Toxicity effects of nickel electroplating effluents treated by photoelectrooxidation in the industries of the Sinos River Basin.
The Sinos river Basin is an industrial region with many tanneries and electroplating plants in southern Brazil. The wastewater generated by electroplating contains high loads of salts and metals that have to be treated before discharge. After conventional treatment, this study applied an advanced oxidative process to degrade organic additives in the electroplating bright nickel baths effluent. Synthetic rinsing water was submitted to physical-chemical coagulation for nickel removal. The sample was submitted to ecotoxicity tests, and the effluent was treated by photoelectrooxidation (PEO). The effects of current density and treatment time were evaluated. The concentration of total organic carbon (TOC) was 38% lower. The toxicity tests of the effluent treated using PEO revealed that the organic additives were partially degraded and the concentration that is toxic for test organisms was reduced.
Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR.
T
T
Benvenuti
Programa de Pós-Graduação em Qualidade Ambiental, Universidade Feevale, Novo Hamburgo, RS, BR.
Mas
M
Rodrigues
Centro de Ecologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR.
A
A
Arenzon
Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR.
A M
AM
Bernardes
Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR.
J
J
Zoppas-Ferreira
D000818:Animals; D000460:Chlorophyta / Q000187:drug effects*; D003530:Cyprinidae / Q000378:metabolism*; D003621:Daphnia / Q000187:drug effects*; D004572:Electrolysis; D004595:Electroplating; D009532:Nickel / Q000737:chemistry; D010084:Oxidation-Reduction; D010782:Photolysis; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
D009532:Nickel; D062065:Wastewater; D014874:Water Pollutants, Chemical