MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Mengyue Li,Yi Zhai,Xubin Zhang,Fumin Wang,Guojun Lv,Mengyao Li,Qing Zhang,Yongkui Liu
It is of great significance to develop a novel strategy to synthesize hollow zeolite without using mesoporogens due to its extremely short diffusion length. Ferric nitrate as a common iron source and structure direction agent has been used for synthesizing Fe-doped zeolite. However, the effect of ferric nitrate on the morphology of zeolite has not yet been elaborated. Here, we successfully synthesized hollow MFI zeolite with a framework iron-rich surface by using ferric nitrate as an iron source and seed-assistant strategy. It is the first time to propose that inorganic iron has the hollow structure-directing effect. Herein, by comparatively investigated the effect of iron content on the structure and evolution process of hollow zeolite, a novel crystallization mechanism has been proposed based on the competitive relationship between crystallization and dissolution rates. When the Si/Fe ratio reaches 25, the internal dissolution rate of seeds is faster than the surface crystallization rate of zeolite, the hollow structures are acquired. The obtained Fe-doped hollow zeolite exhibits superior catalytic performance for the reaction of phenol degradation. In this reaction, the higher effectiveness factor (η) close to 1 of Fe-doped hollow zeolite confirmed by calculations indicates its superior mass transferability.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zhi-Zhong Shen,Rui-Xiang Wang,Hong-Yan Yuan,Yong Guo,Dan Xiao,Yan Meng
The abundance of laterite nickel tailings after nickel extraction not only generate severe environmental contamination but also result in significant waste of metal resources, particularly iron (Fe). Herein, a promising technic of recycling tailings to high-value Fe-based energy storage materials is developed to address above challenges. The traditional hydrometallurgy is firstly applied to leach Fe source from laterite nickel tailings. By referencing the Eh-pH thermodynamic stability phase diagram of the phosphorus system, Fe could be preferentially precipitated in various metal elements, enabling the effective extraction of Fe as raw iron phosphate (FePO 4 ). Notably, a two-step purification strategy is designed to remove residual impurity and adjust Fe/P ratio, subsequently obtaining the high-purity battery-grade FePO 4 . Finally, a solid-phase method is conducted to prepare nano lithium iron phosphate (LiFePO 4 ) with outstanding electrochemical performance (1C > 150 mAh/g), meeting rigorous commercial standards. Economic analysis further confirms the significant value of implementing this scalable recycling technic, and the potential industrial application is highly anticipated. Thus, this research proposes a sustainable tailings recovery methodology, offering valuable insights for the recycling of other Fe-containing resources.
研究领域:
材料科学
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环境科学
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能源存储
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2024
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IF 9.7
Yunfei Yang,Xiang Cheng,Eldon R. Rene,Bin Qiu,Qian Hu
The iron materials are commonly employed to enhance resource recovery from waste activated sludge through anaerobic digestion (AD). The influence of different iron sources, such as Fe 2 O 3 , Fe 3 O 4 , and FeCl 3 on methane production and phosphorus transformation in AD systems with thermal hydrolyzed sludge as the substrate was assessed in this study. The results indicated that iron oxides effectively promote methane yield and methane production rate in AD systems, resulting in a maximum increase in methane production by 1.6 times. Soluble FeCl 3 facilitated the removal of 92.3% of phosphorus from the supernatant through the formation of recoverable precipitates in the sludge. The introduction of iron led to an increase in the abundance of bacteria responsible for hydrolysis and hydrogenotrophic methanogenesis. However, the enrichment of microbial communities varied depending on the specific irons used. This study provides support for AD systems that recover phosphorus and produce methane efficiently from waste sludge.
研究领域:
环境工程
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生物技术
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废物管理
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF TRACE ELEMENTS IN MEDICINE AND BIOLOGY
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2023
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IF 3.5
Peng-Cheng Xu,Chang-Chun Song,Xiao-Ying Tan,Tao Zhao,Chong-Chao Zhong,Jie-Jie Xu,Yu-Feng Song,Zhi Luo
Background Iron is an essential metal element for organisms, whose metabolism is regulated by many genes and also dietary iron sources. However, the characterization, distribution and the responses of iron metabolism-related genes to different iron sources were not clear in fish. Methods The full-length cDNA sequences of fifteen iron metabolism-relevant genes ( tf , tfr1 , hp , fpn1 , ho1 , ho2 , tfr2 , hjv , hepcidin , fth , ftl , ftm , irp1 , irp2 and hif2α .) were obtained via 3′ and 5′ RACE PCR from yellow catfish, a widely distributed freshwater teleost in China and other Asian countries. Their molecular characterizations were analyzed via the bioinformatic methods. Real-time quantitative PCR was used to explore their mRNA distribution in nine tissues. Their mRNA expression responses in four tissues (heart, brain, kidney and gill) were explored in yellow catfish fed diets with five iron sources, including ferrous sulfate (FeSO 4 ), ferrous bisglycinate (Fe-Gly), ferrous chloride (FeCl 2 ), ferric citrate (Fe-CA) and ferric oxide nanoparticles (Fe 2 O 3 NPs). Results Compared with mammals and other teleost, these members shared similar domains. Their mRNAs were expressed in nine tested tissues, but mRNA levels varied. Yellow catfish fed the diets containing Fe-Gly and Fe 2 O 3 NPs had higher iron contents in heart, brain, kidney and gill. Meantime, different dietary iron sources addition affected their mRNA expression differentially in brain, heart, kidney and gill. It should be pointed out that only three biological replicate tanks were used in the present feeding treatment , and more biological replicate tanks (more than five) should be emphasized in further researches. Conclusion Taken together, our study identified fifteen iron metabolism-relevant genes, explored their mRNA expression in nine tissues, and their mRNA expression in the responses to different dietary iron sources in four tissues, indicating their important regulatory function in iron metabolism and homeostasis.
研究领域:
水产养殖
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分子生物学
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营养学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Chenying Zhou,Zixuan Zhang,Shuang Meng,Jian Zhang,Chuanshu He,Yang Liu,Yanbiao Shi,Gang Yao,Peng Zhou,Bo Lai
Phthalates are a class of widely used endocrine-disrupting chemicals, presenting substantial health hazards upon their release into aquatic environments. Herein, the catalytic potential of two-dimensional transition metal borides (MBenes, including Fe 2 B 2 , MnB, MoB, and Mo 1.33 B) as co-catalysts for activating diverse peroxides in Fenton/Fenton-like oxidation processes, with particular emphasis on optimizing the Fe(III)/Fe(II) cycling efficiency. Under optimized conditions, the Fe 2 B 2 /hydrogen peroxide (H 2 O 2 ) system demonstrated superior catalytic performance, achieving complete degradation of dimethyl phthalate (DMP) within 15 min. This system exhibited pseudo-first-order rate constants that were 5.7–154.3 times higher than those of other MBenes/Fe(III)/H 2 O 2 systems, highlighting its exceptional catalytic efficiency. Notably, Fe 2 B 2 exhibited exceptional stability through five consecutive cycles, maintaining DMP degradation rates (∼100 %) with minimal boron leaching (∼1.05 mg/L). Mechanistic studies revealed a dual activation pathway. Surface-bound Fe(II) species decompose H 2 O 2 directly to produce hydroxyl radicals. Meanwhile, B–Fe–B bridges facilitate Fe(II) regeneration by transferring electrons from iron atoms or B B bonds in Fe 2 B 2 to dissolved FeOH 2+ species. This synergistic interaction establishes a self-sustaining catalytic cycle that significantly enhances the Fenton reaction kinetics. These findings establish Fe 2 B 2 MBene as dual-functional material that serves as both a sustainable dual-function catalyst and an efficient iron source, providing new perspectives for designing MBene-based catalysts for environmental remediation applications.
研究领域:
环境科学
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催化
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纳米技术
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Waste and Biomass Valorization
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2025
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IF 2.8
Wang Xianhong,Li Weihua,Ma Shaoyang,Yang Tingting,Chen Zhihao,Liu Yixin,Xue Tongzhan,Dong Bo
This study investigated phosphorus release, iron reduction, and the generation of volatile fatty acids (VFAs) during the anaerobic co-fermentation of waste activated sludge (WAS) and starchy food waste (SFW). Meanwhile, the formation of vivianite crystals was compared between two different iron sources: ferric oxyhydroxide (FeOOH) and iron citrate (FeC 6 H 5 O 7 ). The results showed that when the amount of SFW added was 30%, phosphorus release increased by 3.5-5 times, and the VFAs yield reached 2857.85 mg/L. When using FeC 6 H 5 O 7 as the iron source, the production of vivianite and VFAs increased by 2 times and 5 times, respectively. Additionally, citric acid enhanced the metabolic activity of acid-producing bacteria, promoting the conversion of more substrates into VFAs. The addition of organic substrates during co-fermentation promoted the growth of hydrolytic and acidogenic bacteria, enhancing hydrolysis and acidogenesis. These changes were beneficial to the biological processes of Fe 2+ and PO 4 3− release and VFAs production. The experiment further revealed that in the organic iron source FeC 6 H 5 O 7 experimental group, the acid-producing bacterial consortium preferentially utilized tyrosine-type substrates, ultimately achieving coupling between VFAs accumulation and Fe 3+ reduction. Overall, this study provides new insights into vivianite formation and VFAs production during the co-fermentation of WAS and SFW with different iron sources, offering a potential pathway for simultaneous nutrient recovery and waste valorization. Graphical
研究领域:
环境工程
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废物管理
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生物资源技术
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微生物代谢
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营养物回收
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）