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Identification of environmental risks of enterprises processing and utilizing the imported scrap metals The enterprises processing and utilizing imported scrap metals face environmental risks mainly in the storage of raw materials and products, their transportation, processing and utilizing as well as pollution treatment.
The rainwater may corrode the surface of metals, producing metal ion and further polluting surface runoff when the metals are exposed to rain. 2) The plastic fragments left after disassembly are inflammable materials with poor thermostability.
Raw material hazard index is used to describe the environmental hazard that may arise from the raw materials of imported metal and electrical appliance scraps, scrap wires, cables and motors, the assessment of which will be made mainly based on the rate of dangerous wastes contained in the raw materials and the proportion of unrecyclable wastes.
The environmental pollution caused by the enterprises processing and utilizing scrap metals mainly include the sewage coming from the water-separated copper wire crusher, the dust from loading and unloading as well as processing and utilizing of raw materials, waste gas from pyrogenic decomposition and gas cutting and the unrecyclable and dangerous wastes contained therein.
HU, Y.ZHENG , Study on the management of designated companies processing and using the imported scrap metals, Chinese Journal of Environmental Management, 5(2013) 18-21

Baseline concentrations of trace metals in grassland topsoils from West Jilin province, Northeast China Qingwei Zhang1, Sheli Chai2,a, Jing Cai2 and Lina Gao2 1Faculty of Earth Sciences,Jilin University,Changchun 130061,China 2Faculty of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China achaisl@jlu.edu.cn Keywords: Baseline concentration,topsoils,trace metals,Multivariant analysis,West Jilin province Abstract: The objective of this study was to determine the baseline concentrations of trace elements in grassland topsoils from 155 soil sampling sites in West Jilin province, Northeast China, to establish the relationships between the trace metal contents and soil physicochemical properties and major oxide contents and among trace metal concentrations themselves, and to identify the possible sources of trace element in soils.
Material and Methods Site descriptions.
Reagent blanks, standard reference soil samples from the Center of National Standard Reference Material of China(GSS-1,GSS-10, GSS-11 and GSS-14) and internal control samples were also analyzed in order to monitor analytical accuracy and precision.The detection limits for trace elements (mg/kg) were: As 0.6,B 1,Cd 0.01,Co 0.7,Cr 3, Cu 1, Hg 0.005,Mn 4,Mo 0.1,Ni 2, Pb 2,Se 0.01and Zn 2.
The first association included As,Co,Cr,Cu, Mn,Mo,Ni,Zn,Al2O3 and Fe2O3,indicating the trace elements in this group were mainly associated with parent materials of soils such as Al oxides, Fe-Mn oxides and/or with the Al-bearing clay minerals, which implied that the trace elements were mainly derived from lithogenic and pedogenic processes and their concentrations in soils were mainly controlled by abundances of parent materials.
, J.Bech, and B.Sepulveda: Environmental Forensics, Vol.7 (2006),p.369 [12]M.Chen, L.Q.Ma, and G.H.Willie:Journal of Environment Quality,Vol.28(1999),p.1173 [13]A.Ikem, J.Campbell, I.Nyirakabibi, and J.Garth: Environ Monit Assess,Vol.140(2008), p.69 [14]S.Dudka, R.Ponce-Hernandez, and T.C.Hutchinson: Science of the Total Environment, Vol.162 (1995),p.161 [15]NEPA (National Environmental Protection Agency of China): Environmental quality standard for soils (GB 15618-1995).

Experimental Materials Graphite powder (NGP, 99.9%, 325 mesh), Zn(CH3COO)2·2H2O (99%), H2O2 (30%), sulfuric acid (H2SO4, 98%), chlorohydric acid (HCl, 36%), sodium hydroxide (NaOH) and 4-NP were purchased from Merck Company and all chemicals precursors were used as received without further purification.
However, for the ZnO nanorods with large aspect ratio, the lower direct contact of nanorods (compare to nanoparticles grown at pH of 10 to the underlying carbon sheets and the small contact area) reduces the transfer ability of photogenerated electrons to carbon materials.
We are recently shown that for the carbon materials incorporated semiconductors (eg.
Acknowledgment The authors would like to thank the Iran National Science Foundation for supporting the work.
Azimirad, Ultra-violet photodetection enhancement based on ZnO–graphene composites fabricated by sonochemical method, Journal of Sol-Gel Science and Technology 74 (2015) 499-506

Treatment Mechanisms and Operation Conditions of Arsenic Removal from Copper Smelting Effluent using Combined Process of Aeration Micro-electrolysis and Flocculation Yuqi Liu1,a, Yuebin Feng1,b, Xinying Wang1,c, Jing Wang2,d, Xiaojun Xu3,e, 1Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China 2 College of Architecture and Civil Engineering , Yunnan Agricultural University, Kunming 650201, China 3 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China) aemail:liuyuqi7547@163.com, bemail:fenjys @126.com, cemail:lwg3@163.com, demail:wj0045@163.com, eemail:xuxiaojun88@sina.com, Keywords: micro-electrolysis, flocculation, smelting effluent, arsenic removal efficiency, treatment mechanisms, operation conditions Abstract.
Materials and methods Materials.NaOH, SnCl2, KI, K2Cr2O7, (NH4) 2Fe (SO4) 2, 1,10 - phenanthroline, concentrated sulfuric acid, potassium hydrogen phthalate, diethyl dithiocarbamate silver, chloroform, triethylamine , glacial acetic acid, hydrochloric acid, nitric acid (both analytical grade).
More important, some refractory materials also could be deposited directly on the surface of copper.
Acknowledgements This work was supported by Analysis Testing Fund of Kunming University of Science and Technology(2009-111,2009-079) References [1] L.
Hu: Journal of Tianjin Polytechnic University Vol. 28(2009), p.62 [6] H.

This model base consists of ability damage assessment model, damage assessment model of damage control system, the calculation model of the afloat condition and stability, the calculation model of the maximum diameter of the breach that the crew can stem, the calculation mode of the flooding quantity of breach, the calculation model of the number of support column, the calculation model of drainage quantity, the calculation model of the maximum diameter of the breach that the crew can stem when all the drainage materials available are used, the calculation model of the area of water plane, the anti-flooding plan formation model, the selection model of the optimal anti-flooding plan and the optimal distribution model of the anti-flooding resource
The examples of this knowledge base are given as follows: : IF the diameter of the breach is smaller than the maximum diameter of the breach that the crew can stem AND the flood protection materials are not damaged THEN stem the breach and make use of all the drainage appliances available to drain seawater
The results of this example contain the cabins that can be used to balance the hull and increase the reserve buoyancy, the number of the support columns in every cabin needed to be supported, the optimal cabins that can be used to balance the hull and increase the reserve buoyancy, the anti-flooding materials needed, the anti-flooding crew needed, the recovery time needed, the probability of the success of recovery work. 6 Conclusions Based on the design of the frame work of intelligent decision support system in the damage control of damaged ship, the human-computer interaction subsystem, the database management subsystem, the model base management subsystem and the knowledge base management system of this system are introduced.
Journal of FuZhou University, 1997,25(2):65~69(in Chinese) [4] Chen jing-min.
J. of Systems Science and Systems Engineering,1994, 3(3):212-217

Influence of Surface Conditions on the Fatigue Behavior of A357 Aluminum Alloy Shunong Jiang1, a* and Shiyuan Xu2, b 1School of Civil Engineering, Central South University, Changsha 410075, China 2School of Materials Science and Engineering, Central South University, Changsha 410083, China ashnjiang@csu.edu.cn, bxushiyuan112@qq.com Keywords: Fatigue strength, Four-point bending test, A357 alloy, surface condition.
A great majority of the laboratory fatigue tests on structural materials are being performed on specimens with machined surfaces, which is different from the real component surfaces.
Collins, Failure of Materials in Mechanical Design-Analysis, Prediction, and Prevention, 2nd ed., Wiley, New York, 1993
Effect of casting defects, Journal of Light Metals, 1 (2001) 73-84
Sidebottom, Advanced mechanics of materials, Wiley, New York, 1993.

Materials and Methods Materials.
Kennedy Hot Mix Asphalt Materials, Mixture Design and Construction, second ed., NAPA Research and Education Foundation, Maryland, 1996
State of the Art Report on Ageing Test Methods for Bituminous Pavement Materials, The International Journal of Pavement Engineering Vol. 4 (3), (2003) 165–176
Proceedings of World Academy of Science, Engineering and Technology. (2008)
[9] American Society for Testing and Materials (ASTM).

Introduction Machining processes shape parts by removing unwanted materials [1].
Theoretically, efficient high-performance machining is achieved by maximizing the material removal rate.
The software was developed by Professor Dong Woo Cho, in the Department of Mechanical Engineering at Pohang University of Science & Technology, South Korea.
The geometry of the set workpiece is shown in Fig. 1a; the material of the workpiece was Aluminum 6061.
Wang, Journal of Manufacturing Systems, 7(1)(1988) p.57 [7] Z.Z.

Main parameters to be considered are related with both geometry and materials properties [6-13].
Physical properties of different materials used in the fabrication of sun point collector and flat plate collector are given in the table 2 as below.
Table 2 Properties of different materials used in sun point collector and flat plate collector Materials Thermal Conductivity {W/ (m K)} Reflectivity (%) Absorptivity (%) Transmitivity Emissivity Copper 385 - 401 92 - 94 93 - 0.07 Aluminium 204 - 250 80 10-40 - 0.05 Acrylic Sheet 0.17 – 0.2 4 50 92 0.94 Wood 0.04 – 0.17 - - - 0.9 Glass Wool 0.04 97 80 - 0.8 Chrome Paint - 5 87 91 0.09 4.
It is also observed that these values may however, be improved by using advanced focusing techniques like two axis via internal microprocessor, better materials and good bonding methods. 7.
Sen, Solar energy in progress and future research trends, Progress in Energy and Combustion Science 30 (2004) 367–416

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