TY - JOUR ID - 35073 TI - Adsorption Mechanism of Lead on Wood/Nano-Manganese Oxide Composite JO - Iranian Journal of Chemistry and Chemical Engineering JA - IJCCE LA - en SN - 1021-9986 AU - Al-Abdullah, Jamal AU - Al Lafi, Abdul Ghaffar AU - Alnama, Tasneem AU - Al Masri, Wafa’a AU - Amin, Yusr AU - Alkfri, Mohammed Nidal AD - Department of Protection and Safety, Atomic Energy Commission, Damascus, P.O. Box 6091, SYRIAN ARAB REPUBLIC AD - Department of Chemistry, Atomic Energy Commission, Damascus, P.O. Box 6091, SYRIAN ARAB REPUBLIC AD - Department of Physics, Atomic Energy Commission, Damascus, P.O. Box 6091, SYRIAN ARAB REPUBLIC Y1 - 2018 PY - 2018 VL - 37 IS - 4 SP - 131 EP - 144 KW - wood KW - Manganese oxide KW - Adsorption KW - Kinetics KW - Lead DO - 10.30492/ijcce.2018.35073 N2 - Discharge of untreated industrial wastewater containing heavy metals such as Pb2+ is hazardous to the environment due to their high toxicity. This study reports on the adsorption, desorption, and kinetic study on Pb2+ removal from aqueous solutions using wood/Nano-manganese oxide composite (WB-NMO). The optimum pH, contact time and temperature for adsorption were found to be 5.0, 4 h and 333 K, respectively. Pseudo-second-order kinetics best described the adsorption process with an initial sorption rate of 4.0 mg g min-1, and a half-adsorption time t1/2 of 31.6 min. Best fit for adsorption isotherm was obtained with the Brunauer-Emmett-Teller (BET) model with a maximum adsorption capacity of 213 mg/g for an initial metal concentration of 60 mg/L. Both intra-particle diffusion and film diffusion contribute to the rate-determining step. Desorption experiments with 0.5 mol/L HCl, inferred the reusability of the composite. Adsorption experiment of Pb2+ from industrial wastewater confirmed that the prepared WB-NMO is a promising candidate for wastewater treatment. The WB-NMO demonstrated high Pb2+ removal efficiency and is considered as a promising alternative and reusable composite for lead removal from contaminated effluents. UR - https://ijcce.ac.ir/article_35073.html L1 - https://ijcce.ac.ir/article_35073_14b481a26fc88ad211779fe9bd388fd1.pdf ER -