Removing heavy metals by electrocoagulation using stainless steel mesh electrodes: a study of wastewater from soil treated with metallurgical residues:  a study of wastewater from soil treated with metallurgical residues

Izabel de Oliveira da Mota; Patricia de Oliveira da Mota; João Gomes de Oliveira Filho; Leonardo Martins da Silva

doi:10.47385/cadunifoa.v11.n31.404

Authors

Izabel de Oliveira da Mota Universidade Federal Fluminense
Patricia de Oliveira da Mota Universidade Federal do Rio de Janeiro
João Gomes de Oliveira Filho Universidade Estácio de Sá
Leonardo Martins da Silva Universidade Federal Fluminense

DOI:

https://doi.org/10.47385/cadunifoa.v11.n31.404

Keywords:

new electrode, wastewater treatment, flotation

Abstract

The present work aims to study the possibility of zinc, cadmium and manganese removal from synthetic solutions simulating wastewater from washing soil by electrocoagulation process using stainless steel mesh electrodes. The influences of current density (from 10 to 40 mA cm^-2), time (20 and 40 minutes) and pH (4 to 10) on removal efficiency were explored in a batch cell to determine the best experimental conditions. Under the operating conditions tested, the best result was observed at pH = 10, corresponding about 90% of heavy metals removal from solutions initially containing 15 mg dm^-3 of each metal, with a power consumption of 9 kW h m^-3. There are few published studies using stainless steel electrodes for the treatment of mixed heavy metals and this study newly indicated that the proposed method is adequate to remove the common heavy metals found in wastewater from heavy metals polluted soil.

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Author Biography

Izabel de Oliveira da Mota, Universidade Federal Fluminense

Possui graduação em Engenharia Química pela Universidade Federal Rural do Rio de Janeiro (2008), mestrado em Engenharia Química pela Universidade Federal Rural do Rio de Janeiro (2011) e doutorado em Engenharia Metalúrgica pela Universidade Federal Fluminense (2015). Atualmente é gestora de projetos e consultora técnica da Gomes & Brito Engenharia e Consultoria, professora do Centro Universitário de Volta Redonda e professora da pós-graduação da Universidade Estácio de Sá. Tem experiência na área de Engenharia Química, com ênfase em Engenharia Química e Ambiental.

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