Fabrication of Hydrazone-Linked Covalent Organic Frameworks Using Alkyl Amine as Building Block for High Adsorption Capacity of Metal Ions

2019 ◽  
Vol 11 (12) ◽  
pp. 11706-11714 ◽  
Author(s):  
Ya Li ◽  
Chang Wang ◽  
Shujuan Ma ◽  
Haiyang Zhang ◽  
Junjie Ou ◽  
...  
Keyword(s):  
Metal Ions ◽  
Adsorption Capacity ◽  
Building Block ◽  
Covalent Organic Frameworks ◽  
High Adsorption ◽  
Alkyl Amine ◽  
High Adsorption Capacity

Rapid capture of trace precious metals by amyloid-like protein membrane with high adsorption capacity and selectivity

2020 ◽  
Vol 8 (6) ◽  
pp. 3438-3449 ◽  
Author(s):  
Facui Yang ◽  
Zhigang Yan ◽  
Jian Zhao ◽  
Shuting Miao ◽  
Dong Wang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Adsorption Capacity ◽  
Precious Metal ◽  
Precious Metals ◽  
Bilayer Membrane ◽  
High Adsorption ◽  
Protein Membrane ◽  
High Adsorption Capacity ◽  
Precious Metal Ions

A protein-based bilayer membrane can selectively sequester precious metal ions from leaching solutions of ores and WEEE, and exhibits an adsorption capacity for gold of 1034.4 mg g−1.

scholarly journals Preparation of PVDF/Hyperbranched-Nano-Palygorskite Composite Membrane for Efficient Removal of Heavy Metal Ions

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 156 ◽  
Author(s):  
Xiaoye Zhang ◽  
Yingxi Qin ◽  
Guifang Zhang ◽  
Yiping Zhao ◽  
Chao Lv ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Composite Membrane ◽  
Heavy Metal Ions ◽  
Thermo Gravimetric Analysis ◽  
Composite Membranes ◽  
Gravimetric Analysis ◽  
High Adsorption ◽  
High Adsorption Capacity

In this work, three kinds of hyperbranched polyamidoamine-palygorskite (PAMAM-Pal) were designed and synthesized by grafting the first generation polyamidoamine (G1.0 PAMAM), G2.0 PAMAM and G3.0 PAMAM onto Pal surfaces, respectively. Then, these PAMAM-Pals were used as additives to prepare polyvinylidene fluoride (PVDF)/hyperbranched polyamidoamine-palygorskite bicomponent composite membranes. The structures of the composite membranes were characterized by Fourier transform infrared spectroscopy (FTIR), thermo gravimetric analysis (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electronmicroscopy (SEM), atomic force microscope (AFM) and Thermogravimetric analysis (TGA). The adsorption properties of composite membranes to heavy metal ions was studied, and the results found that the maximum adsorption capacities for Cu(II), Ni(II) and Cd(II) could reach 155.19 mg/g, 124.28 mg/g and 125.55 mg/g, respectively, for the PVDF/G3.0 PAMAM-Pal membrane, while only 23.70 mg/g, 17.74 mg/g and 14.87 mg/g could be obtained for unmodified membranes in the same conditions. The high adsorption capacity can be ascribed to the large number of amine-terminated groups, amide groups and carbonyl groups of the composite membrane. The above results indicated that the prepared composite membrane has a high adsorption capacity for heavy metal ions removal in water treatment.

Preparation of Metal Ions Adsorbent with High Adsorption Capacity by Coupling Glycine to Sepharose 4B

2012 ◽  
Vol 487 ◽  
pp. 11-14
Author(s):  
Zong Hua Qin ◽  
Han Ning Cai ◽  
Ren Qiang Li
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Good Stability ◽  
Carboxyl Group ◽  
High Adsorption ◽  
Coupling Rate ◽  
High Adsorption Capacity ◽  
Sepharose 4B

After Sepharose 4B polymer beads were activated by using epichlorohydrin, glycine was binded with them to prepare an immobilized carboxyl group ion exchange adsorbent. The coupling rate was that 18.3 mg Gly could be fixed by 1 g of wet Sepharose 4B beads. At pH 9, this adsorbent showed power adsorption to metal ions with Ca2+16.49 mg，Mg2+6.92 mg，Fe2+11.06 mg，Fe3+4.98 mg and Mn2+11.84 mg were respectively adsorbed by 20 g of wet Sepharose 4B beads during saturated adsorption. Moreover, this absorbent possessed the properties with good stability, regeneration easily and low cost.

Covalent Organic Frameworks Constructed from Flexible Building Blocks with High Adsorption Capacity for Pollutants

2018 ◽  
Vol 1 (9) ◽  
pp. 4756-4761 ◽  
Author(s):  
Yang Li ◽  
Weiben Chen ◽  
Wenjing Hao ◽  
Yusen Li ◽  
Long Chen
Keyword(s):  
Adsorption Capacity ◽  
Building Blocks ◽  
Covalent Organic Frameworks ◽  
High Adsorption ◽  
High Adsorption Capacity

A knot-linker planarity control strategy for constructing highly crystalline cationic covalent organic frameworks: decoding the effect of crystallinity on adsorption performance

2020 ◽  
Vol 8 (25) ◽  
pp. 12657-12664 ◽  
Author(s):  
Hong-Ju Da ◽  
Cheng-Xiong Yang ◽  
Hai-Long Qian ◽  
Xiu-Ping Yan
Keyword(s):  
Adsorption Capacity ◽  
Control Strategy ◽  
Covalent Organic Frameworks ◽  
High Adsorption ◽  
Adsorption Performance ◽  
High Adsorption Capacity ◽  
Fast Removal

A knot-linker planarity control strategy was developed to construct highly crystalline cationic covalent organic frameworks with C3-symmetric guanidine units for fast removal of 2,4-dichlorophenol with high adsorption capacity.

Fe3O4/PANI/MnO2 core–shell hybrids as advanced adsorbents for heavy metal ions

2017 ◽  
Vol 5 (8) ◽  
pp. 4058-4066 ◽  
Author(s):  
Jian Zhang ◽  
Jie Han ◽  
Minggui Wang ◽  
Rong Guo
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Heavy Metal Ions ◽  
Core Shell ◽  
High Adsorption ◽  
Magnetic Adsorbents ◽  
Solution Route ◽  
High Adsorption Capacity

Multifunctional magnetic adsorbents of Fe3O4/PANI/MnO2 core–shell hybrids have been developed through a facile and economic solution route, which show high adsorption capacity toward heavy metal ions.

Mercury Removal from Wastewater by Steamed Hoof Powder

1999 ◽  
Vol 40 (7) ◽  
pp. 109-116 ◽  
Author(s):  
M. H. Ansari ◽  
A. M. Deshkar ◽  
P. S. Kelkar ◽  
D. M. Dharmadhikari ◽  
M. Z. Hasan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Light Metal ◽  
Mercury Removal ◽  
High Adsorption ◽  
Surface Sites ◽  
Ph Values ◽  
High Adsorption Capacity

Steamed Hoof Powder (SHP), size < 53μ, was observed to have high adsorption capacity for Hg(II) with >95% removal from a solution containing 100 mg/L of Hg(II) with only 0.1% (W/V) concentration of SHP. The SHP has good settling properties and gives clear and odour free effluent. Studies indicate that pH values between 2 and 10 have no effect on the adsorption of Hg(II) on SHP. Light metal ions like Na+, K+, Ca2+ and Mg2+ up to concentrations of 500 mg/L and heavy metals like Cu2+, Zn2+, Cd2+, Co2+, Pb2+, Ni2+, Mn2+, Cr3+, Cr6+, Fe2+ and Fe3+ up to concentrations of 100 mg/L do not interfere with the adsorption process. Anions like sulphate, acetate and phosphate up to concentrations of 200 mg/L do not interfere. Chloride interferes in the adsorption process when Hg(II) concentration is above 9.7 mg/L. The adsorption equilibrium was established within two hours. Studies indicate that adsorption occurs on the surface sites of the adsorbent.

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