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Metallic copper removal optimization from real wastewater using pulsed electrodeposition

2019; Elsevier BV; Volume: 384; Linguagem: Inglês

10.1016/j.jhazmat.2019.121416

1873-3336

Thayane Carpanedo de Morais Nepel, Richard Landers, Melissa Gurgel Adeodato Vieira, Ambrósio Florêncio de Almeida Neto,

Copper-based nanomaterials and applications

The recovery of metals from wastewater is a recurrent problem due to numerous productive activities that produce wastewaters rich in toxic metals. Within this context, this research presents the study and optimization of copper recovery of real wastewater using pulsed electrodeposition. The studied parameters - method, current, temperature, and rotation- influence both the removal of Cu and the composition of the formed deposit, noting that the variation of these parameters enables the removal of copper with formation from crystalline oxides to crystalline copper in its metallic form. The process was optimized, and a 33.59% copper removal from a real wastewater with a deposition efficiency of 84.36% in 30 min was deemed optimal, using fast galvanic pulse, ton = 1 ms, 190 mA, 70 rpm, and 37 °C. For coating in the optimum point, a metallic and crystalline copper with 100% purity was obtained.