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Zhao C, Zhang Y, Xing Y, Yang Y, Gong A, Lv Y, Zhang Y, Chen A, Liu X, Chen J. Adsorption capacity of bio-char prepared from the pyrolysis of hazelnut shells at different temperatures. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2022. [DOI: 10.1515/ijcre-2022-0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Biomass pyrolysis to produce bio-char is one of the scientific and effective means of utilizing biomass resources. Differ from previous studies, this paper explored the effect of pyrolysis temperature (400–1000 °C) on the adsorption capacity of hazelnut shell bio-char from two perspectives, including physical macroscopic structure and functional group microscopic adsorption, and the practical adsorption application tests on common 7 kinds of heavy metals in polluted water were further carried out. The results showed that the yield and adsorption of bio-char prepared at different pyrolysis temperatures varied significantly, as the temperature increased, bio-char yield and surface acid functional group content decreased, the adsorption rate on most of heavy metals increased firstly and then decreased (except for Cr6+), the adsorption capacity of bio-char prepared at above 600 °C was mainly affected by physical macroscopic structure, and at 800 °C, bio-char had a large number of pore structures, and pore structure has been fully developed, iodine adsorption value and BET specific surface area were 595.36 mg/g and 197.32 mg/m2, respectively, the adsorption effect of bio-char on Cr6+, Cd2+, Zn2+, Cu2+ and Ni2+ were best, and the adsorption rates were 45.23%, 44.14%, 60.11%, 61.28% and 65.07% respectively. It revealed that although the absorption effect of bio-chars prepared at different temperatures on different heavy metals had a great variation, large specific surface area and developed pore structure still played important role in the adsorption capacity of bio-char. These provided a reference for the application of hazelnut shell bio-char based on adsorption properties, especially absorbing heavy metals in polluted water.
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Affiliation(s)
- Chenxi Zhao
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Yu Zhang
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Yupeng Xing
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Yulong Yang
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Ao Gong
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Yuanyuan Lv
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Yuhan Zhang
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Aihui Chen
- Heilongjiang Academy of Agricultural Machinery Sciences , Harbin 150040 , China
| | - Xiaogang Liu
- Harbin University of Science and Technology , Harbin 150080 , China
| | - Juhui Chen
- Harbin University of Science and Technology , Harbin 150080 , China
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Liang L, Niu X, Han X, Chang C, Chen J. Salt sealing induced in situ N-doped porous carbon derived from wheat bran for the removal of doxycycline from aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:49346-49360. [PMID: 35217960 PMCID: PMC8881095 DOI: 10.1007/s11356-022-19186-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
In situ N-doped porous carbon (NPC) derived from wheat bran via a convenient salt sealing and air-assisted strategy was prepared for the removal of doxycycline (DOX) from aqueous solution. The NPC was precisely characterized by SEM, FTIR, XPS and BET analysis. Additionally, the experimental variables including contact time, adsorbent dosage of NPC and pH were optimized by using Box-Behnken design (BBD) under response surface methodology (RSM). The predicted adsorption capacity of DOX was found to be 291.14 mg g-1 under optimalizing experimental conditions of 196 min contact time, 0.2 g L-1 adsorbent dosage and pH 5.78. The adsorption experimental data fitted Langmuir, Koble-Corrigan and Redlich-Peterson models well, and the pseudo-second-order model perfectly described the DOX adsorption process onto NPC. Thermodynamic parameters of DOX adsorbed onto NPC indicated that the adsorption process was spontaneous and endothermic. Moreover, the adsorption of DOX on NPC was mostly controlled by electrostatic interaction, π-π electron-donator-acceptor (EDA) interaction, hydrogen-bonding and Lewis acid-base effect. Besides, the N element of NPC also played a role in capturing DOX. The maximum monolayer adsorption capacity of DOX was turn out to be 333.23 mg g-1 at 298 K, which suggested that the NPC could be a prospectively adsorbent for the removal of DOX from wastewater.
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Affiliation(s)
- Linlin Liang
- School of Chemical Engineering, Zhengzhou University, Kexue Road 100#, Henan, 450001 Zhengzhou, China
| | - Xinyong Niu
- School of Chemical Engineering, Zhengzhou University, Kexue Road 100#, Henan, 450001 Zhengzhou, China
| | - Xiuli Han
- School of Chemical Engineering, Zhengzhou University, Kexue Road 100#, Henan, 450001 Zhengzhou, China
- Henan Center for Outstanding Overseas Scientists, Zhengzhou, 450001 China
| | - Chun Chang
- School of Chemical Engineering, Zhengzhou University, Kexue Road 100#, Henan, 450001 Zhengzhou, China
- Henan Center for Outstanding Overseas Scientists, Zhengzhou, 450001 China
| | - Junying Chen
- School of Chemical Engineering, Zhengzhou University, Kexue Road 100#, Henan, 450001 Zhengzhou, China
- Henan Center for Outstanding Overseas Scientists, Zhengzhou, 450001 China
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Ajebli S, Kaichouh G, Khachani M, Babas H, El Karbane M, Warad I, Safi Z, Berisha A, Mehmeti V, Guenbour A, Bellaouchou A, Zarrouk A. The adsorption of Tenofovir in aqueous solution on activated carbon produced from maize cobs: Insights from experimental, molecular dynamics simulation, and DFT calculations. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139676] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Yu X, Han X, Chang C, Hu Y, Xu CC, Fang S. Corncob-derived activated carbon for roxarsone removal from aqueous solution: isotherms, kinetics, and mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:15785-15797. [PMID: 32088818 DOI: 10.1007/s11356-020-07942-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 01/29/2020] [Indexed: 05/26/2023]
Abstract
In this study, the adsorption of roxarsone (ROX) onto corncob-derived activated carbon (AC) was optimized using response surface methodology (RSM). Following this, the AC was comprehensively characterized by FT-IR, SEM, and EDS analysis. The results showed that the highest ROX adsorption efficiency of 304.34 mg/g was obtained at the contact time of 262 min, initial pH of 2.5, adsorbent dosage of 0.4 g/L, and initial concentration of 240 mg/L. Besides, it was found that the adsorption equilibrium data was fitted well to the Langmuir and Sips isotherm models. The thermodynamic parameters (e.g., ΔG, ΔH, and ΔS) revealed the spontaneous and exothermic nature of ROX adsorption. As indicated by pseudo second-order kinetics model, the adsorption of ROX onto AC could be achieved through the hydrogen bond, π-π adsorbate-adsorbent interaction, and electrostatic interaction between AC surface functional group and molecular species variations of ROX at different pH values. Overall, it can be concluded that corncob-derived AC is an alternative option for removing ROX from aqueous solution.
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Affiliation(s)
- Xiao Yu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Xiuli Han
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China.
- Henan Center for Outstanding Overseas Scientists, Zhengzhou, 450001, People's Republic of China.
| | - Chun Chang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
- Henan Center for Outstanding Overseas Scientists, Zhengzhou, 450001, People's Republic of China
| | - Yulin Hu
- Department of Chemical and Biochemical Engineering, Western University, London, ON, N6A 5B9, Canada
| | - Chunbao Charles Xu
- Henan Center for Outstanding Overseas Scientists, Zhengzhou, 450001, People's Republic of China
- Department of Chemical and Biochemical Engineering, Western University, London, ON, N6A 5B9, Canada
| | - Shuqi Fang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
- Henan Center for Outstanding Overseas Scientists, Zhengzhou, 450001, People's Republic of China
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