TY - JOUR ID - 432 TI - Desorption of Reactive Red 198 from activated carbon prepared from walnut shells: effects of temperature, sodium carbonate concentration and organic solvent dose JO - Advances in Environmental Technology JA - AET LA - en SN - 2476-6674 AU - Alimohamadi, Zohreh AU - Younesi, Habibollah AU - Bahramifar, Nader AD - Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran Y1 - 2017 PY - 2017 VL - 2 IS - 3 SP - 137 EP - 141 KW - Dye KW - activated carbon KW - Desorption KW - Batch system KW - Continuous system DO - 10.22104/aet.2017.432 N2 - This study investigated the effect of temperature, different concentrations of sodium carbonate,and the dose of organic solvent on the desorption of Reactive Red 198 dye from dye-saturated activated carbon using batch and continuous systems. The results of the batch desorption test showed 60% acetone in water as the optimum amount. However, when the concentration of sodium carbonate was raised, the dye desorption percentage increased from 26% to 42% due to economic considerations; 15 mg/L of sodium carbonate was selected to continue the processof desorption. Increasing the desorption temperature can improve the dye desorption efficiency.According to the column test results, dye desorption concentration decreased gradually with the passing of time. The column test results showed that desorption efficiency and the percentage of dye adsorbed decreased; however, it seemed to stabilize after three repeated adsorption/desorption cycles. The repeated adsorption–desorption column tests (3 cycles) showed that the activated carbon which was prepared from walnut shell was a suitable and economical adsorbent for dye removal. UR - https://aet.irost.ir/article_432.html L1 - https://aet.irost.ir/article_432_7eab348a2a6cbc63327344f0c5f521dc.pdf ER -