Template-free Synthesis of Large-Pore-Size Porous Magnesium Silicate Hierarchical Nanostructures for High-Efficiency Removal of Heavy Metal Ions

2017 ◽  
Vol 5 (3) ◽  
pp. 2774-2780 ◽  
Author(s):  
Renyao Huang ◽  
Minjie Wu ◽  
Tao Zhang ◽  
Dianqing Li ◽  
Pinggui Tang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Pore Size ◽  
Heavy Metal Ions ◽  
High Efficiency ◽  
Magnesium Silicate ◽  
Hierarchical Nanostructures ◽  
Template Free ◽  
Porous Magnesium ◽  
Large Pore Size

Effect of large pore size of multifunctional mesoporous microsphere on removal of heavy metal ions

2013 ◽  
Vol 254-255 ◽  
pp. 157-165 ◽  
Author(s):  
Qing Yuan ◽  
Nan Li ◽  
Yue Chi ◽  
Wangchang Geng ◽  
Wenfu Yan ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Pore Size ◽  
Heavy Metal Ions ◽  
Large Pore ◽  
Large Pore Size

Functionalized calcium silicate nanofibers with hierarchical structure derived from oyster shells and their application in heavy metal ions removal

2016 ◽  
Vol 18 (23) ◽  
pp. 15564-15573 ◽  
Author(s):  
Weijie You ◽  
Mingzhu Hong ◽  
HaiFeng Zhang ◽  
Qiuping Wu ◽  
Zanyong Zhuang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Hierarchical Structure ◽  
Calcium Silicate ◽  
Heavy Metal Ions ◽  
Hierarchical Nanostructures ◽  
Potential Applications ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Inorganic hierarchical nanostructures have remarkable potential applications in environmental metal remediation; however, their applications usually suffer from low capacity, high cost, and difficulties in the recycling of adsorbents.

scholarly journals Novel Mixed Matrix Membranes Based on Polymer of Intrinsic Microporosity PIM-1 Modified with Metal-Organic Frameworks for Removal of Heavy Metal Ions and Food Dyes by Nanofiltration

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 14
Author(s):  
Anna Kuzminova ◽  
Mariia Dmitrenko ◽  
Andrey Zolotarev ◽  
Aleksandra Korniak ◽  
Daria Poloneeva ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Efficiency ◽  
Metal Organic Frameworks ◽  
Mixed Matrix Membranes ◽  
Polymer Of Intrinsic Microporosity ◽  
Food Dyes ◽  
Metal Organic ◽  
Intrinsic Microporosity

Nowadays, nanofiltration is widely used for water treatment due to its advantages, such as energy-saving, sustainability, high efficiency, and compact equipment. In the present work, novel nanofiltration membranes based on the polymer of intrinsic microporosity PIM-1 modified by metal-organic frameworks (MOFs)—MIL-140A and MIL-125—were developed to increase nanofiltration efficiency for the removal of heavy metal ions and dyes. The structural and physicochemical properties of the developed PIM-1 and PIM-1/MOFs membranes were studied by the spectroscopic technique (FTIR), microscopic methods (SEM and AFM), and contact angle measurement. Transport properties of the developed PIM-1 and PIM-1/MOFs membranes were evaluated in the nanofiltration of the model and real mixtures containing food dyes and heavy metal ions. It was found that the introduction of MOFs (MIL-140A and MIL-125) led to an increase in membrane permeability. It was demonstrated that the membranes could be used to remove and concentrate the food dyes and heavy metal ions from model and real mixtures.

In situ growth of monodispersed Fe3O4 nanoparticles on graphene for the removal of heavy metals and aromatic compounds

2013 ◽  
Vol 68 (11) ◽  
pp. 2351-2358 ◽  
Author(s):  
Hai-Xia Wu ◽  
Jia-Wei Wu ◽  
Zhi-Gang Niu ◽  
Xiu-Li Shang ◽  
Jun Jin
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Aromatic Compounds ◽  
Heavy Metal Ions ◽  
High Efficiency ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Removal Of Heavy Metals

We report on the efficient removal of heavy metal ions and aromatic compounds from simulated wastewater with a nanocomposite. The nanocomposite was obtained via thermal decomposition of the precursor Fe(acac)3 onto the surface of graphene, modified by diethylenetriamine pentaacetic anhydride through dopamine. It was found that the maximum adsorption capacity of the nanocomposite toward Cu2+ and naphthalene was 207.9 and 72.2 mg g−1 respectively, displaying a high efficiency for the removal of heavy metal ions as well as aromatic compounds at pH 7.0 and 293 K. The Langmuir for naphthalene and the Freundlich for the Cu2+ adsorption isotherms were applicable for describing the removal processes. Furthermore, the nanocomposite was carefully examined by transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Raman spectra, and UV-vis spectroscopy. This work provides a very efficient, fast and convenient approach to exploring a promising nanocomposite for water treatment.

Flower-Like α-Fe2O3 for Removal of Heavy Metals from Wastewater

2020 ◽  
Vol 20 (11) ◽  
pp. 6753-6759
Author(s):  
Bulgan Tsedenbal ◽  
Ji Eun Lee ◽  
Min Soo Kim ◽  
Seok Hwan Huh ◽  
Bon Heun Koo
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Efficiency ◽  
Adsorption Equilibrium ◽  
Freundlich Isotherm ◽  
Average Particle ◽  
Equilibrium Study ◽  
Removal Of Heavy Metals ◽  
Equilibrium Data

In the present work flower-like, α-Fe2O3 were synthesized by ethylene-glycol mediated polyol method. The synthesized flower-like, α-Fe2O3 were separated cadmium (Cd2+) chromium (Cr6+) and lead ions (Pb2+) from wastewater. XRD pattern and FESEM images show the obtained sample is pure hematite and flower-like nanostructures average particle sizes 4.0 μm. The BET specific surface area was 47.55 m2g−1. Adsorption experiments were investigated the adsorbent dose, influence pH of the metal ions, sorption times and initial concentrations of heavy metal ions. High efficiency of Cd2+, Cr6+ and Pb2+ removal occurred at pH 7.0, 3.0 and 5.5, respectively. The adsorption equilibrium study showed that the heavy metal ions adsorption of flowers like α-Fe2O3 followed a Langmuir and Freundlich isotherm model. The heavy metal ions adsorption equilibrium data were followed to the Langmuir model. The maximum adsorption capacities were 16.95, 22.22 and 25.64 mg g−1 for Cd2+, Cr6+ and Pb2+ ions respectively. This work determines that the synthesized flower-like α-Fe2O3 is proposed as an efficient nano-adsorbent for wastewater treatment.

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