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Riske KA, González Miera G, Walker GC. Virtual Issue: Interfacial Science Developments in Latin America. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:18673-18677. [PMID: 38146262 DOI: 10.1021/acs.langmuir.3c03761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
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He LT, Zhao LD, Sun W, Fang J, Liu XW, Qi JJ, Qian Y, Li H. 3D Wood Microfilter for Fast and Efficient Removal of Heavy Metal Ions from Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15319-15327. [PMID: 37846863 DOI: 10.1021/acs.langmuir.3c02129] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Adsorption is an effective method for the treatment of heavy metal ions in water; however, the existing adsorbents are complicated to prepare, and costly and difficult to recover. In this work, a 3D wood microfilter was prepared by modifying wood for the removal of heavy metal contaminants from water. First, a green deep eutectic solvent was used to remove lignin from beech wood. Then citric acid and l-cysteine were sequentially used to graft carboxyl and sulfhydryl groups (-SHs) on the surface of cellulose. Finally, a three-dimensional wood microfilter with an abundant porous structure and adsorption sites was formed. The adsorption kinetics and adsorption isotherms of heavy metal ions on the 3D wood microfilter were systematically investigated using Cu2+ and Cd2+ as model species. The results showed that the 3D wood microfilter had a fast adsorption rate and high saturation capacity for both Cu2+ and Cd2+. Based on the advantages of easy processing and multilayer assembly and stacking, a three-layer wood microfilter was designed to achieve high flux rate (1.53 × 103 L m-2 h-1) and high efficiency (>98%) for the removal of heavy metal ions in water. The enhancement mechanism of the adsorption process of Cu2+ and Cd2+ by the 3D wood microfilter was investigated using SEM and EDS, FTIR, and XPS characterization. The simple synthesis method and high adsorption efficiency of this wood microfilter provide a new strategy for the preparation of cheap, efficient, and recyclable adsorbents for heavy metal ions in water.
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Affiliation(s)
- Li-Ting He
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Liang-Dong Zhao
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Wei Sun
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Jing Fang
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Xiu-Wu Liu
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Jun-Jie Qi
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Yong Qian
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Hao Li
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
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Ge Q, Tian Q, Wang S, Zhang J, Hou R. Highly Efficient Removal of Lead/Cadmium by Phosphoric Acid-Modified Hydrochar Prepared from Fresh Banana Peels: Adsorption Mechanisms and Environmental Application. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15394-15403. [PMID: 36442158 DOI: 10.1021/acs.langmuir.2c02693] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In this work, a phosphoric acid (H3PO4)-modified hydrochar (BPH200) was prepared at a low temperature (200 °C) in an air atmosphere with fresh banana peels as the raw material. The Cd2+ and Pb2+ adsorption behaviors and mechanisms of BPH200 were explored. As the temperature rose, co-hydrothermal carbonization of the banana peels and H3PO4 enhanced the transformation of phosphorus (P) species. More orthophosphate and metaphosphate were found in BPH200 than in banana peel hydrochar (BP) without modification. The adsorption kinetics for Cd2+ and Pb2+ followed the pseudo-second-order model. The Redlich-Peterson model best fit the experimental results of the adsorption isotherm, with maximum adsorption capacities of 84.25 and 237.90 mg·g-1 for Cd2+ and Pb2+, respectively. H3PO4 promoted Cd2+ and Pb2+ adsorption by forming precipitates, which, respectively, accounted for 32.75 and 41.12% of the total adsorption onto BPH200. In addition, the cation-exchange capacities of BPH200 with Cd2+ and Pb2+ were weakened compared with those of BP. However, complexation with these two ions strengthened, accounting for 26.68 and 32.81%, respectively, of the total adsorption capacity. This indicated that the adsorption of Cd2+ and Pb2+ onto BPH200 was dominated by precipitation with minerals and complexation with oxygen-containing functional groups. The removal rates of Cd2+ and Pb2+ by BPH200 from different water bodies were more than 99.95 and 99.97%, respectively. The addition of BPH200 also decreased the amounts of bioavailable Cd2+ and Pb2+ in the soil, resulting in relatively high immobilization rates of Cd2+ (67.13%) and Pb2+ (70.07%).
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Affiliation(s)
- Qilong Ge
- Department of Architecture and Environmental Engineering, Taiyuan University, Taiyuan030032, China
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan030024, China
| | - Qi Tian
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan030024, China
- College of Civil Engineering, Taiyuan University of Technology, Taiyuan030024, China
| | - Sufang Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan030024, China
| | - Jing Zhang
- Department of Architecture and Environmental Engineering, Taiyuan University, Taiyuan030032, China
| | - Rui Hou
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou510301, China
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Cellulose Cryogels as Promising Materials for Biomedical Applications. Int J Mol Sci 2022; 23:ijms23042037. [PMID: 35216150 PMCID: PMC8880007 DOI: 10.3390/ijms23042037] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/04/2022] [Accepted: 02/11/2022] [Indexed: 02/01/2023] Open
Abstract
The availability, biocompatibility, non-toxicity, and ease of chemical modification make cellulose a promising natural polymer for the production of biomedical materials. Cryogelation is a relatively new and straightforward technique for producing porous light and super-macroporous cellulose materials. The production stages include dissolution of cellulose in an appropriate solvent, regeneration (coagulation) from the solution, removal of the excessive solvent, and then freezing. Subsequent freeze-drying preserves the micro- and nanostructures of the material formed during the regeneration and freezing steps. Various factors can affect the structure and properties of cellulose cryogels, including the cellulose origin, the dissolution parameters, the solvent type, and the temperature and rate of freezing, as well as the inclusion of different fillers. Adjustment of these parameters can change the morphology and properties of cellulose cryogels to impart the desired characteristics. This review discusses the structure of cellulose and its properties as a biomaterial, the strategies for cellulose dissolution, and the factors affecting the structure and properties of the formed cryogels. We focus on the advantages of the freeze-drying process, highlighting recent studies on the production and application of cellulose cryogels in biomedicine and the main cryogel quality characteristics. Finally, conclusions and prospects are presented regarding the application of cellulose cryogels in wound healing, in the regeneration of various tissues (e.g., damaged cartilage, bone tissue, and nerves), and in controlled-release drug delivery.
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Qiu X, Wang X, Chen S. A stable and easily regenerable solid amine adsorbent derived from a polyethylenimine-impregnated dialdehyde-cellulose/graphene-oxide composite. NEW J CHEM 2022. [DOI: 10.1039/d2nj00530a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A DAC-GO composite adsorbent with high CO2 adsorption capacity and low regeneration energy consumption was prepared through oxidation-gelation and crosslinking-amination.
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Affiliation(s)
- Xianyu Qiu
- PCFM Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Xiaoqiong Wang
- PCFM Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Shuixia Chen
- PCFM Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
- Materials Science Institute, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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Yang CX, Zhu Q, Dong WP, Fan YQ, Wang WL. Preparation and Characterization of Phosphoric Acid-Modified Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9253-9263. [PMID: 34286996 DOI: 10.1021/acs.langmuir.1c01468] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Phosphoric acid-modified biochar (PMBC) was prepared using biochar (BC) as the carbon source and phosphoric acid as the activating agent. The PMBC exhibited an ordered vessel structure after deashing treatment, but the sidewalls became much rougher, the polarity (O/C atomic ratio of BC = 0.2320 and O/C atomic ratio of PMBC = 0.1604) decreased, and the isoelectric points (PI of BC = 5.22 and PI of PMBC = 5.51) and specific surface area (SSA of BC = 55.322 m2/g and SSA of PMBC = 62.285 m2/g) increased. The adsorption characterization of the removal of sulfadiazine (SDZ) from PMBC was studied. The adsorption of SDZ by PMBC was in accordance with the Langmuir isotherm model and the pseudo-second-order kinetics model, and the adsorption thermodynamics were shown as Gibbs free energy < 0, an enthalpy change of 19.157 kJ/mol, and an entropy change of 0.0718 kJ/(K·mol). The adsorption of SDZ by PMBC was a complicated monolayer adsorption that was spontaneous, irreversible, and endothermic, and physical adsorption and chemical adsorption occurred simultaneously. The adsorption process was controlled by microporous capture, electrostatic interactions, hydrogen-bond interactions, and π-π interactions. PMBC@TiO2 photocatalysts with different mass ratios between TiO2 and PMBC were prepared via the in situ sol-gel method. PMBC@TiO2 exhibited both an ordered vessel structure (PMBC) and irregular particles (TiO2), and it was linked via Ti-O-C bonds. The optimal mass ratio between TiO2 and PMBC was 3:1. The removal of SDZ via PMBC@TiO2 was dependent on the coupling of adsorption and photocatalysis. The PMBC-enhanced photocatalytic performance of PMBC@TiO2 resulted in a higher absorption of UV and visible light, greater generation of reactive oxygen species, high levels of adsorption of SDZ on PMBC, and the conjugated structure and oxygen-containing functional groups that promoted the separation efficiency of the hole-electron pairs.
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Affiliation(s)
- Chuan Xi Yang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Qing Zhu
- Shandong Research Center of Statistical Analysis of Science and Technology, Jinan 250101, China
| | - Wen Ping Dong
- Shandong Academy of Environmental Science Co., Ltd., Jinan 250013, China
- Shandong Huankeyuan Environmental Engineering Co., Ltd., Jinan 250013, China
| | - Yu Qi Fan
- Institute of Environment and Ecology, Shandong Normal University, Jinan 250358, China
| | - Wei Liang Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China
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