AQUACULTURE
·
2024
·
IF 3.9
Juan-ying Li,Yuxiao Tong,Qi Gong,Yaxiong Tian,Yanhao Yang,Luting Wen,Hongjie Chen,Qian Wang
Eastern China is an important area for aquaculture, but the aquaculture environment, as well as the aquatic product quality, are threatened by environmental pollutants such as polycyclic aromatic hydrocarbon (PAHs) and pyrethroid pesticides (PYRs). A three-month monitoring program for PAHs and PYRs throughout the whole culture processes of the shrimp Penaeus vanmamei was carried out. Specifically, concentrations of PAHs and PYRs ranged from 339 ± 19.5–631 ± 75.6 ng·L −1 and 65.3 ± 6.74–93.5 ± 10.8 ng·L −1 in water, 183 ± 33.8–369 ± 25.1 ng·g −1 dw and 441 ± 132–521 ± 62.8 ng·g −1 dw in sediments, while 416 ± 84.3–646 ± 19.7 and 483 ± 23.3–513 ± 22.1 ng·g −1 dw in suspended solids. Mean concentrations of PAHs and PYRs in the adult shrimp were 634 ± 82.3 ng·g −1 ww and 665 ± 58.1 ng·g −1 ww, respectively. A health threat would arise if men consume more than 28.8 g and women consume more than 24.4 g each day. PAHs in the aquaculture environment were generally from the influent water and rainfall, while PYRs were mainly introduced by feed. After entering the culture environment, PAHs primarily increased the water load, leading to more significant bioaccumulation of the shrimp from the water phase (72–95 %). For PYRs, the main sources were feed (44.4 %) and influent water (20.6 %), and they were accumulated in shrimp through feed assimilation directly (15.0 %–32.0 %). Additionally, feed waste containing PYRs increased the contamination burden of sediments and suspended solids, leading to bioaccumulation through assimilation (4.00 %–15.0 %) as well. Although the contribution of influent water to PYRs in the culture environment was lower than that of feed, the contribution of aqueous exposure to the enrichment of PYRs in the shrimp was higher (53.0 %–81.0 %) than that of food (feed, sediments, and suspended solid) intake (19.0 %–47.0 %). The hydrophobicity of PYRs led to an easier bioaccumulation from freely dissolved phase to biota. Therefore, it is important to pay attention to the water quality during the whole culture period, as well as feed quality, to ultimately improve the quality of aquaculture products. In summary, different pollutants in the aquaculture environment and products were from different sources and exposure pathways. Water quality monitoring and improvement are more efficient in decreasing PAHs in the shrimp, while PYRs reduction should be assisted with feed quality control.
研究领域:
环境科学
·
水产养殖学
·
生态毒理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Dongdong Wen,Caihong Gao,Yajun Zhang,Enlu Xing,Jiabin Yao,Rongbing Fu
Herein, we proposed and demonstrated a novel approach of combining electrokinetics (EK)-assisted delivery of persulfate (PS) and ultrasound-induced thermal activation of PS and release of heavy metals, to synchronously remove organic pollutants and heavy metals from soil. Results showed that in tested soil, the mass transfer efficiency of PS induced by electromigration was approximately 3.36 times that by electroosmotic flow and 1416 times that by diffusion. Compared to the PS injection alone, EK-assisted delivery of PS significantly increased the degradation rate of phenanthrene, improving from 21.60 % to 76.23 %. Due to the applied ultrasound, the temperature of soil was observed to reach target temperatures∼50℃ for effective PS activation, and hydroxyl radicals and alkyl-like radicals were detected in the soil. Moreover, the decomposition of PS on the cathode electrode inhibited the electrolytic water reaction, avoiding the focusing effect and potential flattening. Concurrently, ultrasound thermally activated PS promoted the release of heavy metals from soil. As a result, the removal rates of Pb, Zn and Cd near the anode region increased from 0.00 %, 5.49 % and 11.72 % to 11.89 %, 82.64 % and 86.30 %, respectvcely. These results indicated the novel approach holds the potential for simultaneous removal of organic pollutants and heavy metals.
研究领域:
环境科学
·
土壤修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Xiaolong Yao,Ke Wang,Wan Wang,Tingting Zhang,Wei Wang,Xiaoyang Yang,Feng Qian,Hailong Li
Household coal combustion is identified to be the second largest emission source of polycyclic aromatic hydrocarbons (PAHs) in China. In this study, ferroferric oxide (Fe 3 O 4 ) was used as a coal burning additive to reduce PAHs emission from coal combustion in a household coal stove. The results showed that Fe 3 O 4 participated in the coal combustion process. The addition of Fe 3 O 4 reduced the release of PAHs during the coal combustion process, and could improve the residence capacity of ash residue to these PAHs. Toxic equivalent quantity (TEQ) of PAHs in flue gas from combustion of coal mixed with Fe 3 O 4 was less than that from the raw coal combustion. For a typical combustion temperature of 850 °C, the TEQ of PAHs for the mixture of coal and 2.0 wt % Fe 3 O 4 decreased 21.98% compared to that for the raw coal. The abundant active surface oxygen species originated from the phase transformation of iron oxides probably accelerated the cracking of PAHs, and hence led to the reduction of PAH emissions and their TEQ. The study could help to develop new technology for reduction of PAHs emission from household coal combustion.
研究领域:
环境科学
·
能源与燃料
·
化学工程
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Zhuan Fu,Sijie Zhou,Liangjun Xia,Yunshan Mao,Liyun Zhu,Yunqi Cheng,Aming Wang,Chunhua Zhang,Weilin Xu
Polycyclic aromatic hydrocarbons (PAHs) from cigarettes are one of the main pollutants affecting public health. Herein, a cellulose cigarette filter with three-dimensional (3D) hierarchically porous structure was fabricated using a natural cellulose Juncus effusus (JE) fiber, whose pore size was well controlled by biocompatible polyvinylpyrrolidone (PVP) using a simple dip-dry method. The adsorption capacity and mechanism of the PVP–JE filter tips (PJF) against PAHs were investigated in detail. Compared with conventional cellulose acetate filter tips (CAF), the cellulose PJF were superior at filtering and adsorbing of PAHs from mainstream smoke with the removal efficiency of 61.79 %, which was 22.57 % higher than that of CAF (39.22 %). The ternary structures including polymer filter membrane, 3D network, and interconnected channels were demonstrated as the main roles for highly effective removal of PAHs. The JE-based cellulose cigarette filter can be a promising candidature to broaden the application range of polysaccharide in pollutant elimination.
研究领域:
环境科学
·
公共卫生
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yaling Wang,Maolin Wang,Qing Xie,Xiyun Cai
We report new activated persulfate systems with cyclodextrin (CD)-coated Fe 3 O 4 @Fe 0 nanoparticles (Fe 3 O 4 @Fe 0 -CD) that are characterized by both highly activating persulfates and rapidly accessing hydrophobic PAHs. Fe 3 O 4 @Fe 0 -β-CD displays chain-like structure of core–shell Fe 3 O 4 @Fe 0 nanoparticles coated with a CD layer (about 5.9 nm). CD coating stabilizes the polycrystalline structure of Fe 3 O 4 @Fe 0 nanoparticles and accelerates mass transfer of PAHs in water, thereby making Fe 3 O 4 @Fe 0 -β-CD intrinsically stable and reactive. Fe 3 O 4 @Fe 0 -β-CD/PS, featured by high yields of highly reactive Fe(IV), had about 30-fold rate constants of naphthalene (Nap) in water as much as Fe 3 O 4 @Fe 0 /PS. Fe 3 O 4 @Fe 0 -β-CD/PS completely removed Nap in water during 13 of total 18 supplementations of Nap and/or PS, whereas Fe 3 O 4 @Fe 0 /PS completely removed Nap only at the first supplementation of Nap. Likewise, Fe 3 O 4 @Fe 0 -β-CD/PS completely removed Nap in simulated groundwater, and degraded four PAHs in soils by >63%. This study may provide a technical basis for the developments of new PS activators to remove recalcitrant hydrophobic contaminants in water and soils.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED TOXICOLOGY
·
2023
·
IF 3.3
Miao Yang,Kanmin Mao,Xin Cao,Hongjuan Liu,Xinzheng Wang,Weifeng Mao,Liping Hao
The metabolism of polycyclic aromatic hydrocarbons (PAHs) and the elimination kinetics of their mono-hydroxylated metabolites (OH-PAHs) following single exposure to different combinations of four PAHs (PAH4) were studied. Male Sprague–Dawley rats were orally exposed to a single dose of benzo[a]pyrene (B[a]P) or PAH2 (B[a]P + chrysene), PAH3 (B[a]P + chrysene + benz[a]anthracene), and PAH4 (B[a]P + chrysene + B[a]A + benzo[b]fluoranthene) with each combination adjusted to the same dose of individual compound. OH-PAHs including 3-hydroxybenzo[a]pyrene, 3-hydroxychrysene, 3-hydroxybenz[a]anthracene, and 1-hydroxypyrene (1-OHP) were detected in serum and urine samples collected at six intervals over a 72-h period post-dosing. The hepatic mRNA levels of cytochrome P450 (CYPs) were determined to ascertain the expression induction of PAHs metabolic enzymes. Results showed OH-PAHs (except 1-OHP) peaked within 8 h in serum and were excreted from urine within 24–48 h. The serum and urinary concentration of 3-hydroxybenzo[a]pyrene was significantly increased after PAH4 exposure compared with other PAHs combinations. Inversely, urinary concentration of 3-hydroxychrysene was decreased after PAH4 exposure, and the kinetics of 3-hydroxybenz[a]anthracene or 1-OHP were not different depending on the PAHs combinations. Also, CYPs were markedly induced by PAHs. Notably, the induction levels of CYP1A1 and CYP1B1 were significantly higher after PAH4 exposure compared with B[a]P exposure. The results indicated the metabolism of B[a]P was accelerated after PAH4 exposure which might be partly due to the induction of CYPs. These results confirmed PAHs are rapidly metabolized and suggested potential interactions of PAHs may happen among PAH4 mixture.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GENE
·
2023
·
IF 3.5
Shaolin Xie,Yongyong Feng,Aiguo Zhou,Zhiyuan Lu,JixingZou
Cytochrome P450 1 (CYP1) is an important enzyme family involved in the metabolism of pollutants, and used as a biomarker to monitor environmental pollution. In this study, a fluorescence-labeled cyp1a zebrafish line, named as KI ( cyp1a +/+ -T2A-mCherry) (KICM), was originally constructed to monitor dioxin-like compounds in the environment. However, the cyp1a gene expression in the KICM line was inhibited by the fluorescence labeling, thus leading to a significantly increased sensitivity of KICM zebrafish line to PAHs. Then, a cyp1a knockout zebrafish line, named KOC, were constructed for comparative analysis with the cyp1a low-expression line. Interestingly, knockout of the cyp1a gene did not increase the sensitivity of zebrafish to PAHs as significantly as the cyp1a low-expression line. So, the expression levels of related genes in the aryl hydrocarbon receptor pathway were analyzed and the results showed that the expression level of cyp1b in KOC group was significantly higher than that of wild type and KICM under the same PAH exposure. This indicated that the effect of losing cyp1a was compensated by inducing expression of cyp1b . In conclusion, two new zebrafish models including cyp1a low-expression line and cyp1a knockout line were constructed in this study, which may provide a convenient model for subsequent studies on the toxicity mechanism of PAHs and the role of cyp1a in detoxification.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Yue Gao,Yanan Xue,Jing Ji,Kai Zhen,Xuejiao Tang,Peng Zhang,Cuiping Wang,Hongwen Sun
The remediation for industrial site soil has attracted public concerns because of the hazardous and hydrophobic properties of organic pollutants existed in the soil. The persulfate oxidation activated by Fe 2+ chelated with sodium citrate (PS/Fe 2+ /SC) was used to remediate different types of industrial site soils in the present study. The maximum removal rates of Σ16 PAHs in the Nanjing site soil (NJS) and Hefei site soil (HFS) were 73.6% and 85.8% after the second-stage oxidation, respectively. The late oxidation stages couldn't enhance the degradation efficiency of PAHs due to the increase of high crystalline Fe mineral phases both in the NJS and HFS, which significantly decreased the Fe 2+ /Fe 3+ recycle and further inhibited the reactive oxygen species production during the remediation. The remediation using PS/Fe 2+ /SC could change the soil physicochemical properties , such as the functional groups, specific surface area (SSA), total pore volume (TPV) and some UV spectral parameters of soil particles. Additionally, the oxidation of PS/Fe 2+ /SC also altered the composition of soil dissolve organic matters, especially the fulvic acid , which further affected the Fe 2+ oxidation. The study mainly discloses the mechanism of limitation using persulfate oxidation activated by Fe materials at late oxidation stage.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Xiang-Dong Qing,Huai-Bo Zhou,Xiao-Hua Zhang,Hai-Long Wu,Chang-Ya Chen,Su-Wen Xu,Shuang-Shuang Li
Polycyclic aromatic hydrocarbons (PAHs) are of worldwide environmental concern because of their properties of carcinogenicity, mutagenicity and teratogenicity. In the work, a smart combination of gel permeation chromatography-diode array detector and second-order calibration based on alternating trilinear decomposition (ATLD-GPC-DAD) is proposed for simultaneous targeted identification and quantification of 15 PAHs in atmospheric pollution sources such as flue-dust and greasy-dirt samples. No need of tedious sample pretreatment and specific PAHs separation column, severely overlapped chromatograph peaks are successfully resolved by the ATLD-GPC-DAD method even with only 3 s of difference in retention times. Accurate quantitative results of 15 PAHs are achieved by using the developed method even in the presence of unexpected interferents. The limits of detection range from 0.94 ng mL −1 to 48.86 ng mL −1 , and the average recoveries are in the range of (81.2 ± 1.0)% to (108.9 ± 11.6)% for flue-dust samples and (89.7 ± 3.4)% to (107.5 ± 8.0)% for greasy-dirt samples. The sensitivity and selectivity of analytes is significantly improved with the aid of “mathematical separation” of the method. These results indicate that it opens a promising analytical strategy for control of PAHs emissions and management of urban air quality.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Tangqiang Sun,Di Wang,Yan Tang,Xuebin Xing,Jingcong Zhuang,Jiaxing Cheng,Zhenxia Du
The contamination of water is a high risk to human health, so there is an urgent need to rapidly detect water pollution in the field. Ion mobility spectrometry (IMS) is suitable for on-site analysis with the merit of rapid analysis and compact size. In this study, we developed a new method which coupled fabric phase sorptive extraction (FPSE) with IMS for rapid detection of polycyclic aromatic hydrocarbons (PAHs) in water present in the field. Polydimethylsiloxane (PDMS) was coated on the glass fiber cloth through a sol-gel reaction. After extracting the PAHs in water, the fabric coated PDMS could be directly put into the inlet of IMS instrument for thermal desorption. The PAHs were analyzed by the IMS instrument operated in the positive ion mode with a corona discharge (CD) ionization source. The primary parameters affecting extraction efficiency such as extraction time, extraction temperature, and ionic strength were investigated and optimized by using phenanthrene (Phe), benzo[ a ]anthracene (BaA) and benzo[ a ]pyrene (BaP) as model compounds. Under the optimal conditions, the FPSE-IMS detection limits were 5 ng ml −1 ,8 ng ml −1 and 10 ng ml −1 respectively. Satisfactory recoveries were obtained in the range from 80.5% to 100.5% by testing the spiked real water samples and validated by the standard method（HJ487-2009）. Based on the results, the method of FPSE-IMS could be feasibly applied for monitoring the water quality on-site and providing early warning in the field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Xiaoyuan Man,Xun-an Ning,Haiyuan Zou,Jieying Liang,Jian Sun,Xingwen Lu,Jiekui Sun
This paper proposes a combined ultrasound (US) and zero-valent iron/EDTA/Air (ZEA) system to remove polycyclic aromatic hydrocarbons (PAHs) from textile dyeing sludge . The removal efficiencies of 16 PAHs using ZEA, US/Air (air injected into the US process), and US/ZEA treatments were investigated, together with the effects of various operating parameters. The enhanced mechanisms of US and the role of reactive oxygen species (ROS) in removing PAHs in the US/ZEA system were explored. Results showed that only 42.5% and 32.9% of ∑16 PAHs were removed by ZEA and US/Air treatments respectively, whereas 70.1% were removed by US/ZEA treatment, (with favorable operating conditions of 2.0 mM EDTA, 15 g/L ZVI, and 1.08 w/cm 3 ultrasonic density). The US/ZEA system could be used with a wide pH range. US led to synergistic improvement of PAHs removal in the ZEA system by enhancing sludge disintegration to release PAHs and promoting ZVI corrosion and oxygen activation. In the US/ZEA system, PAHs could be degraded by ROS (namely OH, O 2 − /HO 2 , and Fe(IV)) and adsorbed by ZVI, during which the ROS made the predominant contribution. This study provides important insights into the application of a US/ZEA system to remove PAHs from sludge.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Qiuyi Lin,Haolin Zhang,Xiaomei Lv,Ruiwei Xie,Bing-Huei Chen,Yu-Wen Lai,Lei Chen,Hui Teng,Hui Cao
Polycyclic aromatic hydrocarbons (PAHs), prominent carcinogens formed during food processing, pose health risks through long-term consumption. This study focuses on 16 priority PAHs in the European Union, investigating their formation during pyrolysis. Glucose, amino acids and fatty acids are important food nutrients. To further explore whether these nutrients in food form PAHs during heating, a single chemical model method was used to heat these nutrients respectively, and GC–MS/MS was used to identify and quantify the obtained components. Glucose is the most basic nutrient in food, so the influence of water, pH, temperature and other factors on the formation of PAHs was studied in the glucose model. At the same time, the models of amino acids and fatty acids were used to assist in improving the entire nutrient research system. According to our results, some previously reported mechanisms of PAHs formation by fatty acids heating were confirmed. In addition, glucose and amino acids could also produce many PAHs after heating, and some conclusions were improved by comparing the intermediates of PAHs from three types of nutrients.
研究领域:
食品科学
·
化学
·
毒理学
✓ 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）