FOOD CHEMISTRY
·
2024
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IF 8.5
Siying Che,Yao Fan,Xuemei Hu,Linlin Yin,Haiyan Fu,Yuanbin She
A novel fluorescent probe was fabricated using fluorescein-based ionic liquids (ILs) to effectively achieve rapid and accurate detection of Hg 2+ and CH 3 Hg + in food. A probe developed by addition of modified fluorescein into the functionalised ILs presented a promising sensitivity toward Hg 2+ and CH 3 Hg + at concentrations of 0.4 and 60 nM, respectively. In addition, the novel probe could achieve visual and timely detection of Hg 2+ and CH 3 Hg + by the naked eyes at concentrations of 0.1 and 1 μM, respectively. The probe could also overcome the interference of potential ions and common organic ligands and detect Hg 2+ and CH 3 Hg + in real food samples, such as green tea and liquor. The probe could be converted into a paper-based sensor to visually detect Hg 2+ and CH 3 Hg + at levels as low as 10 nM.
研究领域:
分析化学
·
食品安全
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2020
·
IF 6.785
Hao Wang,Xiuli Wang,Maosheng Liang,Guang Chen,Rong-Mei Kong,Lian Xia,Fengli Qu
Mercury detection remains an important task because of its high toxicity. Herein a new dual-signal probe based on a boric acid (BA)-functionalized lanthanide metal–organic framework (BA-Eu-MOF) was developed for the detection of Hg2+ and CH3Hg+ ions for the first time. The BA-Eu-MOF was synthesized by coordination of Eu3+ with 5-boronobezene-1, 3-dicarboxylic acid (5-bop) through a one-pot method. The 5-bop ligand not only acted as the “antenna” to sensitize the luminescence of Eu3+ but also provided reaction sites for Hg2+ and CH3Hg+. Owing to the electron-withdrawing effect of the BA group, the “antenna” effect of the ligand was passivating and the BA-Eu-MOF showed weak red emission in water. Upon addition of Hg2+ or CH3Hg+ into the system, a transmetalation reaction took place, i.e., BA groups were replaced by Hg2+ or CH3Hg+; therefore, the “antenna” effect of the ligand was triggered, leading to the enhancement of red emission. As Hg2+ or CH3Hg+ concentration increased, the red emission was gradually enhanced, and the color change was also observed with the naked eye under 365 nm ultraviolet light. Owing to the porous characteristics and the surface effect of the MOF, as well as the unique transmetalation reaction between the BA group and Hg2+ or CH3Hg+, the developed nanoprobe showed excellent characteristics for simultaneous detection of Hg2+ and CH3Hg+, such as simple preparation, convenient operation, “turn-on” signal output, high sensitivity, and selectivity. The unique features of the BA-Eu-MOF make it an attractive probe for monitoring Hg2+ and CH3Hg+.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Penggang Pei,Yingming Xu,Lin Wang,Xuefeng Liang,Yuebing Sun
The preparation of low-cost and highly efficient functional materials for the cleanup of mercury-contaminated water by adsorption in an environmentally friendly way is of great significance. In this study, thiol-functionalized montmorillonite (BSH–MMT) was prepared by a novel one-step mechanochemical grafting method and applied to aqueous Hg 2+ and CH 3 Hg + adsorption. Characterization results showed that thiol groups were successfully grafted by chemical bonding with Si–OH or broken Si O bonds. The maximum adsorption capacities of BSH–MMT for Hg 2+ and CH 3 Hg + were 104.79 mg g −1 and 39.27 mg g −1 , which were approximately seven- and nine-fold that of pristine MMT, respectively. Adsorption kinetics and isotherm fitting indicated that Hg 2+ adsorbs heterogeneously, while CH 3 Hg + proceeds through monolayer adsorption, both with chemical adsorption as the rate-limiting step. BSH-MMT maintained high adsorption performance over a wide pH range and in the presence of humic acid because of the high affinity of thiol groups toward mercury. The primary adsorption mechanism of thiol-ligand complexation was confirmed by the results of X-ray photoelectron spectroscopy and X-ray absorption spectra, in which a complex structure of bis-coordinated S–Hg–S (2.30 Å distance) was observed. These results demonstrated that mechanochemical grafting is a promising one-step method to prepare thiol-functionalized montmorillonite for effective cleanup of Hg 2+ /CH 3 Hg + contamination in water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yingqi Xia,Lijia Liu,Yudan Wang,Chunhong Zhang,Yawen Liu
CH 3 Hg + in water is a neurotoxin that is difficult to eliminate and is readily absorbed by the human body through food chains. In this study, thioctic acid was grafted onto the surface of NH 2 -MIL-101 via an amidation reaction to prepare an adsorption material for the rapid and effective removal of CH 3 Hg + , which is designated as LA-MIL-101.The synthesis of LA-MIL-101 was confirmed through analyses including FT-IR, XRD, SEM, TGA, and XPS. BET results indicate that the specific surface area of LA-MIL-101 is 464.92 m 2 ·g −1 . The ideal conditions for CH 3 Hg + adsorption were explored by varying environmental factors such as pH, contact time, and temperature. Furthermore, the introduction of sulfur significantly enhanced the adsorption capacity for CH 3 Hg + . Batch adsorption experiments demonstrate that LA-MIL-101 exhibits an exceptionally rapid adsorption rate, achieving over 88.3 % of the total removal rate within just one minute. Additionally, LA-MIL-101 shows remarkable adsorption efficacy across a broad pH range. The adsorption behavior of LA-MIL-101 for CH 3 Hg + aligns with the Elovich and Langmuir models, with a maximum adsorption capacity reaching 1391.77 μg·g −1 . LA-MIL-101 also displays a strong anti-interference capability in environments containing humic acid or Na + . Notably, it maintains high removal efficiency under conditions involving coexisting cations, as well as in simulated surface water, simulated groundwater, and natural seawater. Moreover, LA-MIL-101 demonstrates good stability and recyclability, retaining effective adsorption after five adsorption/desorption cycles. XPS results elucidate the adsorption mechanism of CH 3 Hg + , highlighting interactions with sulfur (S) and nitrogen (N) atoms. Overall, LA-MIL-101 exhibits high practicality and significant potential for application in the emergency treatment of CH 3 Hg + in aquatic environments.
研究领域:
环境科学
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材料科学
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毒理学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Man-Qing Yang,Cai-Ping Zhou,Yun Chen,Jian-Jiang Li,Cheng-Hui Zeng,Shengliang Zhong
A new dinuclear europium cluster (Eu-cluster) is synthesized and the exact structure is determined by single-crystal X-ray diffraction. The formula of the Eu-cluster is determined to be [Eu 2 (4-Msal) 6 (phen) 2 (H 2 O) 2 ] (4-Msal = 4-methylsalicylic acid, phen = phenanthroline), it crystallizes in the triclinic space group P -1, with a = 9.1193(8) Å, b = 13.0855(10) Å, c = 14.0981(9) Å, α = 103.159(6)°, β = 94.192(6)°, γ = 100.632(7)°, V = 1598.3(2) Å 3 and Z = 1. Further investigation reveals that the Eu-cluster is a highly sensitive and selective methylmercury (CH 3 Hg + ) sensor. To the best of our knowledge, this is the first CH 3 Hg + sensor based on lanthanide clusters/complexes. The responsive behavior shows the sensing has excellent linearity in 1.4–3.8 μg L −1 μM. The LOD for sensing CH 3 Hg + is 0.8 μg L −1 , which meets the standard of Chinese environmental quality standard for agricultural and industrial water. Interestingly, study also reveals the sensor is applicable in real water sensing.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhangchi Xiao,Xueyu Nie,Yong Li,Yulun Nie,Liqiang Lu,Xike Tian
Methylmercury (CH3Hg+) recognition remains a challenging and imperative task due to its high toxicity and wide existence in the ecosystem. Herein, a novel fluorescent covalent–organic framework containing a boric acid functional group (COF-BA) was prepared by a postmodification strategy for CH3Hg+ detection. COF-BA served as a sensing platform for CH3Hg+ with fluorescence static quenching accompanied by fluorescence color changing from intense blue to colorless, and the detection limit was determined as 1.68 μM in a relatively narrow concentration range. COF-BA also exhibited superior selectivity toward CH3Hg+ detection. Furthermore, the spiked and recovery test in real water samples showed its efficient detection practicality. The detection mechanism of COF-BA toward CH3Hg+ was investigated. The recognitive boric acid group in COF-BA was first replaced by CH3Hg+. Then, the quinoline structure that served to limit the rotation of the imine bond was disrupted, leading to dramatic fluorescence quenching. The boric acid functional COF fluorescent probe can be a promising sensing platform for the detection of methylmercury and also provides new ideas for the construction of new fluorescent COF materials.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lixi Chen,Ying Wang,Yaoshuang Wan,Yimin Cai,Yanqi Xiong,Zhenwang Fan,Steven D. Conradson,Haiying Fu,Lihua Yuan,Wen Feng
Pillararenes, a rising star in macrocyclic chemistry, are recognized as promising organic materials for metal ion separation. Herein, three novel pillar[5]arenes ( 1a-c ) appended with N,N -dimethyldithiocarbamoyl groups were designed for highly efficient extraction of aqueous mercury. This work represents the first case of using pillararene-based materials for organic mercury removal, and rather low Hg(II) residue (3.45 ppb) was found in the extraction raffinate of mercury spiked river water after being treated with the as-prepared extractants, which is a rare example of solvent extraction systems that meet the waste water discharge standard (<5 ppb). The extraction performance of the extractant materials was evaluated under different acidities, equilibrium time and sodium nitrate concentrations. High extraction efficiency (>99%) and selectivity (SF Hg/M > 690) were achieved under the optimum condition, and the near quantitative stripping after two contacts enable regeneration of the ligands as well as mercury recovery. The stoichiometric ratio between ligands and Hg 2+ was ascertained to be 1:1 from the slope analysis method and mass spectroscopy. Investigation of the extracted species by NMR, IR, EXAFS techniques and DFT simulation reveals that the C=S moieties of the ligands play a crucial role in metal complexation. It is noted that the as-prepared extractants show excellent recovery and removal ability towards mercury using simulated samples. After extraction by 1c , the total Hg(II) in spiked river samples was reduced to lower than 5 ppb, the maximum tolerable concentration set by China for industrial waste water. This study demonstrates the potential application of N,N -dimethyldithiocarbamoyl modified pillararenes as functional materials for aquatic mercury remediation.
研究领域:
环境科学
·
材料化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Fanshuai Gao,Lijia Liu,Huayu Liu,Yudan Wang,Yawen Liu
In aquatic environments, CH 3 Hg + represents a persistent neurotoxin that proves challenging to eliminate. Despite the extensive efforts made by countries in mercury pollution control, it still poses a significant threat to ecological health in some underdeveloped countries and regions. This study introduces a novel amorphous coordination polymer (BD-ACP-A), synthesized through a coordination reaction involving bis(4-hydroxyphenyl) disulfide, adenine, and Cr(NO 3 ) 3 ·9H 2 O. The resulting material exhibited exceptional adsorption performance for CH 3 Hg + across a wide pH range of 2 to 11. At an initial concentration of 300 ppb, adsorption equilibrium was reached within 30 min, with an adsorption capacity exceeding 1460 μg·g −1 and a removal rate surpassing 98.0 %. BD-ACP-A also demonstrated remarkable anti-interference capabilities, maintaining high adsorption efficiency in the presence of elevated concentrations of humic acid or NaCl, as well as in various real water samples. Furthermore, it exhibited excellent reusability; at an initial concentration of 160 ppb, it retained an adsorption capacity of 718 μg·g −1 and a removal rate exceeding 89.8 % after 10 adsorption-desorption cycles. The adsorption process was well described by the Langmuir isotherm and pseudo-second-order kinetic models, yielding a maximum adsorption capacity of 138 mg·g −1 . Mechanistic investigations utilizing FT-IR, XPS analysis and DFT calculations revealed that the adsorption is primarily driven by the synergistic chelation of sulfur atoms and covalent interactions with nitrogen atoms. This work not only provides a highly efficient adsorbent for CH 3 Hg + pollution control but also presents a novel strategy for designing amorphous polymers with broad pH adaptability and rapid adsorption kinetics.
研究领域:
环境化学
·
材料科学
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污染控制
·
配位聚合物
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Qian Wang,Mingzhe Cai,Yafei Ma,Yanhao Zhang,Sheng Chen,Shusheng Zhang
The development of appropriate molecular tools to monitor different mercury speciation, especially CH3Hg+, in living organisms is attractive because its persistent accumulation and toxicity are very harmful to human health. Herein, we develop a novel activity-based ratiometric SERS nanoprobe to selectively monitor Hg2+ and CH3Hg+ in aqueous media and in vivo. In this nanoprobe, a new bifunctional Raman probe bis-s-s′-[(s)-(4-(ethylcarbamoyl)phenyl)boronic acid] (b-(s)-EPBA) was synthesized and immobilized on the surface of gold nanoparticles via a Au–S bond, in which the phenylboronic acid group was employed as the recognition unit for Hg2+ and CH3Hg+ based on the Hg-promoted transmetalation reaction. In the presence of Hg2+ and CH3Hg+, a new surface-enhanced Raman scattering (SERS) peak aroused from of C–Hg appeared at 1080 cm–1, and the SERS intensity at 1002 cm–1 belonged to the B–O symmetric stretching decreased simultaneously. The quantitative tracking of Hg2+ and CH3Hg+ was realized based on the SERS intensity ratio (I1080/I1303) with rapid response (∼4 min) and high sensitivity, with detection limits of 10.05 and 25.13 nM, respectively. Moreover, the SERS sensor was used for the quantitative detection of Hg2+ and CH3Hg+ in four actual water samples with a high accuracy and excellent recovery. More importantly, cell imaging experiments showed that AuNPs@b-(s)-EPBA could quantitatively detect intracellular CH3Hg+ and had a good concentration dependence in ratiometric SERS imaging. Meanwhile, we demonstrated that AuNPs@b-(s)-EPBA could detect and image CH3Hg+ in zebrafish. We anticipate that AuNPs@b-(s)-EPBA could potentially be used to study the physiological functions related to CH3Hg+ in the future.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）