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Orthogonal design for optimization of pigment extraction from surface sediments of the Changjiang River Estuary

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Acta Oceanologica Sinica 2011年第4期30卷 33-42页

作者： ZHAO Jun YAO Peng YU Zhigang Thomas S Bianchi Key Laboratory of Marine environment and Ecology Ministry of Education Ocean University of China Qingdao 266100 China Department of Oceanography Texas A ＆ M University College Station TX 77843 USA Key Laboratory of Marine Chemistry Theory and technology Ministry of Education Ocean University of China Qingdao 266100 China Institute of Marine Organic Geochemistry College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266100 China

Using a suitable solvent for extracting pigments from sediment for high performance liquid chromatography（HPLC） analysis is critical for obtaining qualitative and quantitative estimates of phytoplanktonic and benthic algal biomass,as well as community composition. Five methodological factors（sample dehydration,extraction solvent,extraction duration,number of extractions,and ratio of solvent volume：sample weight） were studied using an L 9（3 4 ） orthogonal design in a sedimentary pigment extraction experiment on samples collected from the Changjiang large-river delta-front estuary（LDE）,using HPLC analysis. The results show that the optimal extraction method for sedimentary pigments should include freeze-drying samples prior to extraction. The effects of different factors on sedimentary pigment extraction were separated by the L 9（3 4 ） orthogonal design experiments and showed that the extraction solvent was the most important,with extraction duration the second most important,and numbers of extraction and ratio of solvent volume：sample weight was the least important. The mixed solvent treatment comprised of acetone,methanol and water（80：15：5,by volume） was best for polar pigment extraction,with 100% acetone better for apolar pigments. For most pigments employed in this study（i.e.,peridinin,fucoxanthin,alloxanthin,diatoxanthin,zeaxanthin,pheophytin-a and β-carotene） ,3 h was found to be enough time for extraction from these deltaic sediments. However,for chlorophyll-a,the most important pigment used for estimating algal biomass,12 h was needed. A small amount of solvent（3 ml） with duplicate extractions obtained the greatest amount and diversity of pigments. Unfortunately,no extraction method was found to be suitable for all pigments in sediments. The choice of extraction procedure should be made in accordance with the objective of each study,taking into consideration the properties of sediments and pigments in question.

关键词： sedimentary pigments extraction orthogonal design HPLC Changjiang River Estuary

Effects of magnetic field on fluidization properties of magnetic pearls

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Particuology 2007年第Z1期 151-155页

作者： Maoming Fana,b, Zhenfu Luob, Yuemin Zhaob, Qingru Chenb, Daniel Taoa, Xiuxiang Taob, Zhenqiang Chenb a Department of mining engineering, university of Kentucky, 230 mining and Mineral Resources Building, Lexington, KY 40506, USA b school of chemical engineering and technology, china university of mining and technology, Xuzhou 221008, Jiangsu, china

An experimental study of the influence of external magnetic field on the fluidization behavior of magnetic pearls was carried out. Magnetic pearls are a magnetic form of iron oxide that mainly consists of Fe2O3 which are recovered from a high-volume power plant fly ash from pulverized coal combustion. Due to its abundance, low price and particular physical and chemical properties, magnetic pearls can be used as a heavy medium for minerals or solid waste dry separation based on density difference. This paper introduces the properties of magnetic pearls and compares the performance of magnetic pearls fluidised bed operation with or without an external magnetic field. Experimental results show that an external magnetic field significantly improves the fluidization performance of magnetic pearls such as uniformity and stability.

关键词： Magnetic pearls Magnetic field Fluidization properties Gravity separation

Study on Low-Temperatrure Modification of Printed Circuit Board

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Study on Low-Temperatrure Modification of Printed Circuit Bo...

水煤浆添加剂与煤之间的相互作用规律研究 Ⅰ.复合煤颗粒间的相互作用对水煤浆流变性的影响

2007中国科协年会

作者： Zhou Cuihong~1 Chen Maohe~2 Qiao Xuefeng~1 1.Department of environmental engineering,beijing Institute of Pectrochemical technology,beijing 102617,china 2.Shcool of chemical and environmental engineering,china university of mining and technology,beijing 100083.china

Introduced the components and mechanics intensity of Printed Circuit Board (PCB) at room temperature. Emphases have been placed on study the low-temperature modification of *** found that impact strength tends to decrease with cooling temperature and drops to a lowest value at-30℃.As for the bending strength,it tends generally to firstly decrease and then increase,and at-30℃ bending strength and failure strength all fall down to a minimum value and then rise up again *** production capacity and power consumption of different cooling *** results show that crush PCB at low temperature can increase production capacity and decrease power consumption in a certain *** cryogenic grinding the average power consumption is lower between -30℃ to-60℃ and the average power is decrease in evidence at-30℃,freezing time for 10 minutes is *** offers the theoretical foandation for the design of the crushing flow and choose device in the recycling of PCB.

关键词： Printed Circuit Board(PCB) low-temperature modification grinding power consumption

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燃料化学学报 2003年第6期31卷 519-524页

作者：朱书全邹立壮黄波崔广文王奇中国矿业大(北京)化学与环境工程学院北京100083

使用12种不同分散剂对14种不同变质程度的煤进行了成浆性实验,分析了182个水煤浆(CWS)样品的流变性。结果表明,低变质程度和高灰煤浆多呈屈服假塑性,煤的性质起主导作用;变质程度高且灰分较低煤浆的流变性,主要依赖于分散剂的结构与性质... 详细信息

使用12种不同分散剂对14种不同变质程度的煤进行了成浆性实验,分析了182个水煤浆(CWS)样品的流变性。结果表明,低变质程度和高灰煤浆多呈屈服假塑性,煤的性质起主导作用;变质程度高且灰分较低煤浆的流变性,主要依赖于分散剂的结构与性质;分子结构单元立体空间效应大,疏水基团与亲水基团呈立体间隔分布的分散剂,易形成屈服假塑性CWS;分子线度长,亲水基团与疏水基团呈线性间隔分布的分散剂,易形成胀塑性CWS。复合煤粒间的相互作用方式是决定CWS流变特性的关键。

关键词：水煤浆添加剂煤分散剂流变特性复合煤粒相互作用

Element geochemistry and cleaning potential of the No. 11 coal seam from Antaibao mining district

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Science china Earth Sciences 2005年第12期48卷 2142-2154页

作者： WANG Wenfeng1, QIN Yong1, SONG Dangyu2, SANG Shuxun1, JIANG Bo1, ZHU Yanming1 & FU Xuehai1 1. College of Resources & Geosciences, china university of mining and technology, Xuzhou 221008, china 2. State Key Laboratory of Coal Combustion, Huazhong university of Science and technology, Wuhan 430074, china 1. College of Resources & Geosciences China University of Mining and Technology 221008 Xuzhou China 2. State Key Laboratory of Coal Combustion Huazhong University of Science and Technology 430074 Wuhan China

Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No. 11 coal seam from Antaibao surface mine, Shanxi, china and 4 samples from the coal preparation plant of this mine, the distribution of the elements in the seam profile, their geo-chemical partitioning behavior during the coal cleaning and the genetic relationships between the both are studied. The conclusions are drawn as follows. The coal-forming environment was probably invaded by sea water during the post-stage of peatification, which results in the fact that the contents of As, Fe, S, etc. associated closely with sea water tend to increase toward the top of the seam, and that the kaolinite changes into illite and montmorillonite in the coal-sublayer near the roof. These elements studied are dominantly associated with kaolinite, pyrite, illite, montmorillonite, etc., of which the As, Pb, Mn, Cs, Co, Ni, etc. are mainly associated with sulfides, the Mo, V, Nb, Hf, REEs, Ta etc. mainly with kaolintie, the Mg, Al etc. mainly with epigenetic montmorillonite, and the Rb, Cr, Ba, Cu, K, Hg, etc. mainly with epigenetic illite. The physical coal cleaning is not only effective in the removal of ash and sulfur, but also in reducing the concentra-tion of most major and trace elements. The elements Be, U, Sb, W, Br, Se, P, etc. are largely or partly organically bound showing a relatively low removability, while the removability of the other elements studied is more than 20%, of which the Mg, Mn, Hg, Fe, As, K, Al, Cs, and Cr associ-ated mostly with the coarser or epigenetic minerals show a higher removability than that of ash. The distribution of the elements in the seam profile controls their partitioning behavior to a great degree during the coal cleaning processes.

关键词： Antaibao mining district, No.11 coal seam, element geochemistry, cleaning.

ADSORPTION OF LATERALLY INTERACTING 1-NAPHTHOL/1-NAPHTHYL-AMINE MIXTURES ON NONPOLAR SURFACES FROM AQUEOUS SOLUTIONS

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Chinese Journal of Polymer Science 2006年第1期24卷 73-80页

作者： Wei-ming Zhang Jin-long Chen Qun Chen Ming-yang He Bing-cai Pan and Quan-xing Zhang a State Key Laboratory of Pollution Control and Resources Reuse,school of the environment,Nanjing university,Nanjing 210093,china b Research Center for engineering technology of Organic Poison Control and Resources Reuse in Jiangsu Province,Nanjing 210038,china c Department of chemical engineering,Jiangsu Polytechnic,Changzhou 213016,china Nanjing Univ Sch Environm State Key Lab Pollut Control & Resources Reuse Nanjing 210093 Peoples R China Res Ctr Engn Technol Organ Poison Control & Resou Nanjing 210038 Peoples R China Jiangsu Polytech Dept Chem Engn Changzhou 213016 Peoples R China

The binary adsorption behavior of 1-naphthol/1-naphthylamine mixtures in water on nonpolar adsorbent Amberlite XAD4 was investigated at 293 K, 303 K and 313 K, respectively. The experimental uptakes of 1-naphthol and 1-naphthylamine in all binary-component systems of different molar ratios were obviously higher than the corresponding uptakes predicted by the extended Langmuir model, assuming no interaction between the adsorbed molecules of the two components. This phenomenon was attributed to the cooperative adsorption effect arising from the hydrogen bonding interaction between 1-naphthol and 1-naphthylamine molecules. A modified extended Langmuir model was proposed to describe the binary adsorption behavior by means of introducing a fitting parameter related with the cooperative adsorption effect of the adsorbates.

关键词： Modified model 1-Naphthol 1-Naphthylamine Adsorbate-adsorbate interaction Cooperative effect.

Photocatalytic energy storage ability of TiO_2-WO_3 composite prepared by wet-chemical technique

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Journal of environmental Sciences 2010年第3期22卷 454-459页

作者： Linglin Cao, Jian Yuan, Mingxia Chen, Wenfeng Shangguan Research Center for Combustion and environment technology, Shanghai Jiao Tong university, Shanghai 200240, china. [a] Research Center for Combustion environment technology Shanghai Jiao Tong University Shanghai 200240 China

TiO2-WO3 hybrid photocatalysts were prepared using wet-chemical technique, and their energy storage performance was characterized by electrochemical galvanostatic method. TiO2 powder was coupled with WO3 powder, which was used as electron pool and the reductive energy could be stored in. As a result, the prepared TiO2-WO3 had good energy storage ability while pure TiO2 showed no capacity and pure WO3 showed quite low performance. The energy storage ability was affected by the crystal structure of WO3 and calcination temperature. The photocatalyst had better capacity when WO3 had low degree of crystallinity, since its loose structure made it easier for electrons and cations to pass through. The photocatalytic energy storage performance was also affected by the molar ratio of TiO2 to WO3. Energy storage capacity was significantly dependent on the composition, reaching the maximum value at TiO2/WO3 1：1 （mol/mol）.

关键词： photocatalyst TiO2-WO3 energy storage

Study on the Waste Recycling and Reuse Patterns in Coal Mines

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Study on the Waste Recycling and Reuse Patterns in Coal Mine...

Screening and Denitrification Characteristics of a Slight Halophilic Heterotrophic Nitrobacteria

2010 2nd IEEE International Conference on Advanced Management Science（IEEE ICAMS 2010）

作者： Zhenling Liu school of Management Henan university of technology Zhengzhou china Zhengquan Guo school of Management china university of mining & technology(beijing) beijing china Gang Li Department of Resources and environmental engineering Henan Institute of engineering Zhengzhou china Wenbo Tan school of Management china university of mining & technology (beijing) beijing china

Since 2006,china has become the largest coal production and consumption country in the ***,the coal mining waste has become the greatest threaten to the environment and *** to the recycling economy thought,many coal mining waste can be reused and recycled that can produce great benefits for enterprises and *** this paper,the recycling economy thought is introduced for its ***,based on the thought,the reuse and recycles of the coal mining waste practice are assigned according to the waste *** research result indicated that the recycling economy is the best chose for the economy and society sustainable development.

关键词： coal mining waste,recycling economy,industrial chains material flow

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Wuhan university Journal of Natural Sciences 2010年第4期15卷 363-368页

作者： GUO Shasha, ZHANG Peiyu, YU Deshuang, QU Yang College of Chemistry, chemical engineering and environment, Qingdao university, Qingdao 266071, Shandong, china College of Chemistry Chemical Engineering and Environment Qingdao University Qingdao Shandong China

A slight halophilic heterotrophic nitrobacteria named gs1 was separated from the matured activated sludge. According to the morphological observation,physiological biochemical tests and sequence analysis of the 16S rDNA,strain gs1 was identified to be as Pseudomonas sp. Sodium acetate and ammonium chloride were used as carbon and nitrogen sources,respectively,to investi-gate the characteristics of the bacterium. When cultured for 24 h under aerobic conditions,with the removal rates of the NH4+-N and COD being 82.2% and 74.73%,respectively,strain gs1 will have a nitrification function of producing NO2--N. When cultured for 24 h under aerobic conditions in nitrite medium,the removal rate of the NO2--N became 100%,and when cultured for 24 h under aerobic conditions in nitrate medium,the removal rate of the NO3--N became 97%. The result shows that this strain functions for either nitrification or denitrification,i.e.,it can complete the full process of biological deoxidation.

关键词： halophilic heterotrophic nitrobacteria aerobic deni- trification 16S rDNA sequence analysis