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Formation of Struvite Crystals in a Simulated Food Waste Aerobic Composting Process

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Chemical Research in Chinese Universities 2010年第2期26卷 210-216页

作者： DU Xian-yuan LIU Jian-lin huang guo-he LI YU Energy and Environmental Research Centre North China Electric Power University Beo＇ing 102206 P. R. China College of Environment and Resources Jilin University Changchun 130012 P. R. China Environmental Systems Engineering Program Faculty of Engineering University of Regina Regina SK S4S OA2 Canada

Bench-scale treatments with three mixtures of Mg and P salts, including K3PO4＋MgSO4, K2HPO4＋MgSO4, and KH2PO4＋MgSO4 as additives in a simulated food waste aerobic composting process, were conducted to test the magnesium ammonium phosphate（MAP） formation, and the compost products were analyzed by X-ray diffraction（XRD）, Scanning electron microscopy（SEM）, and Energy dispersive X-ray spectroscopy（EDS） analyses. The comparison results between XRD, SEM, and EDS analyses of MAPs in the dried compost and synthesized MAPs confirm the formation of MAP crystals in the simulated food waste aerobic composting process. The analysis of the compost also indicates that the addition of all the three mixtures of Mg and P salts in the aerobic composting process can increase nitrogen conservation and decrease nitrogen loss because of the formation of MAPs. The mechanism of MAP formation was verified as the reaction of ammonium（NH4＋） with magnesium（Mg^2＋） and phosphate[HnPO4^（3-n） , n=0, 1, and 2）.

关键词： Phosphate Magnesium sulphate Magnesium ammonium phosphate Food waste treatment Aerobic composting

A novel biosorbent: characterization of the spent mushroom compost and its application for removal of heavy metals

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Journal of Environmental Sciences 2005年第5期17卷 756-760页

作者： CheN Gui-qiu ZENG Guang-ming TU Xiang huang guo-he CheN Yao-ning Department of Environmental Science and Engineering Hunan University Changsha 410082 China

The spent mushroom compost of Lentinus edodes was used as a biosorbent for adsorbing cadmium, lead and chromium from solutions under batch conditions for the first time. Titration of the biomass revealed that it contained at least three types of functional groups. The Fourier transform infrared spectrometry showed that the carboxyl, phosphoryl, phenolic groups were the main groups. The simulated values of pK, and molar quantity were 5.00 and 0.44 mmol/g, 7.32 and 1.38 mmol/g, 10.45 and 1.44 mmol/g, respectively. The biosorption ability increased with pH in acid condition. When 10 mg/L biomass dosage was added in, there was no significant increment of metal uptake. The maximum uptake estimated with the Langmiur isotherm model were 833.33 mg/g for Cd（ Ⅱ ）, 1000.00 mg/g for Pb（ Ⅱ ） and 44.44 mg/g for Cr（ Ⅲ ）, respectively. All the results showed that vast potential sorption capacity was existed in the biomass for adsorbing these three kinds of metals studied.

关键词： spent mushroom compost characterization biosorptlon heavy metals

Application of Bayesian regularized BP neural network model for analysis of aquatic ecological data—A case study of chlorophyll-a prediction in Nanzui water area of Dongting Lake

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Journal of Environmental Sciences 2005年第6期17卷 946-952页

作者： XU Min ZENG Guang-ming XU Xin-yi huang guo-he SUN Wei JIANG Xiao-yun College of Environmental Science and Engineering Hunan University Changsha 410082 China Sino-Canadian Center of Energy and Environment Research University of Regina Regina SK S4S 0A2 Canada

Bayesian regularized BP neural network（BRBPNN） technique was applied in the chlorophyll-α prediction of Nanzui water area in Dongting Lake. Through BP network interpolation method, the input and output samples of the network were obtained. After the selection of input variables using stepwise/multiple linear regression method in SPSS i1.0 software, the BRBPNN model was established between chlorophyll-α and environmental parameters, biological parameters. The achieved optimal network structure was 3-11-1 with the correlation coefficients and the mean square errors for the training set and the test set as 0.999 and 0.000？8426, 0.981 and 0.0216 respectively. The sum of square weights between each input neuron and the hidden layer of optimal BRBPNN models of different structures indicated that the effect of individual input parameter on chlorophyll- α declined in the order of alga amount 〉 secchi disc depth（SD）〉 electrical conductivity （EC）. Additionally, it also demonstrated that the contributions of these three factors were the maximal for the change of chlorophyll-α concentration, total phosphorus（TP） and total nitrogen（TN） were the minimal. All the results showed that BRBPNN model was capable of automated regularization parameter selection and thus it may ensure the excellent generation ability and robustness. Thus, this study laid the foundation for the application of BRBPNN model in the analysis of aquatic ecological data（chlorophyll-α prediction） and the explanation about the effective eutrophication treatment measures for Nanzui water area in Dongting Lake.

关键词： Dongting Lake chlorophyll-a Bayesian regularized BP neural network model sum of square weights

Environmental input-output model and its analysis with a focus on the solid waste management sectors

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Journal of Environmental Sciences 2000年第2期12卷 53-58页

作者： Zeng, Guang-Ming Yuan, Xing-Zhong Zhang, Pan-Yue guo, Huai-Cheng huang, Gordon guo-he hemelaar, L. Environmental Protection Institute Hunan University Changsha 410082 China Environmental Science Center Peking University Beijing 100871 China Faculty of Engineering University of Regina Sask. S4S OA2 Canada Waste Nieuwehaven 201 2801 CW Netherlands

An environmental input output model (EIOM) was introduced to the regional solid waste management sectors, which can reflect the direct and indirect relations between the environment and the regional economy development. Some details about how to use the EIOM was discussed. The EIOM was applied to the Changsha City in China. The example results indicate that much useful information related to the environment and the regional economy development can be gained from the solution of the EIOM. Thus, the EIOM can be used as a useful tool for the sustainable development planning including the solid waste management sectors.

关键词： environmental input\|output model analysis of economy and environment solid waste management

LARGE MAGNETIC ENTROPY CHANGE IN La0.67-xGdxCa0.33MnO3

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南京大学学报(自然科学) 1998年第4期 124-126页

作者： huang he guo Zaibing Wang Dunhui Du Youwei

Ｒｅｃｅｎｔｌｙ，ｍｏｒｅａｎｄｍｏｒｅｐｅｏｐｌｅｆｏｃｕｓｔｈｅｉｒａｔｅｎｔｉｏｎｏｎｔｈｅｍａｇｎｅｔｉｃｒｅｆｒｉｇｅｒａｔｉｏｎｂｅｃａｕｓｅｉｔｈａｓｌｏｔｓｏｆａｄｖａｎｔａｇｅｓｏｖｅｒｔｈｅｇａｓ... 详细信息

Ｒｅｃｅｎｔｌｙ，ｍｏｒｅａｎｄｍｏｒｅｐｅｏｐｌｅｆｏｃｕｓｔｈｅｉｒａｔｅｎｔｉｏｎｏｎｔｈｅｍａｇｎｅｔｉｃｒｅｆｒｉｇｅｒａｔｉｏｎｂｅｃａｕｓｅｉｔｈａｓｌｏｔｓｏｆａｄｖａｎｔａｇｅｓｏｖｅｒｔｈｅｇａｓｒｅｆｒｉｇｅｒａｔｉｏｎ．Ｉｎｔ...

关键词： refrigeration magnetic entropy perovskite

Adenovirus-mediated expression of pig α(1,3) galactosyltransferase reconstructs Gal α(1,3) Gal epitope on the surface of human tumor cells

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Cell Research 2001年第2期11卷 116-124页

作者： XING LI, guo HONG XIA, JIAN FEI, FANG huang, LI he guo Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China 1Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China 1Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China 1Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China 1Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China 1Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China

Gal α(1, 3) Gal (gal epitope) is a carbohydrate epitope and synthesized in large amount by α(1, 3) galactosyltransferase [α(1, 3) GT] enzyme on the cells of lower mammalian animals such as pigs and mice. Human has no gal epitope due to the inactivation of α(1, 3) GT gene but produces a large amount of antibodies (anti-Gal) which recognize Gal α(1, 3) Gal structures specifically. In this study, a replication deficient recombinant adenoviral vector Ad5sGT containing pig α(1, 3) GT cDNA was constructed and characterized. Adenoviral vector-mediated transfer of pig α(1, 3) GT gene into human tumor cells such as malignant melanoma A375, stomach cancer SGC-7901, and lung cancer SPC-A-1 was reported for the first time. Results showed that Gal epitope did not increase the sensitivity of human tumor cells to human complement-mediated lysis, although human complement activation and the binding of human IgG and IgM natural antibodies to human tumor cells were enhanced significantly after Ad5sGT transduction. Appearance of gal epitope on the human tumor cells changed the expression of cell surface carbohydrates reacting with Ulex europaeus I (UEA I) lectins, Vicia villosa agglutinin (VVA), Arachis hypogaea agglutinin (PNA), and Glycine max agglutinin (SBA) to different degrees. In addition, no effect of gal epitope on the growth in vitro of human tumor cells was observed in MTT assay.

关键词： Adenoviral vector galactosyltransferase Gal α(1 3) Gal gene expression human tumor cell.

Application of numerical simulation on optimum design of two-dimensional sedimentation tanks in the wastewater treatment plant

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Journal of Environmental Sciences 2003年第3期15卷 346-350页

作者： ZENG Guang-ming,ZHANG Shuo-fu, QIN Xiao-sheng, huang guo-he, LI Jian-bing (Department of Environmental Science and Engineering of Hunan University, Changsha 410082, China.) Department of Environmental Science and Engineering of Hunan University Changsha 410082 Chin

The paper establishes the relationship between the settling efficiency and the sizes of the sedimentation tank through the process of numerical simulation, which is taken as one of the constraints to set up a simple optimum designing model of sedimentation tank. The feasibility and advantages of this model based on numerical calculation are verified through the application of practical case.

关键词： numerical simulation sedimentation tank optimum design

INTERVAL FINITE VOLUME METHOD FOR UNCERTAINTY SIMULATION OF TWO-DIMENSIONAL RIVER WATER QUALITY

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Journal of Hydrodynamics 2004年第4期16卷 455-463页

作者： heLi ZENGGuang-ming] huangguo-he LUHong-wei DepartmentofEnvironmentalSystemEngineering UniversityofReginaSaskatchewanS4S0A2Canada DepartmentofEnvironmentalScienceandEngineering HunanUniversityChangsha410082China

Under the interval uncertainties, by incorporating the discretization form offinite volume method and interval algebra theory, an Interval Finite Volume Method (IF-VM) wasdeveloped to solve water quality simulation issues for two-dimensional river when lacking effectivedata of flow velocity and flow quantity. The IFVM was practically applied to a segment of theXiangjiang River because the Project of Hunan Inland Waterway Multipurpose must be started workingafter the environmental impact assessment for it. The simulation results suggest that there existrather apparent pollution zones of BOD_5 downstream the Dongqiaogang discharger and that of CODdownstream Xiaoxiangjie discharger, but the pollution sources have no impact on the safety of thethree water plants located in this river segment. Although the developed IFVM is to be perfected, itis still a powerful tool under interval uncertainties for water environmental impact assessment,risk analysis, and water quality planning, etc. besides water quality simulation studied in thispaper.

关键词： interval finite volume method (IFVM) uncertainty simulation water quality

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企业社会责任、技术创新与企业价值

软科学 2017年第7期31卷 93-97页

作者：黄珺贺国亮湖南大学工商管理学院长沙410082

以2011~2013年沪深两市A股上市公司为样本,研究了企业社会责任通过技术创新对企业价值的作用机制,并进一步分析不同产权性质对这一作用机制的影响。结果表明:(1)企业社会责任能提升企业价值,技术创新在两者之间起到部分中介作用。(2)国... 详细信息

以2011~2013年沪深两市A股上市公司为样本,研究了企业社会责任通过技术创新对企业价值的作用机制,并进一步分析不同产权性质对这一作用机制的影响。结果表明:(1)企业社会责任能提升企业价值,技术创新在两者之间起到部分中介作用。(2)国有企业中,技术创新对企业社会责任与企业价值的关系呈现出消极的调节作用;非国有企业中,技术创新在企业社会责任与企业价值间起到完全中介作用。

关键词：企业社会责任企业价值技术创新产权性质