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Zhang R.,Shaanxi Normal University | Zhang R.,Kunming Metallurgy College | Wang B.,Shaanxi Normal University | Ma H.,Shaanxi Normal University
Desalination | Year: 2010

Sulfonated lignite was prepared in order to study the adsorption behavior and the removal of Cr (VI) ions from aqueous solutions as a function of contact time, initial pH, using batch technique. Adsorption data of Cr (VI) on the sulfonated lignite were analyzed according to Langmuir-Freundlich and Temkin adsorption models. Thermodynamic parameters for the adsorption system were determinated at 293 K, 303 K and 313 K. (ΔH° = 14.16 kJ mol- 1; ΔGO =-4.43 to-5.71 kJ mol- 1 and ΔS = 63.42 J K- 1 mol- 1). The numerical values obtained showed that Cr (VI) adsorption is a spontaneous, entropy-driven and endothermic process. The process kinetics was evaluated by pseudo-first, pseudo-second order and Elovich kinetic models. Elovich kinetic model exhibited the highest correlation with data. These results show that the sulfonated lignite could be considered as a potential adsorbent for chromium ions in aqueous solutions. © 2009 Elsevier B.V. All rights reserved. Source


Huang H.,Kunming Metallurgy College
Advances in Energy Science and Equipment Engineering - Proceedings of International Conference on Energy Equipment Science and Engineering, ICEESE 2015 | Year: 2015

In recent years, solvent extraction technology is applied more and more widely in zinc and copper solution in hydrometallurgy processing, but the research is far from enough. Under acid system and ammonia system, all kinds of extraction agents’ effects are different in the process of extraction. How to choose and develop an appropriate zinc/copper extraction agent according to a different solution becomes a valuable research direction. © 2015 Taylor & Francis Group, London. Source


Yang Y.H.,Kunming Metallurgy College
Applied Mechanics and Materials | Year: 2014

China has the biggest building construction market in the world today and it is growing at an explosive rate. At present, more than 85% of China's newly constructed buildings and more than 95% of the existing buildings are high energy consumption buildings. 1 Green building is undoubtedly a great emerging market for the Chinese building industry, green and clean technology and products are becoming rapidly growing market in China. Both the new green building construction and existing building's energy retrofit market will significantly grow in future. This paper discusses features of the green building development in China with respect to various aspects of the green building development situations, green building rating systems and its features so as to make further improvements. The discussion was refined based on literature reviews, requests for information from certification system owners, and interviews with certification system users and members of the industry advisory group. © (2014) Trans Tech Publications, Switzerland. Source


Wang P.,Xidian University | Zhang R.,Kunming Metallurgy College | Hua C.,CAS Institute of Process Engineering
Desalination and Water Treatment | Year: 2013

Activated carbon from crofton weed (ACCW) was evaluated for its ability to remove Cr(VI) from aqueous solutions. Batch experiments were used to examine kinetics, adsorption isotherm, pH effect, and thermodynamic parameters. Adsorption data for Cr(VI) uptake by ACCW were analyzed according to Langmuir and Freundlich adsorption models. Thermodynamic parameters for the adsorption system were determinated at 293, 303, and 313K (ΔH° = 15.02 kJ mol-1; ΔG° =-0.76 to -2.91 kJ mol-1, and ΔS° = 53.85 JK-1 mol-1). The ΔG° values obtained were negative, indicating that the adsorption of Cr(VI) on the surface of ACCW was a spontaneous adsorption process. The kinetics of this process was described very well by a pseudo-second-order rate equation. These results show that the ACCW could be considered as a potential adsorbent for Cr(VI) in aqueous solutions. © 2013 Balaban Desalination Publications. Source


Zhou S.,Kunming Metallurgy College
Proceedings - 2010 International Forum on Information Technology and Applications, IFITA 2010 | Year: 2010

How to resolve the existence limitation of the traditional artificial immune detection system, how to realize the superiority complementarities of evolution algorithm about the traditional artificial immune detection technique, how to improve detection accuracy, efficiency and safety of system, in order to resolve these problems, the article has designed a model, which can mutually study by its learning robot among the different intrusion detection systems based on artificial immune principle. We define some concepts as following: e-learning, learning robot, suspected degree, backup rule storehouse and credible third party; and then give the logical structure of the primary intrusion detection system model, architecture of the artificial immune intrusion detection system based on e-learning and principle of the model;last explain and describe this mode and learning robot. © 2010 IEEE. Source

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