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Received October 18, 2015
Accepted June 8, 2016
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Hydrochar preparation from black liquor by CO2 assisted hydrothermal treatment: Optimization of its performance for Pb2+ removal
1School of Engineering, Edith Cowan University, 270 Joondalup Drive Joondalup, WA 6027, Australia 2National Engineering Laboratory of Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3Department of Sports Science and Technology, Shanxi Normal University, Xi’an 710068, China 4Department of Chemical Engineering, Monash University, VIC, 3800, Australia
Korean Journal of Chemical Engineering, September 2016, 33(9), 2703-2710(8), 10.1007/s11814-016-0152-0
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Abstract
Hydrochar was produced from hydrothermal treatment of corn straw black liquor. Response surface methodology (RSM) and the central composite design (CCD) were employed for determination of optimal char with maximum Pb2+ removal capacity. The operational parameters such as hydrothermal temperature (℃), duration (min) and solid liquid ratio (LSR) were chosen as independent variables in CCD. The statistical analysis indicates that the effects of hydrothermal temperature, duration, LSR and combined effect of hydrothermal temperature and duration are all significant for the Pb2+ removal capacity. The optimal condition for achieving the maximum Pb2+ adsorption capacity is obtained as the following: hydrothermal temperature (205 ℃), duration (28min), LSR (12) with Pb2+ removal capacity reaching 47mg/g. The BET specific surface area of char prepared at optimal conditions could reach 85m2/g.
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References
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Hadi P, Xu M, Ning C, Lin CSK, McKay G, Chem. Eng. J., 260, 895 (2015)
Moradi SE, Korean J. Chem. Eng., 31(9), 1651 (2014)
Mahmoudi K, Hosni K, Hamdi N, Srasra E, Korean J. Chem. Eng., 32(2), 274 (2015)
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Shen BX, Chen JH, Yue SJ, Li GL, Fuel, 156, 47 (2015)
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Guo H, Ren YZ, Sun XL, Xu YD, Li XM, Zhang TC, Kang JX, Liu DQ, Appl. Surf. Sci., 283, 660 (2013)
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Acharya J, Sahu JN, Mohanty CR, Meikap BC, Chem. Eng. J., 149(1-3), 249 (2009)
Do XH, Lee BK, J. Environ. Manage., 131, 375 (2013)
