Removal of C.I. Acid Blue 25 from contaminated water by adsorption onto hardened paste of Portland cement as a lowcost adsorbent

The present study was carried out to investigate the potencial of hardened paste of Portland cement (HPPC) as a low-cost adsorbent for the removal of Acid Blue 25 (AB 25) from contaminated water by using batch adsorption studies. In this work HPPC has been selected as adsorbent because of the main advantages such as high efficiency, simple separation of sludge,abundant availability and low-cost material. The removal of dye in aqueous medium through the process of adsorption with HPPC under a set of variables (contact time, initial dye concentration, adsorbent dosage and temperature) has been investigated. Results showed that removal of AB 25 increased with increasing adsorbent dosage, temperature, contact time and initial dye concentration decreasing and having 100 percent removal of dye over 75 min. From the experimental results, it may be concluded that HPPC was an efficient and economical adsorbent for AB 25 removal.