INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Hongyang Zhou,Qiang Xie,Yihuan Zhou,Dingcheng Liang,Jinchang Liu,Bingjie Wang,Yutong Sha,Shimei Gu
During the purification of industrial organic emissions containing reactive volatile organic compounds (VOCs) such as styrene by activated carbon (AC) adsorption, it is a common phenomenon that desorption of VOCs from AC is hindered by heel, the VOCs, and/or VOC-derived matters accumulating in AC pores. Herein, heel was extracted with the aid of supercritical dichloromethane and was characterized in detail to identify its composition. Then, the thermal behavior and effects of heel on the pore structure, morphology, and surface chemistry of spent AC and regenerated AC were studied. The results show that the accumulating styrene in micropores reacted and formed a heel. The presence of metal elements and acidic functional groups may initiate or promote the polymerization of styrene. The dominant component of the heel was triphenylbenzene, and its formation process could be depicted by the Mayo polymerization mechanism.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 17
·5225
·
IF 4.412
Lei Chu,Yongcui Wang,Bin Huang,Jian Ma,Xin Chen
In this study, broilers were fed with heavy-metal-containing diets (Zn, Cu, Pb, Cr, As, Hg) at three rates (T1: 5 kg premix/ton feed, T2: 10 kg premix/ton feed and T3: 15 kg premix/ton feed) and Doxycycline (DOX) and Gatifloxacin (GAT) at low or high doses (T4: 31.2 mg DOX/bird/day and 78 mg GAT/bird/day, T5: 15.6 mg DOX/bird/day and 48 mg GAT/bird/day) to assess the accumulation of various heavy metals and the fate of two antibiotics in broiler manure after 35 days of aerobic composting. The results indicated that the two antibiotics changed quite differently during aerobic composting. About 14.96–15.84% of Doxycycline still remained at the end of composting, while Gatifloxacin was almost completely removed within 10 days of composting. The half-lives of Doxycycline were 13.75 and 15.86 days, while the half-lives of Gatifloxacin were only 1.32 and 1.38 days. Based on the Redundancy analysis (RDA), the concentration of antibiotics was significantly influenced by physico-chemical properties (mainly temperature and pH) throughout the composting process. Throughout the composting process, all heavy metal elements remained concentrated in organic fertilizer. In this study the Cr content reached 160.16 mg/kg, 223.98 mg/kg and 248.02 mg/kg with increasing premix feed rates, similar to Zn, which reached 258.2 mg/kg, 312.21 mg/kg and 333.68 mg/kg. Zn and Cr concentrations well exceeded the United States and the European soil requirements. This experiment showed that antibiotic residues and the accumulation of heavy metals may lead to soil contamination and pose a risk to the soil ecosystem.Keywords:Doxycycline;Gatifloxacin;heavy metal;composting;degradation;accumulation
研究领域:
环境科学
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农业科学
·
土壤学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Huijun Su,Shaobo Shi,Ming Zhu,Jianhua Li,Guanyong Su
Liquid crystal monomers (LCMs) have been proposed to be persistent, bioaccumulative, and toxic (PBT) substances; however, there is a dearth of information regarding their occurrence in sediment samples. Here, an analytical method was developed for the quantitative determination of LCMs in sediment samples, and n = 76 sediment samples were collected and analyzed to determine accurate concentrations of LCMs. Our results indicated that the developed pretreatment procedure was applicable for the determination of LCM concentrations in sediments. We observed that LCMs were detected in 75 out of the 76 sediment samples, and 23, 18, and 14 out of the 39 target LCMs were quantified in at least one of the analyzed sediments from rivers around LCM or liquid crystal device (LCD) manufacturers, Taihu Lake, and rivers around e-waste recycling sites, respectively. The LCMs in the samples from rivers around LCM/LCD manufacturers exhibited the greatest mean concentrations of 26.1 ng/g dry weight (dw), followed by those from e-waste recycling site areas (1.15 ng/g dw) and Taihu Lake (0.076 ng/g dw). Collectively, this study provided the first analytical method that was able to quantify the concentrations of LCMs in sediment samples and provided the first evidence for the occurrence of LCMs in sediment samples.
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
International Journal of Environmental Research and Public Health
·
2022
·Vol. 19
·期 15
·9382
·
IF 4.614
Wenxin Liu,Hong Zhang,Jiaqi Ding,Wanyu He,Lin Zhu,Jianfeng Feng
Organophosphate esters (OPEs) are widely used as an additive in flame retardants, plasticizers, lubricants, consumer chemicals, and foaming agents. They can accumulate in aquatic organisms from water (waterborne exposure) and food (dietary exposure). However, the bioaccumulation characteristics and relative importance of different exposure routes to the bioaccumulation of OPEs are relatively poorly understood. In this study,Daphnia magnawere exposed to fo typical OPEs (tris(2-chloroethyl) phosphate (TCEP), tris(1,3-dichloro-2-propyl) phosphate (TDCIPP), tris(2-butoxyethyl) phosphate (TBOEP), and triphenyl phosphate (TPHP)), and their toxicokinetics under waterborne and dietary exposure routes were analyzed. For the waterborne exposure route, the bioconcentration factors (BCFs) increased in the order of TBOEP, TCEP, TDCPP, and TPHP, which were consistent with their uptake rate constants. TPHP might have the most substantial accumulation potential while TBOEP may have the smallest potential. In dietary exposure, the depuration rate constants of four OPEs were different from those in the waterborne experiment, which may indicate other depuration mechanisms in two exposure routes. The biomagnification factors (BMFs) of fur OPEs were all below 1, suggesting trophic dilution in the transfer of four OPEs fromScenedesmus obliquustoD. magna. Except for TBOEP, the contributions of dietary exposure were generally lower than waterborne exposure inD. magnaunder two exposure concentrations. This study provides information on the bioaccumulation and contribution of OPEs inD. magnavia different exposure routes and highlights the importance of considering different exposure routes in assessing the risk of OPEs.
研究领域:
环境科学
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生态毒理学
✓ 已验证
DOI
高影响因子
BIOMEDICAL CHROMATOGRAPHY
·
2025
·Vol. 39
·期 5
·e70068
·
IF 1.7
Sanwen Li,Qing Shao,Hongqun Qiao
Schisandrin B (Sch B), a natural lignan extracted from schisandra chinesis, has exhibited various pharmacological activities including anticancer effects. However, studies on the preclinical toxicokinetic profile of Sch B have not been publicly reported. This study aimed to investigate the preclinical concomitant toxicokinetics of multiple administration of Sch B. Sch B was administered orally to rats and dogs at 150, 300, and 600 mg/kg/day and 50, 100, and 200 mg/kg/day, respectively, for 26 weeks. Plasma concentrations of Sch B were determined by a validated HPLC–MS/MS method. According to the toxicokinetic results, significant gender differences were observed in the rats, and females had higher exposures than males for each dosing group. Toxicokinetic analysis demonstrated a notable accumulation in the plasma of dogs during the repeated administration of Sch B, and the degree of accumulation increased with the increase of the dose. The findings of this study indicated that there were differences in the concomitant toxicokinetics of Sch B between rats and dogs. These results can inform clinical studies and provide valuable insights for future human Sch B risk assessments.
研究领域:
药理学
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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
CONSTRUCTION AND BUILDING MATERIALS
·
2019
·
IF 4.046
Haoxia Ma,Hongfa Yu,Jinliang Tian,Yongshan Tan,Bo Da
Icing pressure testing was conducted to investigate the icing pressure ( I p ) of chloride-based deicers and discuss the relation between I p and the freeze-thaw deterioration of concrete induced by chloride deicers. During the icing pressure test, when the solution transformed from the liquid to the solid phase, undercooling occurred, and the heat of the liquid-solid phase transformation was released. The I p of chloride deicers and water reached a plateau near −30 °C. The stable I p value of water was the highest of that of the chloride solutions followed by that of 3.5% NaCl; the I p of 3.5% CaCl 2 was slightly higher than that of 3.5% MgCl 2 . The concept of the I p cumulative effect with time ( S ) was first proposed to determine the freeze-thaw destruction induced by chloride-based deicers. The durable life of the concrete exposed to chloride-based deicers decreased with the S of the deicers, and the mass loss of the concrete increased with the S of the deicers.
研究领域:
材料科学
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土木工程
✓ 已验证
产品关联
DOI
高影响因子
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2016
·Vol. 71
·期 1
·87-96
·
IF 2.039
Gao Mi,Klerks Paul L.,Wu Xing,Chen Hongxing,Xie Lingtian
This study assessed the contamination extent and potential ecological and human health impacts for chromium (Cr), manganese (Mn), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) in sediments and indigenous benthic organisms along the coastal area of Huludao, China. We analyzed a total of eight species: two benthic fish species, two bivalves, two snails, and two decapod crustaceans. Cu, Zn, and Cd levels in sediment exceeded the Chinese marine sediment quality criteria. The geoaccumulation index was highest for Cd followed in a decreasing order by Zn, Pb, Cu, Ni, and Cr. Metal levels were highest in the four mollusk species. The oyster and veined rapa whelk had the highest bioaccumulation factors, indicating that these two species would be well suited for monitoring the metal pollution in this area. Our comparison of estimated daily intake values for human consumption of the seafood species to the Food and Agricultural Organization-recommended daily dietary allowances indicate potential health risks from the intake of Cd from all shellfish other than our crab species and Zn intake from oyster consumption. An analysis of target hazard quotients identified noncarcinogenic health risks from Cd (in all shellfish analyzed except for our crab species), Cu, and Zn (in oysters and veined rapa whelks). Moreover, an analysis of cancer risk from Pb ingestion detected an increased risk for consumption of all shellfish except for the crab species. Health risks seem especially pronounced for the consumption of oysters and the veined rapa whelks; a seafood advisory may be warranted for these mollusks.
研究领域:
环境科学
·
生态毒理学
·
公共健康
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Peng Liu,Xiaowei Wu,Huanhuan Shi,Hanyu Wang,Hexinyue Huang,Yanqi Shi,Shixiang Gao
Microplastics (MPs) in the environment would undergo extensive weathering, which can act as a vector affecting the accumulation of pollutants in organisms. However, the risk of organic pollutants adsorbed on aged MPs to marine organisms is poorly understood. This study revealed the contribution of aged polystyrene (PS) MPs to the total bioaccumulation of atorvastatin (ATV) and amlodipine (AML), and assessed the environmental risks via experimental and model analysis. The results showed that pharmaceuticals were more easily released in gastrointestinal fluids from aged MPs relative to that in simulated seawater. The hydrophobic pharmaceuticals were more bioaccessible than hydrophilic ones by organisms. Model analysis showed that ingestion of water and food were the most important uptake routes for pharmaceuticals in marine fish and seabirds, while aged PS MPs could decrease the bioaccumulation of pharmaceuticals (contributed for −2.9% and −1.2% for the total uptake of ATV, and −25.8% and −4.4% for AML), indicating the cleaning effect of aged MPs, and the potential higher exposure risks of pharmaceuticals in warm-blooded organisms than that in cold-blooded ones via ingested MPs. The study revealed the effect of aged MPs to the bioaccumulation of pharmaceuticals in marine organisms, and highlighted the combined risks of aged MPs and pharmaceuticals in the environment.
研究领域:
海洋生物学
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Xun Liu,Shang-Qing Zhang,Zi-Han Cheng,Xing Wei,Ting Yang,Yong-Liang Yu,Ming-Li Chen,Jian-Hua Wang
A highly sensitive platform is developed for the determination of microRNA-21 (miRNA-21) with inductively coupled plasma mass spectrometry (ICPMS). It includes the following operations: Hairpin structures DNA H1 and H2 are designed, and DNA H1 is bound to ultrasmall lanthanide upconversion nanoparticles (UCNPs) to produce UCNPs@DNA conjugate probes. Target miRNA triggers a chain reaction for alternating hybridization between DNA H1 (bound on UCNPs@DNA probe) and DNA H2. This leads to UCNPs accumulation and serves as an efficient amplification strategy for UCNPs. The concentration of miRNA-21 is closely correlated to the number of UCNPs; thus, the detection of 89Y by ICPMS provides a promising approach for miRNA quantification. This protocol exhibits high sensitivity to miRNA-21 within 0.1–500 fM, along with a detection limit of 41 aM, which is among the hitherto reported most sensitive procedures. It is worth mentioning that rare earth elements are scarcely present in living systems, which minimizes the background for ICPMS detection and excludes potential interferences from the coexisting species, which is most suited for biological assay.
研究领域:
生物化学
·
分析化学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Hui Chen,Xu Han,Chunyou Zhu,Bibai Du,Lei Tan,Rong He,Mingjie Shen,Liang-Ying Liu,Lixi Zeng
Fluorescent brighteners (FBs) are extensively used as important chemical additives in multiple industrial fields worldwide. The history of the use of global FBs spans over 60 years, but knowledge on their environmental occurrence and risks remains largely unknown. Here, we screened indoor dust and hand wipes from South China for a broad suite of 17 emerging FBs using a new comprehensive analytical method. All 17 FBs were detected in the indoor environment for the first time, most of them having been rarely investigated or never reported in prior environmental studies. Ionic FBs were found to be more abundant than nonionic ones. The median total concentrations of the 17 detectable FBs reached 11,000 ng/g in indoor dust and 2640 ng/m2 in hand wipes, comparable to or higher than those of well-known indoor pollutants. Human exposure assessment indicated that hand-to-mouth contact is a significant pathway for exposure to FBs, with a comparable contribution to that of dust ingestion. Most of the newly identified FBs are predicted to have persistent, bioaccumulative, or toxic properties. Our work demonstrates that FBs are another class of highly abundant, hazardous, and ubiquitous indoor pollutants that have been overlooked for decades and points to an emerging concern.
研究领域:
环境科学
·
公共卫生
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Qimeng Jiang,Bichong Luo,Zhengguo Wu,Xiaoying Wang
Silver nanoparticles (AgNPs) have been widely used for sterilization due to their broad-spectrum bactericidal properties. However, there exist the problems of premature releasing and accumulative toxicity when free AgNPs are applied. This study proposed a one-pot hydrothermal strategy to synthesize carbon spheres immobilized silver nanoparticles (AgNPs@CS). The synthesis involves with silver ammonia solution as Ag precursor, and corn stalk as green reducing agent and carbon precursor. Furthermore, AgNPs@CS was anchored by cellulose nanofibers (CNF) to obtain the antibacterial composite paper. The obtained CNF/AgNPs@CS paper exhibited superior antibacterial properties against E. coli and S. aureus . Notably, the accumulative release rate of AgNPs from AgNPs@CS was 10.2% in 9 days, while that from CNF/AgNPs@CS paper was only 6.7% due to the anchoring effect of both CS and CNF, which was low for avoiding the cumulative toxicity problem. In addition, the mechanical and barrier properties of CNF/AgNPs@CS paper were also improved by 29.4% (tensile index), 2.7% (tear index), 7.4% (burst index), 10% (folding endurance), 0.8% (water vapor transmission) and 9.4% (oxygen transmission rate), respectively. Therefore, the composite paper has potential application as a medical antibacterial material.
研究领域:
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
Green Processing and Synthesis
·
2021
·Vol. 10
·期 1
·874-881
·
IF 2.83
Xin Zhou,Ge Gao,Guangxiang He,Xiaoyan Guo,Haibo Jin,Lei Ma
The side-chain alkylation of cumene and ethylene over a solid superbase catalyst K/KOH/ γ -Al 2 O 3 is investigated. The effects of the reaction temperature, pressure, and time on the conversion of cumene and selectivity of tert -amylbenzene (TAB) are discussed. The experimental results show that the conversion of cumene to tert -pentylbenzene increases with the increase in reaction temperature and ethylene pressure. The catalytic reaction has certain operational flexibility in terms of the reaction temperature, pressure, and time. In addition, the catalytic reaction can achieve directional conversion. The optimum operating conditions are obtained using a single factor test. The conversion of cumene is 99.8% and the selectivity toward TAB is 97.9% under catalyst concentration of 4 wt%, reaction temperature of 55°C, reaction pressure of 0.45 MPa, and reaction time of 30 min. The deactivation of catalyst is mainly caused by oxygen and water in the raw material.
研究领域:
催化化学
·
有机合成
✓ 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）