Removal of Reactive Blue 13 Using Modified Cellulosic Material Based on Rice Husks

The present study deals with the removal efficiency regarding Reactive Blue 13 (RB) of a cationized cellulosic adsorbent prepared from agricultural waste. The rice husks were used as a raw material to extract and separate the cellulose by alkali and bleaching treatment. The cellulosic material was modified with N, N-dimethyl-1-octadecylamine to prepare a cationized adsorbent. The adsorption process was scrutinized across multiple parameters influencing dye removal and was well described by pseudo-second-order and Langmuir models predicting chemically rate-controlled monolayer adsorption. Thermodynamic studies show that the adsorption of RB is spontaneous and endothermic. It was established that the new cationized cellulosic material could serve as an effective adsorbent for the removal of RB from aqueous media.