Paper Title:
New Xochiquetzalli Method for Sulfide Ion Determination in Aqueous Media. Application to Tailings Analysis.
  Abstract

Mining activities have deleterious impacts on the environment, such as the formation of acid mine drainage (AMD), which occurs by the action of acidophilic bacteria in tailing deposits, generating diverse types of pollution. Hence it is important to examine the potential of mining waste material to produce acid solutions. Currently, the determination of the net potential of neutralization considers the criteria of the Enviromental Protection Agency of the United States. It was concluded from experiments carried out with diverse samples from Mexico that the tailing samples studied have a high capacity of autoneutralization; although the drainage waters from the tailings and the aqueous extracts from tailing samples react acidic. It is obvious that this method of determination of the neutralization potential and the criteria accepted at the moment do not reflect the reality of the problem. The sulfide analysis in aqueous solution consists of an indirect titration of the excess iodine in two phases (water/ CCl4) with a thiosulfate solution using starch as indicator. Since the iodine is insoluble in water, the equivalent point can be uncertain because part of the iodine can be retained by the starch. Thus, the XOCHIQUETZALLI method for the sulfide ion titration, has been developed. It covers the chemical aspects of the titration procedure, such as the suitable reagents and the maximum permissible concentrations, based on the law of Lambert and Beer. This titration procedure was successfully applied to determine dissolved sulfides extracted from tailing samples.

  Info
Periodical
Advanced Materials Research (Volumes 20-21)
Edited by
Axel Schippers, Wolfgang Sand, Franz Glombitza and Sabine Willscher
Pages
226-229
DOI
10.4028/www.scientific.net/AMR.20-21.226
Citation
L. Juárez-García, R.E. Rivera-Santillán, "New Xochiquetzalli Method for Sulfide Ion Determination in Aqueous Media. Application to Tailings Analysis.", Advanced Materials Research, Vols. 20-21, pp. 226-229, 2007
Online since
July 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Guo De Li, Na Li, Shi Wei Wu
Chapter 1: Material Science
Abstract:Biological material was prepared by adhering different amount of bamboo charcoal filler into the matrix of polyvinyl formal foam by manual...
106
Authors: Xian Ping Luo, Min Hu, Chang Li Liang, Qing Hai Ge
Chapter 19: Non-ferrous Metals Metallurgy and Technology
Abstract:Iodine-iodide leaching gold ore is a promising method alternative to cyanide leaching. In this paper, Eh—pH diagram of Au-I--I2-H2O system...
3227
Authors: Hong Jing Han, Yan Guang Chen, Hong Qi Wang, Wen Guo Duan, Chao Guo, Wen Xue Yuan, Yan Qun Guo
Chapter 7: Technologies of Environmental Restoration
Abstract:The influencing factors of reaction such as reaction temperature, reaction time and the ratio of liquid to solid are investigated by...
1347