Ben W.,University of Chinese Academy of Sciences |
Wang J.,Chinese Academy of Agricultural Sciences |
Wang J.,Key Laboratory of Energy Resource Utilization from Agricultural Residues |
Pan X.,Foreign Economic Cooperation Office |
Qiang Z.,University of Chinese Academy of Sciences
Chemosphere | Year: 2017
This work investigated the dissemination of antibiotic resistance genes (ARGs) encoding resistance to sulfonamide and tetracycline antibiotics in nine swine feedlots located in Shandong Province of China, and examined their potential removal by various on-farm treatment processes. Results indicate that the target ARGs were widely distributed in swine wastes, with mean relative abundances ranging from 3.3 × 10−5 (tetC) to 5.2 × 10−1 (tetO) in swine manure and from 7.3 × 10−3 (tetC) to 1.7 × 10−1 (tetO) in swine wastewater. The mean relative ARG abundances ranged from 9.9 × 10−5 (tetW) to 1.1 × 10−2 (tetO) in soils and from 3.1 × 10−4 (tetW) to 1.1 × 10−2 (sul2) in receiving river sediments, indicating that the farmland application of swine manure compost and the discharge of swine wastewater promoted the dissemination of ARGs into adjacent environments. Microbial fermentation bed (MFB) could reduce the relative ARG abundances by 0–1.18 logs. However, septic tank, biogas digester and natural drying methods were relatively ineffective for ARG removal, and the relative abundances of some ARGs (i.e., tetC, tetG, sul1, and sul2) even increased by 0.74–3.90 logs in treated wastes. Bacterial diversity analysis indicates that the evolution of bacterial communities in the MFB played a crucial role in eliminating the ARGs. This study helps the effective assessment and management of ecological risks arising from ARGs in swine feedlots. © 2016 Elsevier Ltd
News Article | May 11, 2017
BEIJING, May 11, 2017 /PRNewswire/ -- An advanced control system against mining contamination, independently developed by Beijing GeoEnviron Engineering & Technology Inc (BGE), has been listed as one of the 3iPET TOP 100 environmental protection technologies supported by Chinese Ministry of Environmental Protection. The 3iPET Top 100 Environmental Protection Technologies Contests is launched by Foreign Economic Cooperation Office (FECO) of Ministry of Environmental Protection (MEP) of China. An efforts as China is exploring the best technologies and cooperation networks among official and private organizations and companies, both domestic and international, in the hope to provide the best opportunities to promote technologies to solve environmental problems in China and around the world. The vertical barrier system, which could effectively control, separate and block contaminants from polluting underground water and soils in dredge mining operations, is one of the core technologies independently developed by BGE (XSHG: 603588), a leading player in the industry that provides advanced pollution prevention and treatment solutions in China. The technology, which is expected to become the most eco-friendly solution to the rising potential threats caused by leakage of toxic and harmful obstacles in abandoned mines as well as aging refuse landfills in the cities, has been honored the third prize of Science and Technology of Environmental Protection, and selected on the list of 2015 National Key Environmental Protection Practical Technology. So far, the vertical barrier technology has been successfully used in a series of projects in China, including Zijin Mining Project in Fujian province and Chihong Zn&Ge project in Yunnan province, which the vertical barrier wall was used to contain groundwater flow and migration of metal ion, as well as Jingjiang Project in Jiangsu province to contain groundwater flow and migration of organic chemicals. Originally founded in 1992, BGE, whose predecessor was Lining Engineering Department of the Institute of High Energy Physics of Chinese Academy of Science, has been committed in environment technology researches and providing solutions to pollution prevention and control. BGE was listed on the A-share (XSHG: 603588) at Shanghai Stock Exchange on December 29th. 2014. It has about 1400 employees with total assets of 4.4 billion Yuan. At present, BGE owns 138 patented technologies, 6 software copyrights. BGE has hosted or participated in the setting of 38 national and professional standards and technical specification. As a member of International Association of Geosynthetic Installers (IAGI) and International Geosynthetics Society (IGS) since 2006, BGE has been a pioneer in exploring the international market with completing projects in Kazakhstan, Indonesia, Mongolia, Laos and Myanmar. BGE has also set up an branch together with the Indonesian government to promote local industrial upgrading by BGE's advanced incineration technology. To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/beijing-geoenvirons-key-technology-awarded-as-top-100-in-china-300455147.html
Li X.-Y.,Guizhou Normal University |
Liu Y.-Q.,Foreign Economic Cooperation Office
Huanjing Kexue/Environmental Science | Year: 2013
To study the distribution of heavy metals in outdoor settled dusts in different functional areas, based on the literature published, we described the difference in heavy metal accumulation in functional areas and their sources by comparing and analyzing the data of heavy metal concentrations in some capital cities. The results showed that industrial area had the highest heavy metal concentration, followed in descending order by residential area and commercial area, and finally, traffic area. The levels of Zn and Pb in the four functional areas showed higher spatial variability, while there was little difference in Cu and Cd levels. Compared to the heavy metal concentration in urban soils, industrial area appeared heavily accumulated and traffic area appeared lighter accumulated with heavy metals, while there was little difference among other three functional areas expect industrial area. The accumulation of Cd in the four functional areas showed the lowest spatial variability.
Yan D.,Chinese Research Academy of Environmental Sciences |
Peng Z.,Foreign Economic Cooperation Office |
Karstensen K.H.,Sintef |
Ding Q.,Chinese Research Academy of Environmental Sciences |
And 2 more authors.
Science of the Total Environment | Year: 2014
The destruction of DDT formulations and DDT contaminated soil was conducted by feeding wastes into the flue gas chamber at the kiln inlet of two different preheater/precalciner cement kilns in China. The concentration of DDT, PCDD/PCDFs and HCB were measured in the flue gas of the main stack, in the solid material under baseline conditions and when feeding DDT-wastes. The destruction efficiency and the destruction and removal efficiency for DDT were in the range of 99.9335%-99.9998% and 99.9984%-99.9999%, respectively. The emissions of PCDD/PCDFs and HCB in the flue gas varied in the range of 0.0019-0.0171ng I-TEQ/Nm3 and 0.0064-0.0404μg/Nm3, respectively. The emission factor for PCDD/PCDF and HCB varied from 0.0137 to 0.0281μg/ton and from 17.32 to 109.34μg/ton of clinker, respectively. The concentration of PCDD/PCDFs and HCB in solid samples decreased as follows: cement kiln dust, 4.1-5ng I-TEQ/kg and 0.70-0.71μg/kg, respectively; >raw meal, 0.82-0.97ng I-TEQ/kg and 0.18μg/kg, respectively; >cement clinker, 0.09-0.22ng I-TEQ/kg and 0.14-0.18μg/kg, respectively. This study indicates that the feeding of DDT and POPs-wastes to the lower temperature part of a cement kiln system possibly to create a buildup of trace not-destroyed compounds in the system and might cause emissions; the technical feasibility and the environmental acceptability of this practice need to be investigated thoroughly. © 2014 Elsevier B.V.
Hu X.,CAS Research Center for Eco Environmental Sciences |
Zhu J.,CAS Research Center for Eco Environmental Sciences |
Ding Q.,Foreign Economic Cooperation Office
Journal of Hazardous Materials | Year: 2011
Remediation action is critical for the management of polychlorinated biphenyl (PCB) contaminated sites. Dozens of remediation technologies developed internationally could be divided in two general categories incineration and non-incineration. In this paper, life cycle assessment (LCA) was carried out to study the environmental impacts of these two kinds of remediation technologies in selected PCB contaminated sites, where Infrared High Temperature Incineration (IHTI) and Base Catalyzed Decomposition (BCD) were selected as representatives of incineration and non-incineration. A combined midpoint/damage approach was adopted by using SimaPro 7.2 and IMPACTA2002+ to assess the human toxicity, ecotoxicity, climate change impact, and resource consumption from the five subsystems of IHTI and BCD technologies, respectively. It was found that the major environmental impacts through the whole lifecycle arose from energy consumption in both IHTI and BCD processes. For IHTI, primary and secondary combustion subsystem contributes more than 50% of midpoint impacts concerning with carcinogens, respiratory inorganics, respiratory organics, terrestrial ecotoxity, terrestrial acidification/eutrophication and global warming. In BCD process, the rotary kiln reactor subsystem presents the highest contribution to almost all the midpoint impacts including global warming, non-renewable energy, non-carcinogens, terrestrial ecotoxity and respiratory inorganics. In the view of midpoint impacts, the characterization values for global warming from IHTI and BCD were about 432.35 and 38.5kg CO2-eq per ton PCB-containing soils, respectively. LCA results showed that the single score of BCD environmental impact was 1468.97 Pt while IHTI's score is 2785.15 Pt, which indicates BCD potentially has a lower environmental impact than IHTI technology in the PCB contaminated soil remediation process. © 2011 Elsevier B.V.
Ben W.,CAS Research Center for Eco Environmental Sciences |
Pan X.,Foreign Economic Cooperation Office |
Qiang Z.,CAS Research Center for Eco Environmental Sciences
Environmental Sciences: Processes and Impacts | Year: 2013
Swine wastewater represents an important pollution source of antibiotics in the environment; however, regional data about residual antibiotics in swine wastewater are very limited at present. This study investigated the concentrations of three classes of commonly used veterinary antibiotics, including five sulfonamides (SAs), three tetracyclines (TCs) and one macrolide (tiamulin, TIA), in swine wastewater collected from 21 concentrated animal feeding operation (CAFO) sites in Shandong Province, China. Both the liquid and solid (i.e., suspended solids) phases of swine wastewater were analyzed to determine the total concentration of each studied antibiotic. Results indicate that sulfamethazine had the highest median concentration (14.56 μg L -1), followed by oxytetracycline (OTC, 8.05 μg L-1) and chlortetracycline (CTC, 6.01 μg L-1). The maximum detected concentration reached up to 2.02 mg L-1 (OTC) and the highest detection frequency was 95.1% (CTC). The median concentrations and detection frequencies of antibiotics in winter samples were generally higher than those in summer samples (except CTC). The log Kd values were in the range of 1.31-1.96 for SAs, 2.05-2.33 for TCs, and 1.54-1.58 for TIA in swine wastewater. More TCs (14-28%) preferred to partition in the solid phase than SAs (2-10%) and TIA (5-10%), indicating that the suspended solids of swine wastewater may not be ignored. © 2013 The Royal Society of Chemistry.
Li S.,CAS Research Center for Eco Environmental Sciences |
Tian Y.,Foreign Economic Cooperation Office |
Ding Q.,Foreign Economic Cooperation Office |
Liu W.,CAS Research Center for Eco Environmental Sciences
Chemosphere | Year: 2014
High concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) have been found to be produced in chemical processes in which chlorine is a raw material. Samples of workshop air, waste water, waste acid, and the dicofol product were collected from a pesticide factory in China that uses a closed-system dicofol production process, and were analyzed for PCDD/Fs and σDDTs. The σDDTs concentrations were 1.88-17.53μgm-3 in the workshop air samples, 4.85-456μgkg-1 in the waste water and waste acid samples, and 4.74gkg-1 in the dicofol product. The total estimated daily intakes of σDDTs for workers by inhalation in the workplace were in the range of 0.38-3.51μgkg-1bwd-1 for moderate activities. The annual amounts of σDDTs and p,p'-DDT directly released to the environment via the use of dicofol were 9480kg and 1080kg, respectively. The PCDD/F toxicity equivalent values (I-TEQs) in the waste water and waste acid samples ranged from 1.5 to 122pg I-TEQkg-1 and 86.3ng I-TEQ kg-1 in the dicofol sample. The annual amount of PCDD/Fs released to the environment was 0.17g I-TEQ. From the PCDD/F distribution patterns, it is suggested that the major pathway for PCDD/F formation involves precursor synthesis during the production of dicofol in the closed-system process. © 2013 Elsevier Ltd.
Lu S.-Y.,Zhejiang University |
Mao Q.-J.,Zhejiang University |
Peng Z.,Foreign Economic Cooperation Office |
Li X.-D.,Zhejiang University |
Yan J.-H.,Zhejiang University
Chinese Physics B | Year: 2012
A kinetic model is proposed for simulating the trajectory of a single milling ball in a planetary ball mill, and a model is also proposed for simulating the local energy transfer during the ball milling process under no-slip conditions. Based on the kinematics of ball motion, the collision frequency and power are described, and the normal impact forces and effective power are derived from analyses of collision geometry. The Hertzian impact theory is applied to formulate these models after having established some relationships among the geometric, dynamic, and thermophysical parameters. Simulation is carried out based on two models, and the effects of the rotation velocity of the planetary disk and the vial-to-disk speed ratio ω/ on other kinetic parameters is investigated. As a result, the optimal ratio ω/ to obtain high impact energy in the standard operating condition at ω= 800 rpm is estimated, and is equal to 1.15. © 2012 Chinese Physical Society and IOP Publishing Ltd.
Zhang W.,Foreign Economic Cooperation Office |
Pan X.,Foreign Economic Cooperation Office
Advances in Climate Change Research | Year: 2016
The 21st Conference of Party (COP21) held in Paris at the end of 2015 has opened a new era for the joint response dealing with climate change globally, and built up a new mode of global climate governance, that is, "all Parties submit INDC - global stocktake - enhance effort of actions - all Parties resubmit INDC - finally achieve the ultimate objective of the Convention." With 160 INDC reports (covering 188 Parties) that the UNFCCC Secretariat has currently received as research objects, this study classifies the mitigation targets of all Parties, and focuses on the systematic analysis of the financial demand, mitigation cost and priority investment areas for developing countries. The results are as follows: among 160 INDC reports, 122 reports clearly include the finance content; 64 reports propose specific amount of financial demand for the implementation of INDC; 31 reports pre-estimate domestic amount and financial demand for greenhouse gas mitigation in 2030, based on which they have calculated that the average mitigation cost for developing countries in 2030 would have reached up to US$22.3 per ton CO2; 28 Parties reclassify the financial demand for mitigation and adaptation areas, and reach the conclusion that the overall financial demand ratio for mitigation and adaptation is 1.4. Should the current mitigation commitments of the Parties from developed countries be used as benchmark, then in 2030 the total amount of financial demand for developing countries in response to climate change would have reached up to US$474 billion. © 2016 National Climate Center (China Meteorological Administration).
Tian Y.J.,Foreign Economic Cooperation Office |
Ding Q.,Foreign Economic Cooperation Office
Advanced Materials Research | Year: 2014
All of POPs chemicals in the first round list have been banned to be produced and used in China from 2009. The issue on exposure risk assessment of the obsolete production facilities for POPs is going to be discussed in this paper. Based on assessment method in the USA Region 9's Preliminary Remediation Goals, the commended model of exposure risk assessment has been reached. © (2014) Trans Tech Publications, Switzerland.