SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Juan Liu,Yanyi Liu,Yuxiang Shen,Xudong Wei,Wenhuan Yuan,Jianying Qi,Jielong Cao,Pengyuan Deng,Haiyao Hu,Liang Wang,Jin Wang
Thallium (Tl) is an untraditional toxic metal. Emerging Tl pollution has received increasing concerns. Despite its extreme biotoxicity, Tl is an irreplaceable element for specific high-tech fields (e.g., superconductors, semiconductors, and optical fibers) due to its peculiar physio-chemical properties. Besides, Tl has been also regarded as critical strategic metal owing to its low abundance and scarcity in the earth’s crust. Herein, a novel composite of α-FeOOH@BC was facilely synthesized via biochar modification with environmentally abundant iron oxides (α-FeOOH) to separate Tl(I) from wastewater. The results showed that overall large distribution coefficient values ( K d > 5000 mL/g) of Tl separation by α-FeOOH@BC in a wide pH range (5.0–11.0) were achieved, suggesting a generally promising Tl separation capacity. Multiple characterizations with Scanning Electron Microscope-Energy Dispersive Spectrometer (SEM-EDS), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) indicate that the dominant Tl separation mechanisms included electrostatic attraction, ion exchange and complexation. These findings indicate that the α-FeOOH@BC material may have important application in Tl separation from industrial wastewaters, which are usually moderately acidic with pH values ranging from 5.0 to 7.0. This study offers novel perspectives on using environmental abundant iron oxides modified biochar for easy and fast separation of Tl from industrial wastewater. All these findings can facilitate to develop waste-to-resources strategy for recycling Tl in the loop of circular economy and industrial symbiosis.
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
CHEMOSPHERE
·
2020
·
IF 5.778
Fu He,Wencheng Ma,Dan Zhong,Yixing Yuan
The pipe deposits from water distribution network are iron-wastes, which could be used as a catalyst of advanced oxidation processes (AOPs). This paper prepared one main composition (α-FeOOH) of pipe deposits and compared the difference of chloramphenicol (CAP) degradation by α-FeOOH-activated hydrogen peroxide/persulfate and α-FeOOH-activated hydrogen peroxide/peroxymonosulfate with hydroxylamine assistance. Several key affecting factors were investigated. The results revealed that the double-oxidant system has a synergy effect in CAP degradation process. The hydroxyl radicals were identified as the predominant radicals in two different degradation processes via electron paramagnetic resonance (EPR) technique. The possible degradation pathways and products were confirmed by liquid chromatography-mass spectrometry (LC-MS). This study provided a theoretic research for pollutant removal by taking full advantage of pipe deposits and advance the development of water quality security in water distribution network in future.
研究领域:
环境科学
·
水处理工程
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhilan Du,Dashuang Wang,Haoyu Fu,Xudong Liu,Shuang Yi,Jinsong Rao,Xiaoying Liu,Yuxin Zhang
High-performance microwave absorbers are mainly based on reasonable microstructural designs and composition regulation. Herein, a broadband microwave absorber was obtained by a two-step hydrothermal method. Notably, the transformation of MnO2 nanosheets to α-FeOOH nanorods was successfully realized on carbon aerogel powder, and the microwave absorption effect of the absorber can be adjusted in three-band absorption (S, X, and Ku bands) by changing the thickness of the absorber. The results show that the minimum reflection loss (RLmin) of the α-FeOOH/CA composite is −38 dB at a frequency of 13.28 GHz, and the corresponding effective absorption bandwidth of less than −10 dB could completely cover the Ku band. This study provides a new idea for designing carbon aerogel powder microwave absorbers reasonably and for adjusting impedance effectively.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 43
·30176-30189
·
IF 3.9
Wei Yang,Lei Zhang,Meng Li,Ting Zhang,Yue Liu,Juan Liu
In this work, bamboo charcoal (BC) is prepared by pyrolysis of bamboo. Then, KOH modification and surface deposition of Goethite (α-FeOOH) are performed to obtain a new KOH-modified BC loaded with α-FeOOH (FKBC) adsorbent for copper (Cu2+) and fluoride (F−) ion adsorption from aqueous solution. Surface morphology and physiochemical properties of the prepared adsorbent are characterized by scanning electron microscopy-energy dispersive spectrometer, X-ray diffraction, and N2 adsorption–desorption. The effect of pH, contact time, adsorbent dosage, and initial concentration on Cu2+ and F− adsorption is also investigated. In addition, adsorption kinetics and isotherms are fitted to pseudo-second-order kinetics and Langmuir model, respectively. Thermodynamic parameters suggest that the adsorption process is spontaneous and endothermic. The adsorption mechanism is further characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The Cu2+ absorption mainly occurs through ion exchange, coordination reactions, and surface precipitation, while the F− adsorption mainly occurs via ion exchange and hydrogen bonding. The selective adsorption experiments reveal that FKBC has good selectivity for Cu2+ and F−. The adsorption–desorption experimental results indicate that FKBC can be reused for Cu2+ and F− adsorption after regeneration. Results indicate that FKBC can be a promising adsorbent for Cu2+ and F− removal from aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2706
·
IF 3.1
Yingzhe Du,Lili Li,Yukun Yuan,Yufaning Yin,Genggeng Dai,Yaqing Ren,Shiying Li,Peng Lin
Throughout the nuclear power production process, the disposal of radioactive waste has consistently raised concerns about environmental safety. When the metal tanks used for waste disposal are corroded, radionuclides seep into the groundwater environment and eventually into the biosphere, causing significant damage to the environment. Hence, investigating the adsorption behavior of radionuclides on the corrosion products of metal tanks used for waste disposal is an essential component of safety and evaluation protocols at disposal sites. In order to understand the adsorption behavior of important radionuclides60Co,59Ni,90Sr,135Cs and129I on α-FeOOH, the influences of different pH values, contact time, temperature and ion concentration on the adsorption rate were studied. The adsorption mechanism was also discussed. It was revealed that the adsorption of key nuclides onto α-FeOOH is significantly influenced by both pH and temperature. This change in surface charge corresponds to alterations in the morphology of nuclide ions within the system, subsequently impacting the adsorption efficiency. Sodium ions (Na+) and chlorate ions (ClO3−) compete for coordination with nuclide ions, thereby exerting an additional influence on the adsorption process. The XPS analysis results demonstrate the formation of an internal coordination bond (Ni–O bond) between Ni2+and iron oxide, which is adsorbed onto α-FeOOH.
研究领域:
环境科学
·
核能工程
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Dandan Fu,Zhuoqun He,Shanshan Su,Bin Xu,Yuling Liu,Yaping Zhao
Arsenic pollution has caused worldwide attention due to its mandatory toxicity. Chemical structures of the adsorbent and arsenic species greatly influence the arsenic adsorption efficiency. The goethite impregnated graphene oxide (GO)-carbon nanotubes (CNTs) aerogel (α-FeOOH@GCA) was prepared via a facile self-assembly method of GO-CNTs induced by in-situ Fe 2+ reduction. α-FeOOH@GCA showed excellent adsorption capacities of 56.43, 24.43 and 102.11 mg g −1 for As(V), DMA and p -ASA comparing with that of 25.71, 8.03 and 14.52 mg g −1 of pristine α-FeOOH, respectively. The incorporation of GO-CNTs not only hinders the aggregation of GO-CNTs but also inhibits the growth of α-FeOOH nanoparticles greatly facilitating the diffusion and adsorption capacity of arsenic species. α-FeOOH@GCA shows wide favorable application pH for arsenic species adsorption, high adsorption kinetics and excellent reusability. The phosphate and silicate anions compete with the arsenic species for active adsorption sites due to the similar anionic structure. Based on FTIR spectra, arsenic species were proven to form inner sphere complex on the surface of α-FeOOH@GCA through different ligand exchanging mechanism greatly dependent on the molecular structures of arsenic species. The results show that α-FeOOH@GCA could be used as promising adsorbent for arsenic purification in water system.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Biochar
·
2020
·Vol. 2
·期 1
·81-92
·
IF 0
Zhu Sihang,Qu Ting,Irshad Muhammad Kashif,Shang Jianying
A novel α-FeOOH modified wheat straw biochar (α-FeOOH@BC) was developed and the findings of the current study showed that α-FeOOH@BC is an efficient material for the simultaneous removal of cations (Cd(II)) and anions (As(III)) from aqueous solutions. The SEM, FTIR, and XRD analysis proved that α-FeOOH@BC was covered by α-FeOOH. In the single adsorption system, the maximum adsorption capacities of α-FeOOH@BC for Cd(II) and As(III) were 62.9 and 78.3 mg/g, respectively. In the dual adsorption system, the maximum adsorption capacities of α-FeOOH@BC for Cd(II) and As(III) dropped to 39.3 and 67.2 mg/g, respectively. The adsorption capacities of Cd(II) and As(III) by α-FeOOH@BC were much higher by BC and α-FeOOH both in single and dual adsorbate system. The adsorption results were well fitted by the Langmuir and pseudo-second-order kinetics models. The Cd(II) and As(III) co-adsorption on α-FeOOH@BC had a competitive effect, and the dominant adsorption mechanisms were co-precipitation and ion exchange. Our study showed that α-FeOOH@BC could be an effective remediation material for Cd(II) and As(III) co-adsorption from aqueous environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
MATERIALS CHEMISTRY AND PHYSICS
·
2015
·
IF 2.259
Gang Jian,Fang Meng,Dongxiang Zhou,Qiuyun Fu,Zhili Du,Chao Yan
A textured CoFe 2 O 4 ceramic was fabricated by reactive template grain growth (RTGG) method using rod-like α-FeOOH particles as templates. The template particles were synthesized by hydrothermal method , the particles showed good crystallization and rod-like shape with a diameter of 0.1–0.2 μm and an aspect ratio of 20–50. { ll0 } oriented CoFe 2 O 4 ceramic was obtained after a sintering process. The ceramic sintered at 1150 °C for 4 h showed dense and oriented structure with orientation degree of 0.89. Different magnetic hysteresis loops were observed along the in-plane and out-of-plane direction of the textured CoFe 2 O 4 , which was due to anisotropy properties of the sample. The textured ceramic exhibited an in-plane M s enhancement (355 emu/cm 3 ) compared to that of the non-textured ceramics (320 emu/cm 3 ) in the same sintering conditions.
研究领域:
材料科学
·
磁性材料
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Xiaozeng Miao,Huiwang Dai,Jianxin Chen,Jianxi Zhu
An enhanced method of hydroxyl radical generation was studied to lead a better understanding of the catalytic mechanism of α-FeOOH in UV-Fenton system. The catalyst was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption–desorption isotherms and scanning electron microscope. The Orange II degradation and hydroxyl radical concentration under different conditions were studied in detail. The results showed that the hydroxyl radical was mainly oxidizing species for Orange II degradation. And the hydroxyl radical generation included both homogeneous and heterogeneous UV-Fenton processes. In heterogeneous UV-Fenton system, the additional oxalate could increase the ratio of homogeneous UV-Fenton process for hydroxyl radical generation. In oxalate enhanced system, the peak value of hydroxyl radical concentration would increase to 11.314 μmol/L which was nearly twice as it in heterogeneous UV-Fenton system (5.978 μmol/L). The k values of Orange II discoloration and mineralization increased to 0.386 min −1 and 0.044 min −1 , which were 1.169 and 0.692 times as that in heterogeneous UV-Fenton system (0.178 min −1 and 0.026 min −1 ). After treatment, the total iron ions concentration decreased to 2.357 μmol/L in oxalate enhanced system. The results indicated that additional oxalate was a promising enhanced method for hydroxyl radical generation in heterogeneous UV-Fenton system with α-FeOOH as catalyst.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yi Peng,Ying Yan,Jing Wang,Ziyang Xiang,Yanmei Li,Junhui Yang,Jinglin Yin,Wenlei Wang,Hongbo Xiao
In this study, CdSe cluster-modified biogenic α − FeOOH based on macroporous biochar was constructed from rhizosphere iron plaque via pyrolysis. An ultrahigh H 2 O 2 production rate of 655.75 μmol/L was achieved by the photocatalysis-self-Fenton system within 30 min under visible light irradiation. α-FeOOH, with abundant iron ions, can directly activate H 2 O 2 to produce abundant ⋅OH radicals. It was found that As(III) (10 mg/L) could be completely degraded within 20 min. Electron spin resonance spectroscopy (ESR) and density functional theory (DFT) revealed that a suitable energy band structure was achieved by the introduction of CdSe clusters; thus, O 2 was mainly reduced to H 2 O 2 through a two-electron reduction route in the reaction system. The photogenerated electrons promoted the conversion of Fe(III)/Fe(II) by reacting with Fe(III) in α-FeOOH. The presence of H 2 O 2 and Fe 2+ in this system accelerates the oxidation of As(III) by a Fenton-like reaction.
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
Membranes
·
2022
·Vol. 12
·期 5
·447
·
IF 4.562
Yue Yao,Changyu Hou,Xin Zhang
A promising α-FeOOH-reduced graphene oxide aerogel (FeOOH-GA) has been prepared for the assembly of an enzyme electrode. The α-FeOOH-reduced graphene oxide aerogel was characterized by X-ray powder diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Raman, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The results reveal that graphene oxide is reduced by Fe2+ion and α-FeOOH nanorods anchored on the reduced graphene oxide sheet through the Fe-O-C bond. Analyses using scanning electron microscopy and the Brunauer–Emmett–Teller method show that FeOOH-GA displays a various and interconnected pore structure. The FeOOH-GA was used as a support material on the glass carbon electrode (GCE) for glucose oxidase (GOD). Electrochemistry properties and bioelectrocatalytic activities of Nafion/GOD/FeOOH-GA/GCE were achieved from cyclic voltammetry and electrochemical impedance spectroscopy. The results show that Nafion/GOD/FeOOH-GA/GCE maintains outstanding catalytic activity and electrochemical properties. The FeOOH-GA could immobilize GOD through the hydrophobicity of the reduced graphene oxide and hydroxide radical of α-FeOOH. Appropriate α-FeOOH and diversified pore structure are beneficial for electron transfer, enzyme electrode storage, and interfacial electron transfer rate. All results indicated that the α-FeOOH-reduced graphene oxide aerogel as a carrier could effectively immobilize the tested enzyme.Keywords:α-FeOOH;enzyme electrode;electrochemical catalysis;carrier
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 30
·期 2
·513-524
·
IF 1.637
Liu Huixiang,Li Zhongyu,Wang Shuang,Yuan Conghui,Xu Yiting,Luo Weiang,Chen Guorong,Zeng Birong,Dai Lizong
α-FeOOH nanocrystals were grown on the surface of polymeric spheres through in situ hydrothermal synthesis. The polymer with the surface amine groups was composed of styrene, divinylbenzene and 2-(dimethylamino)ethyl methacrylate via emulsion polymerization, which abbreviated it as PSDM. The structure and component of PSDM@α-FeOOH composites were investigated by Fourier transform infrared, thermogravimetric analysis, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope and transmission electron microscopy. It was observed that the crystal structure, morphology and dispersion of α-FeOOH depended on different factors, i.e., temperature, reactant concentration and ferric salt types. A plausible formation mechanism of PSDM@α-FeOOH composites was revealed based on the systematic investigations of the assembly process. Additionally, it was possible for this method to be extended to synthesis the composite particles for other metal ions. The photocatalytic activity of the composites had been discussed by testing the degradation of rhodamine B as well as methylene blue and neutral red in the presence of H 2 O 2 . The measurements demonstrated that PSDM@α-FeOOH composites catalyst exhibited excellent photocatalytic ability and superior stability.
研究领域:
材料科学
·
环境科学
✓ 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）