Extraction of copper(II)-NTA chelated anions from water with Aliquat 336

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · Separation Science and Technology

DOI:https://doi.org/10.1081/SS-100100781· OSTI ID:691489

Juang, R S; Huang, I P ^[1]

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1. Yuan Ze Univ., Chung-Li (Taiwan, Province of China). Dept. of Chemical Engineering

Streams containing metals and complexing agents, which are often encountered in industrial and environmental applications, are not easily treated using conventional chemical precipitation processes. A solvent extraction method is thus proposed in this work. The distribution ratios of Cu(II) between kerosene solutions of Aliquat 336 (tri-n-octylmethylammonium chloride) and the water-containing complexing agent NTA (nitrilotriacetic acid) were measured. Experiments were carried out as a function of aqueous pH, the concentration of amine, and temperature. It is shown that the distribution ratios first increased with increasing pH and then decreased with a further increase in pH. The enthalpy of the extraction was determined. Finally, the nonideal behavior of the organic phase is discussed.

• OSTI ID: 691489
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 12 Vol. 34; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CHELATING AGENTS
COPPER
DISTRIBUTION
METAL INDUSTRY
SOLVENT EXTRACTION
WASTE WATER
WATER TREATMENT