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- Title
Combined Coagulation and Electrochemical Process to Treat and Detoxify a Real Textile Effluent.
- Authors
Aquino, José; Pereira, Gabriel; Rocha-Filho, Romeu; Bocchi, Nerilso; Biaggio, Sonia
- Abstract
Combined coagulation and electrochemical treatment processes were used to mineralize the organic load and detoxify a real textile effluent. The coagulation step was investigated for distinct pH values (4 to 11) and Al(SO) concentrations (0.25 to 9.00 g L). Complete turbidity and partial total organic carbon (TOC) removals were attained at pH 5, using 0.50 g LAl(SO). Moreover, the coagulation process totally removed the initial toxicity (100 % mortality) of the effluent, assessed by toxicity tests with the crustacean Artemia salina. The remaining TOC was mineralized by the electrochemical step in a flow cell with a boron-doped diamond (BDD) anode, when the investigated parameters were the BDD boron-doping level (100, 500, 2500 ppm), pH (3, 7, 11, no control), and current density (10, 20, 30 mA cm). No significant differences in TOC removal were observed when the BDD anode or pH value was changed; however, as the system was under mass transport limitation, mineralization attained at low current densities led to a reasonable current efficiency (∼40 %) and low energy consumption (∼16 kW h m). The use of the electrochemical method solely led to poor TOC and turbidity removals, thus not being recommended.
- Subjects
COAGULATION; ELECTROLYTIC reduction; TEXTILE dyeing; TURBIDITY; ARTEMIA
- Publication
Water, Air & Soil Pollution, 2016, Vol 227, Issue 8, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-016-2967-z