TY - JOUR
T1 - Adsorption thermodynamic and kinetic studies of Pb(II) removal from water onto a versatile Al2O3-supported iron oxide
AU - Huang, Yao Hui
AU - Hsueh, Chan Li
AU - Huang, Chun Ping
AU - Su, Liang Chih
AU - Chen, Chuh Yung
PY - 2007/5/15
Y1 - 2007/5/15
N2 - The use of versatile sorbents has been investigated for wastewater treatment. An investigation into the use of activated alumina-supported iron oxide (denoted as FeAA), which is a by-product of the wastewater treatment plant. In our previous study, the FeAA has successfully been as heterogeneous photoassisted Fenton catalyst for degradation azo dye at neutral pH 7.0. In this work, the test and use of FeAA as adsorbent for the removal of lead (Pb2+) from water are carried out. The highest Pb2+ adsorption capacity was determined as 0.14 mmol g-1 for 0.8 mmol dm-3 initial Pb2+ concentration at pH 5.0 and 318 K. Adsorption data were well described by the Langmuir model and the thermodynamic constants of the adsorption process: ΔG°, ΔH° and ΔS° were evaluated as -19.4 kJ mol-1 (at 318 K), 25.73 kJ mol-1 and 0.113 J mmol-1 K-1, respectively. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data. The pseudo-second-order kinetic model provided the best correlation of the experimental data compared to the pseudo-first-order model.
AB - The use of versatile sorbents has been investigated for wastewater treatment. An investigation into the use of activated alumina-supported iron oxide (denoted as FeAA), which is a by-product of the wastewater treatment plant. In our previous study, the FeAA has successfully been as heterogeneous photoassisted Fenton catalyst for degradation azo dye at neutral pH 7.0. In this work, the test and use of FeAA as adsorbent for the removal of lead (Pb2+) from water are carried out. The highest Pb2+ adsorption capacity was determined as 0.14 mmol g-1 for 0.8 mmol dm-3 initial Pb2+ concentration at pH 5.0 and 318 K. Adsorption data were well described by the Langmuir model and the thermodynamic constants of the adsorption process: ΔG°, ΔH° and ΔS° were evaluated as -19.4 kJ mol-1 (at 318 K), 25.73 kJ mol-1 and 0.113 J mmol-1 K-1, respectively. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data. The pseudo-second-order kinetic model provided the best correlation of the experimental data compared to the pseudo-first-order model.
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U2 - 10.1016/j.seppur.2006.10.023
DO - 10.1016/j.seppur.2006.10.023
M3 - Article
AN - SCOPUS:33947657319
VL - 55
SP - 23
EP - 29
JO - Separation and Purification Technology
JF - Separation and Purification Technology
SN - 1383-5866
IS - 1
ER -