|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Determination of the Stability Constants for Mixed-ligand Coordination Compounds in the Zn(II)-nitrilotriacetic Acid-ammonia System
||Chen Lin, Hao Zhandong, Yang Tianzu, Zhang Duchao, Liu Weifeng
|On-Site Speaker (Planned)
By means of the pH potentiometric method, this work investigates the stability constants (i=1,2) of the mixed-ligand coordination compounds in the Zn(II)-nitrilotriacetic acid (H3L)- ammonia system at the temperature of 25±0.1℃,40±0.1℃, 55±0.1℃, 70±0.1℃ and ionic strengths of 1.0, 2.0, 3.0, 4.0 (NaCl). The precise value for the stability constants are calculated with a continuously approximating method subsequent to the obtainment of their approximations via the half-integer strategy. The results indicates that the stability constants (i=1,2) increase with the decrease of temperature and decrease with the increase of ionic strength. The stability constants of mixed-ligand coordination compounds in the Zn(II)-nitrilotriacetic acid-ammonia system shows that the nitrilotriacetic acid-ammonia system can be applied to the leaching of low-grade zinc oxide ores.
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