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Ni supported on activated carbon as catalyst for flue gas desulfurization

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science china Chemistry 2010年第4期53卷 846-850页

作者： CHU YingHao1,2, GUO JiaXiu1,2, LIANG Juan1,2, ZHANG QiangBo1 & YIN HuaQiang1,2 1Department of environmental science and Engineering, Sichuan University, Chengdu 610065, china 2National Engineering technology research center for Flue Gas Desulfurization, Sichuan University, Chengdu 610065, china 1. Department of environmental science and Engineering Sichuan University Chengdu 610065 China2. National Engineering Technology Research Center for Flue Gas Desulfurization Sichuan University Chengdu 610065 China

A series of Ni supported on activated carbon are prepared by excessive impregnation and the desulfurization activity is investigated. It has been shown that the activated carbon-supported Ni is an efficient solid catalyst for flue gas desulfurization. The activated carbon treated by HNO3 exhibits high desulfurization activity, and different amounts of loaded-Ni on activated carbon significantly influence the desulfurization activity. The catalysts are studied by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results of XRD and XPS indicate that the activated carbon treated by HNO3 can increase oxygen-containing functional groups. Ni on activated carbon after calcination at 800 °C shows major Ni phase and minor NiO phase, and with increasing Ni content on activated carbon, Ni phase increases and affects the desulfurization activity of the catalyst, which proves that Ni is the main active phase.

关键词： activated carbon Ni desulfurization XRD XPS

Assessment of the potential storm tide inundation hazard under climate change:case studies of Southeast china coast

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Acta Mechanica Sinica 2021年第1期37卷 53-64,I0002页

作者： Bingchuan Nie Qingyong wuxi Jiachun Li Feng Xu School of Civil Engineering Beijing Jiaotong UniversityBeijing100044China Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment Beijing100044China Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering science University of Chinese Academy of SciencesBeijing100049China

Four typical cases of storm tide inundation at one of the typical storm surge prone areas in china and worldwide,*** china coast,are presented to demostrate the impact of climate *** is relied on the statistical trend analysis of tropical cyclone intensification(TCI)and sea level rise(SLR)considering temporally non-stationary and spatially non-uniform effects,numerical analysis taking into account the tide-surge-wave coupling effect and GIS-based analysis for inundation *** results show that the high sea surface elevation tends to occur in the bays and around the *** maximal sea surface elevations of the worst situation at present without considering TCI and SLR(*** S2)are 6.06 m,5.82 m and 5.67 m around Aojiang,Feiyunjiang and Oujiang river estuaries,***,the maximal sea surface elevations for the three estuaries would increase to 7.02 m,6.67 m and 6.44 m,respectively,when the non-stationary extreme wind speed of 100-year recurrence period and SLR equivalent to the situation of 2100s(*** S4)are taking into *** potential inundation area of scenario S4 would expand by 108%to about 798 km^(2) compared with scenario *** addition,the remotely sensed maps and inundation durations of the hardest hit regions are provided,which will aid the prevention and mitigation of storm tide inundation hazard and future coastal management there.

关键词： Storm surge Inundation Risk assessment Tropical cyclone intensification Sea level rise

FORMATION AND EROSION PROCESSES OF THE LOESS PLATEAU

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International Journal of Sediment research 1999年第2期14卷 345-352页

作者： YUAN Baoyin LU Zhongchen and DENG Chenglong (The study is Supported by NNSFC Institute of Geology, Chinese Academy of science, china research center for Eco-environmental science, Chinese Academy of science,china)

The uplift of the Tibet Plateau resulted in large-scale Gobi and deserts in Northwest china,in which the fine particles finer than 0.1 mm were transported to and deposited in the region of the Loess Plateau by wind, and then formed the loess of a great thickness. The body of loess deposition can be viewed as a giant lenticular structure named "Loess mantle". According to the process of loess deposition, it can be divided into four subregions: the transitional zone, the stable zone, the marginal zone and the long-range zone of loess deposition. Primarily the long-term climatic changes caused the gully erosion in the stable zone. This paper aims to re-establish the stops of the gully development using the geological records of the gully system on the Loess Plateau and to establish the mathematical model of soil erosion. With this mathematical model the natural erosion module has been calculated as 10 250 t/km2.a for the Ausal area of Shaanxi Province. However, the actual erosion module is 15,000 t/km2.a because about 31 .6% of the total erosion is created by human activities.

关键词： Loess plateau. Erosion Mathematic model Gully development

Heavy metals in surface sediments from Minjiang Estuary-Mazu and Xiamen-Jinmen sea areas

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Journal of environmental sciences 2003年第1期15卷 116-122页

作者： HONG Li\|yu\+*, HONG Hua\|sheng, CHEN Wei\|qi, WANG Xin\|hong, ZHANG Luo\|ping (Key Laboratory for Marine environmental science of Ministry of Education/environmental science research center, Xiamen University, Xiamen 361005, china. Enviromental science Reserach center Xiamen University Key Laboratory for Marine Environmental Science of Ministry of Education Xiamen 361005

The concentrations of Cu, Pb, Zn and Cd in surface sediments from Minjiang Estuary\|Mazu and Xiamen\|Jinmen sea areas of china were investigated during 1995—1996. The concentration ranges of Cu, Pb, Zn and Cd in the Minjiang Estuary\|Mazu sea area were 16.4\ 37.2, 33.4\69.6, 92.1\128, 0.087\0.336 mg/kg（dry wt.）, respectively; those for Xiamen\|Jinmen sea area were 11.0\24.5, 36.0\80.3, 77.5\161, 0.135\0.285 mg/kg（dry wt.）, respectively. The concentrations and distributions of Cu, Pb, Zn and Cd in surface sediments of Minjiang Estuary\|Mazu and Xiamen\|Jinmen sea areas were analyzed and evaluated. The results showed that the values of Zn and Pb exceeded those of sediment quality criteria. The average concentration of Cu in Minjiang Estuary\|Mazu sea area was higher than that in Xiamen\|Jinmen sea area. The obviously higher concentrations of Cu, Pb, Zn and Cd were found at outlets of Minjiang and Jiulong River. From the estuaries to open sea, the concentrations of Cu, Pb, Zn and Cd had a decreasing trend, and then elevated in the sea areas near Mazu and Jinmen, suggesting that Cu, Pb, Zn and Cd in Minjiang Estuary\|Mazu and Xiamen\|Jinmen sea areas may come from both the mainland and Taiwan of china.

关键词： heavy metal sediment concentration distribution Minjiang Estuary\|Mazu and Xiamen\|Jinmen sea areas

Multi-Innovation Generalized Extended Stochastic Gradient Algorithm for Multi-Input Multi-Output Nonlinear Box-Jenkins Systems Based on The Auxiliary Model

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Multi-Innovation Generalized Extended Stochastic Gradient Al...

Construction of WCB-11:A novel phiYFP arsenic-resistant whole-cell biosensor

2010 International Conference on Life System Modeling and Simulation & 2010 International Conference on Intelligent Computing for Sustainable Energy and Environment

作者： Jing Chen1 and Xiuping Wang2 1 Control science and Engineering research center, Jiangnan University, wuxi, PR china 2141222.wuxi Professional College of science and technology, wuxi, PR china 214028

An auxiliary model based multi-innovation generalized extended stochastic gradient algorithm is developed for multivariable nonlinear Box-Jenkins systems. The basic idea is to construct an auxiliary model using the measured data and to replace the unknown terms in the information vector with their estimates, i.e., the outputs of the auxiliary model. The proposed algorithm can give high accurate parameter estimation compared with existing stochastic gradient algorithms. A simulation example is given.

关键词： Stochastic gradient, Multi-input multi-output systems, Multiinnovation identification, Box-Jenkins systems, Recursive identification

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Journal of environmental sciences 2010年第9期22卷 1469-1474页

作者： Qing Hu ,Li Li,Yanjuan Wang,Wenjuan Zhao,Hongyan Qi,Guoqiang Zhuang Department of environmental Bio-technology,research center for Eco-environmental sciences,Chinese Academy of sciences,Beijing 100085,china. [a] Department of environmental Bio-technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The prediction and assessment of environmental pollution by arsenic are important preconditions of advocating environmental protection and human health risk assessment. A yellow fluorescent protein-based whole-cell biosensor for the detection of arsenite and arsenate was constructed and tested. An arsenic-resistant promoter and the regulatory gene arsR were obtained by PCR from the genome ofEscherichia coli DH5ct, andphiYFP was introduced into E. coli DH5ct as a reporter gene to construct an arsenic-resistant whole-cell biosensor （WCB-11） in which phiYFP was expressed well for the first time. Experimental results demonstrated that the biosensor has a good response to arsenic and the expression ofphiYFP. When strain WCB-11 was exposed to As^3＋ and As^5＋, the expression of yellow fluorescence was time-dependent and dose-dependent. This engineered construct is expected to become established as an inexpensive and convenient method for the detection of arsenic in the field.

关键词： arsenic reporter gene whole-cell biosensor yellow fluorescent protein (phiYFP)

Effects of elevated CO_2 on growth and carbon partitioning in rice

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Chinese science Bulletin 1998年第23期43卷 1982-1986页

作者： LIN Weihong\+1 and WANG Dali\+2 1. Department of Plant Nutrition, china Agricultural University, Beijing 100094, china 2. Department of Systems Ecology, research center for Eco_environmental science, Chinese Academy of sciences, Beijing 100085, china Department of Plant Nutrition China Agricultural University Beijing China Department of Systems Ecology Research Center for Eco-Environmental Science Chinese Academy of Sciences Beijing China

Rice (\%Oryza sativa\% cv. Jindao 1187) was grown in open_top chambers which contained ambient and enriched CO\-2. CO\-2 elevation stimulated rice tillering during early vegetative stage. However, panicle dry weight per plant did not change at maturity stage. Root biomass was enhanced by high CO\-2. Root / shoot ratio was increased under high CO\-2 at maturity, indicating more carbon allocation to the below_bround part in rice under high CO\-2.

关键词： CO 2 elevation growth carbon partitioning rice (\%Oryza sativa cv\%. Jindao 1187).

Virus rejection with two model human enteric viruses in membrane bioreactor system

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science china Chemistry 2007年第3期50卷 397-404页

作者： ZHENG Xiang1,2 & LIU JunXin1 1 research center for Eco-environmental sciences, Chinese Academy of sciences, Beijing 100085, china 2 School of Environment & Natural Resources, Renmin University of china, Beijing 100872, china 1. research center for Eco-environmental sciences Chinese Academy of Sciences Beijing 100085 China 2. School of Environment & Natural Resources Renmin University of China Beijing 100872 China

A membrane bioreactor (MBR) with gravity drain was tested for virus rejection with two coliphages, T4 and f2, which were used as surrogates for human enteric viruses. Virus rejection was investigated by PVDF and PP membrane modules, with the pore sizes of 0.22 and 0.1 μm, respectively. In tap water system, 2.1 lg rejection of coliphage T4 could be achieved by PVDF membrane compared with complete rejection by PP membrane, while for coliphage f2 with smaller diameter, 0.3―0.5 lg rejection of the influent virus was removed by the two membranes. In domestic wastewater system, cake layer and gel layer on the membrane surface changed the cut-off size of the membrane so that there was no significant difference between PP and PVDF for each coliphage. The removal ratios of coliphage T4 and f2 in the MBR were more than 5.5 and 3.0 lg, respectively. Compared with 5.5 lg removal for virus T4 in the MBR system, only 2.1 lg (96.8%―99.9%) removal rate was observed in the conventional activated sludge system with the influent virus concentration fluctuating from 1830 to 57000 PFU/mL. Only 0.8%―22% virus removal was the effect of adsorption to activated sludge, which showed a decreasing tendency with the retention time, while 75%―98% was the effect of virus inactivation by microbial activity. It indicated that the major mechanism of virus removal was not the transfer of viruses from the water phase to the sludge phase but inactivation in the biological treatment process.

关键词： MBR model virus enteric virus inactivation

New Institutional Mechanism in china Facilitating the Global Sustainability——Environment to Be Counted in Officials' Performance Rating

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Chinese Journal of Population,Resources and Environment 2004年第4期2卷 49-52页

作者： Ren Jingming Wang Rusong research center for Eco-environmental science, Chinese Academy of science, Beijing 100085, china Development research center of Chinese Geological Survey, Beijing 100037, china research center for Eco-environmental science Chinese Academy of Science Beijing 100085 China Development research center of Chinese Geological Survey Beijing 100037 China

Having argued the importance of china's sustainable development in global sustainability, the authors review the achievements of china in sustainable development, especially its institutional construction. Environment to be counted in official's political performance rating system is thought of as a new institutional mechanism in china facilitating its sustainable development and then global sustainability. Then its significance is narrated and visions in future are envisioned. In the end, certain concrete suggestions for the rating system are given in a practical way.

关键词： official’s performance rating System institutional mechanism china’s sustainable development global sustainability