Central composite design based electrocoagulation process for the treatment of textile effluent of S.I.T.E, industrial zone of Karachi City

Abstract

a b s t r a c tIn the present research work, it found that the Electrocoagulation Process (EC) could be effectively utilized for the purification of tri-dye (Yellow 145, Reactive Red 195, and Blue 222) from wastewater of the textile industry located in Karachi. In order to purify the sample from the said dyes,the impacts of operational parameters namely pH, electrolysis time, amount of electrolyte and voltage were monitored on color and COD (chemical oxygen demand) removals potency using central composite design (CCD). As a result of this, the electrolysis time and amount of electrolyte showed a greater influence on color and COD removals than pH and voltage. The R 2 (regression coefficient) values of the effluent was observed from 87% to 98% by ANOVA (Analysis of Variance). Subsequently, the kinetic reaction was also determined in the discharge of industry. Simultaneously, The Fourier transform infrared (FTIR) analysis was performed to identify the presence of functional groups of the dyes contaminated in the sample. Afterwards, the inverse relation was observed between the concentration of NaCl and the specific electrical energy consumption (SEEC). Consequently, the sludge formation of tri-dyes was obtained from sample and then calculated. By this, the industrial effluent was filtered from three harmful dyes that can be very dangerous for human as well as aquatic life. Moreover, it is cost effective technique too because its operating cost is US$ 1.360/L. Hence, this method may be used as a purifier for effluents of textile industries.

Investigating the Influence of Column Depth on the Treatment of Textile Wastewater Using Natural Zeolite

“…For instance, the data distribution for color had most of the concertation values within the range of 1000 degrees and slightly below 2000 degrees, while TDS had most of the concentration values ranging from slightly above 6000 mg/L and below 9000 mg/L. A similar trend was observed in the literature according to the study conducted by Hajira and Abdul [41], whereby the textile wastewater from Karachi City's industrial zone was investigated. Also, the median line for COD is closer to the middle, indicating that the COD data distribution is symmetric or normal, while that of TSS and DO are observed to be closer to the lower quartile, meaning the data constituted a higher frequency of high concentration values than low concentration values ("positively skewed").…”

Modeling and Optimization of Electrocoagulation Process for the Removal of Yellow145 dye Based on Central Composite Design

“…In case of using iron electrodes, the following two mechanisms have been proposed for the formation of the metal hydroxide [10]:…”