Oxidation of various reactive dyes with in situ electro-generated active chlorine for textile dyeing industry wastewater treatment

Rajkumar, D.; Kim, Jong Guk

doi:10.1016/j.jhazmat.2005.11.096

Cited by 341 publications

(166 citation statements)

References 27 publications

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“…7) in the COD values (a = 0.05; P \ 0.001). The effluents derived from the dyeing processes contain non-biodegradable and dissolved compounds which must be removed via a tertiary treatment because previous biological and physicochemical processes are not able to reach effluent standards (Tabrizi and Mehrvar 2004;Vidal et al 2004;Rajkumar and Kim 2006;Vilaseca et al 2010). The results for total color removal with coagulant and DFJ (92 %) are similar to those reported by Fan et al (2007) who achieved a removal rate of 94 % using a flocculation aid along with coagulant salt.…”

Section: Resultssupporting

confidence: 78%

“…The presence of dyes makes wastewater treatment difficult for the traditional techniques. The removal of dyes by physical (Golob et al 2005), chemical (Rajkumar and Kim 2006) and even biological (Zheng and Liu 2006) means is widely reported. Such techniques are incapable of causing complete degradation, and this can generate toxic by-products; some dyes are resistant to biodegradation, for example, because of their biotoxicity coupled with a possible mutagenic and carcinogenic effect (Gong et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Use of glycosides extracted from the fique (Furcraea sp.) in wastewater treatment for textile industry

Lozano-Rivas

Whiting

Gómez-Lahoz

et al. 2016

Int. J. Environ. Sci. Technol.

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The laboratory tests for the use of sapogenic amphiphilic glycosides as a coagulation-flocculation aid are presented in this paper. These amphiphilic glycosides were obtained, through a natural fermentation process, of the juice, of fique (Furcraea sp.) leaves. Decantation allows for the separation of a supernatant denominated ''supernatant fique juice'' and a decanted fraction denominated ''decanted fique juice.'' The latter contains most of the sapogenic amphiphilic glycosides and was mixed with the chemical coagulant ferric chloride hexahydrate, at varying doses. Ferric chloride hexahydrate was also used as a control to ascertain the removal efficiency of persistent contaminants from samples of a textile industry effluent. The parameters of interest were typical indicators of water quality such as color, turbidity, chemical oxygen demand, pH and conductivity. The results indicate that the decanted fique juice, when used as a coagulationflocculation aid, and upon comparison with the chemical coagulant alone, causes an additional color and turbidity reduction of 31 and 17 %, respectively. No significant differences were noted in the chemical oxygen demand values (a = 0.05; P \ 0.001). Thus, there is a scope for further research about the commercial feasibility of DFJ as an industrial water treatment agent, which reduces the toxicity of raw fique juice and its detrimental environmental effects.

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Section: Resultssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Use of glycosides extracted from the fique (Furcraea sp.) in wastewater treatment for textile industry

Lozano-Rivas

Whiting

Gómez-Lahoz

et al. 2016

Int. J. Environ. Sci. Technol.

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“…In the direct anodic oxidation process, the compounds are first adsorbed on the anode surface and then destroyed by the anodic electron transfer reaction. In the indirect oxidation process, strong oxidants such as hypochlorite/ chlorine, ozone, and hydrogen peroxide are electrochemically generated and react with the organic molecules in the bulk (Rajkumar and Kim, 2006;Rajkumar et al, 2007). Particularly, chloride has been considered for indirect oxidation since chloride salts are usually found in wastewaters (Oliveira et al, 2001, Palmas et al, 2007.…”

Section: Introductionmentioning

confidence: 99%

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Britto-Costa

Ruotolo

2012

Braz. J. Chem. Eng.

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-Industrial wastewater containing non-biodegradable organic pollutants consists of highly toxic effluents whose treatment is necessary due to environmental and economical restrictions. In order to treat these effluents, an electrochemical process using a dimensionally stable anode (DSA ® ) and boron-doped diamond (BDD) electrode was studied. The performance of these electrodes for COD removal from aqueous phenol solution was evaluated in the absence and presence of different chloride concentrations. The results showed that DSA ® could be successfully used to remove COD when high chloride concentration (3035 mg L -1 Cl -) and mild current density are employed (50 mA cm -2 ). On the other hand, the presence of chloride did not have the same significant effect on the COD depletion rate using BDD; however, under mild conditions (50 mA cm -2 , 0.190 m s -1 ), the addition of 607 mg L -1 Cl -improved the COD removal by approximately 52% after 8 hours of electrolysis. The effect of current density (i) and flow velocity (v) were also studied, and it was verified that they have an important role on the process performance, especially when DSA ® is used.

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“…Chlorine is a strong oxidising agent and has been extensively used for the purification of the raw water for drinking purposes. It also finds application in the effluent treatment [8].…”

Section: Introductionmentioning

confidence: 99%

“…Chlorine is a strong oxidising agent and has been extensively used for the purification of the raw water for drinking purposes. It also finds application in the effluent treatment [8].Hydrogen peroxide is widely used in the bleaching operations. The hydrogen peroxide along with an iron catalyst, known as Fenton's reagent, forms a strong oxidizing agent for use in the effluent treatment [9].…”

mentioning

confidence: 99%

Critical Review of Pollution Control Technologies

Kharat

2017

IJBSBE

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Submit Manuscript | http://medcraveonline.com IntroductionThe effluent generated from the industries is mostly treated using primary, secondary, tertiary and the advance treatment methods. The first step in the water pollution control is to minimize the pollution load in effluent that can be effected by preventing the raw materials or products from entering into the effluent streams. Segregation of highly polluting effluent stream from the low polluting stream followed by treatment of each effluent stream separately, gives better performance of the effluent treatment system [1]. In some cases, effluent of one industry can become the raw material of the other industries. For instance, the molasses (highly polluting effluent stream) generated from the sugar mill is used as a raw material in the fermentation (distillery) industry for production of alcohol. The second step in the effluent treatment is to collect and equalize the effluent streams that are discharged at different intervals from different stages of product manufacturing. The equalization ensures uniform characteristics in terms of pollution load, pH and the temperature. Screening and oil trap, prior to the equalization, is provided for removal of the floating solids or oil. The effluent is further treated in the primary treatment unit including addition of the coagulants such as lime, alum and polyelectrolyte followed by clariflocculator or flocculator and settling tank. Selection of the appropriate coagulants and doses of the coagulants are determined on the basis of the treatability study of effluent samples. The primary treatment helps in reduction of the total suspended solids (TSS). A significant reduction in biochemical oxygen demand (BOD) and chemical oxygen demand (COD) concentrations is also achieved. The primary treatment is followed by the secondary treatment i.e. aerobic biological treatment process and the settling, which further reduces BOD and COD concentrations in the effluent. The effluent with high BOD and COD concentrations, as in the case of slaughter houses and distilleries etc., two stage biological treatment system is preferred. Installation of an anaerobic (biomethanation) reactor prior to the aerobic treatment can facilitate recovery of methane gas and manure. The methane gas can be used as fuel in the boilers, fluid heaters and DG sets. The advance treatment technologies involving evaporation and incineration are also practiced. The advance oxidation and electrochemical coagulation process of effluent treatment have been explored for the treatment of industries.The treated effluents confirming to the prescribed standard can be discharged into inland surface water. Barring the effluents generated from tanneries, pulp and paper, textile industries and chemical industries, the effluent of some other industries can be reused for irrigation after treatment to the standards [2,3]. However, this mode of disposal is site specific and requires extensive monitoring of the soil and ground water quality. In India, Brazil and other countri...

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Oxidation of various reactive dyes with in situ electro-generated active chlorine for textile dyeing industry wastewater treatment

Cited by 341 publications

References 27 publications

Use of glycosides extracted from the fique (Furcraea sp.) in wastewater treatment for textile industry

Use of glycosides extracted from the fique (Furcraea sp.) in wastewater treatment for textile industry

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Critical Review of Pollution Control Technologies

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