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Materials and Methods Raw Materials.
The chemical compositions of raw materials and solutions were analyzed by ICP-OES technique (PerkinElmer® Optima™ 8000).
Gupta: Treatment of spent pickling liquor, International Journal of Advance Research in Science Engineering, Vol. 5, No. 3, pp. 259-263, 2016
Sahu: An overview of the recovery of acid from spent acidic solutions from steel and electroplating industries, Journal of Hazardous Materials, Vol. 171, pp. 61-75, 2009
Fu: Recovery of hydrochloric acid from the waste acid solution by diffusion dialysis” Journal of Hazardous Materials, Vol. 165, No. 1, pp. 832–837, 2009

Experimental Materials.
Xia, Chemistry of Materials, Vol. 20(2008), p. 5090–5099
[7] Z.Liu andY.Bando, Advanced Materials, Vol. 15(2003), p. 303–305
[11] S.H.Wu andD.H.Chen, Journal of Colloid and Interface Science, Vol., 273(2004), p. 165–169
[16] M.Salavati-Niasari andF.Davar, Materials Letters, Vol. 63(2009), p. 441–443

Journal of Hazardous Materials 149, 475-481
Journal of Hazardous Materials 164, 1586–1594
Journal of Hazardous Materials 144, 240-248
Journal of hazardous materials, 84(1), 29-41
Journal of Hazardous materials, 154(1-3), 778-786.

Tan, The effect of metal type and multi-layering on friction surfacing, Journal of Materials Processing Technology, Vol. 57 (1996) 172 -181
Jana, Friction surfacing of metal coatings on steel and aluminum substrate, Journal of Materials Processing Technology, Vol. 72 (1997) 446-452 [5] V.I.
Bedford, Decision support system to optimise the Frictec (friction surfacing) process, Journal of Materials Processing Technology, Vol. 107 (2000) 236-242 [6] M.
Jana, Study of the interfacial phenomena during friction surfacing of mild steel with tool steel and inconel, Journal of Materials Science, Vol 33 (1998) 2709-2717
Jana, Study of the interfacial phenomena during friction surfacing of aluminium with steels, Journal of Materials Science, Vol. 32 (1997) 60556062 [11] I.

Materials and methods Materials.
Mix the three materials above in equal proportion.
Test fermentation temperature of the upper materials in the fermentation devices at 8:00, 14:00 and 20:00 daily.
At the later, microorganisms degrade cellulose, lignin class material, and gradually form humus class materials[16].
Journal of Hazardous Materials. 2003, 97(l-3), p.295-314

Numerical simulation represents the complete process of concrete materials that include the initiation, propagation, and penetration of microcracks.
Journal of Congqing Jiaotong University, 2009, 28(1) : 36-40, 155(In Chinese)
A new image analysis technique for the quantitative assessment of microcracks in cement-based materials.
Journal of Southeast University,2010,(6): 1276-1281(In Chinese)
Journal of Ningbo University , 2003,16(4): 349~353.

Journal of Intelligent Material Systems and Structures, 2009, 20(5):495-503
Journal of Southeast University (Natural Science Edition), 2011, 41(6):1177-1181
Journal of Intelligent Material Systems and Structures, 2012, 23(13):1409-1421
Journal of Intelligent Material Systems and Structures, 2012, 23(13):1423-1432
Smart Materials and Structures, 2013, (22):1-11

These factors will result in the damage of concrete materials, i.e. degeneration of the property of materials.
The strength of damage field (the degeneration of the property of materials) will affect on the operation property of concrete structure.
Over the past, the damage of concrete materials was not considered to analyze the stress-field and displacement-field of concrete structure, and the concrete material of the concrete structure was considered as undamaged materials.
[4] Wang Xiangdong: Some Problems with the Handling of Figures in Experiment of Concrete, Journal of Hohai University (nature sciences) (Special) 1997
[5] Wang Xiangdong: Forecast Long-term Data of Material Coefficient with Grey System Theory, Journal of Hohai University (nature sciences) 1999.12

Synthesis of Nanocrystalline Silver by Warm-vacuum-compaction Method Wei Liu1, a, and Qionghua Zhou2, b 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, P.R.China 471003 2Medical College, Henan University of Science and Technology, Luoyang, P.R.China 471003 aliuweidavid@yahoo.com.cn, bzhouqionghua2000@163.com Keywords: Nanocrystalline silver, Warm-vacuum-compaction, Density, Microhardness Abstract.
In the last thirty years, a number of processing techniques have been developed to produce nc-materials.
Nc-materials were first fabricated by IGC, which was studied in detail by Gleiter et al. since 1980s [3].
MA is usually used to prepare brittle materials or alloys with high melting temperature.
References [1] Y.F.Shen, W.Y.Xue, Y.D.Wang, Z.Y.Liu and L.Zuo: Surface & Coatings Technology, Vol. 202 (2008), p. 5140 [2] J.Petzold: Journal of Magnetism and Magnetic Materials, Vol. 242-245 (2002), p. 84 [3] H.Gleiter: Prog.

So this is the most powerful approach to constrain the resources of ore-forming fluids and ore-forming materials.
Journal of the Geological Society., Vol. 146 (1989).p. 715
The isotopic theory and its application earth science.
Geosciences Journal.
Journal of Guilin University of Technology.