Preparation of Crown‐Ether‐Functionalized Polysulfone Membrane by In Situ Surface Grafting for Selective Adsorption and Separation of Li +

2020 ◽  
Vol 5 (11) ◽  
pp. 3321-3329
Author(s):  
Jixue Li ◽  
Hong Yi ◽  
Mingxia Wang ◽  
Feng Yan ◽  
Quanji Zhu ◽  
...  
Keyword(s):  
Crown Ether ◽  
Selective Adsorption ◽  
Surface Grafting ◽  
Polysulfone Membrane

In-situ synthesis of reactive hydroxyapatite nano-crystals for a novel approach of surface grafting polymerization

2007 ◽  
Vol 17 (2) ◽  
pp. 174-180 ◽  
Author(s):  
Sang Cheon Lee ◽  
Hyung Woo Choi ◽  
Hong Jae Lee ◽  
Kyung Ja Kim ◽  
Jeong Ho Chang ◽  
...  
Keyword(s):  
In Situ Synthesis ◽  
Surface Grafting ◽  
Grafting Polymerization ◽  
Novel Approach

scholarly journals Fabrication of a Novel Antifouling Polysulfone Membrane with in Situ Embedment of Mxene Nanosheets

2019 ◽  
Vol 16 (23) ◽  
pp. 4659 ◽  
Author(s):  
Zhen Shen ◽  
Wei Chen ◽  
Hang Xu ◽  
Wen Yang ◽  
Qing Kong ◽  
...  
Keyword(s):  
Contact Angle ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Water Contact Angle ◽  
Bovine Serum ◽  
Composite Membranes ◽  
Recovery Ratio ◽  
Water Contact ◽  
Polysulfone Membrane

Membrane fouling is still a critical issue for the application of ultrafiltration, which has been widely used in water treatment due to its efficiency and simplicity. In order to improve the antifouling property, a new 2D material MXene was used to fabricate composite ultrafiltration membrane with the approach of in situ embedment during the phase inversion process in this study. Scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), water contact angle, bovine serum albumin rejection and porosity measurements were utilized to characterize the prepared membranes. Due to the hydrophilicity of the MXene, the composite membranes obtained higher hydrophilicity, confirmed by the decreased water contact angle. All the modified membranes had a high bovine serum albumin rejection above 90% while that of the pristine polysulfone membrane was 77.48%. The flux recovery ratio and the reversible fouling ratio of the membranes were also improved along with the increasing content of the MXene. Furthermore, the highest flux recovery ratio could also reach 76.1%. These indicated the good antifouling properties of MXene composite membranes. The enhanced water permeability and protein rejection and excellent antifouling properties make MXene a promising material for antifouling membrane modification.

Sol–Gel Derived Benzo-Crown Ether-Functionalized Silica Gel for Selective Adsorption of Ca2+ Ions

2019 ◽  
Vol 64 (4) ◽  
pp. 1378-1384 ◽  
Author(s):  
Nan You ◽  
Yue-Xian Song ◽  
Hai-Rong Wang ◽  
Li-Xia Kang ◽  
Hong-Tao Fan ◽  
...  
Keyword(s):  
Crown Ether ◽  
Silica Gel ◽  
Selective Adsorption ◽  
Sol Gel ◽  
Functionalized Silica

Engineering pH-switchable UiO-66 via in-situ amino acid doping for highly selective adsorption of anionic dyes

2020 ◽  
Vol 395 ◽  
pp. 124958 ◽  
Author(s):  
Ruimeng Wang ◽  
Long Liu ◽  
Sidra Subhan ◽  
Yaseen Muhammad ◽  
Yang Hu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Selective Adsorption ◽  
Anionic Dyes

Enhanced Selective Removal of Cd(II) by an Amino-Functional Water-Retaining Agent Incorporating Nano Hydrous Manganese Oxide

2020 ◽  
Vol 20 (9) ◽  
pp. 5906-5915
Author(s):  
Liang Peng ◽  
Siyan Zhou ◽  
Huijuan Song ◽  
Yahui Yang ◽  
Ming Lei ◽  
...  
Keyword(s):  
Agricultural Soil ◽  
Functional Group ◽  
Selective Adsorption ◽  
Clean Water ◽  
Hydrous Manganese Oxide ◽  
In Situ Fixation ◽  
High Concentrations ◽  
Germination Experiment ◽  
Chelating Effect

An amino-functionalized water-retaining agent (PPM40-NH2) and a water-retaining agent lacking functionalization (PPM40) were prepared to investigate their selective Cd(II) removal properties. The affinity for Cd(II) was increased after introducing the amino functional group. The SFCd/Ca of PPM40-NH2 was 3–7 fold higher than that of PPM40 although the CCa was 100–1000 times higher than that of CCd. The chelating effect of –COOH and –NH2 in PPM40-NH2 corresponded well with the selective adsorption of Cd(II), as confirmed by simulations. A seed germination experiment demonstrated that PPM40-NH2 could act as a filter of heavy metals to supply “clean” water for the roots of the pakchoi plant. The leaching experiment indicated that PPM40-NH2 is an efficient in situ fixation agent for the remediation of agricultural soil contaminated with Cd(II) in the presence of high concentrations of Ca(II) salts.

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