2.1. Materials
The antraquinone dye RB181 (CAS 126601-88-5) was chosen as
refractory model pollutant and obtained from Kucuker Co. Textile
industry, Denizli, Turkey. The aqueous solution of RB181 was
prepared by dissolving the required amount in distilled water. The
pH of the solution was adjusted using sodium hydroxide (NaOH) or
sulfuric acid (H2SO4). Hydrogen peroxide (30%, w/w) purchased
from Merck was used as received. Some previous studies have
stated that textile industry wastewaters contain different type of
dyes and their concentrations vary from 10 to 200 mg/L [19,20].
Therefore, RB181 concentration of synthetically prepared waste-
water was selected as 100 mg/L to represent actual textile
wastewater.