RADIOCHIMICA ACTA
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2024
·Vol. 112
·期 3
·161-173
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IF 1.4
Hongtao Xia,Yuting Liu,Yang Wang,Zihao Feng,Qi Ren,Jianqi Lv,Yang Li,Yanjun Du,Yun Wang
An innovative phytic acid modified reed straw-derived hydrochar composite (PA-C-RBC) was prepared by using inexpensive reed straw and non-toxic phytic acid for the removal of uranium(VI) from aqueous environment. Several characterization results showed that PA-C-RBC was rough and porous with a large number of hydroxyl, carboxyl, and phosphate groups. The uranium(VI) adsorption process by PA-C-RBC conformed to pseudo-second-order kinetic and Langmuir models, and the theoretical maximal adsorption capacity could attain 418.78 mg/g at pH 5.0. PA-C-RBC had 72.66 % of selectivity and 6772.99 mL/g of distribution coefficient for U(VI). Due to the strong chelating between the hydroxyl and phosphate groups on PA-C-RBC and U(VI), PA-C-RBC had excellent adsorption selectivity. These finding highlighted a high potential for removing U(VI) from aqueous solutions.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Fatang Liu,Rui Lu,Qinmin Pan
It is extremely important to develop a facile and versatile strategy for effectively separating various oil–water mixtures. Here we report that the pith of juncus (which is also known as common rushes) can serve as a versatile material for oil–water separation. Under the action of capillary force and gravity, a piece of pith automatically and continuously separates not only immiscible oil–water mixtures but also surfactant-stabilized water-in-oil emulsions with high selectivity and desirable flux. The separation strategy is cost-effective and energy-efficient because it avoids the switch of wettability, the input of additional energy, and the use of low-surface-energy chemicals or special equipment. The unique capability of the pith is mainly attributed to the presence of three-dimensionally (3D) reticular texture with highly hydrophobic and superoleophilic properties. Owing to its easy availability and high effectiveness, juncus might be a promising material aiming for oil–water separation, water treatment, and purification of solvent or fuel, and so on.
研究领域:
材料科学
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环境科学
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植物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Jiamin Yu,Yan Kang,Wenjun Yin,Jinlin Fan,Zizhang Guo
Antibiotic pollution in water is an urgent environmental problem. A novel carbon adsorbent derived from powdery puffed waterfowl feather (PPWF)-doped Phragmites australis (PA) was proposed for enhancing the removal of antibiotics from water in this study. Amoxicillin (AMX) and cephalexin (CEX) were selected as typical antibiotics. PPWF-doped (FPAC) and -undoped (PAC) carbon adsorbents were developed to test the adsorption capacities and mechanisms of AMX and CEX. Characterization techniques such as N2 adsorption/desorption, Fourier transform infrared, X-ray diffraction, scanning electron microscopy, elemental analysis, and Boehm titration were used to determine the properties of adsorbents. Results showed that more microporous structure and surface functional groups are exhibited in FPAC compared to PAC. The nitrogen-containing functional groups were introduced in FPAC. Adsorption capacities at different contact times, pH, and initial concentration were investigated by batch experiments. The AMX and CEX maximum adsorption capacities of FPAC are 25.2 and 30.1% higher than those of PAC, respectively. The kinetic data were well represented by the pseudo-second-order model for AMX and CEX adsorption. The equilibrium data agreed well with the Langmuir model for AMX adsorption and the Freundlich model for CEX adsorption. The adsorption mechanism of AMX and CEX was chemisorption, such as electrostatic attraction and covalent bonding.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Na Liu,Yinhui Li,Minggu Zhang,Naiju Che,Xianliang Song,Yanli Liu,Chengliang Li
As the substitutes of legacy long-chain per-/polyfluoroalkyl substances (PFASs), short-chain PFASs have been widely detected in the environment. Compared to long-chain PFASs, short-chain PFASs have smaller molecules and are more hydrophilic. Therefore, they are more likely to experience long-distance transport and pose lasting environmental impacts. In this study, Fe-doped (R-Fe) and Cu-doped biochars (R-Cu) were prepared using reed straw biochar (R). The results showed that the PFBA and PFPeA sorption capacities of R-Fe were 25.81 and 43.59 mg g −1 , 1.65 and 1.55 times higher than those of R, respectively. The PFBA and PFPeA sorption capacities of R-Cu were 19.34 and 33.69 mg g −1 , 1.24 and 1.20 times higher than those of R, respectively. In addition, R, R-Fe, and R-Cu exhibited higher PFBA and PFPeA sorption capacities than the biochars previously reported. The excellent PFAS sorption performances of the biochars were attributed to the highly porous structure of R, which provided rich adsorption sites. Ion-pair sorption, pore filling, electrostatic interaction between the Fe/Cu and cationic groups on biochar and the anionic groups of PFASs, and hydrophobic interaction between the hydrophobic surface of biochar and the fluorinated tails of PFASs were the underlying sorption mechanisms. The biochars presented high removal rates (>86 %) of multiple PFASs (∑PFAS: 350 μg L −1 ) from synthetic wastewaters, including legacy and emerging PFASs of different chain lengths and with different functional groups. The biochars reported in this study are promising candidate adsorbents for treating waters contaminated with short-chain PFASs.
CAS / MDL:
研究领域:
环境科学
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污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECOLOGICAL ENGINEERING
·
2024
·
IF 3.9
Jize Liu,Tianxue Zhang,Xiaotong Xu,Jiayi Xu,Shuang Song,Wenchao Yang,Jianbo Han
Large amounts of dredged sediment have been produced from dredging projects worldwide, and utilizing it as a resource has become particularly important. This work improved the dredged sediment using biochar (BC), humic acid (HA), and desulfurized gypsum (DG) to restore wetland substrate. The effects of different amendments, applied alone or in combination, on the physicochemical properties and nutrient contents of the dredged sediment were analyzed. The improvement effects were evaluated through reed planting experiments for three months. The results indicated that BC significantly improved the plant nutrient indicator of the dredged sediment. HA reduced the BD and pH of the dredged sediment and increased its contents of various nutrients. DG enhanced the physical indicators of the dredged sediment and could be considered for dredged sediment with high nutrient contents. The two-way ANOVA results indicated that the H3 (BC-6% + HA-6% + DG-10%) combined amendment treatment group showed the optimal improvement effect on the dredged sediment. In the reed planting experiments, the average plant height and average growth rate in the H9 (BC-6% + HA-4% + DG-20%) combined amendment treatment group were the maximum, reaching 45.18 cm and 0.486 cm/d, respectively. This work is expected to raise awareness of the need to utilize marine dredged sediments as resources.
研究领域:
环境科学
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生态学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Hongli Chen,Yuping Guo,Gang Liu
Developing high performance and recyclable sorbent through a facile, low-cost, and eco-friendly way is quite important for oily wastewater treatment. Among the various fabrication approaches developed so far, the one using biomass waste as starting materials is particularly attractive in view of the cost and environmental benignity. Herein, a magnetic chitosan/typha orientalis fibers aerogel (MCS/TOFs) with excellent elasticity and superhydrophobicity was facilely prepared through freeze-drying and subsequent low-temperature annealing of biomass fibers (typha orientalis fibers, TOFs), chitosan (CS), and Fe 3 O 4 nanoparticles. Benefiting from the 3D interconnected porous structure, superhydrophobic-lipophilic surface, and capillary effect of TOFs, the MCS/TOFs aerogel exhibited excellent sorption performance including fast sorption speed (few second to achieve saturation), high sorption capacity (up to 88.4 g/g), large flux (2.2 × 10 4 L m −2 h −1 ), and high separation efficiency (98.4%). Additionally, the MCS/TOFs aerogel can be facilely separated from the solution phase by a magnet at the end of the sorption process. After removal of the adsorbate by extrusion, the recovered MCS/TOFs can be used for next separation cycle, delivering high sorption capacity retention (> 91% of the initial capacity) after ten sorption-extrusion cycles. This work provides a facile biomass-based approach to high-performance and recyclable sorbent for oily wastewater treatment, exhibiting great potential in practical applications.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY
·
2020
·
IF 4.608
Jianhua Hou,Qian Dou,Ting Jiang,Jin Yin,Junli Liu,Yuanyuan Li,Geshan Zhang,Xiaozhi Wang
Bismuth oxychloride (BiOCl) has great potential as a photocatalytic material. It is worthy to improve its photocatalytic performance by a simple and feasible method. In this work, withered cattail is carbonized directly at 800 ℃ in nitrogen atmosphere to obtain cattail carbon with good conductivity, which could be a good acceptor of photogenerated electrons. Through the one-step facile co-precipitation route with stirring at room temperature followed by the treatment of acetic acid, ultrathin nanosheets of BiOCl were synthesized and grew on the surface of cattail carbon. The BiOCl/cattail carbon composites have well-contacted heterojunction interface, hierarchical structure, high specific surface area and enhanced utilization of visible light, which allow the composites to separate the photogenerated electron-holes efficiently. Thus the BiOCl/cattail carbon composites could show excellent photocatalytic activity, which could remove rhodamine B completely within one hour under visible light. The degradation rate of the composite could achieve about 17 times higher than that of pure BiOCl. Mechanism test showed that both OH and h + active species could work together to degrade organic pollutants. Therefore, our work combines readily available and inexpensive biochar materials with BiOCl, which provides a strategy for the low-cost synthesis of efficient BiOCl-based photocatalytic materials that can be used in large-scale industrial production to be applied in the treatment of organic wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Yuanyuan Sun,Hong Li,Guangci Li,Baoyu Gao,Qinyan Yue,Xuebing Li
As biomass wastes, Arundo donax Linn and pomelo peel were used as precursors for activated carbons (ALAC and PPAC) preparation by phosphoric acid activation. The pore structure and surface acidic functional groups of both carbons were characterized by nitrogen adsorption/desorption experiment, NH 3 -temperature-programmed desorption (NH 3 -TPD) and Fourier transform infrared spectroscopy (FTIR). A batch of experiments was carried out to investigate the adsorption performances of ciprofloxacin under different conditions. Results showed that PPAC exhibited larger surface area (1252 m 2 /g) and larger portion of mesoporous, while ALAC was typical of microporous materials. Results from NH 3 -TPD suggested that ALAC was characteristic of more acidic functional group than PPAC. The maximum monolayer adsorption capability was 244 mg/g for ALAC and 400 mg/L for PPAC. Kinetics studies showed intra-particle diffusion was not the unique rate-controlling step. Boundary layer resistance existed between adsorbent and adsorbate.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Ziyan Yang,Xiaoli Yang,Tianhui Wang,Rui Hu,Junfeng Wu
Biochars treated with acids always presented enhanced sorption capacities for heavy metals. Biochars pyrolyzed at various temperatures have different compositions and present different oxidation states for the acid treatment. To optimize the surface oxidation of biochars, an appropriate pyrolysis temperature of biomass is of great importance. In this work, raw biochars prepared from Typha angustifolia at 300, 400, 450, 500 and 600 °C were oxidized by HNO 3 . The function of HNO 3 mainly focused on the surface oxidation of biochars rather than the creation of micropores in matrixes. Biochars pyrolyzed at the higher temperature were more difficult to be oxidized by the acid. The HNO 3 -activated biochars (NABCs) enriched Pb(II) and Cd(II) under various geochemical conditions including contact time, pH, ionic strengths , coexisting HA, initial heavy metal concentrations and temperatures. NABCs exhibited excellent sorption capacities (i.e., 232.6 mg/g for Pb(II), 88.9 mg/g for Cd(II) at pH 5.0 and 298 K) which were 6.9 and 5.5 times higher than these of untreated biochars. The maximum uptake capacities toward Pb(II) and Cd(II) showed an excellent linearity with the values of [O C O content × Surface area], demonstrating the essential role of the surface O C O species to coordinate heavy metals. NABCs could be well reused for six cycles through desorption using the acid pickling.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
International Journal of Low-Carbon Technologies
·
2024
·
IF 2.4
Lv Haorui,Leng Haihan,Li Bohan,Wang Qianyu,Ma Ximan,Zhou Runxuan,Yue Xiaoju,Wu Guodong
The escalating threat of pollutants, particularly aromatic hydrocarbons like benzene, toluene, ethylbenzene and xylene (BTEX), in aquatic environments necessitates effective remediation strategies. This study explores the potential of biochar derived from common reed (Phragmites australis) as a sustainable and multifaceted tool for the removal of toluene, a representative BTEX compound, from aqueous solutions. By harnessing reed straw as the precursor material for biochar production, this research showcases an environmentally friendly alternative to conventional disposal methods, such as incineration, offering the dual benefit of pollutant removal and carbon emissions reduction. The influence of pyrolysis temperature on biochar properties and its adsorption efficiency for toluene were rigorously examined, revealing a direct correlation between temperature and biochar’s pollutant sequestration capabilities. Results indicate that higher pyrolysis temperatures led to biochar (RB-750) with superior specific surface area (68.07 m2/g) and enhanced adsorption capabilities, demonstrating its potential as a powerful adsorbent in water treatment. The scanning electron microscope analysis revealed a complex, porous structure rich in active sites, validating the biochar’s suitability for pollutant adsorption. Optimal dosage was determined at 8 g/l, achieving an impressive toluene removal efficiency of 98.1%. Additionally, pH and initial toluene concentration significantly influenced removal efficiency. This study underscores the multifaceted potential of reed straw-derived biochar in combating water pollution while concurrently contributing to carbon emissions reduction through sustainable utilization of abundant wetland resources. Further research should delve into the impact of real-world conditions on its effectiveness, promising innovative solutions for environmental remediation efforts with a reduced carbon footprint.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 25
·8917-8926
·
IF 4.39
Xingyu Chen,Yifu Zhang,Chen Wang,Xueying Dong,Changgong Meng
The design and preparation of electrode materials with excellent performance is particularly important due to the current global scarcity of energy supplies, especially those using sustainable and renewable materials. In this work, it is first proposed to apply iron silicate (FeSi), which is synthesized using environmentally friendly biomass as a raw material, as an electrode material for supercapacitors (SCs). FeSi is derived from the calcination of reed leaves (RLs) in combination with a hydrothermal method, and spherical FeSi retains the porosity of the RL precursors and shows remarkable electrochemical performance. The specific capacitance of FeSi as a SC electrode can reach 575 F g−1 at 0.5 A g−1 in the voltage window from −1 to −0.5 V. Simultaneously, the FeSi electrode exhibits favorable cycling stability with 76% capacitance retention after 10 000 cycles and outstanding electrical conductivity. This finding provides a novel method of preparing a kind of untapped electrode material, porous FeSi nanoparticles derived from RLs, and the resulting FeSi material shows enormous potential for energy storage via high-performance SCs.
研究领域:
材料科学
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能源技术
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Huaxuan Zhao,Yinhai Lang
A magnetic reed biochar (MRBC) was synthesized through chemical co-precipitation firstly and subsequently pyrolysis. The MRBC and reed biochar (RBC) were characterized by SEM, XRD, FTIR and VSM and were used for the adsorption of florfenicol (FF). Batch experiment results showed that the FF adsorption on MRBC exhibited a pronounced pH-dependent pattern and presented a bell curve. However, the FF adsorption on RBC decreased gradually with the increasing pH values. Ionic strength initially inhibited and then promoted the FF adsorption and the multivalent co-existing anions significantly increased the FF adsorption on MRBC. The FF adsorption was non-spontaneous, exothermic and entropy-decreasing on MRBC and was of a non-spontaneous, endothermic and entropy-increasing nature on RBC. The pseudo second-order model presented better fittings for the FF adsorption kinetic data. Langmuir and Freundlich models can well describe FF adsorption on MRBC and RBC, respectively. The FF adsorption on RBC may be controlled by pore-filling effect and π–π EDA interaction, while hydrogen bonding, pore-filling effect and π–π EDA interaction contributed to the FF adsorption on MRBC. The adsorption–regeneration cycles confirmed that the MRBC was a highly efficient and reusable adsorbent for the removal of FF from aqueous solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）