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Glycine-β-cyclodextrin-assisted cometabolism of phenanthrene and pyrene by Pseudomonas stutzeri DJP 1 from marine sediment
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作者 Junfeng JIANG Weijun TIAN +3 位作者 Zhiyang LU Meile CHU Huimin CAO Dantong ZHANG 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2024年第2期560-569,共10页
Cometabolic degradation is currently an effective and extensively way to remove high molecular weight polycyclic aromatic hydrocarbons(HMW-PAHs).Unfortunately,due to low bio-accessibility and high biotoxicity,the come... Cometabolic degradation is currently an effective and extensively way to remove high molecular weight polycyclic aromatic hydrocarbons(HMW-PAHs).Unfortunately,due to low bio-accessibility and high biotoxicity,the cometabolic degradation rate of HMW-PAHs is limited.Glycine-β-cyclodextrin(GCD)was obtained through amino modification ofβ-cyclodextrin(BCD)and added to cometabolic system of phenanthrene(PHE)and pyrene(PYR)to assist PYR biodegradation.Results show that the addition of GCD(100 mg/L)effectively improved the removal rate of PYR(20 mg/L)by 42.3%.GCD appeared to increase the bio-accessibility and reduce the biotoxicity of PHE and PYR,and then promoted the growth of Pseudomonas stutzeri DJP1 and stimulated the elevation of dehydrogenase(DHA)and catechol 12 dioxygenase(C12O)activities.The phthalate metabolic pathway was accelerated,which improved the cometabolic degradation.This study provided a new reference for the cometabolic degradation of HMW-PAHs. 展开更多
关键词 COMETABOLISM PHENANTHRENE pyrene glycine-β-cyclodextrin biological accessibility biotoxicity
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Determination of Benzo[a]pyrene in Edible Oil by High Performance Liquid Chromatography-Fluorescence Detector (HPLC-FL)
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作者 Guixia YANG Jie LIU +3 位作者 Xiujuan WANG Fenglan ZHANG Kun XIN Chunli KONG 《Agricultural Biotechnology》 2024年第2期8-9,19,共3页
In this study, an optimized high performance liquid chromatography-fluorescence detector (HPLC-FL) method for the determination of benzo[a]pyrene in edible oil was established. HPLC was performed with Thermo Fisher Sc... In this study, an optimized high performance liquid chromatography-fluorescence detector (HPLC-FL) method for the determination of benzo[a]pyrene in edible oil was established. HPLC was performed with Thermo Fisher Scientific C18 column (250 mm×4.6 mm, 5 μm) as the chromatographic column and acetonitrile and water as the mobile phase, and the excitation wavelength and emission wavelength of fluorescence detector were 286 and 430 nm, respectively. The response was high, and the linear range was 0.5-10.0 ng/ml. The lowest limit of detection was 0.11 ng/ml, and the average recovery was 92.5%. This method is suitable for quantitative analysis of benzo[a]pyrene content in edible oil. 展开更多
关键词 BENZO[A]pyrene High performance liquid chromatography Fluorescence detector
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Significant Positive Correlation of Plasma BPDE-Albumin Adducts to Urinary 1-Hydroxypyrene in Coke Oven Workers 被引量:3
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作者 HONG WANG XIAO-BO YANG +7 位作者 AI-LIN LIU HONG-YAN ZHEN LIANG GUO HUA-SHAN LIANG YONG-YI YUN BAI YONG-WEN CHEN TANG-CHUN WU 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2007年第3期179-183,共5页
Objective To investigate the application of BPDE-albumin adducts as monitoring biomarkers for coke oven workers exposed to polycyclic aromatic hydrocarbons (PAHs) and to explore possible relationship between BPDE-al... Objective To investigate the application of BPDE-albumin adducts as monitoring biomarkers for coke oven workers exposed to polycyclic aromatic hydrocarbons (PAHs) and to explore possible relationship between BPDE-albumin adducts and urinary 1-hydroxypyrene (1-OHP) levels in them. Methods Thirty-seven coke oven workers from a coke plant and 47 controls without the occupational exposure to PAHs were recruited in this study. The levels of plasma BPDE-albumin adducts and urinary 1-OHP were analyzed using high performance liquid chromatography. Results The median levels of BPDE-albumin adducts (42.10 fmol/mg albumin) and urinary 1-OHP (5.46 μmol/mol creatinine) were significantly higher in coke oven workers than in controls (14.16 fmol/mg albumin, 2.96μmol/mol creatinine, respectively; P〈0.01). Multiple logistic regression analysis showed that coke oven workers were at higher risk of having BPDE-albumin adduct levels above 25.30 μmol/mg albumin (OR=1.79, P〈0.01) and urinary 1-OHP levels above 4.13 μmol/mol creatinine (OR=2.45, P〈0.05). There was a positive correlation between the levels of BPDE-albumin adducts and urinary 1-OHP in all subjects (rs=0.349, P〈0.01). Conclusion BPDE-albumin adduct is a useful biomarker for monitoring long-term exposure to PAHs, and plasma BPDE-albumin adducts level is significantly correlated to urinary 1-OHP levels in coke oven workers. 展开更多
关键词 Polycyclic aromatic hydrocarbons BENZO[A]pyrene Albumin adduct 1-Hydroxypyrene Polycyclic aromatic hydrocarbons Benzo[α]pyrene Albumin adduct 1-HYDROXYpyrene
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Switch of phosphorylation to O-GlcNAcylation of AhR contributes to vascular oxidative stress induced by benzo[a]pyrene
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作者 Rong Wang Yun Huang +9 位作者 Xiaoruo Gan Chenghao Fu Yuemin Li Ning Chen Hao Xi Huishan Guo Wei Zhang Yuhong Lü Yan Zhang Pin Lü 《Food Science and Human Wellness》 SCIE CSCD 2023年第6期2263-2275,共13页
Benzo[a]pyrene(B[a]P)is a food contaminant toxic for cardiovascular diseases.The nuclear translocation of Arylhydrocarbon receptor(AhR)plays an important role in B[a]P-induced oxidative stress and vascular diseases.We... Benzo[a]pyrene(B[a]P)is a food contaminant toxic for cardiovascular diseases.The nuclear translocation of Arylhydrocarbon receptor(AhR)plays an important role in B[a]P-induced oxidative stress and vascular diseases.We confi rmed that B[a]P promoted ROS production in vascular smooth muscle cells(VSMCs)in vitro and in vivo,associated with the nuclear translocation of AhR.It is known that phosphorylation inhibits while dephosphorylation of AhR promotes nuclear translocation of AhR.However,from the posttranslational modifi cation level,the mechanism by which B[a]P activates and regulates the nuclear translocation of AhR is unclear.Co-immunoprecipitation results showed that cytoplasmic AhR was phosphorylated before B[a]P stimulation,and switched to O-GlcNAcylation upon B[a]P 1-h stimulation in VSMCs,suggesting there may be a competitively inhibitory relationship between O-GlcNAcylation and phosphorylation of AhR.Next,siRNAs of O-linked N-acetylglucosamine transferase(OGT),O-GlcNAcase(OGA)and OGA inhibitor PUGNAc were used.SiOGT blocks but siOGA and PUGNAc promote B[a]P-dependent AhR nuclear translocation and oxidative stress.Ser11 may be the competitive binding site for phosphorylation and O-GlcNAcylation of AhR.Phosphorylation-mimic variant inhibits but O-GlcNAcylation of AhR promotes AhR nuclear translocation and oxidative stress.Our fi ndings highlight a new perspective for AhR nuclear translocation regulated by the competitive modifi cation between phosphorylation and O-GlcNAcylation. 展开更多
关键词 BENZO[A]pyrene Vascular smooth muscle cells Aryl hydrocarbon receptor Phosphorylation modification O-GlcNAcylation modification
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Pyrene分子(小片石墨晶体)的电子传导特性(英文)
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作者 王利光 张鸿宇 +4 位作者 陈蕾 李勇 郁鼎文 田上胜规 塚田捷 《人工晶体学报》 EI CAS CSCD 北大核心 2007年第5期1026-1030,1021,共6页
利用量子理论中基于Green函数的tight-binding方法,对pyrene分子的电子传导和电子流分布进行了理论研究。在考虑到界面耦合和Hopping积分的情况下,得出了电子透射谱和流分布的模拟结果。结果显示透射与电子的能量紧密相关;谱的振荡特征... 利用量子理论中基于Green函数的tight-binding方法,对pyrene分子的电子传导和电子流分布进行了理论研究。在考虑到界面耦合和Hopping积分的情况下,得出了电子透射谱和流分布的模拟结果。结果显示透射与电子的能量紧密相关;谱的振荡特征是能级量子化的结果;流分布有着特定的方向,并且在每一个原子点上符合Kirchhoff量子流守恒定律。另外还发现了桥接pyrene分子的正负能开关特性。 展开更多
关键词 石墨晶片 pyrene分子 电导 电流分布
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Effects of Pyrene Stress on Growth and Physiological Indexes of Maize(Zea mays L.) Seedling
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作者 陈倩婷 许超 +2 位作者 陈旭磊 林世奇 吴启堂 《Agricultural Science & Technology》 CAS 2011年第1期37-40,57,共5页
[Objective]The paper was to explore the effects of pyrene stress on growth and physiological indexes of maize seedling.[Method] The effects of different concentrations of pyrene(0,0.5,1.0,and 2.0 mg/L) on growth and... [Objective]The paper was to explore the effects of pyrene stress on growth and physiological indexes of maize seedling.[Method] The effects of different concentrations of pyrene(0,0.5,1.0,and 2.0 mg/L) on growth and several physiological indexes,such as chlorophyll content,malnodiadehyde(MDA) content of both leaves and roots of maize(Zea Mays L.) seedlings of Shixiang 1(sensitive variety) and Guangtian 3(tolerant variety) were studied by a hydroponic experiment.[Result]As the concentration of prene increasing within the test concentration range,the contents of chlorophyll a and chlorophyll b in Shixiang 1 first increased and then decreased;relative growth yield and absolute growth rate showed the decreasing trend;MDA contents in roots and leaves showed the increasing trend.Relative growth yield,absolute growth rate and chlorophyll a content in Guangtian 3 first increased and then decreased;chlorophyll b and MDA contents in roots showed the increasing trend;MDA contents in leaves showed the decreasing trend.Compared with control,chlorophyll a and chlorophyll b contents of Shixiang 1 significantly increased under pyrene concentration of 0.5-1.0 mg/L,which significantly decreased as the concentration of pyrene ≥2.0 mg/L;MDA contents in roots and leaves significantly increased as the concentration of pyrene ≥1.0 mg/L,while relative growth yield and absolute growth rate significantly decreased.Chlorophyll a and chlorophyll b contents in Guangtian 3 significantly increased as the concentration of pyrene ≥1.0 mg/L.Pyrene concentration had significantly negative correlation with relative growth yield and absolute growth rate of Shixiang 1,while it had significant positive correlation with MDA contents in roots.Pyrene concentration had significant positive correlation with chlorophyll b and MDA contents in roots of tolerant variety Guangtian 3.[Conclusion]The study provided basis for the management measures of maize during its seedling stage. 展开更多
关键词 MAIZE pyrene stress GROWTH Physiological indexes
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FLUOROMETRIC METHOD FOR RAPID DETECTION OF DNA DAMAGE IN HUMAN PERIPHERAL LEUKOCYTES INDUCED BY BENZO(A)PYRENE
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《癌变.畸变.突变》 CAS CSCD 1991年第S1期255-255,共1页
A preliminary study on application of Pluorometric Analysis ofDNA Unwinding(FADU)to the detection of DNA strand breaksinduced by indirect environmental mutagen benzo(a)pyrene(BaP)was conducted.The results showed... A preliminary study on application of Pluorometric Analysis ofDNA Unwinding(FADU)to the detection of DNA strand breaksinduced by indirect environmental mutagen benzo(a)pyrene(BaP)was conducted.The results showed that BaP,activated by PCB-in-duced rat liver S<sub>9</sub>mixture,could result in obvious increase of DNAstrand breaks in human peripheral leukocytes incubated with 展开更多
关键词 DNA RAPID A)pyrene BREAKS STRAND preliminary pyrene benzo INCUBATED minutes
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Metabolism of benzo[a]pyrene in peroxynitrite/Fe(III) porphyrin system
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作者 LUO Yun-jing LIN Tai-feng ZHANG Shu-fen LIU Rui ZHONG Ru-gang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2007年第4期385-386,共2页
The peroxynitrite/porphyrin biomimetic system was established to investigate the effects of peroxynitrite on benzo[a]pyrene (B[a]P) metabolism. Three model systems consisting of different iron porphyrins were compar... The peroxynitrite/porphyrin biomimetic system was established to investigate the effects of peroxynitrite on benzo[a]pyrene (B[a]P) metabolism. Three model systems consisting of different iron porphyrins were compared, and the results showed that the peroxynitdte/T(p-Cl)PPFeCl system was the highest catalytic efficiency in the metabolism of B [a]P. We analyzed the B [a]P metabolites produced from this system by RP-HPLC method and firstly identified the formation of nitrobenzo[a]pyrenes which are the special metabolites of B [a]P induced by peroxynitrite. 展开更多
关键词 PEROXYNITRITE benzo[a]pyrene metabolism nitrobenzo[a]pyrenes
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Identification of 1-hydroxypyrene in urine of dogs after pyrene injection and its excretion
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作者 Zhao Zhenhua and Quan WenyiBeijing Municipal Research Institute of Environmental Protetion,Beijing 100037,China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1991年第2期127-132,共6页
With high performance liquid chromatograph and fluorospectrometry, 1-hydroxypyrene is identified as a metabolite of pyrene in the urine of dogs after intramuscular injection of pyrene. When three successive doses of 1... With high performance liquid chromatograph and fluorospectrometry, 1-hydroxypyrene is identified as a metabolite of pyrene in the urine of dogs after intramuscular injection of pyrene. When three successive doses of 1,2 and 5 μmol/kg wt. pyrene administered, urinary excretion of 1-hydroxypyrene reaches the peak level between 24th and 48th hours. Excreted 1-hydroxypyrene consists of only about 0.05% of injected pyrene. 展开更多
关键词 1-HYDROXYpyrene pyrene polynuclear aromatic hydrocarbons.
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DFT Study of Monochlorinated Pyrene Compounds
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作者 Ehab AlShamaileh 《Computational Chemistry》 2014年第3期43-49,共7页
The structure, electronic properties, and chemical reactivity of pyrene and its three monochlorinated derivatives have been theoretically studied by using density functional theory (DFT). Several methods and basis set... The structure, electronic properties, and chemical reactivity of pyrene and its three monochlorinated derivatives have been theoretically studied by using density functional theory (DFT). Several methods and basis sets are tested for the optimization of the geometrical structure and the B3LYP/6-311G** method/basis set is found to be the most suitable in predicting the heat of formation of pyrene and the minimum energy optimized structure of pyrene and its monochlorinated derivatives. The geometrical parameters and the heat of formation of pyrene are in good agreement with available experimental data. The chemical reactivity and stability of the four compounds are investigated. The computed results agree well with experimental results of monochlorination of the pyrene molecule. The relative stability of the monochlorinated pyrene compounds is in the order: 1-chloropyrene > 4-chloropyrene > 2-chloropyrene. 展开更多
关键词 DFT pyrene Chloropyrene HEAT of Formation CHEMICAL REACTIVITY
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Inhibitory effects of RRR-α-tocopheryl succinate on benzo (a) pyrene (B (a) P)-induced forestomach carcinogenesis in female mice 被引量:24
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作者 Kun Wu1 Yu Juan Shan1 +2 位作者 Yan Zhao1 Jian Wu Yu2 Bai He Liu1 1Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin 150001, Heilongjiang Province, China2The Second Affiliated Hospital, Harbin Medical University, Harbin 150001, Heilongjiang Province, China 《World Journal of Gastroenterology》 SCIE CAS CSCD 2001年第1期60-65,共6页
AIM To study the inhibitory effects of VES( RRR-α-tocopheryl Succinate, VES ), aderivative of natural Vitamin E, on benzo (a)pyrene (B (a) P)-induced forestomach tumor infemale mice.METHODS The model of B (a)P-induce... AIM To study the inhibitory effects of VES( RRR-α-tocopheryl Succinate, VES ), aderivative of natural Vitamin E, on benzo (a)pyrene (B (a) P)-induced forestomach tumor infemale mice.METHODS The model of B (a)P-inducedforestomach tumor was established according tothe methods of Wattenberg with slightmodifications. One hundred and eighty femalemice (6 weeks old) were divided into six groupsequally; negative control (Succinic acid),vehicle control ( Succinate + B (a) P), positivecontrol(B(a) P), high VES(2.5g/kg. b. w + B(a)P), Iow VES(1 .25 g/kg. b. w + B(a) P) ig as wellas VES by ip (20 mg/kg, b. w + B(a) P). Exceptthe negative control group, the mice wereadministrated with B(a)P ig. and correspondingtreatments for 4 weeks to study the anti-carcinogenetic effect of VES during the initiationperiod. The experiment lasted 29 weeks, inwhich the inhibitory effects of VES both ontumor incidence and tumor size were tested.RESULTS The models of B (a)P-inducedforestomach tumor in female mice wereestablished successfully. Some werecauliflower-like, others looked like papilla, evena few were formed into the ulcer cavities. VES at1.25 g/kg. b. w, 2.5 g/kg. b.w. by ig and 20 mg/kg. b. w. via ip could decrease the number oftumors per mouse (1.7 ± 0. 41, 1.6 ± 0.34 and 1.1±0.43), being lower than that of B(a)P group(5.4 ± 0.32, P<0.05). The tumor incidence wasinhibited by 18.2%, 23.1% and 50.0%. VES at1.25g/kg.b.w., 2.5 g/ kg.b.w. by ig and20 mg/kg. b.w. via ip reduced the total volumeof tumors per mouse (54.8 ± 8.84, 28.4 ± 8.32and 23.9± 16.05), being significantly lower thanthat of B(a)P group (150.2±20.93, P<0.01).The inhibitory rates were 63.5%, 81.1% and84.1%, respectively.CONCLUSION VES has inhibitory effects on B(a) P-induced forestomach carcinogenesis infemale mice, especially by ip and it may be apotential anti-cancer agent in vivo. 展开更多
关键词 stomach neoplasms ANTINEOPLASTIC agents vitamin E transforming growth factors apoptosis benzo(a) pyrene
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Biodegradation of benzo[a]pyrene in soil by Mucor sp.SF06 and Bacillus sp.SB02 co-immobilized on vermiculite 被引量:30
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作者 SU Dan LI Pei-jun +1 位作者 FRANK Stagnitti XIONG Xian-zhe 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第6期1204-1209,共6页
Two indigenous microorganisms, Bacillus sp. SB02 and Mucor sp. SF06, capable of degrading polycyclic aromatic hydrocarbons (PAHs) were co-immobilized on vermiculite by physical adsorption and used to degrade benzo[a... Two indigenous microorganisms, Bacillus sp. SB02 and Mucor sp. SF06, capable of degrading polycyclic aromatic hydrocarbons (PAHs) were co-immobilized on vermiculite by physical adsorption and used to degrade benzo[a] pyrene (BaP). The characteristics of BaP degradation by both free and co-immobilized microorganism were then investigated and compared. The removal rate using the immobilized bacterial-fungal mixed consortium was higher than that of the freely mobile mixed consortium. 95.3% of BaP was degraded using the co-immobilized system within 42 d, which was remarkably higher than the removal rate of that by the free strains. The optimal amount of inoculated co-immobilized system for BaP degradation was 2%. The immobilized bacterial-fungal mixed consortium also showed better water stability than the free strains. Kinetics of BaP biodegradation by co-immobilized SF06 and SB02 were also studied. The results demonstrated that BaP degradation could be well described by a zero-order reaction rate equation when the initial BaP concentration was in the range of 10--200 mg/kg. The scanning electronic microscope (SEM) analysis showed that the co-immobilized microstructure was suitable for the growth of SF06 and SB02. The mass transmission process of co-immobilized system in soil is discussed. The results demonstrate the potential for employing the bacterial-fungal mixed consortium, co-immobilized on vermiculite, for in situ bioremediation of BaP. 展开更多
关键词 BIODEGRADATION Bacillus sp. SB02 Mucor sp. SF06 BENZO[A]pyrene immobilization soil pollution
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Phytoremediation for phenanthrene and pyrene contaminated soils 被引量:12
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作者 GAOYan-zheng ZHULi-zhong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第1期14-18,共5页
Phytoremediation of soil contaminated with phenanthrene and pyrene was investigated using twelve plant species. Plant uptake and accumulation of these chemicals were evaluated. At the end of the experiment(45 d), the ... Phytoremediation of soil contaminated with phenanthrene and pyrene was investigated using twelve plant species. Plant uptake and accumulation of these chemicals were evaluated. At the end of the experiment(45 d), the remaining respective concentrations of soil phenanthrene and pyrene in spiked vegetated soils, with initial phenanthrene of 133 3 mg/kg and pyrene of 171 5 mg/kg, were 8 71—16 4 and 44 9—65 0 mg/kg, generally 4 7%—49 4% and 7 1%—35 9% lower than their concentrations in the non vegetated soils. The loss of phenanthrene and pyrene in vegetated spiked soils were 88 2%—93 0% and 62 3%—73 8% of the added amounts of these contaminants, respectively. Although plant uptake and accumulation of these compounds were evident, and root concentrations and RCFs(root concentration factors; defined as the ratio of PAH concentrations in roots and in the soils on a dry weight basis) of these compounds significantly positively correlated to root lipid contents, plant uptake and accumulation only accounted for less than 0 01% and 0 23% of the enhanced loss of these chemicals in vegetated versus non vegetated soils. In contrast, plant promoted microbial biodegradation was the dominant mechanism of the phytoremediation for soil phenanthrene and pyrene contamination. Results from this study suggested a feasibility of the establishment of phytoremediation for soil PAH contamination. 展开更多
关键词 PHYTOREMEDIATION PHENANTHRENE pyrene polycyclic aromatic hydrocarbons(PAHs) soil
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Antioxidant responses to benzo[a]pyrene,tributyltin and their mixture in the spleen of Sebasticus marmoratus 被引量:12
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作者 WU Yu-qiong WANG Chong-gang +3 位作者 WANG Yun ZHAO Yang CHEN Yi-xin ZUO Zheng-hong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2007年第9期1129-1135,共7页
It has been reported that there is an interaction between Benzo[a]pyrene (BaP), a widespread carcinogenic polycyclic aromatic hydrocarbon, and tributyltin (TBT), an organometal used as an antifouling biocide. This... It has been reported that there is an interaction between Benzo[a]pyrene (BaP), a widespread carcinogenic polycyclic aromatic hydrocarbon, and tributyltin (TBT), an organometal used as an antifouling biocide. This study was therefore designed to examine the potential in vivo influence of BaP, TBT and their mixture on splenic antioxidant defense systems of Sebastiscus marmoratus. The fish were exposed to water containing environmentally relevant concentrations of BaP, TBT and their mixture. Spleens were collected for biochemical analysis after exposure for 7, 25, 50 d and after recovery for 7, 20 d. Cotreatment with BaP and TBT for 7 d potentiated the induction of glutathione peroxidase (GPx) activity by BaP or TBT alone. The cotreatment for 25 and 50 d resulted in inhibition of GPx activity, which was similar to the effect of TBT. Splenic glutathione S-transferase (GST) activities were significantly elevated in S. marmoratus exposed to BaP starting from 7 d and remained high up to 25 d. However, no further activity change was found with prolonged exposure. Cotreatment of BaP and TBT primarily inhibited the GST activity, which was similar to the effect of TBT. Cotreatment with BaP and TBT for 25 or 50 d potentiated the depletion of GSH (glutathione) by BaP or TBT alone. MDA (malondialdehyde) contents in spleen of S. marmoratus were not significantly altered compared with the control during the test period. Spleen, as an immune organ, is sensitive to exposure of BaP or TBT. It should have an effective mechanism to counteract oxidative damage. Antioxidative defense systems in spleen of S. marmoratus should be considered as potential biomarkers. Short-term exposure of BaP or TBT could result in induction of antioxidant defense system. A significant decrease of these indices, such as GSH, GST, GPx might indicate more severe contamination. 展开更多
关键词 TRIBUTYLTIN BENZO[A]pyrene antioxidant defense combined effect Sebastiscus marmoratus
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Photochemical behavior of benzo[a]pyrene on soil surfaces under UV light irradiation 被引量:11
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作者 ZHANG Li-hong LI Pei-jun +1 位作者 GONG Zong-qiang Oni Adeola A. 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第6期1226-1232,共7页
The rates of photodegradation and photocatalysis of benzo [a]pyrene (BaP) on soil surfaces under UV light have been studied. Different parameters such as temperature, soil particle sizes, and soil depth responsible ... The rates of photodegradation and photocatalysis of benzo [a]pyrene (BaP) on soil surfaces under UV light have been studied. Different parameters such as temperature, soil particle sizes, and soil depth responsible for photodegradation, catalyst loads and wavelength of UV irradiation blamed for photocatalysis have been monitored. The results obtained indicated that BaP photodegradation follows pseudo-first-order kinetics. BaP photodegradation was the fastest at 30℃ . The rates of BaP photodegradation at different soil particle size followed the order: less than 1 mm〉less than 0.45 mm〉less than 0.25 mm. When the soil depth increased from 1 mm to 4 ram, the half-life increased from 13.23 d to 17.73 d. The additions of TiO2 or Fe2O3 accelerated the photodegradation of BaP, and the photocatalysis of BaP follows pseudo-first-order kinetics. Changes in catalyst loads of TiO2 (0.5%, 1%, 2%, and 3% (wt)) or Fe203 (2%, 5%, 7%, and 10% (wt)) did not significantly affect the degradation rates. Both BaP photocatalysis in the presence of TiO2 and Fe2O3 were the fastest at 254 nm UV irradiation. 展开更多
关键词 PHOTODEGRADATION PHOTOCATALYSIS BENZO[A]pyrene UV-IRRADIATION
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Phytotoxicity assessment of phenanthrene, pyrene and their mixtures by a soil-based seedling emergence test 被引量:6
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作者 SONGYu-fang GONGPing +1 位作者 ZHOUQi-xing SUNTie-heng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第4期580-583,共4页
Seedling emergence tests were conducted in a meadow brown soil using five plant species(i.e., Chinese cabbage, green onion, tomato, turnip and wheat) to determine the phytotoxicity of phenanthrene, pyrene and their mi... Seedling emergence tests were conducted in a meadow brown soil using five plant species(i.e., Chinese cabbage, green onion, tomato, turnip and wheat) to determine the phytotoxicity of phenanthrene, pyrene and their mixtures. The soil was amended with up to 1000 mg/kg soil of phenanthrene or 600 mg/kg soil of pyrene. Seedling emergence and root growth were measured. The results indicated that root elongation was more sensitive than seedling emergence. Root length decreased with increasing phenanthrene or pyrene concentrations(p≤0 05). Phenanthrene was more phytotoxic than pyrene. The lowest observable adverse effect concentration(LOAEC) was 10 mg/kg for phenanthrene when tested with green onion, and 50 mg/kg for pyrene when tested with wheat. Among the five species, wheat was found to be the most sensitive. When amended jointly at or below their respective LOAEC, phenanthrene and pyrene produced a synergistic toxic effect. 展开更多
关键词 PHENANTHRENE pyrene PHYTOTOXICITY seedling emergence root length combined effects SOIL
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Isolation of marine benzo[a]pyrene-degrading Ochrobactrum sp. BAP5 and proteins characterization 被引量:10
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作者 WU Yirui HE Tengteng +4 位作者 ZHONG Mingqi ZHANG Yueling LI Enmin HUANG Tongwang HU Zhong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第10期1446-1451,共6页
A bacterial strain BAP5 with a relatively high degradation ability of benzo[a]pyrene (BaP) was isolated from marine sediments of Xiamen Western Sea, China and identified as Ochrobactrum sp. according to 16S rRNA gen... A bacterial strain BAP5 with a relatively high degradation ability of benzo[a]pyrene (BaP) was isolated from marine sediments of Xiamen Western Sea, China and identified as Ochrobactrum sp. according to 16S rRNA gene sequence as well as Biolog microbial identification system. Strain BAP5 could grow in mineral salt medium with 50 mg/L of BaP and degrade about 20% BaP after 30 d of incubation. Ochrobactrum sp. BAP5 was able to utilize other polycyclic aromatic hydrocarbons (PAHs) (such as phenanthrene, pyrene and fluoranthene) as the sole carbon source and energy source, suggesting its potential application in PAHs bioremediation. The profile of total soluble protein from Ochrobactrum sp. BAP5 was also investigated. Some over- and special-expressed proteins of strain BAP5 when incubated with the presence of BaP were detected by two-dimensional polyacrylamide gel electrophoresis, and found to be related with PAHs metabolism, DNA translation, and energy production based on peptide fingerprint analysis through matrix-assisted laser desorption/ionization-time of flight mass spectrometry. 展开更多
关键词 BENZO[A]pyrene BIODEGRADATION Ochrobactrum sp. BAP5 PROTEINS
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Uptake and accumulation of phenanthrene and pyrene in spiked soils by Ryegrass(Lolium perenne L.) 被引量:9
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作者 XU Sheng-you CHEN Ying-xu +3 位作者 LIN Qi WU Wei-xiang XUE Sheng-guo SHEN Chao-feng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第5期817-822,共6页
Phytoremediation has long been recognized as a cost-effective method for the removal of polycyclic aromatic hydrocarbons (PAHs) from soil. A study was conducted to investigate the uptake and accumulation of PAHs in ... Phytoremediation has long been recognized as a cost-effective method for the removal of polycyclic aromatic hydrocarbons (PAHs) from soil. A study was conducted to investigate the uptake and accumulation of PAHs in root and shoot of Lolium perenne L. Pot experiments were conducted with series of concentrations of 3.31-378.37 mg/kg for phenanthrene and those of 4.22-365.38 mg/kg for pyrene in a greenhouse. The results showed that both ryegrass roots and shoots did take up PAHs from spiked soils, and generally increased with increasing concentrations of PAH in soil. Bioconcentration factors(BCFs) of phenanthrene by shoots and roots were 0.24- 4.25 and 0.17-2.12 for the same treatment. BCFs of pyrene by shoots were 0.20-1.5, except for 4.06 in 4.32 mg/kg treatment, much lower than BCFs of pyrene by roots (0.58-2.28). BCFs of phenanthrene and pyrene tended to decrease with increasing concentrations of phenanthrene and pyrene in soil. Direct uptake and accumulation of these compounds by Lolium perenne L. was very low compared with the other loss pathways, which meant that plant-promoted microbial biodegradation might be the main contribution to plant-enhanced removal of phenanthrene and pyrene in soil. However, the presence of Lolium perenne L. significantly enhanced the removal of phenanthrene and pyrene in spiked soil. At the end of 60 d experiment, the extractable concentrations of phenanthrene and pyrene were lower in planted soil than in non-planted soil, about 83.24%-91.98% of phenanthrene and 68.53%-84.10% of pyrene were removed from soils, respectively. The results indicated that the removal of PAHs in contaminated soils was a feasible approach by using Lolium perenne L. 展开更多
关键词 PHYTOREMEDIATION polycyclic aromatic hydrocarbons(PAHs) phenanthrene and pyrene uptake and accumulation
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1-Pyrenecarboxaldehyde thiosemicarbazone:A novel fluorescent molecular sensor towards mercury(Ⅱ) ion 被引量:9
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作者 Xue Mei Wang Hua Yan +1 位作者 Xin Lu Feng Yong Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第9期1124-1128,共5页
A novel and simple fluorescent molecular sensor,1-pyrenecarboxaldehyde thiosemicarbazone(Hpytsc),was synthesized.Its higher sensitivity and selectivity to mercury(Ⅱ) ion were studied through absorption and emissi... A novel and simple fluorescent molecular sensor,1-pyrenecarboxaldehyde thiosemicarbazone(Hpytsc),was synthesized.Its higher sensitivity and selectivity to mercury(Ⅱ) ion were studied through absorption and emission channels.The UV-vis spectra show that the increasing mercury(Ⅱ) ion concentrations result in the decreasing absorption intensity.The fluorescence monomer emission of Hpytsc is enhanced upon binding mercury(Ⅱ) ion,which should be due to the 1:1 complex formation between Hpytsc and metal ion. 展开更多
关键词 Fluorescence sensor Mercury(Ⅱ) ion pyrene derivatives THIOSEMICARBAZONE
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n-Hexadecane and pyrene biodegradation and metabolization by Rhodococcus sp. T1 isolated from oil contaminated soil 被引量:5
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作者 Xiaoqiang Jia Yun He +2 位作者 Lei Huang Dawei Jiang Wenyu Lu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第2期411-417,共7页
The high-molecular weight polycyclic aromatic hydrocarbons(PAHs) pyrene and typical long chain alkane nhexadecane are both difficult to degrade. In this study, n-hexadecane and pyrene degrading strain Rhodococcus sp. ... The high-molecular weight polycyclic aromatic hydrocarbons(PAHs) pyrene and typical long chain alkane nhexadecane are both difficult to degrade. In this study, n-hexadecane and pyrene degrading strain Rhodococcus sp. T1 was isolated from oil contaminated soil. Strain T1 could remove 90.81% n-hexadecane(2 vol%) and 42.79% pyrene(200 mg·L^(-1)) as a single carbon within 5 days, respectively. Comparatively, the degradation of pyrene increased to 60.63%, but the degradation of n-hexadecane decreased to 87.55% when these compounds were mixed. Additionally, identification and analysis of degradation metabolites of Rhodococcus sp. T1 in the above experiments showed that there were significant changes in alanine, methylamine, citric acid and heptadecanoic acid between sole and dual substrate degradation. The optimal conditions for degradation were then determined based on analysis of the pH, salinity, additional nutrient sources and liquid surface activity.Under the optimal conditions of pH 7.0, 35 °C, 0.5% NaCl, 5 mg·L^(-1) of yeast extract and 90 mg·L^(-1) of surfactant,the degradation increased in single or dual carbon sources. To our knowledge, this is the first study to discuss metabolite changes in Rhodococcus sp. T1 using sole substrate and dual substrate to enhance the long-chain alkanes and PAHs degradation potential. 展开更多
关键词 BIODEGRADATION METABOLITE N-HEXADECANE pyrene RHODOCOCCUS sp. T1
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