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Efficient Simultaneous Removal of Phosphorus and Copper from Wastewater by an Iron-Enhanced Dolomite Process

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Abstract

The wastewater containing phosphorus (P) and copper (Cu) is produced in large quantities during manufacturing processes such as electroless plating of Cu. The focus of this work is to develop a green and cost-efficient process for the co-removal of P and Cu from wastewater. An iron-enhanced dolomite process was employed to treat the phosphate (PO4–P) and copper contaminated water. The results showed that the co-removal of PO4–P and Cu was feasible by adjusting parameters as reagent dosage, molar ratio, stirring time, and pH. Under the conditions of Ca/Fe molar ratio of 4:1, Fe/(P+Cu) molar ratio of 1:1, initial pH of 5.6~10.0, and stirring for 30 min, the removal rates of PO4–P and Cu exceeded 99%. The mechanism research showed that the Fe ions was critical to the removal of PO4–P, which mainly removed by forming insoluble amorphous precipitate. The raw CaMg(CO3)2 is susceptible to corrosion by Cu ions and resulting in the production of flaky particles, which have two-dimensional nanostructured. The two-dimensional nanostructured is conducive to increase the contact area of particles with ions in solution, improving the chemical reactivity and adsorption. The Cu ions are likely to be removed in the form of posnjakite. The process has the advantages of being green and cost-efficient, and has a good practical application prospect for the PO4–P and Cu removal.

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Data Availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Authors and Affiliations

  1. Shcool of Civil Aviation, Zhengzhou University of Aeronautic, Zhengzhou City, Henan Province, China

    Hongyan Guan

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  1. Hongyan Guan
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Correspondence to Hongyan Guan.

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Guan, H. Efficient Simultaneous Removal of Phosphorus and Copper from Wastewater by an Iron-Enhanced Dolomite Process. Water Air Soil Pollut 234, 776 (2023). https://doi.org/10.1007/s11270-023-06805-8

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