JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Mina Yang,Haijing Zhang,Fei Chang,Xuefeng Hu
Chlorinated organic compounds are ubiquitously detected in saline waters. The photochlorination of organic compounds is one possible source, and chlorine radicals originating from other photosensitive substances have been reported to be responsible for organic compounds chlorination in previous reports. In this study, benzo[ a ]pyrene (BaP) chlorination in 10% acetonitrile/NaCl aqueous solution was initiated by self-sensitization of BaP, while chlorine radicals were not involved in the reaction. After 45 min of photoreaction in four seawater samples, chlorinated product (6-ClBaP) accounted for 10–17% of the fraction of transformed BaP, which was higher than that previously reported. The influences of Cl − , pH, humic acid , electron donors, and particulate matter on the formation of chlorobenzo[ a ]pyrene were systematically investigated. A self-sensitized photochlorination reaction mechanism was proposed as follow: photoexited BaP was activated to singlet state and then transformed to triplet state through inter-system crossing. Then the excited triplet state and oxygen formed [ 3 BaP*- 3 O 2 ] or [BaP- 1 O 2 ] complex, which further reacted with Cl − to produce 6-ClBaP.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2024
·Vol. 46
·期 8
·1-12
·
IF 3.2
Zhang Zhou,Wang Litao,Liang Hong,Chen Guanyu,Tao Huayu,Wu Jing,Gao Dawen
Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic pollutants with carcinogenic, mutagenic and teratogenic effects. The white-rot fungi in the fungal group have significant degradation ability for high molecular weight organic pollutants. However, exogenous fungi are easily antagonized by indigenous microorganisms. Low molecular weight organic acids, a small molecular organic matter secreted by plants, can provide carbon sources for soil microorganisms. Combining organic acids with white rot fungi may improve the nutritional environment of fungi. In this study, immobilized Trametes versicolor was used to degrade benzo[a]pyrene in soil, and its effect on removing benzo[a]pyrene in soil mediated by different low molecular weight organic acids was investigated. The results showed that when the degradation was 35 days, the removal effect of the experimental group with citric acid was the best, reaching 43.7%. The degradation effect of Trametes versicolor on benzo[a]pyrene was further investigated in the liquid medium when citric acid was added, and the effects of citric acid on the biomass, extracellular protein concentration and laccase activity of Trametes versicolor were investigated by controlling different concentrations of citric acid. In general, citric acid can act as a carbon source for Trametes versicolor and promote its extracellular protein secretion and laccase activity, thereby accelerating the mineralization of benzo[a]pyrene by Trametes versicolor . Therefore, citric acid can be used as a biostimulant in the remediation of PAHs contaminated soil with Trametes versicolor .
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xi Li,Ting Luo,Yaxuan Wang,Bing Wang,Hong Liang,Jiabin Zhou,Lingli Li
Gas-phase ozone (O 3 ) can easily diffuse into soil aggregates and effectively degrade hydrocarbon compounds. However, gas channels in soil impede remediation efficiency. This study developed an enhanced ozonation by applying mechanical agitation (100 and 150 rpm) compared with conventional ozonation (0 rpm), to improve degradation of benzo[a]pyrene (BaP) and soil biodegradability. During ozonation process, O 3 consumption, BaP removal, soil carbon balance, and intermediates of BaP were investigated. Results showed that the enhanced ozonation disturbed gas channels and improved utilization of O 3 . At 90 min, more than 90% of the initial BaP (67.86 mg/kg) was degraded at 100 rpm, while it was 83.61% at conventional ozonation. Enhanced ozonation rapidly oxidized soil organic carbon (SOC), Acetone-n-hexane-extractable organic carbon (AeOC), residual organic carbon (ROC) and BaP into dissolved organic carbon (DOC), which increase of DOC was 31.97% higher than conventional ozonation. Enhanced ozonation accelerated decomposition of BaP to more biodegradable and lower molecular weight intermediates at short time mainly by increasing direct ozonation, which was conducive to the subsequent biodegradation. This work provides an enhanced ozonation to improve the degradation efficiency of BaP in soil by destroying gas channels and enhancing the utilization efficiency of O 3 and direct ozonation.
研究领域:
环境科学
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土壤学
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DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Jiahui Zhu,Shiqi Liu,Yu Shen,Jia Wang,Huiqian Wang,Xinhua Zhan
Microplastics wildly occur in soil and they can become the carriers of persistent contaminants. However, the influence of microplastics on polycyclic aromatic hydrocarbons vertical translocation in the soil system after rainfall is limitedly understood. Here, experiments were conducted to study the influence of polyethylene (PE), polystyrene (PS) and polyvinyl chloride (PVC) microplastics on the leaching behavior and bioavailability of phenanthrene (Phe). The adsorption capacity of phenanthrene on the microplastics followed the order of PS > PE > PVC . The Phe concentrations in the top soil layer after 15 days of leaching with water were 30.25, 28.32 and 27.25 mg kg −1 for the treatments of Phe-PS, Phe-PE and Phe-PVC respectively, which is consistent with the adsorption capacities of microplastics. The concentrations of Phe were correlated with the microplastic adsorption capacities at soil depths of 5–45 cm. Under long-term leaching, Phe could reach the deeper soil layer. Phe concentrations significantly decreased in the leachate over time. Phe concentrations in wheat had a positive correlation with that in leachate/leached top soil layer. Our findings are beneficial to accurately evaluate the ecological risk of the combined contamination of PAHs and microplastics, and improve the understanding of the environmental behaviors of different microplastics.
研究领域:
环境科学
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生态学
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DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jingnan Lu,Ran Wang,Manzi Hu,Kezhou Cai,Xinglan Du,Jieshun Cheng,Haimei Hu,Hui Zhou,Baocai Xu
Benzo( a )pyrene (B( a )P) is a structurally stable and carcinogenic compound, and B( a )P deposition and transport from smoking environment particulates to smoked meat products is a global challenge. In this study, a novel photosensitive bifunctional composite gel (ST/SiO 2 -Mn) was successfully synthesized as a reliable material for reducing PM 2.5 -B( a )P in the smoke environment. B( a )P removal experiments demonstrated that the adsorption and filtration properties of the gel effectively reduced the emission of PM 2.5 -B( a )P in smoke environment. The ST/SiO 2 -Mn gel removed 88.5 % of PM 2.5 -B( a )P in 240 min, which further led to a 59.7 % decrease in B( a )P on the sausage surface. In addition, photocatalytic experiments demonstrated that the ST/SiO 2 -Mn composite could effectively remove B( a )P, and 50 μg/mL B( a )P could be completely degraded within 20 min. Free radical trapping experiments showed that superoxide radicals (•O 2 -) contributed significantly to the degradation process. In conclusion, this study provides valuable insights for effective PM 2.5 -B( a )P degradation without increasing economic burden.
研究领域:
食品安全
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环境科学
·
材料科学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xiang Li,Chang-Ling Sun,Yu Xu,Shi-Hui Shan,Han Zheng,Xiao-Lu Guo,Jiang-Ning Hu
A novel method for benzo(α)pyrene (Bαp) enrichment from an oil matrix was developed by using magnetic nanoparticles (Fe 3 O 4 @dopamine/graphene oxide, Fe 3 O 4 @DA/GO) as extraction absorbents, and the chemical properties of the synthesized nanoparticles were characterized. Various parameters were investigated to optimize the extraction of Bαp from oils. Under optimal conditions (pH, 4; extraction time, 0.5 min; elution solvent, 1 mL; absorbent weight, 20 mg; elution time, 0.5 min), these nanoparticles showed excellent abilities to enrich Bαp from the saponified oil solution and were easily separated by a magnet. High-performance liquid chromatography plus fluorescence detection (HPLC-FLD) was then applied to determine the Bαp content with excellent linearity (R 2 = 0.999). The detection limit was 0.13 µg/kg, while the limit of quantification was 0.42 µg/kg. The spiked recoveries of Bαp in oils ranged from 73.5% to 121%. Compared with previous reports, the proposed method displayed many advantages, including a high efficiency of oil matrix removal, short extraction time, and convenient extraction procedure.
研究领域:
分析化学
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食品安全
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环境科学
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DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Meng Xia,Shuai Zhang,Kaihao Xu,Chengxue Zhang,Xiaocong Wang
In arid and semi-arid areas, the remediation of saline-alkaline soils polluted by organic contaminants is challenging. In this study, the adsorption–photocatalysis synergistic removal of organic contaminants was realised using the MIL-88A(Fe) catalyst, and the saline-alkaline soils were remediated simultaneously. The adsorption isotherm of catalyst conformed to Langmuir model, and the photocatalytic degradation of PHE in an optimal visible light system achieved a PHE degradation efficiency of up to 86.2 % within 30 min. Based on the identification of active oxygen species, the PHE photocatalytic degradation was primarily driven by holes (h + ) and superoxide radicals (·O 2 - ), followed by hydroxyl radicals (·OH) and singlet oxygen ( 1 O 2 ). Furthermore, the determined physical and chemical properties of the saline-alkaline soils indicated that the soil pH value decreased to 6.82, effectively increasing the absorbable nitrogen content and improving soil fertility. This study offers a new strategy for the removal of organic contaminants under special soil medium conditions.
研究领域:
环境科学
·
土壤修复
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DOI
高影响因子
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2024
·
IF 1.9
Gege Zhao,Haoyu Xu,Hai Zhang,Hong Zhang,Yanlan Bi,Xuebing Xu
Crude coconut oil often contains high levels of polycyclic aromatic hydrocarbons (PAHs), which are commonly carcinogenic. The present work demonstrated that PAHs in coconut oil were significantly removed by ionic liquids (ILs). The relationship between the removal efficiency and the structures of ILs was investigated, using 12 different types ILs. Among these, 1-butyl-3-methylimidazolium tosylate ([Bmim][TOS]) showed the highest efficiency in removing benzo(a)pyrene (BaP). The optimal process conditions for the removal of PAHs using [Bmim][TOS] were explored, and the removal efficiency for benzo(a)anthracene (BaA), chrysene (CHR), benzo(b)fluoranthene (BbF), and BaP under the optimal conditions were 42.7 ± 1.0, 33.3 ± 1.4, 88.8 ± 0.9, and 73.8 ± 1.0%, respectively. Importantly, [Bmim][TOS] could be recycled up to five times without a significant decrease in PAHs removal. The quantum chemistry calculations and spectrum analyses were conducted to study the interactions between ILs and PAHs, using BaP as a model compound. The ability of [Bmim][TOS] to remove PAHs originate its high hydrogen bond accepting ability and the collaborative hydrogen bond interactions between the PAHs and ILs.
研究领域:
食品科学
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环境化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Zijin Liu,Xianbo Sun,Jie Fu,Wen Liu,Zhengqing Cai
Polycyclic aromatic hydrocarbons (PAHs) are frequently released in aqueous phase by oil spill or from other sources, and photochemical oxidation is one of their major weathering processes. In this study, the photochemical behavior of phenanthrene (PHE, as a representative PAH) were studied and the effects of nitrogenous compounds were evaluated. The results showed that nitrate was an effective photosensitizer for improving the photodegradation of PHE, but the promoting effect was less effective in seawater due to the presence of halogen ions; the ammonia played a negligible role on PHE degradation. The photochemical ionization was a key process for PHE degradation, it can be retarded due to the quenching of triplet excited state by dissolved oxygen, and the inhibition was most prominent in fresh water. The presence of nitrate increased the steady state concentration of •OH from 2.08 × 10 −15 M to 1.04 × 10 −14 M in fresh water, and from 1.5 × 10 −16 M to 2.08 × 10 −15 M in seawater. The secondary-order reaction rate constant between PHE and •OH ( k • OH , PHE ) was determined as 5.70 × 10 9 M −1 s −1 . Similar trend was observed for 1 O 2 . The contribution of •OH to PHE removal was more prominent in fresh water than in seawater due to the quenching effects of halogen, and the increasing of nitrate enlarged the contribution of •OH. Two possible PHE degradation pathways were proposed based on GC-MS analysis and DFT calculation. The Quantitative Structure-activity Relationship (QSAR) evaluation showed that some degradation intermediates were more toxic than PHE, but the total environmental risk was still diminished due to the low percentage of toxic intermediates. This study provided theoretical and experimental insights into the influence of nitrogenous compounds on the photodegradation of PHAs in water environment.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
Antioxidants
·
2025
·Vol. 14
·期 4
·474
·
IF 6.6
Jun Hu,Ji Feng,Yan Bai,Zhi-Sheng Yao,Xiao-Yu Wu,Xin-Yu Hong,Guo-Dong Lu,Kun Xue
Background: Sucralose and benzo(a)pyrene (B[a]P) are widespread foodborne substances known to harm human health. However, the effects of their combined exposure on kidney function remain unclear. This study aimed to investigate the mechanisms by which sucralose and B[a]P induce kidney injury through P-glycoprotein (PGP/ABCB1), a crucial protein involved in cellular detoxification. Methods: C57BL/6N mice were co-treated with sucralose and B[a]P for 90 days to evaluate their impact on kidney histopathology and function. In vitro experiments assessed cell viability, reactive oxygen species (ROS) levels, and B[a]P accumulation by flow cytometry. Molecular docking and cellular thermal shift assay (CETSA) were used to determine the binding affinity of sucralose to PGP. Furthermore, PCR, Western blotting, and immunohistochemistry were performed to analyze the expression of PGP and its upstream transcription factors. Results: Ninety days of co-exposure to sucralose and B[a]P significantly exacerbated renal dysfunction in mice, as evidenced by the elevated level of serum creatinine and urea nitrogen, which could be reverted by ROS scavenger N-acetyl cysteine (NAC). In vitro, sucralose promoted cellular accumulation of B[a]P, consequently enhancing B[a]P-induced cell growth inhibition and ROS production. Consistently, B[a]P accumulation was enhanced by PGP knockdown in both HK2 and HEK-293 cells. Mechanistically, sucralose can directly bind to PGP, competitively inhibiting its efflux capacity and increasing intracellular B[a]P retention. Prolonged co-exposure further downregulated PGP expression, possibly through the reductions of its transcriptional regulators (PXR,NRF2, andNF-κB). Conclusions: Co-exposure to sucralose and B[a]P exacerbates renal injury by impairing PGP function. Mechanistically, sucralose inhibits PGP activity, resulting in the accumulation of B[a]P within renal cells. This accumulation triggers oxidative stress and inhibits cell growth, which demonstrates that sucralose potentiates B[a]P-induced nephrotoxicity by directly inhibiting PGP-mediated detoxification pathways, thus underscoring the critical need to evaluate toxicity risks associated with combined exposure to these compounds.
研究领域:
毒理学
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分子生物学
·
医学
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PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Qing Wang,Xue Ren,Shao-Feng Tang
Background Limits on ametryn and benzo[a]pyrene in tea beverages are becoming more stringent. To enhance detection efficiency and reduce analysis costs, it is critical to develop mixed-mode extractants for these two analytes with substantial differences in properties concurrently. Biochar (BC) is increasingly being used in the preparation of mixed-mode adsorbents, but there is a challenge in balancing adsorption capacity against adsorption rate. Therefore, it is of great significance to explore mixed-mode adsorbents that can simultaneously adsorb or extract analytes with different properties, such as ametryn and benzo[a]pyrene, and achieve rapid adsorption or extraction. Results The shells of Zizyphus jujuba seeds were used to synthesize K-H-BC, a three-dimensional hierarchical porous BC with a wide range of oxygen-containing functional groups. The synthesis technique included KOH activation and modification using a 1:3 vol ratio of HNO 3 /H 2 SO 4 . K-H-BC's mixed-mode adsorption properties resulted in various interactions with ametryn and benzo[a]pyrene. It exhibited rapid adsorption rates for ametryn and benzo[a]pyrene (reaching equilibrium in 15 min and 5 min, respectively) as well as high adsorption capacities (487.64 mg g −1 and 133.16 mg g −1 , respectively). Using K-H-BC as a dispersed solid-phase extraction adsorbent, combined with high performance liquid chromatography, a method for simultaneously detecting the two analytes in tea beverages was established. Ametryn displayed a linear range of 2–500 μg L −1 with a limit of detection of 0.20 μg L −1 , while benzo[a]pyrene showed a linear range of 25–500 μg L −1 with a limit of detection of 2.12 μg L −1 . Significance and novelty It provides a solution to the problem of high hydrophobicity in KOH-activated BC by modifying it with mixed acids. K-H-BC possesses a three-dimensional hierarchical porous structure and abundant surface oxygen-containing functional groups, allowing it to retain high adsorption capacity during rapid adsorption while co-adsorbing and co-extracting analytes with significantly different properties. This research provides a reference for using BC in sample pretreatment and the comprehensive utilization of non-medicinal parts of Zizyphus jujuba .
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Long Li,Jibran Iqbal,Hui Li,Yuan Zhang,Lin Sun,Ying Zhu,Wanchao Chen,Yongqing Xi,Ting Wu,Yiping Du
A device was designed integrating solid phase extraction (SPE) and in situ optical detection techniques. A chip assembled in the device to carry out SPE was enclosed in a fully reflective aluminum box to avoid loss of radiation flux in the optical measurement. The spectrum was measured on the SPE material directly after SPE. The device offers simple analytical operation without any elution step comparing with the traditional analytical methods with complicated procedures. The device and the developed analytical technique was used for the determination of rhodamine B and benzo[ a ]pyrene with UV–visible diffuse reflectance and solid phase fluorescence spectroscopies, respectively. Under optimal conditions, standard curves of rhodamine B and benzo[ a ]pyrene showed a linear relationship in concentration ranges of 10–800 μg L -1 (R 2 = 0.99) and 0.07–3.33 μg L -1 (R 2 = 0.99), respectively. The limit of detections (LOD) were 7 μg L -1 and 0.02 μg L -1 . The proposed device was successfully employed to quantify rhodamine B and benzo[ a ]pyrene in tap water samples. The results showed that the recoveries were 90–105% and the relative standard deviations (RSDs) were 2.53–5.55%, indicating that the device and analytical method is capable of trace analytes for rapid quantitative analysis in various samples.
研究领域:
分析化学
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环境科学
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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）