JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Guoli Chen,Kun Song,Xiaoming Huang,Wenbo Wang
Titanium dioxide (TiO 2 ) colloid was synthesized by using tetrabutyl titanate . TiO 2 (KH-570) intermediate was prepared by etherification reaction of TiO 2 colloid and KH-570. The CS-GMA intermediate was prepared by ring-opening reaction of chitosan (CS) and glycidyl methacrylate (GMA). Finally, copolymerization two intermediates obtain a new adsorbent, TiO 2 (KH-570)-g-(CS-GMA). The results manifest that the maximum adsorption amounts of toluene and Pb(II) are 56.62 mg/g and 623.56 mg/g, respectively. The adsorption of TiO 2 (KH-570)-g-(CS-GMA) adsorbent for toluene and Pb(II) accord with the pseudo-second-order kinetics mechanism and Langmuir equation, indicate that the TiO 2 (KH-570)-g-(CS-GMA) adsorbent has better adsorption effect on toluene and Pb(II).
研究领域:
环境科学
·
材料科学
·
化学工程
·
污染控制
·
吸附技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2021
·
IF 6.186
Dongjing Liu,Lingtao Yang,Bin Li,Jiang Wu
Rice husk , as an abundant agricultural waste and renewable biomass, is adopted to produce porous silica which is used as a potential carbon-free adsorbent for mercury emission control of coal-fired power plants. The rice husk derived porous silica (RHS) exhibits a good Hg 0 adsorption capability with Hg 0 removal efficiency above 80% in the temperature range of 60–140 °C, which is plausibly due to the big specific surface area and mesoporous structure. The mercury removal performance of RHS can be evidently reinforced by KBr modification. The optimal KBr loading value and reaction temperature are 2 wt% and 140 °C, respectively. Acidic gas components, such as NO and SO 2 , both show slight inhibitive effects on Hg 0 adsorption process probably owing to the competitive adsorption or the elimination of adsorption sites.
研究领域:
环境科学
·
大气污染控制
·
材料科学
·
吸附技术
·
能源工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 15
·8026-8038
·
IF 2.936
Shuli Liu,Zhengyang Duan,Changhua He,Xiaojun Xu,Tianguo Li,Yuhuan Li,Xuan Li,Yao Wang,Longqian Xu
Phosphate-modified baker's yeast (PMBY) was prepared, and used as a novel bio-sorbent for the adsorption of Pb2+ from aqueous solution. The influencing factors, absorption isotherms, kinetics, and mechanism were investigated. The scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) characterization and elemental analysis of PMBY showed that phosphate groups were successfully grafted onto the surface of yeast. The kinetic studies suggested that the adsorption process followed a pseudo-second-order chemisorption. The adsorption process of Pb2+ using PMBY was spontaneous and endothermic. Furthermore, the adsorption of Pb2+ on PMBY can rapidly achieve adsorption equilibrium (in just 3 min), and the maximum adsorption capacity of Pb2+ on PMBY was found to be 92 mg g−1 at 30 °C, which was about 3 times that of the pristine baker's yeast. The suggested mechanism for Pb2+ adsorption on PMBY was based upon ion-exchange, electrostatic interaction and chelation between the phosphate groups and Pb2+. However, compared with the pristine baker's yeast, the higher capacity and rapid adsorption of PMBY for Pb2+ was mainly due to the chelation and electrostatic interactions between the phosphate groups and Pb2+. In addition, the regeneration experiments indicated that the PMBY was easily recovered through desorption in 0.01 M HCl, and that PMBY still exhibited 90.77% of the original adsorption capacity for Pb2+ after five regeneration cycles. These results showed the excellent regeneration capability of PMBY for Pb2+ adsorption. PMBY has shown significant potential for the removal of heavy metals from aqueous solution due to its rapid adsorption, high-capacity and facile preparation.
研究领域:
环境科学
·
生物化学
·
环境污染治理
·
重金属吸附
·
材料科学
✓ 已验证
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 3.978
Jia-Li Gu,Wen-Yan Pi,Wei-Feng Xie,Jia-Wen Gu,Ya-Jun Wang,Li Xiao,Yong-Jin Li,Jing-Fen Li
The present work is aimed to improve the antibody adsorption performance of phenyl-based mixed-mode adsorbents by adjusting the functional group of ligand. Two new mixed-mode adsorbents coupled with 4-(aminomethyl)phenol (AMP) and 4-(aminomethyl)benzonic acid (AMA) were designed based on the structure of benzylamine (BA), where a hydroxyl or carboxyl group was introduced. Bovine serum Immunoglobulin G (IgG) and bovine serum albumin (BSA) were used as the model proteins. The adsorption isotherms of IgG and BSA were investigated at different pH values ranging from 4.0–8.9 to evaluate the adsorption performance, and protein-ligand molecular interactions were explored through addition of sodium chloride and glycerol. The results showed that both of adsorbents coupled with AMP or AMA had lower saturated binding capacities ( Q m ) towards BSA and higher adsorption capacity ratio of IgG to BSA when compared to BA-based adsorbents. The contributions of electrostatic interactions and hydrophobic interactions to proteins binding were different among these phenyl-based mixed mode adsorbents. Finally, AMP-based adsorbent possessing high adsorption capacity ratio of IgG to BSA and salt tolerance was selected to separate IgG from mimetic serum with purity higher than 96 %. The results indicated adjusting the functional groups of ligand to regulate the electrostatic and hydrophobic interactions of protein-ligand was useful to improve the antibody separation performance of mixed-mode adsorbents.
研究领域:
生物分离工程
·
免疫学
·
生物材料
·
蛋白质工程
·
生物制药
·
分子识别
·
层析技术
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2016
·Vol. 23
·期 4
·2539-2548
·
IF 3.195
He Hui,Hou Xunan,Ma Beibei,Zhuang Linzhou,Li Chuanfa,He Shihong,Chen Shuixia
Viscose fiber was oxidized with sodium periodate to prepare a reactive dialdehyde viscose fiber (DAVF) containing abundant aldehyde groups. A solid amine adsorbent (DAVF-PEI) with high amino density for CO 2 capture was then prepared by modifying DAVF with polyethylenimine (PEI). Response surface methodology (RSM) based on a three-level, three-factorial design was used to optimize the synthesis conditions of DAVF, in which multiple linear regression equations of aldehyde content and fiber mass loss degree were constructed. The well-designed DAVF was then employed as a support to graft with PEI via Schiff base reaction to prepare a solid amine fiber (DAVF-PEI) for CO 2 adsorption. The experimental results verified that DAVF-PEI possessed good thermo-stability and high CO 2 adsorption capacity (4.11 mmol/g). DAVF-PEI also showed promising regeneration performance, which could maintain almost the same adsorption capacity for CO 2 after ten adsorption and desorption recycles.
研究领域:
材料化学
·
环境科学
·
高分子科学
·
化学工程
·
吸附分离
·
碳捕集技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）