Study on Flotation Separation and Determination of Trace Copper in Water Samples Using Microcrystalline Adsorption System

Abstract:

The paper presents a novel method for the flotation separation of Cu²⁺ using microcrystalline adsorption system and the determination of trace Cu²⁺ in water samples by spectrophotometry. The effects of the dosages of KI, ascorbic acid (AA) and cetyl pyridinium chloride (CPC),various salts and acidity on the flotation yield of Cu²⁺ have been investigated. The possible flotation separation mechanism of Cu²⁺ was discussed.The results showed that under the optimum conditions, CPC cation (CPC⁺) reacted with I^- to produce the microcrystalline matter (Ms-M) of (CPC⁺·I^-),Cu²⁺ could be reduced to Cu⁺ by ascorbic acid,and then Cu⁺ reacted with I^- to form the precipitation of CuI.The precipitation of CuI was quantificationally adsorbed on the surface of Ms-M of (CPC⁺·I^-) and was floated above salt-water phase. While Zn²⁺、Ni²⁺、Co²⁺、Mn²⁺ and Fe²⁺ could not be floated.Therefore, Cu²⁺ was separated completely from the above metal ions. The proposed method has been successfully applied to the determination of trace Cu²⁺ in various environmental water samples after flotation separation using microcrystalline adsorption system, and the results agreed well with those obtained by GFAAS method.The recoveries were 97.9%~100.7%, and the RSD is 0.8%~1.3%.

• Periodical: Advanced Materials Research (Volumes 1010-1012)
• Pages: 136-141
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1010-1012.136
• Online since: August 2014
• Authors: Yu Jun Zhong, Xin Rong Wen*
• Keywords: Copper, Determination, Environmental Water Samples, Flotation Separation, Microcrystalline Adsorption

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