distribution among P pools; however, little is known about the effect of the degree of drying before rewetting on labile P fractions and the bioavailability of organic P (P o ). In this study, soils with distinct physico-chemical properties were allowed to desiccate to 5%, 10%, 20%, 30%, and 40% water holding capacity (WHC), and soils maintained at 50% WHC were used as controls, and the bicarbonate-extractable P and hydrolyzable P o fractions were analyzed after 5 h of rewetting. Bicarbonate-extractable P o accounted for 33.3–56.4% of extractable total P, and hydrolyzable P o constituted 34.4–79.7% of extractable P o . For extractable P o , 7.7–29.9% was labile monoester P, 6.5–14.9% was diester P, and 17.8–36.5% was phytate-like P. Bicarbonate-extractable inorganic P and P o contents were not affected by 20–40% WHC treatments, but increased by 26.3–48.1% and 5.7–52.9%, respectively, when the soils were dried to 5% WHC. Similarly, labile monoester, diester, and phytate-like P contents increased by 12.5–89.8%, 0–65.2%, and 24.6–65.6%, respectively, in 5% WHC soils. Pearson's correlation analyses showed that the relative increases in bicarbonate-extractable inorganic P and phytate-like P, following extreme drought, were positively correlated with soil organic carbon , oxalate-extractable aluminum (Al), and iron (Fe), suggesting regulatory roles of organic matter and Al/Fe oxides in P transformation during soil drying-rewetting. Taken together, our results suggest that extreme drought events before rainfall or irrigation facilitate an increase in the level of labile P, including considerable proportions of hydrolyzable P o fractions, potentially posing a substantial threat to water bodies in the context of climate change .
研究领域:
生态学
·
环境科学
✓ 已验证
DOI
高影响因子
Water Reuse
·
2024
·Vol. 14
·期 1
·39-50
·
IF 4.3
Huang Yiru,Li Youyou,Zhong Qingwei,Luo Chen
View large Download slide View large Download slide Close modal Metal-organic framework (MOF) materials, characterized by their porosity and large specific surface areas, exhibit excellent adsorption properties. With the aim of removing Te(IV) from environmental aquatic systems, this study is the first to propose the use of MIL-100(Fe). The material reveals a strong adsorption capacity for Te(IV), with maximum adsorption of 531.9 mg/g, superior to other adsorbent materials. Adsorption isotherm and kinetic models indicate that the adsorption process primarily involves monolayer chemical adsorption. According to the thermodynamic parameters, the adsorption reaction is endothermic. The experiment individually examined factors affecting the material's adsorption performance, including adsorbent dose, initial concentration of Te(IV), pH, adsorption time, and coexisting ions. Even under high ion strength conditions and high concentrations of coexisting ions, the material's adsorption efficiency for Te(IV) still reached over 94%. The material has been successfully applied to remove Te(IV) from lake water, river water, and seawater, yielding satisfactory results. Due to the high salinity and ionic strength of the solution, the removal efficiency of Te(IV) in the seawater matrix was slightly lower than that in freshwater (river and lake water). Thus, this material shows promise for the removal of Te(IV) from complex aquatic systems. MIL-100(Fe) was prepared and characterized. The Te(IV) can be adsorbed by MIL-100(Fe) effectively, and the adsorption process was primarily a monolayer chemical adsorption and an endothermic reaction. The Te(IV) can be removed effectively in environmental water supplies by MIL-100(Fe).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Yangyang Cai,Heng Li,Zuming Zhang,Shuxin Huang,Jin Xu
Total phosphorus is a key indicator of eutrophication, but conventional total phosphorus methods face challenges such as complex operational procedures, bulky instrumentation, and safety risks, limiting on-site rapid analysis. In this study, an on-site total phosphorus determination method was developed by integrating peroxymonosulfate-based advanced oxidation processes with the phosphomolybdenum blue spectrophotometric method. The system was composed of a portable thermal cup for mild sample digestion and a compact spectrophotometer for quantitative analysis, enabling rapid on-site determination of total phosphorus in natural waters without the need for high temperature or pressure. Compared with traditional laboratory methods, operational complexity and equipment footprint were significantly reduced providing a practical solution for real-time water quality monitoring. The effects of initial solution pH, digestion temperature, digestion duration, and peroxymonosulfate concentration on digestion efficiency were systematically investigated, and optimal on-site digestion conditions were determined using response surface methodology. The method exhibited excellent linearity in the range of 0.0-0.6 mg·L⁻¹ and a detection limit of 0.008 mg·L⁻¹. Spiked recoveries in various matrices were 107.5%-116.5%, indicating broad applicability in diverse aquatic environments. Results from actual water samples, were consistent with those obtained by the standard method, confirming the reliability and accuracy of the proposed approach for on-site total phosphorus determination.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Technology & Innovation
·
2022
·
IF 7.758
Zhen Jiao,Zhijia Miao,Heluan An,Qing Li,Xiangyuan Meng
Water eutrophication caused by phosphate emissions has become a serious environmental issue. In this study, we used the solvothermal method to prepare a novel Ce-doped MIL-100(Fe). Scanning electron microscope observations suggest that Ce-doped MIL-100(Fe) consisted of irregular polyhedrons in the size range of tens of micrometers. Spectroscopy results show that cerium atoms (Ce) were successfully doped into the MIL-100(Fe) frameworks. The specific surface area and pore size of the Ce-doped MIL-100(Fe) were 2.6 m 2 /g and 3.4 nm, respectively. Adsorptive kinetics indicated that the pseudo-second-order model with a high correlation coefficient of ( R 2 : 0.9950) fitted better than the pseudo first-order model with R 2 of 0.9436. The adsorptive isotherms showed that for these adsorption reactions, the Langmuir model matched much better than the Freundlich model for this adsorption. These facts suggest that adsorption is chemical sorption, which occurred on a homogeneous surface. The adsorption capacity of the Ce-doped MIL-100(Fe) was as high as 12.03 mg/g. The adsorption capacity of the Ce-doped MIL-100(Fe) depended strongly on the solution pH, ionic strength, and the coexisted ions. The study also found that the precipitation reaction and complexation interaction might be dominated in the adsorption. This study may contribute to the design of bimetal organic frameworks, and might add new insights into the removal of phosphate.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Di Zhang,Ran Duan,Xiaohua Zhou,Zhiwei Ma,Jiacheng Shi,He Chen,Jie Guo,Man Li,Tieliang Wang,Xujin Wu
Thiophenol (PhSH) and its derivatives are widely employed as common industrial raw materials, while they also pose high toxicity for animals and aquatic organisms. Herein, a novel fluorescent probe P1 was constructed, based on photo-induced electron transfer (PET) mechanism, using naphthimide as the fluorophore and 7-nitrobenzoxadiazole as the recognizing group. Probe P1 exhibited an “Off-On” fluorescence recognition response to PhSH by nucleophilic substitution reaction. The probe displayed advantageous properties for the recognition of PhSH, including a chromogenic response, high selectivity, fast response (< 90 s), and a large Stokes shift (150 nm). In addition, probe P1 exhibited a good linear response to PhSH within the range of 0–9 μM, and the limit of detection (LOD) is 21 nM. Furthermore, probe P1 has been successfully applied for the efficient and rapid PhSH detection in environmental water and actual food samples.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Ziqing Zhu,Yinying Dai,Rui Zhang,Jiaqi Shi,Xuesheng Zhang,Bingxiang Liu,Mingbao Feng
Polychlorinated dibenzothiophenes (PCDTs) are a class of compounds structurally similar to dioxins that possess various toxicological impacts on living organisms. Unfortunately, information on the levels of PCDTs in freshwater lakes in China is still scarce. In this work, the occurrence of 14 congeners of PCDTs in different matrices (i.e., sediment, suspended particulate matter (SPM), and water) of Chaohu Lake was investigated. It was determined that the concentrations of 14 PCDTs (Σ 14 PCDTs) in the sediment, SPM, and surface water were 0.40–3.55 ng g −1 (dry weight, d.w.), 0.38–2.95 ng·g −1 d.w., and 0.34–2.61 ng L −1 , respectively. The dominant congener found in sediments was 1,2,3,4,7-penta-CDT (19.54%), and 1,3,9-tri-CDT was the predominant congener in SPM (19.13%) and water (20.08%). Medium- and high-chlorinated PCDTs were detected as the major compounds in sediments and SPM. The low-chlorinated PCDTs (e.g., mono-CDTs) have higher relative percentages in the water than those detected in the sediment samples. The annual Σ 14 PCDT input of the eight main tributaries to Chaohu Lake was 19.90 kg. A strong linear correlation between the Σ 14 PCDT levels and the organic carbon (OC) content demonstrated that OC had an important influence on the PCDT redistribution in Chaohu Lake. In addition, the organic carbon normalized partitioning coefficient (log K OC ) of PCDTs in the SPM-water system in Chaohu Lake was 1.95–2.49 mL g −1 , and correlations between log K OC and other typical environment-related properties of PCDTs were established. This study provided useful data on the evaluation of ecological risks of PCDTs in Chaohu Lake.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Youru Yao,Xin Hu,Yong Zhang,Huan He,Shiyin Li
Ferrous sulfide (FeS) and humic acid (HA) are typical black substances in black bloom water. Based on the strong reduction ability of FeS and the photosensitivity of HA, the transformation of toxic organic pollutants by the combination of FeS and HA (HA-FeS) is not clear. In order to explore this issue, the stability of HA-FeS was analyzed by measuring the hydrodynamic diameter and zeta potential of HA-FeS, and then the removal mechanism and possible degradation pathway of tetrabromobisphenol A (TBBPA) by HA-FeS under continuous illumination were discussed. The results showed that the hydrodynamic diameter of FeS was reduced and the stability of FeS was improved, and it was easily suspended after FeS combined with the HA in the water. The combination of HA and FeS promoted the removal of TBBPA in water, no matter it was in the presence or absence of light. Besides, compared with the absence of light, the removal efficiency of TBBPA was improved by HA-FeS with continuous light. There were two reasons for the increase in the removal efficiency of TBBPA by HA-FeS. On the one hand, Fe 2+ and S 2− of HA-FeS had more stable chemical valence and obtained better reducibility under continuous light than that in the dark. On the other hand, light induced the release of active species ( O 2 − , 1 O 2 , and OH) in the HA-FeS composite colloid and further promoted the degradation of organic pollutants. Therefore, the black substances (FeS) of black blooms may play a beneficial role in the removal of pollutants under sunlight.
研究领域:
环境科学
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yingnan Liu,Qinzhi Wang,Shuwen Guo,Pei Jia,Yuhang Shui,Siyu Yao,Chen Huang,Min Zhang,Li Wang
Hydroquinone (HQ) is a major phenol compound pollutant derived from industrial wastewater. Its content in environmental water is closely related to the water quality. Thus, it is in great need to develop facile, sensitive and selective detection methods for HQ. In this paper, an effective and selective HQ detection probe was fabricated based on novel silicon quantum dots (SiQDs), which were synthesized by a one-step hydrothermal method. Such SiQDs exhibited good water solubility and intensely green fluorescence. Interestingly, their fluorescence can be significantly quenched upon addition of HQ, which is attributed to the electron transfer from SiQDs to the generated 1,4-benzoquinone, and the inner filter effect of SiQDs-1,4-benzoquinone complex. This SiQD probe can detect HQ in a wide concentration range from 6 to 100 μM, with a detection limit of 2.63 μM. More importantly, compared with other reported methods, this probe can eliminate the interference from catechol (CC) and resorcinol (RS), and gives new insight on the discrimination HQ from its isomers. Furthermore, this fluorescent probe was also successfully applied for the determination of HQ in real water samples with satisfactory recoveries, indicating the reliability and potential application of this fluorescent probe for monitoring HQ.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2014
·
IF 2.354
Yajie Jiang,Tao Geng,Qiuxiao Li,Guojin Li,Hongbin Ju
The salt-free catanionic surfactant dodecyltrimethylammonium decanoate (DTAD) was synthesized by a novel method. Phase behavior and phase structure of DTAD with water at full concentration range were studied at 20–45 °C, using differential scanning calorimetry (DSC), freeze-fracture transmission electron microscopy (FF-TEM), polarization microscopy, and small-angle X-ray diffraction (XRD) techniques. The DTAD–water system formed a large aqueous multi-phase region, a large lamellar liquid crystal (L α phase) region, and a hydrated crystal phase. The densely packed vesicles and the lamellar structure induced the formation of aqueous multi-phase region. With increasing temperature, the multi-phase region and the L α phase region reduced, and the isotropic solution phase (L 1 phase) appeared.
研究领域:
表面化学
·
胶体科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Penggang Pei,Tao Sun,Yingming Xu,Yuebing Sun
Mercury (Hg) contamination in water and soil is of great concern due to its high toxicity and biomagnification in food chain. In this study, clay mineral montmorillonites (Mt) was thiol-functionalized via 2–mercaptoethylammonium intercalation (ISH–Mt) and 3–mercaptopropyltrimethoxysilane surface grafting (GSH–Mt) for enhancing remediation ability of Hg contamination. Characterization results indicated that surface grafting significantly changed surface morphology and porous structure , with rougher surface, larger specific surface area and more porous structure. The adsorption capacity of Hg 2+ was significantly enhanced by thiol functionalization, being 141.55 and 136.92 mg g −1 for ISH–Mt and GSH–Mt, respectively. Fitting results of pseudo-second-order kinetic models ( R 2 = 0.879– 0.930) and Freundlich isotherms ( R 2 = 0.900– 0.950) indicated that Hg 2+ was adsorbed on heterogeneous surfaces with chemical processes as the rate-limiting step. TCLP-Hg concentrations in soils after applying ISH–Mt and GSH–Mt (0.1%–1% dosage, m/m ) were < 200 μg L −1 (The Leaching Standards of Hazardous Wastes , USEPA). Hg fractionation shifted from mobile fractions (exchangeable and carbonate-bound) to stable forms (organic matter-bound). XPS and Hg L III -edge EXAFS studies revealed that the complexation of –SH toward Hg was the primary mechanism for Hg adsorption and stabilization. These results illustrated that thiol-functionalized Mts prepared by intercalation and surface grafting are promising for the remediation of Hg-contaminated water and soil.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2022
·
IF 2.731
Quan Zeng,Ting Xu,Qinshu Kang,Shengqing Li
The existence of inorganic elements in natural water is heterogeneous due to the suspended micro colloidal and nanoparticles. In this work, the signals of Fe, Cu, Cd, Pb content in natural water samples collected from a city lake were examined using the single-particle inductively coupled plasma mass spectrometry (ICP-MS) under the time resolved detection mode. Total numbers, data distributions and central values of the detected signals were obtained based on statistical analysis using the Excel and the Origin software. Both fractionation filtration (0.22, 0.45 and 3.0 µm membranes) and centrifugation (2000, 4000, 6000 and 8000 rpm rotating speed) have a significant effect on the detection of metals coexisted in the natural colloidal particles (NCPs) in water. Notable number of single-particle signals still presents in the lake water samples even after the pretreatment of 0.22 µm filtration or 8000 rpm centrifugation, which reveals the ubiquitous existence of micro aggregates or colloids in natural water. Sampling with online dilution is proved to be a direct, simple and effective method for the implementation of time resolved analysis of metallic micro NCPs in lake water by ICP-MS, especially for elements with high dissolved concentration. The results enhance the knowledge of how-to evaluation of the quantity and chemical stability of metal-containing aggregates, colloids and nanoparticles that may exist in natural water.
研究领域:
环境科学
·
分析化学
✓ 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）