International Journal of Environmental Research and Public Health
·
2019
·Vol. 16
·期 12
·2187
·
IF 2.468
Yue Teng,Zhiying Liu,Ke Yao,Wenbin Song,Yongjun Sun,Hailing Wang,Yanhua Xu
The use of attapulgite (ATP)-based materials for adsorption of pollutants from water and wastewater has received growing attention. However, recovering ATP-based adsorbents remains a challenge. In this study, a magnetic adsorbent ATP/CoFe2O4with high tannic acid (TA) adsorptive capacity was fabricated via a facile co-precipitation approach and was well characterized. The loaded CoFe2O4particles were embedded into the adsorbent surfaces to allow magnetic separability. For this material, its TA adsorption kinetics, isotherm behavior, and magnetic separation efficiency are reported. The developed magnetic composites had rapid sorption kinetics of 3 h, high sorption capacity of 109.36 mg/g, and good magnetic separation efficiency of 80%. The used ATP/CoFe2O4was successfully regenerated by NaOH and reused five times without a substantial reduction in TA removal and magnetic performance. Intermolecular hydrogen bonding formation and surface complexation were identified as the sorption mechanisms of TA by ATP/CoFe2O4.Keywords:attapulgite;adsorption;CoFe2O4magnetic nanoparticle;tannic acid
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 11
·6963-6977
·
IF 1.674
Ma Xijun,Zhang Yingying,Zhou Jiuyang,Xue Yuanyuan,Shang Linjie,Xie Xingyong,Wu Zhengyan,Zhang Jing
A trisynergetic system (AFB) of nanoscale zero-valent iron (NI)–biofilm supported on attapulgite (ATP) was used to degrade nitrobenzene (NTB) in aqueous solution. We first synthesized a nanocomposite of ATP, polyvinyl alcohol, and NI as the growth carrier (AP-NI) for the biofilm. The activity of the biofilm was determined after its successful application, and the microorganisms were domesticated using NTB wastewater. The specific surface area of the AP-NI carrier was 158 m 2 /g, much higher than that of the traditional carrier polyvinyl alcohol (30.1 m 2 /g). AP-NI could be evenly distributed in water rather than settling, due to its average density of 0.647 g/m 3 . Additionally, the reductive efficiency of AP-NI towards NTB was about 91%, providing good support for the subsequent construction of the biofilm. Scanning electron microscopy (SEM) results indicated that the microorganisms were dominated by globular bacteria after acclimation, and could completely degrade 8 mg/L NTB in 24 h with high activity. The microbial activity depended more strongly on the choice of carbon source. Finally, polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) technology was used to analyze the microbial community structure and 16S ribosomal DNA (rDNA) sequence. The NTB degradation mechanism of the trisynergetic system revealed a mainly aerobic pathway with an iron cycle.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2615
·
IF 3.1
Naveed Karim,Tin Kyawoo,Chao Jiang,Saeed Ahmed,Weiliang Tian,Huiyu Li,Yongjun Feng
The continuous discharge of organic dyes into freshwater resources poses a long-term hazard to aquatic life. The advanced oxidation Fenton process is a combo of adsorption and degradation of pollutants to detoxify toxic effluents, such as anti-bacterial drugs, antibiotics, and organic dyes. In this work, an activated attapulgite clay-loaded iron-oxide (A-ATP@Fe3O4) was produced using a two-step reaction, in which attapulgite serves as an enrichment matrix and Fe3O4functions as the active degrading component. The maximum adsorption capacity (qt) was determined by assessing the effect of temperature, pH H2O2, and adsorbent. The results showed that the A-ATP@Fe3O4achieves the highest removal rate of 99.6% under optimum conditions: 40 °C, pH = 3, H2O225 mM, and 0.1 g dosage of the composite. The dye removal procedure achieved adsorption and degradation equilibrium in 120 and 30 min, respectively, by following the same processes as the advanced oxidation approach. Catalytic activity, kinetics, and specified surface characteristics suggest that A-ATP@Fe3O4is one of the most promising candidates for advanced oxidation-enrooted removal of organic dyes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2018
·Vol. 316
·期 2
·635-647
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IF 1.181
Liao Yun,Wang Meng,Chen Dajun
A novel three-dimensional porous polydopamine-functionalized attapulgite/chitosan (AT@PDA/CS) aerogel was designed and prepared for uranium(VI) adsorption, and its morphology and structure were characterized by TEM, SEM-EDS, XRD, FT-IR, Raman and XPS techniques. According to batch experiments, its adsorption equilibrium was reached within 40 min at pH 5.0. The adsorption isotherms was fitted well for Langmuir isotherm model and maximum adsorption capacity was 175.1 mg g −1 at 328 K. The thermodynamic analysis indicated that the adsorption was an endothermic and spontaneous process. Furthermore, the aerogel has superior absorption reusability and the removal efficiency was maintained at 78% after five adsorption–desorption cycles.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Wenting Gao,Bin Mu,Fangfang Yang,Yalong Li,Xiaomei Wang,Aiqin Wang
In order to fulfill people's requirements for food quality and safety, it is a promising strategy to develop intelligent biodegradable food packaging materials. Herein, honeysuckle extracts/attapulgite/chitosan composite films containing natural carbon dots were fabricated for intelligent food packaging. Different characterization techniques were employed to study the obtained composite films, while the physicochemical properties, optical properties, antibacterial and antioxidant activities of composite films were determined. The obtained composite films presented good mechanical, antibacterial and antioxidant properties, and the antibacterial ratios of composite films against Escherichia coli and Staphylococcus aureus were 99.27 ± 0.18 % and 98.85 ± 0.65 %, respectively. When the added amount of honeysuckle extracts/attapulgite nanocomposites was 4.76 %, the tensile strength and elongation at break of composite films reached 24.9 ± 2.35 MPa and 64.8 ± 2.11 %, respectively, which were obviously higher than that of pure chitosan film. Furthermore, the composite films exhibited excellent UV shielding and blue fluorescence properties, as well as pH-sensitivity due to the presence of caffeoquinic acid-based natural carbon dots derived from honeysuckle extract. Therefore, the composite films indicated a potential application for intelligent food packaging.
研究领域:
食品科学
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材料科学
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生物工程
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产品关联
DOI
PubMed
高影响因子
Applied Catalysis O: Open
·
2024
·
IF 0
Hao Li,Huixiang Hu,Haiyan Jiang,Jun Zhou,Aihe Wang
Sepiolite (SEP), a naturally abundant and environmentally friendly clay mineral, possesses various active sites and a large specific surface area. In this work, peroxymonosulfate (PMS) was activated to remove tetracycline (TC) using modified Sepiolite (MSEP), which was synthesized by ball milling and calcination techniques. According to the findings, MSEP efficiently stimulated PMS to produce 1 O 2 and ·OH radicals for the degradation of TC, with 1 O 2 being a key component of this process. The findings demonstrated that the carbonate on the MSEP surface encouraged the production of singlet oxygen. ( 1 O 2 ). Under the conditions of pH 6.5, 0.2 g/L MSEP, 2 mmol/L PMS and 25 °C, a 10 mg/L TC concentration was reduced by 93.3 % after 30 min. The presence of Cl − and NO 3 − did not inhibit TC degradation, while HCO 3 − promoted it, and H 2 PO 4 − exhibited an inhibitory effect. This work offers a novel method for using clay minerals to activate PMS and degrade organic contaminant without secondary pollution.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
Polymers
·
2018
·Vol. 10
·期 11
·1236
·
IF 2.935
Chengshuang Wang,Lili Dai,Zhengrui Yang,Chengcheng Ge,Shuiping Li,Meng He,Liang Ding,Hongfeng Xie
Polyurethane/attapulgite (PU/ATT) nanocomposites derived from castor oil were prepared by incorporation of 8 wt % ATT, acid-treated ATT, and KH560-treated ATT. The effects of three ATTs (ATT, acid-ATT, and KH560-ATT) on the comprehensive properties of PU/ATT nanocomposites were systematically investigated. The results showed that the incorporation of 8 wt % of three ATTs could produce an obvious reinforcement on the castor oil-based PU and that the silane modification treatment, rather than the acid treatment, has the more effective reinforcement effect. SEM images revealed the uniform dispersion of ATT in the PU matrix. DMA confirmed that the storage modulus and glass transition temperature (Tg) of PU/ATT nanocomposites were significantly increased after blending with different ATTs. For PU/KH560-ATT8 nanocomposites, the thermal stability of the PU was obviously enhanced by the addition of KH560-ATT. In particular, 8 wt % KH560-ATT loaded castor oil-based PU nanocomposites exhibit an obvious improvement in tensile strength (255%), Young’s modulus (200%),Tg(5.1 °C), the storage modulus at 25 °C (104%), and the initial decomposition temperature (7.7 °C). The prepared bio-based PU materials could be a potential candidate to replace petroleum-based PU products in practical applications.Keywords:polyurethane;castor oil;attapulgite;nanocomposites;reinforcement
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
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 7
·4528-4540
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IF 4.682
Chen Mingyan,Zhang Yao,Chen Jie,Liu Yucheng,Li Lingli,Du Guoyong
The porous material MOF-199 with a large specific surface area is widely used in the field of adsorption, but the single MOF material is not stable enough and the adsorption performance needs to be improved, so MOFs materials are often modified by combining with other materials. The composite material Fe 3 O 4 -ATP/MOF-199 (FAM) was prepared by solvothermal method combined with MOF-199, attapulgite (ATP) and Fe 3 O 4 . It was used in the static adsorption experiment of model oil to study the desulfurization performance, including the influence of external conditions such as adsorption time, temperature and the mass ratio of model oil to adsorbent on adsorption capacity. The structure and morphology of the adsorbent were characterized by XRD, FT-IR, SEM, VSM and BET. The experimental results show that the doping of attapulgite reduces the particle size of magnetic MOF-199 and makes the adsorbate closer to the active center of the adsorbent so as to improve the adsorption efficiency.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2016
·
IF 3.652
Kuan Ding,Zhaoping Zhong,Bo Zhang,Jia Wang,Addy Min,Roger Ruan
Pyrolysis of waste tire with HY, HZSM-5 (HZ) and purified attapulgite (PA) catalysts to produce valuable aromatic hydrocarbons has been carried out in a Pyrolyzer- Gas Chromatograph/Mass Spectrum (Py-GC/MS) reactor. Likewise, d -limonene and polybutadiene rubber (BR), which played important roles in the pyrolysis process of waste tire, has also been pyrolyzed in the Py-GC/MS reactor with these catalysts. Based on the product distribution, the catalytic pyrolysis mechanisms of d -limonene were proposed, while those of BR were extended. With these mechanisms, the catalytic pyrolysis characteristics of waste tire could be explained reasonably. Results showed that HY promoted a dramatic increase of aromatics from pyrolysis of d -limonene and BR, leading to the considerable growth of aromatics in the degraded products of waste tire. The shape selectivity of HZ to mono-cyclic aromatics performed effectively in the pyrolysis of BR, yet it exhibited a weak performance in the pyrolysis of d -limonene. As a result, upon the catalytic pyrolysis of waste tire, HZ was inferior to HY in the aromatization ability. However, the selectivity of HZ to BTXE (benzene, toluene, xylene and ethylbenzene) was superior to that of HY. PA performed a weaker catalytic ability in promoting the production of aromatics during the pyrolysis of d -limonene, BR and waste tire.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Jie Huang,Xuhua Ye,Wenjun Li,Anqi Shi,Xini Chu,Ziwen Cao,Chao Yao,Xiazhang Li
Developing low cost and efficient strategy to eliminate volatile organic compounds (VOCs) are quite urgent and challenging. Herein, CeO 2 nanoparticles co-doped with Yb 3+ and Er 3+ were immobilized on attapulgite clay (ATP) for photothermal catalytic oxidation of toluene. The CeO 2 :Yb 3+ , Er 3+ /ATP exhibited outstanding catalytic activity with low T 90 of 295 °C (temperature at 90% degradation), satisfactory stability and highly water resistance. The enhanced photothermal catalytic performance can be attributed to the optimal introduction of Yb 3+ and Er 3+ , which promoted the up-conversion of near-infrared light (NIR) to visible light increasing the light utilization. The defects caused by Yb 3+ /Er 3+ doping facilitated the adsorption of O 2 , while the active oxygen species generated from the defects and the photoinduced reactive species not only favored the oxidation of toluene in photothermal catalytic process, but also accelerated the reoxidation of reduced catalyst. Notably ATP support provided large specific surface area and abundant adsorption sites for toluene molecules to promote the deep oxidation and hindered the deactivation of catalysts caused by the accumulation of intermediates. In-situ DRIFTS test revealed that the alkoxide and benzoate appeared as the main intermediates, which can be deeply oxidized under light irradiation. Current work provides a new alternative for photothermal catalytic degradation of VOCs.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Water
·
2024
·Vol. 16
·期 22
·3233
·
IF 3
Chun-Yan Lin,Wenliang Wu,Wenya Shao
Phosphorus removal is critical for effective water treatment and the prevention of eutrophication. This study focuses on the modification of attapulgite, an economical clay material, with zirconium (Zr@ATP) to enhance its phosphorus adsorption capacity. Zr@ATP was comprehensively characterized, and its phosphorus-removal mechanisms were investigated. Additionally, its performance in water treatment was evaluated using a lake water-sediment system. Zr@ATP exhibited a high surface area of 329.29 m2/g. The static adsorption experiments revealed that Zr@ATP achieved a phosphorus-removal efficiency of 95.8% at an adsorbent dosage of 5 g/L. Kinetic studies indicated that the adsorption followed a pseudo-second-order model, with the primary mechanism being chemisorption via ion exchange. Application of Zr@ATP in a lake water-sediment system resulted in an 83.6% reduction in total phosphorus. The chlorophyll concentration significantly decreased from 32.33 μg/L to 8.56 μg/L, and the algal density decreased by 84.6%, effectively inhibiting algal growth. These results suggest that Zr@ATP is a promising adsorbent for sustainable phosphorus removal and eutrophication control in aquatic environments.
研究领域:
环境科学
·
水处理技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Yunjiao Wang,Peng Liu,Chao Yang,Bin Mu,Aiqin Wang
The rhodamine B-attapulgite/polypyrrole (RhB-ATP/PPy) composites have been prepared by the in situ chemical oxidative polymerization method based on the self-assembly of pyrrole on the surface of the rhodamine B modified ATP (RhB-ATP). The morphologies of the RhB-ATP/PPy composites prepared with different feeding ratio of pyrrole and the RhB-ATP were compared with transmission electron microscope (TEM) technique. The electrochemical behaviors of the RhB-ATP/PPy composites were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge. The results indicated that RhB did effectively improve the electrochemical performance and cycling stability of the RhB-ATP/PPy composite electrode, although RhB showed no obvious effect on the morphology of the nanocomposites . It was attributed to the fact that RhB and ATP provided a more convenient pathway to the charge carrier and RhB made the combination of the ATP and PPy much stronger. The maximum discharge capacity of the composites electrode achieved 587 F g −1 and kept 76% of its original specific capacitance after 500 cycles.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）