TY - JOUR N2 - This study investigated the Octyl Phenol Ethoxylate (OPE) removal potentials of raw and treated industrial treatment sludges (ITS) at different pH. Experiments were conducted in a set of 500 ml Erlenmeyer flasks, into which OPE solutions of 300 ml with different initial concentrations (50–300 μg/l) were added into. Adsorption of Octyl Phenol Ethoxylate from an aqueous solution into ITS105 (T=105°C), ITS300 (T=300°C), ITS600 (T=600°C) and ITS450 (pyrolyzed, T=450°C) was carried out at a room temperature. The OPE adsorption rate increase in the treatment sludge processed at 600°C. As opposed to the sludge treated at 105°C, the adsorption rate decreased as the concentration increased. The reason for this was that the porous structure was degraded at 600°C, and the surface charge balance was disrupted. ITS300 had a lower adsorption capacity for Octyl Phenol Ethoxylate removal than ITS105, ITS600 and ITS450 (pyrolyzed). The treatment sludge pyrolyzed at 450°C conformed with the Freundlich isotherm at pH 4 (R2=0.94) and pH 7 (R2=0.89). The treatment sludge heat-treated at 600°C conformed with the Freundlich isotherm at pH 4 (R2=0.97), pH 7 (R2=0.98) and pH 10 (R2=0.99). Additionally, for ITS600, the Brunauer, Emmett and Teller (BET) isotherm was valid at neutral pH. The OPE adsorption coefficient for ITS600 at pH 4 and pH 7 was calculated as 1.05 L/μg and 1.083 L/μg, respectively. According to the BET isotherm (for ITS600) the qm values at pH 4 and pH 7 were respectively 8.21 μg/g and 2.92 μg/g. The temperature of the adsorption value obtained with the Temkin isotherm showed that the interaction between the OPE and the adsorbent substances was not a chemical or ionic interaction but probably a physical interaction. L1 - http://journals.pan.pl/Content/119445/Archives%20vol%2047%20no%201_pp53_60.pdf L2 - http://journals.pan.pl/Content/119445 PY - 2021 IS - No 1 EP - 60 KW - Waste Sludge KW - Adsorption KW - Octyl Phenol Ethoxylate KW - Pyrolyzed sludge A1 - Dinçer, Ali Rıza A1 - Aral, İbrahim Feda PB - Polish Academy of Sciences VL - vol. 47 DA - 2021.03.08 T1 - Removal of Octyl Phenol Ethoxylate (OPE) Using Processed and Unprocessed Industrial Biological Waste Sludge SP - 53 UR - http://journals.pan.pl/dlibra/publication/edition/119445 T2 - Archives of Environmental Protection ER -