Journal of the Taiwan Institute of Chemical Engineers
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2022
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IF 5.477
Yong Pan,Feng Liu,Yong Zhou,Chen Zhu,Haixia Pang,Baoming Xu
Background Phosphorus in wastewater is a major environmental concern. Very small phosphorus inputs in the environment can cause algal blooms that can deplete the dissolved oxygen and decrease the water quality, leading to eutrophication. Furthermore, some algal blooms produce toxins and bacterial growth that can cause human illness through exposure to contaminated water. Therefore, It is necessary to remove phosphorus before it is discharged to the environment. Methods adsorbent enhanced adsorptive ultrafiltration (UF) has recently emerged as an advanced ion recovery technology with membrane filtration function and adsorption function, and is very effective in removing cationic bisphosphate and anionic phosphate. Significant findings Herein, a novel defect-rich and covalently-crosslinked octanoic acid (OA)-UiO-66(Zr)-NH 2 /PVC adsorption ultrafiltration membrane are designed for removal of phosphate ions in water. The OA-UiO-66-NH 2 /PVC-33 membrane achieved the adsorption capacity (∼30 mgg −1 ) and higher removal efficiency (∼90%). The OA-UiO-66(Zr)-NH 2 /PVC ultrafiltration membrane exhibited a higher water flux of 266.9 L/(m 2 ·h·bar) compared to those of pristine PVC and UiO-66-NH 2 /PVC. Filtration and cyclic stability experiments reveal that OA-UiO-66(Zr)-NH 2 /PVC membrane can maintain a high retention capacity and exhibit excellent regeneration performance after 5 cycles.
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
ADSORPTION SCIENCE & TECHNOLOGY
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2016
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IF 0.633
Jing-Hua Yang,Xiao-Mao Zhou,Yu-Ping Zhang,Jun Chen,Hai-Weng Ma
In this paper, a novel polymerized fiber doped with metal–organic frameworks (UIO-66(Zr)-NH2) was developed in a capillary by microwave irradiation. The fiber was successfully prepared using 4-vinyl pyridine as the monomer and ethylene glycol dimethacrylate as the cross-linker to reinforce its durability. The resultant fiber was applied to extract sulfonylurea herbicides from environmental soil and water samples before analysis with high-performance liquid chromatography. The optimization of different parameters affecting solid-phase microextraction procedure was carried out. Under the optimum experimental conditions, the extraction capability of the hybrid fiber was two times greater than that of the polymer fiber without UIO-66(Zr)-NH2.The proposed hybrid fiber extraction method exhibited low detection limits (0.19–1.79 µg/l), good precision (<12.0%), and wide linear range (10–700 µg/l). Satisfactory recoveries of sulfonylurea herbicides were obtained with spiked soil and water samples in the range of 75.7–94.2 and 82.2–95.3%, respectively.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Boyu Tan,Ruoyu Yuan,Xiaopei Xie,Youxiao Qi,Zihan Qi,Xinxing Wang
Electrochemical sensing has unique advantages in developing on-site and online detection technologies for heavy metal ions (HMIs) due to its fast response, simple operation, high sensitivity, and portable instruments. The vigorous development of modern micro/nanomaterial preparation technology has provided greater space for improving the performance of electrochemical sensing platforms. In this work, a novel hetero-shelled hollow structure metal–organic framework (MOF) hybrid material (denoted as HCZ@UN) was prepared by adopting the hollow carbonized ZIF-8 (HCZ) as the substrate for growing UiO-66(Zr)–NH 2 (UN), and subsequently used for efficient electrochemical detection of lead ions (Pb 2+ ). The grown UN crystal particles were anchored on the HCZ hollow cages and showed nanometer size. The unique shell structure and nanometer size of UN created large specific surface area and rich accessible adsorption sites, which promoted the preconcentration of Pb 2+ . While the hollow carbon polyhedron structure of HCZ improved the dispersibility of UN and electron transfer ability of the material. These factors synergistically improved the detection sensitivity and sensing performance for Pb 2+ determination with a wide linear range of 0.100–500 nM, a low detection limit of 0.0492 ± 0.00523 nM as well as good selectivity, repeatability and long-term stability. This paper provides a simple and effective method for the preparation of electroactive MOF functional materials, which is expected to inspire more interest in building other MOF-based materials with unique structure, high-performance and extensive application value.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Xiaoxuan Lou,Fangke Zhi,Xiaoyuan Sun,Fang Wang,Xiaohong Hou,Chongning Lv,Qi Hu
Laccase, as an environmentally friendly biocatalyst with high catalytic efficiency and less by-product, has huge potential in the field of biodegradation and attracted extensive attention. However, the substrates range of laccase was limited by its low redox potential. The involvement of redox mediators which are called the laccase-mediator system (LMS) can expand the substrate range of laccase to non-phenolic substances and improve its degradation efficiency. Herein, a co-immobilized method with practical application possibilities of laccase and 2,2-Azino-bis-3-ethylbenzothiazoline-6-sulfonic Acid (ABTS) was developed for the treatment of dyes that could not be directly degraded by laccase in wastewater. An amino-functionalized metal–organic framework (MOF), UiO-66(Zr)–NH 2 , was grown in situ on polyethylene terephthalate (PET) using a hydrothermal method, and the obtained composites were acted as the carrier of laccase. Laccase was covalently immobilized on the PET/UiO-66(Zr)–NH 2 , and then ABTS was fixed to the pores of the UiO-66(Zr)–NH 2 by adsorption, realizing the co-immobilization of ABTS and laccase, named PET/ABTS@UiO-66(Zr)–NH 2 /Lac. PET/UiO-66(Zr)–NH 2 /Lac enhanced the pH stability of free laccase under acidic conditions, and also has a higher affinity for substrate and great recyclability. The resultant lamellar biocatalyst (PET/ABTS@UiO-66(Zr)–NH 2 /Lac) was used in the degradation of crystal violet (CV), and the CV removal was increased from 8.61% (free laccase) to 58.80% in 24 h. The removal of malachite green (MG), alizarin green (AG), and methyl orange (MO) was up to 64.82%, 61.61%, and 21.12%, respectively. The laccase and ABTS could be recycled synchronously, which avoided the loss of activity of the system. This work provides a navigation reference for the co-immobilization of LMS by MOFs.
研究领域:
环境科学
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生物技术
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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）