Publications (13)20.61 Total impact
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Article: [Characteristics of atmospheric NO2 in the Beijing-Tianjin-Hebei region and the Yangtze River Delta analyzed by satellite and ground observations].
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ABSTRACT: The interannual variability of NO2 levels in two major Chinese economic regions, the Beijing-Tianjin-Hebei (BTH) economic circle and the Yangtze River Delta (YRD), were studied using multiple years of OMI-retrieved NO2 columns and ground measurements. The NO2 columns were comparable in the two regions, which were - 50% higher than the BTH and YRD regional background and two times higher than the Asia-Europe continental background. Satellite data showed that the high NO2 regions scattered around Beijing and Shanghai in summer, and the coverage of high NO2 regions increased in spring and merged in winter, affecting the entire eastern China. Ground level NO2 concentrations in the urban centers of Beijing and Shanghai were also comparable, which were - 10 times greater than the regional background and 1 000 times higher than the Asia-Europe continental background. As industries gradually migrated out of the urban centers, the NO2 concentrations in Beijing and Shanghai decreased, but the regional background NO2 concentration in BTH and YRD increased. It reflected in part the impact of NO2 emission reductions related to fossil fuel combustion as a result of air quality control measures in BTH and YRD. NO2 levels during the Beijing 2008 Olympic Games and the Shanghai World Expo 2010 decreased temporarily, but bounced back quickly afterwards, indicating that sustainable air quality improvement can only be achieved through long-term regional efforts.Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.] 11/2012; 33(11):3685-92. -
Article: Polybrominated diphenyl ethers exposure in breast milk in Shanghai, China: levels, influencing factors and potential health risk for infants.
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ABSTRACT: The use of polybrominated diphenyl ethers (PBDEs) is increasing annually in China. Although several studies have reported significant contamination by these compounds in biological samples in China, little is known about the factors that may influence the levels of exposure and the potential health risk for infants. We investigated PBDE exposure levels in breast milk, its influencing factors and the potential health risk for infants in Shanghai, China by enrolling 48 healthy women between September 2006 and April 2007. PBDE exposure was assessed by analyses of seven PBDE congeners in breast milk. The estimated daily intake of PBDEs by infants via breastfeeding was determined for evaluating the potential health risk for infants. The median (range) of total PBDE content in breast milk was 8.81 (1.92-41.55) ng/g lipid. 34 (71%) of the 48 samples tested positive for all seven congeners. Maternal education level and household monthly salary were positively associated with PBDE concentration in breast milk (r=0.337, p=0.019 and r=0.436, p=0.004, respectively). The median of estimated daily intake of BDE-99 (6.67 ng/kg/day) by infants via breastfeeding was below the human no adverse effect level (NAEL) set for BDE-99 for neurodevelopmental toxicity (18.8 ng/kg/day). However, 3 (6%) of the samples exceeded the human NAEL. Taking the high detection rate of PBDEs in breast milk together with 6% of their EDI higher than NAEL in Shanghai, more studies on the effects of maternal PBDE exposure on fetal growth and child neurodevelopment are warranted.Science of The Total Environment 07/2012; 433:331-5. · 3.29 Impact Factor -
Article: [Correlations between PBDEs and thyroid hormone concentrations in adults from production source area].
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ABSTRACT: Polybrominated diphenyl ethers (PBDEs) concentrations in 36 resident serum samples from PBDEs production source area were analyzed by gas chromatography/negative chemical ionization/mass spectrometry(GC-NCI-MS) method, and the concentrations of thyroid hormones were determined as well. The sigma5PBDEs (BDE-28, -47, -153, -183, -209) concentrations(lipid weight) in serum ranged from 130.3 to 4 478.4 ng x g(-1), with an average value of 529.9 ng x g(-1). BDE-209 was a dominant PBDE congener, on average accounting for 69.8% of the total PBDEs concentrations. Spearman rank correlation coefficient was calculated between PBDEs and thyroid hormone, it showed that there were high significant negative correlation between BDE-28, -47, -153, -183 and thyroid-stimulating hormone (TSH), and significant negative correlation was also found between BDE-183 and free thyroxine (fT4). Additionally, there were significant positive correlation between BDE-28, -47 and triiodothyronine (T3), as well as between BDE-28, -153, -183 and free triiodothyronine(fT3). In summary, the concentrations of PBDEs in serum in this study were at a high level, and BDE-209 was the predominant congener. The exposure to the PBDEs may affect thyroid hormone levels, and the further research should focus on the relationship between PBDEs and thyroid hormone concentrations.Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.] 11/2011; 32(11):3271-6. -
Article: Levels of polybrominated diphenyl ethers and hexabromocyclododecane in the atmosphere and tree bark from Beijing, China.
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ABSTRACT: Air samples in four seasons at one site and tree bark samples from four districts were determined to investigate seasonal variation and regional distribution of polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD) in Beijing, China. The total concentrations of PBDEs (∑PBDE) and HBCD (∑HBCD) were in the range of 57-470 and 20-1800 pg m(-3) in the atmosphere, respectively. The ∑PBDE and ∑HBCD concentrations were significantly influenced by the total suspended particulate matter in atmosphere. The total concentrations of PBDEs and HBCD in tree bark samples were in the range of 99-3700 and 26-3400 ng g(-1) lipid weight. It was found that regional distribution of PBDEs and HBCD was related to the function of each district. In addition, the study found that weeping willow bark was an ideal atmospheric PBDEs and HBCD passive sampler. Finally, atmospheric levels of BDE-209 and HBCD at tree bark sampling districts were estimated via applying an established bark/air partitioning model, which had been verified by the measured concentrations in tree bark and atmosphere in Beijing.Chemosphere 06/2011; 84(3):355-60. · 3.21 Impact Factor -
Article: [Concentration of polybrominated diphenyl ethers in umbilical cord serum and the influence on newborns birth outcomes in Shanghai].
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ABSTRACT: To explore the concentration of polybrominated diphenyl ethers (PBDEs) in umbilical cord serum and analyze the influence of exposure to PBDEs during fetal stage on newborn birth outcomes in Shanghai. Fifty delivery women in a Shanghai hospital were surveyed by questionnaire, and the umbilical cord serum were collected from September 2006 to April 2007. All the delivery women were singleton pregnancies, excluding high blood pressure, diabetes, HIV infection and adverse medical history. Seven congeners (BDE-28, BDE-47, BDE-99, BDE-100, BDE-153, BDE-154 and BDE-183) were measured by gas chromatography-negative chemical ionization-mass spectrometry and the influencing factors were analyzed. Newborns' length, weight, chest circumference, head circumference and body mass index (BMI) were (50.15 ± 0.75) cm, (3.49 ± 0.42) kg, (34.76 ± 1.51) cm, (35.03 ± 1.40) cm, (13.76 ± 1.36) kg/m(2), respectively. The median of Σ(7PBDEs) concentration in umbilical cord serum was 14.06 (1.03 - 379.73) ng/g lipid weight (lw). The detection rate of BDE-28, BDE-47, BDE-99, BDE-100, BDE-153, BDE-154 and BDE-183 were 22% (11/50), 22% (11/50), 98% (49/50), 72% (36/50), 76% (38/50), 90% (45/50) and 14% (7/50), respectively. The median (range) of PBDEs (BDE-28, BDE-47, BDE-99, BDE-100, BDE-153, BDE-154, BDE-183) congeners were < LOD (< LOD-137.20 ng/g lw), < LOD (< LOD-33.17 ng/g lw), 7.54 ng/g lw (< LOD-94.01 ng/g lw), 1.57 ng/g lw (< LOD-46.95 ng/g lw), 0.63 ng/g lw (< LOD-79.08 ng/g lw), 0.63 ng/g lw (< LOD-22.30 ng/g lw) and < LOD (< LOD-21.63 ng/g lw), respectively. The newborns' BMI showed a negative correlation with BDE-99 (r = -0.347, P < 0.05) and BDE-154 (r = -0.292, P < 0.05). BDE-99 in low-length group (≤ 50 cm, 10.59 ng/g lw) was significantly higher (t = 2.32, P = 0.03) than that in high-length group (> 50 cm, 3.60 ng/g lw). PBDEs were commonly detected in newborns' umbilical cord serum in this study. Our findings indicated that exposure to PBDEs adversely affected the development of the newborns.Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine] 06/2011; 45(6):490-3. -
Article: [Levels of hexabromocyclododecane in human breast milk and the daily intake of newborns in a Shanghai hospital].
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ABSTRACT: To explore the level of hexabromocyclododecane (HBCD) in human breast milk of delivery women in a Shanghai hospital, and estimate the daily intake of newborns from breast milk. Forty-eight delivery women in a Shanghai suburb hospital (Class A, Grade 3) were surveyed by questionnaires, and their breast milk samples were collected from September 2006 to April 2007. All the delivery women were singleton pregnancies, excluding high blood pressure, diabetes, HIV infection and adverse medical history. Three diastereoisomers (α-HBCD, β-HBCD, γ-HBCD) were measured by the liquid chromatography-electrospray ion source-tandem mass spectrometry, and then estimated the daily intake of the newborns from the breast milk. The total HBCD concentration of breast milk, which was detected in 79% (38/48) of samples, ranged from 0.11 ng/g lipid weight (lw) to 37.75 ng/g lw, with the median at 1.42 ng/g lw. The most abundant diastereoisomer was α-HBCD which detected in 77% (37/48) of samples, with a median of 1.24 ng/g lw; followed by γ-HBCD and β-HBCD, detected in 13% (6/48) and 17% (8/48) of samples respectively, whose median were both under the limit of detection (LOD). The daily intake of the newborns from the breast milk ranged from 0.71 ng/kg to 243.46 ng/kg. The concentrations of HBCD in breast milk of delivery women in a Shanghai hospital have been in a high level, and the influence on newborns' health need to be further studied.Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine] 06/2011; 45(6):498-501. -
Article: [Levels of polybrominated diphenyl ethers in human breast milk from a hospital in Shanghai].
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ABSTRACT: To measure the concentration of polybrominated diphenyl ethers (PBDEs) in human breast milk from a hospital in Shanghai and analyze the influencing factors. Forty-eight puerperal from a hospital in Shanghai were selected to answer a questionnaire, and their breast milk samples were collected from September 2006 to April 2007. All the puerperal were singleton pregnancies, excluding high blood pressure, diabetes, HIV infection and adverse medical history. Seven congeners (BDE-28, BDE-47, BDE-100, BDE-99, BDE-154, BDE-153 and BDE-183) were measured by gas chromatography-negative chemical ionization-mass spectrometry and the influencing factors were analyzed. The median of total PBDEs concentration in breast milk was 8.81 ng/g lipid weight (lw), and the range was 1.92 - 41.55 ng/g lw. The detection rates of seven congeners (BDE-28, BDE-47, BDE-100, BDE-99, BDE-154, BDE-153, BDE-183) were 98% (47/48), 96% (46/48), 86% (41/48), 90% (43/48), 83% (40/48), 98% (47/48), 90% (43/48), and the median of them was 0.88, 0.99, 0.97, 1.39, 1.14, 2.17, 1.41 ng/g lw, respectively. LogΣ(7PBDEs) in breast milk from mothers with different education levels were divided into junior high school or lower (0.89 ± 0.24), senior high school (1.02 ± 0.17), junior college or higher (1.08 ± 0.28). LogΣ(7PBDEs) in breast milk from mothers with different income levels were divided as < 1000 yuan (0.89 ± 0.12), 1000 - 3000 yuan (1.01 ± 0.24), > 3000 yuan (1.13 ± 0.21). Correlation analysis showed that both the mothers' education level (r = 0.322, P < 0.05) and income level (r = 0.388, P < 0.05) have a positive correlation to PBDEs levels in breast milk. It is very common to detect PBDEs in human breast milk, however, the education and income levels of the mothers may be the influencing factors.Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine] 06/2011; 45(6):494-7. -
Article: Polybrominated diphenyl ethers in atmosphere and soil of a production area in China: levels and partitioning.
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ABSTRACT: Polybrominated diphenyl ethers (PBDEs) were measured in atmosphere and soil samples taken in winter and summer at a PBDE production area of Laizhou Bay in China. The concentrations of Sigma11PBDE were 0.017-1.17 ng/m3 in gaseous phase, 0.5-161.1 ng/m3 in particulate phase, and 73-2629 ng/g dry weight in soil samples. The PBDE congener pattern in the gaseous phase differed from that in the particulate phase, and the PBDE congener pattern in the particulate phase was similar with that in soil. This demonstrated that there was little difference with atmospheric particle-soil transfer efficiency among PBDE congeners. In addition, there were seasonal variations in percentages on particle for lower brominated congeners. The BDE-28 was mostly in the gaseous phase in summer (88.3%), whereas the average proportion of BDE-28 in gaseous phase in winter was 38.9%. Higher brominated congeners (i.e., BDE-206, BDE-207, BDE-208, and BDE-209) were bound to the atmospheric particulate phase, and their potentials for long-range migration were mainly affected by the environmental behavior of atmospheric particles. Results indicated that PBDE congeners in summer were closer to gas-particle partition equilibrium than in winter. Temperature should be considered the main factor causing nonequilibrium in winter.Journal of Environmental Sciences 01/2011; 23(3):427-33. · 1.66 Impact Factor -
Article: Human exposure to polybrominated diphenyl ethers at production area, China.
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ABSTRACT: The concentrations of polybrominated diphenyl ethers (PBDEs) were detected in air and aquatic products in PBDEs production areas which are located at the south coast area of Laizhou Bay, Shandong province, China in this study. Concentrations of SigmaPBDEs in the air ranged from 0.47 ng/m3 to 161 ng/m3. In aquatic products, concentrations of SigmaPBDEs ranged from 2.7 ng/g wet weight to 42 ng/g wet weight. The mean dietary intake of SigmaPBDEs via aquatic products consumption in this study was 218 ng/day. Daily intake of SigmaPBDEs via inhalation in this study was 612 ng for men and 455 ng for women. With a contribution of 80%, BDE-209 was predominant in the total intake. Dietary intake and breathing inhalation contributed 29 and 71%, respectively, to the total PBDEs intake. The results indicate that breathing inhalation also plays a very significant pathway for the population of the PBDEs production area. Compared with similar studies in other countries, human exposure to PBDEs via diet and inhalation in this study was the highest in the world.Environmental Toxicology and Chemistry 05/2010; 29(5):1031-5. · 2.81 Impact Factor -
Article: Polybrominated diphenyl ethers in the serum and breast milk of the resident population from production area, China.
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ABSTRACT: Polybrominated diphenyl ethers (PBDEs) have been produced in the south coast area of Laizhou Bay, Shandong Province in China, but little is known about the PBDE exposure level of residents to these compounds. We set out to assess potential health risks of PBDEs in the south coast area of the Laizhou Bay by determining the concentrations of PBDEs in serum and breast milk. We measured concentrations of eight PBDE congeners in serum and breast milk. The arithmetic means of Sigma(8)PBDE in pooled serum and breast milk were 613 ng/g lipid and 81.5 ng/g lipid, respectively. The highest concentration for Sigma(8)PBDE in all serum pools was 1830 ng/g lipid from the 41-50 year old female group. BDE-209 was the predominant congener, with the mean concentrations of 403 ng/g lipid in serum and 45.6 ng/g lipid in breast milk, respectively. BDE-209 averagely accounted for 65.8% and 54.2% of the total PBDEs, respectively. Our results suggest that high exposures to PBDEs have led to very high PBDE concentrations in serum and breast milk from the residents living in the south coast area of Laizhou Bay. High PBDE concentrations in human serum, particularly in women, pose a potential public health threat to local residents.Environment international 07/2009; 35(7):1048-52. · 4.79 Impact Factor -
Article: Levels and distribution of polybrominated diphenyl ethers in plant, shellfish and sediment samples from Laizhou Bay in China.
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ABSTRACT: Polybrominated diphenyl ethers (PBDEs) are potentially harmful and persistent environmental pollutants. PBDEs concentrations are reported in plant, shellfish and sediment samples collected from Chinese Laizhou Bay. The summation operator(11)PBDE concentrations in plant and shellfish samples from Laizhou Bay were in the range of 70-5900ngg(-1) and 230-720ngg(-1) lipid, respectively. The summation operator(11)PBDEs concentrations in river sediment intervals samples ranged from 1.3 to 1800ng g(-1) dry weight. Pearson correlation analyses were performed on concentrations of PBDEs congeners of different sediment sample intervals. There were significant positive correlations for BDE 28 and BDE 100 (r=0.945, p<0.01), BDE 47 and BDE 99 (r=0.879, p<0.01), BDE 153 and BDE 154 (r=0.934, p<0.01), nona-BDEs and BDE 209 (r>0.934, p<0.01). BDE 209 was the predominant congener in all analyzed samples, consistent with the fact that deca-BDE technical mixtures are the dominant PBDEs product in Laizhou Bay. Data showed that PBDEs should be considered as an increasing pollution problem in the Laizhou Bay region.Chemosphere 04/2008; 71(6):1043-50. · 3.21 Impact Factor -
Conference Proceeding: A Novel Chain-Cluster Based Routing Protocol for Wireless Sensor Networks
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ABSTRACT: In this paper we propose a new routing protocol for wireless sensor networks called energy-efficient chain-cluster routing protocol (ECR) and introduce the main idea of the protocol architecture. This protocol uses the hybrid way to manage the networks, and it takes advantages of both central control and distributed algorithm to form a topology with two- hierarchical chains' formation. ECR includes a simple but efficient cluster-head-leader selection criterion, which prolongs the time of the first node die in the network and improves the energy efficiency. Advantages of ECR are simulated by comparing with both low-energy adaptive clustering hierarchy (LEACH) and power-efficient gathering in sensor information system (PEGASIS).Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on; 10/2007 -
Article: Spatial distribution of aerosol pollution based on MODIS data over Beijing, China
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ABSTRACT: AbstractWith the help of regression analysis, the relationships were detected between aerosol's contribution to apparent reflectance (ACR) derived from Moderate Resolution Imaging Spectroradiometer (MODIS) on board Terra and hourly PM10 mass concentration measured at 30 ground-based locations in Beijing for the August of 2003 and 2004. It was shown that there was a good correlation between the ACR and PM10 (linear correlation coefficient, R=0.56). On the basis of this relationship, spatial distribution and possible sources of PM10 derived from MODIS were analyzed and two frequently heavily-polluted regions were found, namely downtown of the city and the district near Xishan Mountain. These two regions coincidently are also urban heat island centers. The foundings of this paper will be greatly useful for environmental monitoring and urban planning for Beijing, especially for the 2008 Olympic game to be held in Beijing.Journal of Environmental Sciences 02/2007; · 1.66 Impact Factor
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2012
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Shanghai Jiao Tong University
Shanghai, Shanghai Shi, China -
Minzu University of China
Minzhu, Fujian, China
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