Document Detail


Electrochemical oxidation of textile industry wastewater by graphite electrodes.
MedLine Citation:
PMID:  24766597     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
In the present article, studies have been performed on the electrochemical (EC) oxidation of actual textile industry wastewater by graphite electrodes. Multi-response optimization of four independent parameters namely initial pH (pHo): 4-10, current density (j): 27.78-138.89 A/m(2), NaCl concentration (w): 0-2 g/L and electrolysis time (t): 10-130 min have been performed using Box-Behnken (BB) experimental design. It was aimed to simultaneously maximize the chemical oxygen demand (COD) and color removal efficiencies and minimize specific energy consumption using desirability function approach. Pareto analysis of variance (ANOVA) showed a high coefficient of determination value for COD (R(2) = 0.8418), color (R(2) = 0.7010) and specific energy (R(2) = 0.9125) between the experimental values and the predicted values by a second-order regression model. Maximum COD and color removal and minimum specific energy consumed was 90.78%, 96.27% and 23.58 kWh/kg COD removed, respectively, were observed at optimum conditions. The wastewater, sludge and scum obtained after treatment at optimum condition have been characterized by various techniques. UV-visible study showed that all azo bonds of the dyes present in the wastewater were totally broken and most of the aromatic rings were mineralized during EC oxidation with graphite electrode. Carbon balance showed that out of the total carbon eroded from the graphite electrodes, 27-29.2% goes to the scum, 71.1-73.3% goes into the sludge and rest goes to the treated wastewater. Thermogravimetric analysis showed that the generated sludge and scum can be dried and used as a fuel in the boilers/incinerators.
Authors:
Rajendra Bhatnagar; Himanshu Joshi; Indra D Mall; Vimal C Srivastava
Related Documents :
15683907 - Composting of de-inking sludge from the recycled paper manufacturing industry.
23358537 - In situ biotreatment of tba with recirculation/oxygenation.
18575137 - Characteristics of dissolved organic matter (dom) in leachate with different landfill a...
20880627 - Municipal solid waste generation in kathmandu, nepal.
4081767 - Investigations on fly-ash and soil samples in the environment of a coal-fired power plant.
181527 - A comparative analysis of the ultrastructure of hydrocarbon-oxidizing micro-organisms.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering     Volume:  49     ISSN:  1532-4117     ISO Abbreviation:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-04-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9812551     Medline TA:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Country:  England    
Other Details:
Languages:  eng     Pagination:  955-66     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Removal of particles in organic filters in experimental treatment systems for domestic wastewater an...
Next Document:  Trace metals in the sponge Ircinia felix and sediments from north-western Trinidad, West Indies.