Efficient and highly selective adsorption of cationic dyes and removal of ciprofloxacin antibiotic by surface modified nickel sulfide nanomaterials: Kinetics, isotherm and adsorption mechanism

2020 ◽  
Vol 586 ◽  
pp. 124264 ◽  
Author(s):  
Sunita Kumari ◽  
Afaq Ahmad Khan ◽  
Arif Chowdhury ◽  
Arvind K. Bhakta ◽  
Zineb Mekhalif ◽  
...  
Keyword(s):  
Nickel Sulfide ◽  
Adsorption Mechanism ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Surface Modified

scholarly journals Effects of Electronegativity and Hydration Energy on the Selective Adsorption of Heavy Metal Ions by Synthetic NaX Zeolite

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4066
Author(s):  
Xianyuan Fan ◽  
Hong Liu ◽  
Emmanuella Anang ◽  
Dajun Ren
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Heavy Metal Ions ◽  
Binary Systems ◽  
Adsorption Mechanism ◽  
Selective Adsorption ◽  
Hydration Energy ◽  
Nax Zeolite ◽  
High Electronegativity

The adsorption capacity of synthetic NaX zeolite for Pb2+, Cd2+, Cu2+ and Zn2+ in single and multi-component systems were investigated. The effects of electronegativity and hydration energy on the selective adsorption, as well as potential selective adsorption mechanism of the NaX zeolite for Pb2+, Cd2+, Cu2+ and Zn2+ were also discussed. The maximum adsorption capacity order of the heavy metals in the single system was Pb2+ > Cd2+ > Cu2+ > Zn2+, and this could be related to their hydration energy and electronegativity. The values of the separation factors (α) and affinity constant (KEL) in different binary systems indicated that Pb2+ was preferentially adsorbed, and Zn2+ presented the lowest affinity for NaX zeolite. The selective adsorption capacities of the metals were in the order, Pb2+ > Cd2+ ≈ Cu2+ > Zn2+. The trend for the selective adsorption of NaX zeolite in ternary and quaternary systems was consistent with that in the binary systems. Pb2+ and Cu2+ reduced the stability of the Si-O-Al bonds and the double six-membered rings in the NaX framework, due to the high electronegativity of Pb2+ and Cu2+ than that of Al3+. The selective adsorption mechanism of NaX zeolite for the high electronegative metal ions could mainly result from the negatively charged O in the Si-O-Al structure of the NaX zeolite, hence heavy metal ions with high electronegativity display a strong affinity for the electron cloud of the oxygen atoms in the Si-O-Al. This study could evaluate the application and efficiency of zeolite in separating and recovering certain metal ions from industrial wastewater.

scholarly journals Cationic dyes immobilized on cellulose acetate surface modified with titanium dioxide: factorial design and an application as sensor for NADH

2007 ◽  
Vol 18 (8) ◽  
pp. 1462-1472 ◽  
Author(s):  
Andrea A. Hoffmann ◽  
Silvio L. P. Dias ◽  
Edilson V. Benvenutti ◽  
Eder C. Lima ◽  
Flávio A. Pavan ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Factorial Design ◽  
Cellulose Acetate ◽  
Cationic Dyes ◽  
Surface Modified

Density functional theory for the selective adsorption of small molecules on a surface modified with polymer brushes

2012 ◽  
Vol 38 (4) ◽  
pp. 274-283 ◽  
Author(s):  
Yuli Xu ◽  
Xueqian Chen ◽  
Houyang Chen ◽  
Shouhong Xu ◽  
Honglai Liu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Small Molecules ◽  
Polymer Brushes ◽  
Density Functional ◽  
Selective Adsorption ◽  
Functional Theory ◽  
Surface Modified

Synthesis of nano-porous Bi 2 WO 6 hierarchical microcrystal with selective adsorption for cationic dyes

2016 ◽  
Vol 83 ◽  
pp. 387-395 ◽  
Author(s):  
Danjun Wang ◽  
Jie Zhang ◽  
Li Guo ◽  
Xinbo Dong ◽  
Huidong Shen ◽  
...  
Keyword(s):  
Selective Adsorption ◽  
Cationic Dyes

Structural tuning of zinc–porphyrin frameworks via auxiliary nitrogen-containing ligands towards selective adsorption of cationic dyes

2019 ◽  
Vol 55 (46) ◽  
pp. 6527-6530 ◽  
Author(s):  
Xiao-Ning Wang ◽  
Jiang-Li Li ◽  
Yu-Meng Zhao ◽  
Jiandong Pang ◽  
Bao Li ◽  
...  
Keyword(s):  
Selective Adsorption ◽  
Cationic Dyes ◽  
Dye Molecules ◽  
Zinc Porphyrin ◽  
Interior Surface

Three novel zinc–porphyrin MOFs have been synthesized by using versatile N-containing ligands. The open Watson–Crick pair in the interior surface in one Zn-MOF has been presented, which could endow the related MOF with excellent selective adsorption of dye molecules.

Functionalized polyoxometalate-based metal–organic cuboctahedra for selective adsorption toward cationic dyes in aqueous solution

2018 ◽  
Vol 47 (37) ◽  
pp. 12979-12983 ◽  
Author(s):  
Ya-Ru Gong ◽  
Wei-Chao Chen ◽  
Liang Zhao ◽  
Kui-Zhan Shao ◽  
Xin-Long Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Carboxylate Ligand ◽  
Metal Organic

Two new VMOPs with cuboctahedral geometries were synthesized based on [V6O6(OCH3)9X] (X = VO4 or SO4) and the rigid tridentate carboxylate ligand H3TATB, which present selective adsorption toward cationic dyes in aqueous solution.

scholarly journals Fabrication of MoO3 Nanowire-based Membrane Devices for the Selective Adsorption of Cationic Dyes from Aqueous Solutions with High Performance and Reusability

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 586 ◽  
Author(s):  
Zhang ◽  
Park
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Aqueous Solutions ◽  
Rhodamine B ◽  
High Performance ◽  
Selective Adsorption ◽  
Treatment Method ◽  
Cationic Dyes ◽  
Adsorption Ability ◽  
Anionic Dye

A series of ultralong (up to tens of micrometers) MoO3 nanowire-based membranes were synthesized for the treatment of aqueous solutions containing the cationic dyes methylene blue (MB) and rhodamine B (RhB). This treatment method possesses extremely rapid and superhigh adsorbability (up to 521 and 321 mg/g for MB and RhB, respectively), as well excellent selective adsorption ability of cationic dyes with respect to the anionic dye methyl orange (MO). Moreover, the cationic dyes on the membrane can be desorbed easily, and reusability is good.

Sign in / Sign up

Export Citation Format

Share Document