TY - JOUR
T1 - Acid activation pine cone waste at differences temperature and selective removal of Pb2+ ions in water
AU - Huong, Pham Thi
AU - Lee, Byeong Kyu
AU - Kim, Jitae
AU - Lee, Chi Hyeon
AU - Chong, Meng Nan
N1 - Funding Information:
This research work was funded by a National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning ( 2013R1A2A2A03013138 ).
Publisher Copyright:
© 2015 The Institution of Chemical Engineers.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/3
Y1 - 2016/3
N2 - This study reports potential application of pine cones (PC) and acids treated pine cone at as adsorbents for removal of Pb2+ ions in water. Two different types of acids were used for the treatment of PC at different activation temperature, with the following combination of hydrochloric -acid treated PC at 25 °C (PC-H25) and 50 °C (PC-H50); phosphoric-acid treatmented PC at 25 °C (PC-P25) and 50 °C (PC-P50). The basic physicochemical properties of PC, both before and after acid treatment, were characterized using scanning electron microscopy (SEM), Fourier-transformed infrared spectroscopy (FTIR) and elemental analysis (EA). Bath adsorption experiments on Pb2+ ions were optimized in term of pH, adsorbent dose, reaction time and initial concentration of Pb2+ ions. It was estimated through adsorption isotherm analysis that adsorption capacities of PC-H25, PC-P25, PC-H50 and PC-P50 on Pb2+ ions were 132.6, 108.2, 148.3 and 119.8 mg/g, respectively. Desorption studies revealed the promising regeneration potential of PC, PC-H25, PC-H50, PC-P25 and PC-P50. It was found that the percentage removal of Pb2+ was maintained at more than 60% as compared to the initial value, even after 5 adsorption-desorption cycles. Furthermore, the adsorption costs required for removal of Pb2+ ions using PC, PC-P25, PC-P50, PC-H25, PC-H50 were estimated to be 1.6, 11.5, 17.5, 6.7 and 8 US$/kg, respectively. Based on these findings, PC and acid-treated PC could be used as low-cost, eco-friendly and effective adsorbents for the Pb2+ removal from water.
AB - This study reports potential application of pine cones (PC) and acids treated pine cone at as adsorbents for removal of Pb2+ ions in water. Two different types of acids were used for the treatment of PC at different activation temperature, with the following combination of hydrochloric -acid treated PC at 25 °C (PC-H25) and 50 °C (PC-H50); phosphoric-acid treatmented PC at 25 °C (PC-P25) and 50 °C (PC-P50). The basic physicochemical properties of PC, both before and after acid treatment, were characterized using scanning electron microscopy (SEM), Fourier-transformed infrared spectroscopy (FTIR) and elemental analysis (EA). Bath adsorption experiments on Pb2+ ions were optimized in term of pH, adsorbent dose, reaction time and initial concentration of Pb2+ ions. It was estimated through adsorption isotherm analysis that adsorption capacities of PC-H25, PC-P25, PC-H50 and PC-P50 on Pb2+ ions were 132.6, 108.2, 148.3 and 119.8 mg/g, respectively. Desorption studies revealed the promising regeneration potential of PC, PC-H25, PC-H50, PC-P25 and PC-P50. It was found that the percentage removal of Pb2+ was maintained at more than 60% as compared to the initial value, even after 5 adsorption-desorption cycles. Furthermore, the adsorption costs required for removal of Pb2+ ions using PC, PC-P25, PC-P50, PC-H25, PC-H50 were estimated to be 1.6, 11.5, 17.5, 6.7 and 8 US$/kg, respectively. Based on these findings, PC and acid-treated PC could be used as low-cost, eco-friendly and effective adsorbents for the Pb2+ removal from water.
KW - Acid-treatment
KW - Adsorption cost
KW - Ion exchange
KW - Lead
KW - Pine cone
KW - Regeneration
UR - http://www.scopus.com/inward/record.url?scp=84959107407&partnerID=8YFLogxK
U2 - 10.1016/j.psep.2015.12.002
DO - 10.1016/j.psep.2015.12.002
M3 - Article
AN - SCOPUS:84959107407
VL - 100
SP - 80
EP - 90
JO - Process Safety and Environmental Protection
JF - Process Safety and Environmental Protection
SN - 0957-5820
ER -