ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Jinhui Liu,Jiasen Cui,Xing Wei,Weitao Li,Chunran Liu,Xuewen Li,Mingli Chen,Yu Fan,Jianhua Wang
It is the first time to investigate local distribution patterns of mercury (Hg) in mice organs after Hg and Se exposure with detection of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Two batch of adult mice were employed to be exposed to inorganic mercury (iHg) and methylmercury (MeHg) with or without Se at the dose of 55 μmol kg −1 . Tissue sections of brain, kidney, liver, and spleen from one batch mice were prepared to get local imaging of Hg by LA-ICP-MS. Tissues from another batch mice were used to quantify Hg and Se in tissues with ICP-MS after acid digestion . The results indicated that, for mice exposed to iHg, Hg mainly distributed in kidney, a little in liver, and hardly in brain and spleen; for mice exposed to MeHg, lower amount of Hg was found in kidney, liver and spleen, and almost no Hg was found in brain. It was interesting that for Hg and Se co-administration groups, higher level of Hg was observed in kidney, liver, spleen and even in brain than single Hg administration groups. In addition, Se level in organ tissues increased obviously not only in Se exposure group but also in MeHg exposure group, while the phenomenon was not observed in iHg exposure group. HepG2 cells were employed to investigate Se and Hg interactions in single cell level, similar bioaccumulation behavior of Hg was found between cells and mice organs. Higher level of Hg was observed in cells cultured with Se and Hg medium than cells cultured with single Hg medium. The results are expected to provide new insight to investigate Hg and Se interactions in animal bodies and in-vitro cells.
研究领域:
环境科学
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毒理学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Chengcheng Liu,Rui Chen,Fengmao Liu,Zhiqiang Gao,Xiaohan Li,Yue Wang,Shiyu Wang,Yuyan Li
Grapes' growth and processing conditions have various effects on pesticides with different physicochemical properties. Therefore, it is important for the healthy human diet to investigate pesticide residue behavior. To explore the relationship between pesticide residue behavior and physicochemical properties, the distribution of ten pesticides and one metabolite on grape peel and pulp was examined and the results showed that pesticides with low octanol–water partition coefficient (Kow) were more likely to be transferred to the pulp as the harvest interval increases. The removal methods were ranked according to pesticide removal effectiveness as follows: peeling > ozone water washing > tap water washing. Furthermore, the logKow played a key role in pesticide transfer rates during the juicing and winemaking. Notably, drying was the process of increasing pesticide residues. Additionally, the prediction models for the PFs of the pesticides in the juicing and winemaking processes were constructed as PFj = 0.952–0.116logKow (r = 0.886) and PFw = 0.736–0.143logKow (r = 0.959) by stepwise regression analysis. The prediction models recommended that Kow could be used to predict pesticide residues in grape juice and wine, which can predict the effect of pesticide physicochemical properties on PFs.
研究领域:
食品科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Central South University
·
2023
·Vol. 30
·期 5
·1523-1538
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IF 4.4
Xu Jia-qi,Liu Wei,Jiao Fen,Han Jun-wei,Qin Wen-qing,Cai Can
Pyrolysis is a promising technology to treat waste printed circuit boards (WPCBs) with significant advantages of full source utilization, high separation efficiency and scarce pollutant emissions. In this work, TG and DTG analyses were performed to determine pyrolysis characteristics. The kinetic analysis adopting the Starink Kissinger-Akahira-Sunose (SKAS) model was conducted to confirm the apparent activation energy ( E α ). Pyrolysis products were collected using a lab-scale pyrolyzer. GC-MS analysis coupled with MS-DIAL data processing was applied to clarify the distribution pattern of valuable liquid products. The results indicated that the main thermal decomposition of WPCBs occurred within the temperature range of 157–664 °C, with E α ranging from 80.70 to 279.46 kJ/mol. During pyrolysis, the WPCBs were converted into three kinds of products, in which solid and gas products could be applied in the field of materials and energy. The composition of WPCBs oil products was complicated and sensitive to the pyrolysis temperature. The largest proportion of valuable liquid products (82.94%) was obtained at 600 °C, containing 52.87% monocyclic aromatic phenols, 4.39% polycyclic aromatic phenols, 3.07% brominated phenols, and 22.61% hydrocarbons, respectively. These valuable liquid products would be an attractive alternative as raw materials for the synthesis of phenolic resins and the production of petrochemicals.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
Engineering
·
2023
·
IF 12.8
Ning Li,Haoxi Dai,Mengting He,Jun Wang,Zhanjun Cheng,Beibei Yan,Wenchao Peng,Guanyi Chen
The distribution pattern of metals as active centers on a substrate can influence the peroxymonosulfate (PMS) activation and contaminants degradation. Herein, atomic layer deposition is applied to prepare Cu single atom (SA-Cu), cluster (C-Cu), and film (F-Cu) decorated MXene catalysts by regulating the number of deposition cycles. In comparison with SA-Cu-MXene (adsorption energy ( E ads ) = −4.236 eV) and F-Cu-MXene ( E ads = −3.548 eV), PMS is shown to adsorb preferably on the C-Cu-MXene surface for activation ( E ads = −5.435 eV), realizing higher utilization efficiency. More SO 4 − · are generated in C-Cu-MXene/PMS system with steady-state concentration and 1–3 orders of magnitude higher than those in the SA-Cu-MXene and F-Cu-MXene activated PMS systems. Particularly, the contribution of SO 4 − · oxidation to sulfamethoxazole (SMX) degradation followed the order, C-Cu-MXene (97.3%) > SA-Cu-MXene (90.4%) > F-Cu-MXene (71.9%), realizing the larger SMX degradation rate in the C-Cu-MXene/PMS system with the degradation rate constants ( k ) at 0.0485 min −1 . Additionally, SMX degradation routes in C-Cu-MXene/PMS system are found with fewer toxic intermediates. Through this work, we highlighted the importance of guided design of heterogeneous catalysts in the PMS system. Appropriate metal distribution patterns need to be selected according to the actual water treatment demand. Metal sites could be then fully utilized to produce specific active species to improve the utilization efficiency of the oxidants.
研究领域:
环境科学
·
催化化学
✓ 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）