Beijing Municipal Research Institute of Environmental Protection
Beijing Municipal Research Institute of Environmental Protection
Feng L.,Beijing Municipal Research Institute of Environmental Protection |
Chen B.,Beijing Normal University
Energy Procedia | Year: 2016
Energy and water are two interwoven elements of wastewater treatment system (WWTS). Energy is consumed to remove pollutants in wastewater, decrease negative influence on the natural water environment, water is used to generate energy for system input. With the rapid increasing on wastewater quantity, how to improve wastewater treatment efficiency and reduce energy costs has attracted many attentions. However, there is lack of synthesize understanding of the energy-water nexus in WWTS. In this study, a new energy-water nexus conceptual framework is developed, energy used for wastewater extraction, operation of the wastewater treatment process and the waste recycling were explored. Efficiency and redundancy of the WWTS were also examined in structural nexus analysis based on Network Environ Analysis (NEA). The conceptual framework would help to investigate the mechanism and properties of the energy-water nexus for WWTS. © 2016 Published by Elsevier Ltd.
Wu Q.,Beijing Normal University |
Wu Q.,Beijing Municipal Research Institute of Environmental Protection |
Qi J.,Beijing Municipal Research Institute of Environmental Protection |
Xia X.,Beijing Normal University
Science of the Total Environment | Year: 2017
Two dated sediment cores from the Miyun Reservoir of Beijing in China were analyzed to reconstruct the pollution history of heavy metals including cadmium (Cd), chromium (Cr), iron (Fe), nickel (Ni), and zinc (Zn) as well as phosphorus (P). Enrichment factor (EF) and geoaccumulation index (Igeo) were applied to assess the enrichment status of heavy metals. Average EF and Igeo values indicated that the studied heavy metals in the sediments mainly originated from non-point source pollution and soil-water erosion, showing low ecological risks. In addition, correlation analysis and principal component analysis (PCA) identified that Cd, Zn, and P were mainly from agricultural diffusion pollution caused by utilization of the phosphate fertilizer; Zn, Ni, and Cr originated from soil erosion. PCA analysis was further conducted to investigate the relationships among meteorological factors, algae-dominant total organic carbon (TOC), and heavy metals. Results showed that algae-dominant TOC had strong positive correlation with temperature, which can be explained by that increased temperature accelerated the growth of algae. Meanwhile the opposite loadings between algae-dominant TOC and heavy metal suggested that primary production played an important role in migration and transformation of metals. Moreover, stepwise multiple regression models showed that Fe was sensitive to temperature, which accounted for approximately 39.0% and 40.1% of the variations in Fe of two sediment cores, respectively. Fe showed significant decreasing trends during the past 50 years. Reductive environment of water-sediment interface caused by increasing temperature probably contributed to the restoration of ferric iron, resulting in the release of soluble Fe to overlying waters. Future climate change with elevated temperature and extreme weather events will aggravate the ecological risk of heavy metals in water environment due to the enhanced leaching effect and non-point source pollution as well as the release of heavy metals from sediments to water environment. © 2017
Wang D.,Nankai University |
Nie L.,Beijing Municipal Research Institute of Environmental Protection |
Shao X.,Beijing Municipal Research Institute of Environmental Protection |
Yu H.,Nankai University
Science of the Total Environment | Year: 2017
Epidemiologic studies regarding solvent-based paints (SBPs) containing VOCs have demonstrated a strong correlation between chronic and acute adverse health effects and the SBPs. Therefore, new environmentally friendly paints as substitutes containing less or none VOCs have been rapidly developed in research for future sustainable use. However, a few studies focusing on penetration and exposure condition of the substitute have been reported duo to the complexity and inaccessibility of painting industry. Surveys specifically looking at the present status of exposure condition were conducted to ascertain the popularization of water-based paints (WBPs) which concluded that markers of SBPs were detected in all 134 samples indicating bad industrial penetration. VOCs exposure concentrations of painters ranged from 3.8 to 18.2 mg/m3 for WBPs, 3.5 × 103 to 14.8 × 103 mg/m3 for SBPs, respectively. The negative correlation between ambient concentration and breathing zone concentration suggested the former was incapable of representing the actual exposure concentration. The real-time concentration was proved to be closely associated with the activity patterns while the mean concentration level was found mostly dependent on the paint types. Authentic inhalation dose ranged from 7.68 to 15.84 mg (WBPs) and 3.84 to 15.59 g (SBPs), respectively, for occupational painters (work 8 h per day) and the total inhalation dose was estimated through a new conception. The findings suggested that WBPs could significantly reduce VOCs emission and occupational exposure. © 2017 Elsevier B.V.
Zhao X.,Beijing Normal University |
Shen Z.Y.,Beijing Normal University |
Xiong M.,Changjiang River Scientific Research Institute |
Qi J.,Beijing Municipal Research Institute of Environmental Protection
International Journal of Environmental Science and Technology | Year: 2011
In this study, key uncertainty sources analysis was undertaken for a dynamic water model using a First order error analysis method. First, a dynamic water quality model for the Three Gorges Reservoir Regions was established using data after impoundment by the environmental fluid dynamics code model package. Model calibration and verification were then conducted using measured data collected during 2004 and 2006. Four statistical indices were employed to assess the modeling efficiency. The results indicated that the model simulated the variables well, with most relative error being less than 25 %. Next, input and parameter uncertainty analysis were conducted for ammonia nitrogen, nitrate nitrogen, total nitrogen, and dissolved oxygen at 3 grid cells located in the upper, middle and downstream portions of the research area. For the nitrogen related variables, input from Zhutuo Station, the Jialingjiang River, and the Wujiang River were the main sources of uncertainty. Point and nonpoint sources also accounted for a large ratio of uncertainty. Moreover, nitrification contributed some uncertainty to the estimated ammonia nitrogen and nitrate nitrogen. However, reaeration was found to be a key source of uncertainty for dissolved oxygen, especially at the middle and downstream reaches. The analysis conducted in this study gives a quantitative assessment for uncertainty sources of each variable, and provides guidance for further pollutant loading reduction in the Three Gorge Reservoir Region. © IRSEN, CEERS, IAU.
Zhang L.,Beijing Normal University |
Yang Z.,Beijing Normal University |
Liang J.,Beijing Municipal Research Institute of Environmental Protection |
Cai Y.,Dalhousie University
Energies | Year: 2011
With support of GIS tools and Theil index, the spatial variance of urban energy consumption in China was discussed in this paper through the parallel comparison and quantitative analysis of the 30 provincial capital cities of mainland China in 2005, in terms of scale, efficiency and structure. The indicators associated with urban energy consumption show large spatial variance across regions, possibly due to diversities of geographic features, economic development levels and local energy source availability in China. In absolute terms, cities with the highest total energy consumption are mostly distributed in economic-developed regions as Beijing-Tianjin-Tangshan Area, Yangtze River Delta and Pearl River Delta of China, however, the per capita urban energy use is significantly higher in the Mid-and-Western regions. With regard to the energy mix, coal still plays the dominant role and cities in Mid-and-Western regions rely more on coal. In contrast, high quality energy carrier as electricity and oils are more used in southeast coastal zone and northern developed areas. The energy intensive cities are mainly located in the northwest, while the cities with higher efficiency are in southeast areas. The large spatial variance of urban energy consumption was also verified by the Theil indices. Considering the Chinese economy-zones of East, Middle and West, the within-group inequalities are the main factor contributing to overall difference, e.g., the Theil index for per capita energy consumption of within-group is 0.18, much higher than that of between group (0.07), and the same applies to other indicators. In light of the spatial variance of urban energy consumptions in China, therefore, regionalized and type-based management of urban energy systems is badly needed to effectively address the ongoing energy strategies and targets. © 2010 by the authors.
Ji L.,Lanzhou University |
Zhou L.,Lanzhou University |
Bai X.,Tsinghua University |
Shao Y.,Lanzhou University |
And 4 more authors.
Journal of Materials Chemistry | Year: 2012
A one-step thermal decomposition strategy, in which a novel reductant participated, was developed to prepare superparamagnetic nearly cubic monodisperse Fe 3O 4 nanoparticles loaded on multiwall carbon nanotubes (MWCNTs/Fe 3O 4). Subsequently, the as-prepared MWCNTs/Fe 3O 4 nanocomposites were modified with 3-aminopropyltriethoxysilane (APTS) (MWCNTs/Fe 3O 4-NH 2). The materials were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometry (VSM) and the BET surface area method. The results indicated that superparamagnetic Fe 3O 4 nanoparticles were successfully loaded onto the surface of the MWCNTs, and APTS was also modified on the MWCNTs/Fe 3O 4 magnetic nanocomposites. The two as-prepared magnetic nanocomposites were used as adsorbents to remove tetrabromobisphenol A (TBBPA) and Pb(ii) from wastewater. The adsorption kinetics and adsorption isotherms of TBBPA and Pb(ii) on the two as-prepared adsorbents were studied at pH 7.0 and 5.3, respectively. It was revealed that MWCNTs/Fe 3O 4-NH 2 performed better than the MWCNTs/Fe 3O 4 nanocomposites for the adsorption properties of TBBPA and Pb(ii). After adsorption, both adsorbents could be conveniently separated from the media by an external magnetic field within several seconds, and regenerated in 0.1 M NaOH solution. © 2012 The Royal Society of Chemistry.
Gong H.,Tsinghua University |
Yan Z.,Beijing Municipal Research Institute of Environmental Protection |
Liang K.Q.,Beijing Municipal Research Institute of Environmental Protection |
Jin Z.Y.,Tsinghua University |
Wang K.J.,Tsinghua University
Desalination | Year: 2013
The utilization of liquid digestates from centralized biogas plants commonly used in the agricultural sector of China is limited by the high transportation and storage costs resulting from their extremely large volumes. A pilot-scale disk tube-reverse osmosis (DT-RO) system was set up in the biogas plant of a poultry farm to test the efficiency of the concentrating process. This set up was operated for 1. year to optimize the system and evaluate membrane fouling. The liquid digestate volume remarkably decreased by about 25%, with a concentration factor of 4 under an operation pressure of 45. bar to 55. bar. Nutrients and mineral elements were simultaneously accumulated and total nitrogen and total phosphorus increased by 4.2 and 4.4 times, respectively. The total amino acid in the concentrated digestate reached 4.93. g/L. SEM-EDS analysis showed that membrane fouling was an integrated result of inorganic and organic fouling. © 2013 Elsevier B.V.
Luo J.,CAS Research Center for Eco Environmental Sciences |
Luo J.,Beijing Municipal Research Institute of Environmental Protection |
Lei B.,CAS Research Center for Eco Environmental Sciences |
Ma M.,CAS Research Center for Eco Environmental Sciences |
And 2 more authors.
Water Research | Year: 2011
Assignment of ecological impacts of contamination to specific classes of contaminants is a prerequisite for risk assessment and remediation. In this study, the combination of polarity-based fractionation, two-hybrid yeast bioassay, and chemical analysis were used to evaluate and identify estrogen receptor agonists (ER-agonists) in sediments from Wenyu River, Beijing, China. By bioassay, organic raw sediment extracts could induce significant estrogenicity and the bioassay-derived 17β-estradiol equivalents (EEQs) of raw extracts (EEQraws) ranged from 0.8 to 19.8 ng/g dry weight. By polarity-based fractionation, the raw extracts were separated into three fractions, i.e. non-polar, moderately polar, and polar fractions, which were subjected to bioassay and chemical analysis. The highest estrogenicity was observed in the polar fraction, which accounted for more than 78% of the total. The medium polar fraction contains PAHs and OCPs, and the estrogenic activities in this fraction contributed 3%-12% of the total in raw extract. An estrogenic activity of non-polarity fraction was negligible in compare to other two fractions. By chemical analysis and toxic equivalent calculation, major part of the estrogenicity in polar fraction could be attributed to six natural/synthetic estrogens (16%-63%), i.e. 17β-estradiol, estrone, estriol, 17α-ethynylestradiol, diethylstilbestrol, and β-estradiol-17-valerate, and to nonylphenols (26%-55%). The proposed approach has been successfully used for characterization of ER-agonists in this case study. © 2011 Elsevier Ltd.
Wang D.,Beijing University of Civil Engineering and Architecture |
Shi X.X.,Beijing University of Civil Engineering and Architecture |
Yin J.Y.,Beijing Municipal Research Institute of Environmental Protection
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2015
Support Vector Machine(SVM) is widely used in the pattern classification and regression analysis, as well as SVM is a kind of artificial intelligent method at present in China. In nature SVM is essentially a kernel method. this paper adapts RBF, linear and Sigmoid kernel separately to establish SVM model for training and predicting the air conditioning hourly load of a bank in summer. At the same time the comparisons among them are produced, the results show that the model based on RBF kernel function holds stronger extensive ability and higher learning capacity. ©, 2015, The editorial office of Transaction of China Electrotechnical Society. All right reserved.
Yu J.,Beijing Municipal Research Institute of Environmental Protection
Advanced Materials Research | Year: 2011
The problem and several restricted factors of agriculture application of sewage sludge are analyzed at home and abroad. Meanwhile, this paper points out that the several restricted factors of agriculture application include mainly: hazardous chemical matters and heavy metal, receptivity of farmers and consumers to the product of sewage sludge, perfect policy and criterion standards, disposing charge of sewage sludge. The several restricted factors of agriculture application should be resolved if sewage sludge is used safely and environment. © (2011) Trans Tech Publications.