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Li T.-T.,Hunan University | Liu Y.-G.,Hunan University | Peng Q.-Q.,Hunan University | Peng Q.-Q.,Hunan Environmental Monitoring Center | And 5 more authors.
Chemical Engineering Journal | Year: 2013

The adsorption of Pb(II) ions from aqueous solution with ethylenediamine-modified yeast biomass coated with magnetic chitosan microparticles (EYMC) was studied in batch adsorption system. The adsorption of Pb(II) ions increased with the rising pH and a higher adsorption capacity was achieved at the pH 4.0-6.0. The experiment data was well matched by Langmuir model and Freundlich model, while Langmuir model showed the best description. The maximum adsorption capacities obtained by Langmuir model were 121.26, 127.37 and 134.90mgg-1 at 20, 30 and 40°C, respectively. Kinetic studies indicated that the pseudo-second-order model was appropriate to describe the adsorption process and film diffusion maybe governed the rate of the adsorption. Thermodynamic studies revealed that a spontaneous and endothermic adsorption process. The adsorbents, EYMC can be well recovered by 0.1M EDTA. © 2012 Elsevier B.V.

Shang G.,Shanghai JiaoTong University | Liu L.,Shanghai JiaoTong University | Chen P.,Shanghai JiaoTong University | Shen G.,Shanghai JiaoTong University | Li Q.,Hunan Environmental Monitoring Center
Journal of the Air and Waste Management Association | Year: 2016

ABSTRACT: The biochar derived from rice hull was evaluated for its abilities to remove hydrogen sulfide (H2S) from gas phase. The surface area and pH of the biochar were compared. The biochar derived from rice hull was evaluated for its abilities to remove hydrogen sulfide (H2S) from gas phase. The surface area and pH of the biochar were compared. The different pyrolysis temperature has great influence on the adsorption of H2S. At the different pyrolysis temperature, the H2S removal efficiency of rice hull-derived biochar was different. The adsorption capacities of biochar were 2.09 mg·g–1, 2.65 mg·g–1, 16.30 mg·g–1, 20.80 mg·g–1, and 382.70 mg·g–1, which their pyrolysis temperatures were 100 °C, 200 °C, 300 °C, 400 °C and 500 °C respectively. Based on the Yoon-Nelson model, it analyzed the mass transfer mechanism of hydrogen sulfide adsorption by biochar. Implications: The paper focuses on the biochar derived from rice hull–removed hydrogen sulfide (H2S) from gas phase. The surface area and pH of the biochar were compared. The different pyrolysis temperatures have great influence on the adsorption of H2S. At the different pyrolysis temperatures, the H2S removal efficiency of rice hull–derived biohar was different. The adsorption capacities of biochar were 2.09, 2.65, 16.30, 20.80, and 382.70 mg·g−1, and their pyrolysis temperatures were 100, 200, 300, 400, and 500 °C, respectively. Based on the Yoon-Nelson model, the mass transfer mechanism of hydrogen sulfide adsorption by biochar was analyzed. © 2016 A&WMA.

Guo J.,Xiangtan University | Luo Y.,Hunan Environmental Monitoring Center | Ge F.,Xiangtan University | Ding Y.,Xiangtan University | Fei J.,Xiangtan University
Microchimica Acta | Year: 2011

A composite film made from a thiol-functionalized mesoporous molecular sieve and an ionic liquid is introduced for use in a voltammetric sensor for Cd(II). The electrode exhibits excellent sensitivity towards Cd(II) in showing a markedly increased stripping peak current. Following the optimization of the experimental parameters, a linear response is obtained in the concentration range from 29 nM to 0.87 mM of Cd(II). The detection limit is as low as 1.0 nM (at S/N = 3) after an accumulation at -1.1 V for 4 min. The method was successfully applied to determine Cd(II) in water samples. Features such as large electroactive area, fast electron transfer and low background current make this electrode a promising platform for fabricating reliable electrochemical sensors for various species, such as heavy metals and environmental pollutants. © 2010 Springer-Verlag.

Yu P.,Central South University | Zhang L.,Central South University | Chen H.,Central South University | Luo Y.,Hunan Environmental Monitoring Center | Si S.,Central South University
Chinese Journal of Sensors and Actuators | Year: 2010

A novel conductive polymer electrode (CPE) in-situ coated with bismuth film was proposed to detect trace heavy metal ions, copper, lead, cadmium and zinc by anodic stripping voltammetry. The differences in performance between CPE and screen-printed carbon electrode(SPE) were compared. Additionally, the influences of preconcentration time and several supporting electrolytes on the determination of heavy metal ions with CPE were investigated. Experimental results showed that the peak potentials were 0. 05 V for Cu2+, - 0. 55 V for Pb2+, -0. 80 V for Cd2+ , - 1. 10 V for Zn 2+ at bismuth-modified CPE. The peak currents changed linearly with the coricentration of Cu2+, Pb2+, Cd2+, Zn 2+ and the detection limits were 0.5 μg/L, 1 μg/L, 1 μg/L and 0.5 μg/L, respectively. The CPE used in this study was more sensitive and stable than SPE for the determination of trace heavy metal ions, and supplied a good foundation for the development of disposable electrochemical sensors.

Yin K.,CAS Research Center for Eco Environmental Sciences | Wang R.,CAS Research Center for Eco Environmental Sciences | Yao L.,CAS Research Center for Eco Environmental Sciences | Liang J.,Hunan Environmental Monitoring Center
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2011

Up to 2010, there were 71 cities and 5 municipalities awarded the title of National Model City for Environmental Protection, other 124 cities are actively engaged in pursuing this title. "Model City" obeys principles of sustainable development strategy, and the evaluating methods for urban sustainable development had been the focus of the worldwide researches. Ecological footprint method, economic welfare index of sustainable development, human development index and other methods were applied to assess the level of citieś sustainability. In recent years, eco-efficiency was introduced in assessing the level of citieśsustainability. City is a social-economic-natural complex ecological system with multiple input and output of material, energy and information. In this study, data envelopment analysis method was applied, appropriate input and output indicators were selected, the differences of eco-efficiency between the existing model cities were analyzed, and the input and output redundancy was indentified, which provided theoretical basis for ratings and promoting of Model Cities for Environmental Protection. 12 indictors were selected out, including 5 input indicators, 6 undesired output indicators, 1 desired output. Main results are: (1) Compared three different analyzing models, undesired output were characterized with negative weights (Model-I); take the undesired output as input (Model-II); use desired output minus the input, then divided by the undesired output (Model-III). Scores and numbers of the DEA efficient units were not changed, and the scores of the non-DEA efficient unit followed an upward trend. (2) Twenty cities were DEA efficient (which scores are 1 according to data envelopment analysis) according to the three models, accounting for 46. 5% of the overall evaluation set. Comparing the model cities around the Bohai economic circle, the Pearl River Delta economic circle and the coastal economic zone of Fujian to the cities around the Yangtze River Delta economic circle, the eco-efficiency of the former were better. (3) For all non-DEA efficient cities (which scores below 1 according to data envelopment analysis), we could reduce 1876 million tons of wastewater emissions, 4. 178 million tons of chemical oxygen demand, 0.558 million tons of industrial sulfur dioxide emissions, 0. 258 million tons of industrial soot, 0. 5976 million tons of industrial dust, 67. 604 million tons of industrial solid waste, the overall energy consumption can reduce 1007.676 million tons of stand coal, the total water supply reduce 2904. 913 million cubic meters, the construction land could reduce 3604.19 square kilometers, total fixed asset investment would reduce 829. 538 billion yuan, but the GDP could increase 1844.719 billion yuan. (4) The city which has better economic performance, the eco-efficiency may not be high, such as Shanghai, Tianjin, Guangzhou and Nanjing. Shenzhen, Ningbo, Qingdao become the typical city in which social, economic and natural are coordinated development. In this study, we only considered the time-section data of 2009, could not analysis the dynamic process of the city, so the trends can't be pointed out. Moreover, the full array polygon evaluation method could better reflect the sustainable development level of the city, from the view of time, space, volume, structure and sequence. In addition, the future research will focus on the driving mechanism of the eco-efficiency.

Yin K.,CAS Research Center for Eco Environmental Sciences | Wang R.,CAS Research Center for Eco Environmental Sciences | Zhou C.,CAS Research Center for Eco Environmental Sciences | Liang J.,Hunan Environmental Monitoring Center
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2012

Industrial ecology, eco-efficiency, eco-design, X multiple of revolution are theoretical basis for sustainable development. Among these, eco-efficiency is the most popular method for quantitative analysis. The concept of eco-efficiency was firstly put forward in the academic by Schaltegger and Sturn in the year 1990. Being promoted greatly by the World Business Council for Sustainable, eco-efficiency has obtained great attention in sustainable development research. Claude Fussler firstly introduced the concept of eco-efficiency to China in 1995. There are many achievements in the researches of eco-efficiency in china in recent ten years. Different accounting methods of eco-efficiency in different researching fields were developed, especially in the researches on circular economy in different scales of urban, regional and national level. In this paper, eco-efficiency counting methods and applications in different scales have been sum up based on the review of relevant literature in recent ten years. The accounting methods of eco-efficiency were divided into three categories: (1) Economic/environmental single ratio method. Sometimes, the total production of the product or service, total sales and the total net sales were used to stand for the economic dimension. Resources consumptions, carbon dioxide emissions or other environmental impacts were used to present the environmental dimension. (2) Indicator system method was consisted by indicators which independent from each other but stand for each sections of the research subject. The indicator system method is suit for analyzing the complex systems which contains social, economic and natural subsystems. (3) Modeling method. Data envelopment analysis method is the main method, and other productivity models have been used for eco-efficiency analysis. Then, eco-efficiency could be applied on different scales, such as plant, industry, regional and etc. According to the summarize of current researches, we found that: (1) Researches on eco-efficiency have shifted from simple evaluation to driving mechanism exploring shown in international literatures, but domestic researches still remain in the simple evaluation level. (2) Modeling and methods of eco-efficiency exist in the area of accounting, finance and productivity have been brought to modify and correct the economic/ecological ratio model, while domestic researches focus on building a multi-index system of eco-efficiency, and apply the productivity models for assessment. (3) In the area of eco-efficiency application, international researches showed interests on industrial system and its production system, and applied eco-efficiency method to eco-design and product development. Comparatively, domestic researches mainly focus on the assessment of ecological parks, urban and regional areas, but very few researches in the scale of industrial scale. (4) International researches of eco-efficiency were associated with global ecological issues, such as global warming, biodiversity, food security, while domestic researches focused on analyzing pollutants and wastes. (5) Current studies didn't explain the roots of ecological and environmental crisis, and the social dimensions were usually not taking into consideration. Finally, the article point out, domestic government should spread the notion of eco-efficiency, propel the researches and applications both in micro and large scale; Improve the eco-efficiency accounting methodology with theories and methods of economy, management, accounting and other disciplines; Use the full array polygon graphical methods to reflect the different aspects of the social-economic-natural complex ecological system.

Yin K.,CAS Research Center for Eco Environmental Sciences | Wang R.,CAS Research Center for Eco Environmental Sciences | An Q.,Hefei University of Technology | Yao L.,CAS Research Center for Eco Environmental Sciences | Liang J.,Hunan Environmental Monitoring Center
Ecological Indicators | Year: 2014

Urbanisation in China has resulted in an increased consumption of resources, energy and materials and led to negative environmental effects. All of these factors have motivated the widely discussed topic of urban sustainable development in China. The core of this discussion is how to quantitatively measure urban sustainable development. This research uses eco-efficiency as an indicator to measure urban sustainable development. A data envelopment analysis model was applied to eco-efficiency analysis using environmental pollution as an undesirable output, and a super-efficiency model was modified for ranking. Using real datum for 30 Chinese provincial capital cities, an empirical study was employed to describe their eco-efficiency. The results show that: almost half of the cities are fairly eco-efficient. The inefficient cities are mainly located in the southwest and northwest of China, which are the undeveloped economic zones, while some of the eco-efficient cities have more environmental pollution and consume more land, energy and water. When ranking cities using a modified model, it was found that Haikou, Fuzhou and Beijing were the top three most eco-efficient cities, while Yinchuan, Lanzhou, Guiyang were the bottom three. When exploring the driving force of eco-efficiency, this paper proposes changing the GDP-oriented growth model and appraisal system, continuously transforming and upgrading the industrial structure and stopping the migration of heavy industry from east to west, south to north and city to countryside. © 2013 Elsevier Ltd. All rights reserved.

Yin K.,CAS Research Center for Eco Environmental Sciences | Wang R.S.,CAS Research Center for Eco Environmental Sciences | Yao L.,CAS Research Center for Eco Environmental Sciences | Liang J.,Hunan Environmental Monitoring Center
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2014

The process of Chinese urbanization and industrialization is accelerating rapidly with the reform and open to the outside world policy, which resulted in a huge consumption of the land. But the disorder and inefficient land development policy now has brought about negative effects, which being a menace to the sustainable development of the country, threaten the ecological security, food security and social stability. The above things are mainly about our current land management model. Since the founding of the people's Republic of China, the urban land management agencies and their functions are changing constantly under the planned economy which leaded to a single administrative leadership land management model. Recently, some scholars, experts and officials presented that: our land management model should be changed from resource management to assets management. Some researchers pointed out that the three main methods of American city land management should be adopted: administrative districts, the market mechanism and planning and the city land reserve andtransfer system. The traditional land management systems focus on the quantity of the land, but the function being neglected, what's more, administrative intervention too much and lack of market mechanism which leaded to the divorce between land management and economic, ecological. Which resulted in some problems in our land management, like weighs quantity lights quality, weighs structure lights functions, weighs results lights processes, weights physical form lights ecological, weights interception lights regulation. The ecological essence of above things lead to landscape fragmentation, soil compaction, pollution retention, ecological depletion, short sighted behavior and poor information. The crux of the land management problem is the unbalance between the needs of society-economy and the ecological carrying capacity of the regional area; the paradox between the natural ecological footprint and the ecological services of green space; the uncoordinated management relationship between urban and suburban areas, agriculture and industry, the built up area and non-built up area. And, the development behavior is mainly mass investment from external mandatory and the dominant enlarge model is export-oriented land development, which lead to the weakness of internal self-organization and regulating function. According to these problems mentioned above, the article proposed a conjugate ecological management model for urban land administration based on the land complex ecological function, which divided the land function into four categories: biomass production function, support for land construction, provide security for farmer subsistence and the other functions (like water conservation, soil conservation, climatic regulation and so on). Then three ways of mechanism transformation were put forward: the land management systems should altered from single-attribute and simple target to multi-attribute and multi-target; changing into market mechanism from administrative management; giving priority to the regulation and management system based upon land ecological function. Then, we concluded that the conjugate ecological management model should comprise the following five aspects: 1) changing from the resource management of the land plane structure to the ecological management of the land stereo space; 2) keeping requisition-compensation balance within the development area according to the ecological function, but not in terms of land area which in different locations; 3) the land development should in accordance with the structure and function optimization followed a sugar-coated berry string type, but not expands like standing pancake. 4) altering from the most strict land quantity management to the most reasonable land function management, and taking the land ecological-economic function monitoring and audit into practice. Finally, a typical ecological engineering was being analyzed, which proved that the social, economic and environmental complex ecological effects were more than the traditional land use model.

PubMed | Hunan Environmental Monitoring Center
Type: Journal Article | Journal: Se pu = Chinese journal of chromatography | Year: 2010

Supramolecular chemistry is a new branch of sciences, which deals with the specific recognitions between molecules. The host-guest interactions, which exert by supramolecular compounds, can provide a promising prospect for chromatographic separations with high selectivities. Capillary electrochromatography (CEC) is defined as a very promising micro-separation technique with high efficiency and high selectivity in recent years. As the key component of CEC, the stationary phases have been the research focus of CEC development. This paper reviews the recent progress in supramolecular compounds-based stationary phases (cyclodextrin, calixarene, crown ether and macrocyclic polyamine) for CEC since 1998.

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