Zirconium Phosphonate Sorbent Materials—Synthesis, Characterization, and Application for Copper Removal from Acidic Wastewater
Marta Marszałek, Marcin Piotrowski, Bożena Druzgała, Zbigniew Wzorek
TL;DR
This paper presents a new zirconium-based sorbent that efficiently removes copper from acidic wastewater, outperforming commercial alternatives.
Contribution
The synthesis of amorphous zirconium phosphonate materials with tunable P:Zr ratios and their application for copper removal is novel.
Findings
Zirconium aminotris(methylenephosphonate) with a P:Zr ratio of 50:1 shows the highest copper sorption capacity (62.3 mg/g).
The material exhibits fast kinetics and high affinity for copper ions (log Kd = 2.7–3.9).
The sorbent can be regenerated with high Cu²⁺ recovery (up to 95%) using common acids.
Abstract
Copper removal from wastewater is a major challenge in the treatment of both hydrometallurgical copper recycling effluents and mining wastewater. The use of sorbents is considered the most efficient and environmentally friendly method for this purpose. Zirconium aminotris(methylenephosphonates) exhibit excellent sorption properties towards many metal ions. Therefore, the goal of this research was to synthesize amorphous zirconium phosphonate materials with a wide range of P:Zr molar ratios (0.5–100) in the reaction mixture and under mild conditions. The obtained sorbents were characterized using ATR-FTIR, XRD, SEM-EDS, CHN analysis, and pH titration. The sorption properties of the zirconium aminotris(methylenephosphonates) were studied in pure copper solutions and in the complex acidic solutions (pH 1.6–3.2). The results were compared with those for the commercially available resins…
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Taxonomy
TopicsChemical Synthesis and Characterization · Radioactive element chemistry and processing · Extraction and Separation Processes