Removal of acid dye from aqueous solutions by electrocoagulation/GAC adsorption coupling: Kinetics and electrical operating costs

Influence of operating parameters on electrocoagulation of C.I. disperse yellow 3

“…A yield of 97 % is reached at a dye concentration of 200 mg L -1 . The results obtained can be justified by the increased probability of contact with the dye molecules to aluminum hydroxide Al(OH) 3 to form flocs of large sizes; thereby facilitating their separation by their attachment to the bubbles of released gases at the electrodes. …”

“…The textile industry consumes considerable amounts of water in the dyeing and finishing. Effluents containing dyes can be toxic to the environment [1][2][3][4]. In addition, their presence in aquatic systems, even at low concentrations, is very visible.…”

Multi-Objective Optimization of Indigo Carmine Removal by an Electrocoagulation/GAC Coupling Process in a Batch Reactor

“…3,3 -dioxo-2,2 -bis-indolyden-5,5 -disulfonic acid disodium salt (C 16 H 8 O 8 N 2 S 2 Na 2 ). Its molecular structure is presented in reference (25). It has a molecular weight of 466.36 g mol −1 , a color index number of 73015, and a maximum light absorption at 610 nm.…”

“…Sanghi and Bhattacharya (24) reported results on the AC-amended chemical coagulation of dye solutions. Recently, the possibility to enhance EC systems by means of granular activated carbon (GAC) has been suggested (25,26). It was found that hybrid EC/GAC sorption systems are more efficient and faster separation techniques in comparison with the conventional EC (25,26).…”

“…In our previous work, the mechanisms of AB74 adsorption of GAC (28), removal of AB74 by conventional EC (29) and by EC/GAC (25) were investigated. Aiming at optimizing the efficiency of EC/GAC coupling system towards AB74 removal from aqueous solutions, it is important to take into account that the complex mechanisms of EC/GAC system depend on the experimental conditions, pollutant, and type of activated carbon employed.…”