DOI: 10.1016/j.watres.2018.08.022
Scopus记录号: 2-s2.0-85053030818
论文题名: Combined use of coagulation (M. oleifera) and electrochemical techniques in the treatment of industrial paint wastewater for reuse and/or disposal
作者: Barbosa A.D. ; da Silva L.F. ; de Paula H.M. ; Romualdo L.L. ; Sadoyama G. ; Andrade L.S.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 153
结束页码: 161
语种: 英语
英文关键词: Boron-doped diamond electrode
; Coagulation-flocculation
; Moringa oleifera
; Paint manufacturing wastewater
; Water reuse
Scopus关键词: Chemical water treatment
; Chemicals removal (water treatment)
; Chlorine compounds
; Coagulation
; Drug products
; Electrodes
; Electrolysis
; Flocculation
; Industrial water treatment
; Paint
; Wastewater reclamation
; Wastewater treatment
; Water conservation
; Boron doped diamond electrodes
; Coagulation flocculation
; Moringa oleifera
; Paint manufacturing wastewaters
; Water reuse
; Wastewater disposal
; coagulation
; coliform bacterium
; concentration (composition)
; crustacean
; dicotyledon
; electrochemical method
; electrode
; electrokinesis
; electrolyte
; flocculation
; plant extract
; wastewater
; wastewater treatment
; water use
; Artemia
; Artemia salina
; Moringa oleifera
英文摘要: In this work, water-based paint (WBP) wastewater was treated using a natural coagulant, Moringa oleifera aqueous extract (MOAE), fortified with Ca2+ (from nitrate and chloride salts). In order to improve the quality of the treated wastewater and render it suitable for disposal, an electrolytic flow process was associated with the wastewater treatment using a filter-press reactor with a boron doped diamond (BDD) electrode. The feasibility of the treatment was evidenced by the reuse of the treated wastewater in the production of a new paint (manufactured by the company supplying the raw wastewater), whose quality was compatible with the water used by the manufacturer. The best conditions for the coagulation-flocculation process involved the use of 80 mL of MOAE (50 g/L of MO and 0.125 mol/L of Ca2+) for every 1.0 L of wastewater at pH 6.5. The limiting current density (35 mA/cm2) and an electrolysis time of 90 min (charge passed of 3.68 A h/L) were used in the electrochemical treatment. Biotoxicity assays using the brine shrimp Artemia salina revealed that the mortality (in %) of microcrustaceans was reduced from 100% (raw wastewater) to only 11% at the end of the electrolysis process, in addition to eliminating the strong odor and 85% of the organic load. Moreover, microbiological tests showed that the number of mesophiles decreased by more than six orders of magnitude and there was no growth of thermotolerant coliforms (TC). © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112406
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Engineering, Federal University of Goiás (Universidade Federal de Goiás) - Regional Catalão, Catalão, GO 75704-020, Brazil; UAE-Chemistry, Federal University of Goiás (Universidade Federal de Goiás) - Regional Catalão, Catalão, GO 75704-020, Brazil; IBIOTEC, Federal University of Goiás (Universidade Federal de Goiás) - Regional Catalão, Catalão, GO 75704-020, Brazil
Recommended Citation:
Barbosa A.D.,da Silva L.F.,de Paula H.M.,et al. Combined use of coagulation (M. oleifera) and electrochemical techniques in the treatment of industrial paint wastewater for reuse and/or disposal[J]. Water Research,2018-01-01,145