Dynamic adsorption behaviors between Cu2+ ion and water-insoluble amphoteric starch in aqueous solutions

2001 ◽  
Vol 81 (12) ◽  
pp. 2849-2855 ◽  
Author(s):  
Wu-Chung Chan ◽  
Jun-Yi Wu
Keyword(s):  
Aqueous Solutions ◽  
Dynamic Adsorption ◽  
Adsorption Behaviors ◽  
Amphoteric Starch

Kinetics and thermodynamics of the sorption of furaltadone from aqueous solutions on magnetic multi-walled carbon nanotubes

2014 ◽  
Vol 70 (6) ◽  
pp. 964-971
Author(s):  
Xu Chen ◽  
Zhen-hu Xiong
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Sorption Data ◽  
Multi Wall Carbon Nanotubes ◽  
Adsorption Behaviors ◽  
Different Temperatures ◽  
Multi Walled Carbon Nanotubes ◽  
Pseudo Second Order ◽  
Experimental Data Analysis ◽  
Walled Carbon Nanotubes

Magnetic multi-wall carbon nanotubes (M-MWCNTs) were used as an adsorbent for removal of furaltadone from aqueous solutions, and the adsorption behaviors were investigated by varying pH, sorbent amount, sorption time and temperature. The results showed that the adsorption efficiency of furaltadone reached 97% when the dosage of M-MWCNT was 0.45 g · L−1, the pH was 7 and the adsorption time was 150 min. The kinetic data showed that the pseudo-second-order model can fit the adsorption kinetics. The sorption data could be well explained by the Langmuir model under different temperatures. The adsorption process was influenced by both intraparticle diffusion and external mass transfer. The experimental data analysis indicated that the electrostatic attraction and π–π stacking interactions between M-MWCNT and furaltadone might be the adsorption mechanism. Thermodynamic analysis reflected that adsorption of furaltadone on the M-MWCNT was spontaneous and exothermic. Our study showed that M-MWCNTs can be used as a potential adsorbent for removal of furaltadone from water and wastewater.

scholarly journals Cyclodextrin modified filter paper for removal of cationic dyes/Cu ions from aqueous solutions

2018 ◽  
Vol 78 (12) ◽  
pp. 2553-2563 ◽  
Author(s):  
Yaoyue Li ◽  
Yanbo Zhou ◽  
Yi Zhou ◽  
Juying Lei ◽  
Shengyan Pu
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Filter Paper ◽  
Textile Industry ◽  
High Efficiency ◽  
National Standard ◽  
Esterification Reaction ◽  
Dynamic Adsorption ◽  
Pseudo Second Order ◽  
Cu Ions

Abstract A filter paper was functionalized with β-cyclodextrin and citric acid via esterification reaction for the removal of dyes and Cu ions from aqueous solutions. The adsorption capacity and removal performance of the modified filter paper (MFP) was investigated using static and dynamic adsorption experiments. The static adsorption data fit well the Langmuir and pseudo-second-order models, and the adsorption capacity of Methylene Blue (MB), Brilliant Green (BG), Rhodamine-B (RB) and Cu(II) over the MFP were 124.6 mg/g, 130.4 mg/g, 99.7 mg/g and 39.1 mg/g, respectively, which are much higher than the unmodified filter paper (below 2 mg/g). Even better, the decolorization performance and Cu(II) removal of MFP are remarkable in dynamic adsorption. The effluent can reach the National Standard for dyeing and finishing of textile industry of China after three cycles in a continuous filtration-adsorption system. This method provides a new pathway to achieve high efficiency removal of dyes and metal ions from wastewater.

Wool-derived keratin nanofiber membranes for dynamic adsorption of heavy-metal ions from aqueous solutions

2012 ◽  
Vol 83 (15) ◽  
pp. 1574-1586 ◽  
Author(s):  
Annalisa Aluigi ◽  
Alessandro Corbellini ◽  
Fabio Rombaldoni ◽  
Giorgio Mazzuchetti
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Dynamic Adsorption ◽  
Nanofiber Membranes

Facile crosslinking synthesis of hyperbranch-substrate nanonetwork magnetite nanocomposite for the fast and highly efficient removal of lead ions and anionic dyes from aqueous solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 67057-67071 ◽  
Author(s):  
Mingqiang Liu ◽  
Baochang Zhang ◽  
Huicai Wang ◽  
Fei Zhao ◽  
Yuan Chen ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Functional Group ◽  
Lead Ions ◽  
Surface Functional Group ◽  
Efficient Removal ◽  
Anionic Dyes ◽  
Highly Efficient ◽  
Adsorption Behaviors ◽  
Group Density ◽  
Effect Of Surface

The aim of the present work was to investigate the effect of surface functional group density on the adsorption behaviors of functionalized mesoporous Fe3O4.

α-Crystalline polyantimonic acid - an adsorbent for radiostrontium, and a potential primary barrier in waste repositories

2001 ◽  
Vol 89 (11-12) ◽  
Author(s):  
A. Bilewicz ◽  
J. Narbutt
Keyword(s):  
Portland Cement ◽  
Aqueous Solutions ◽  
Nuclear Waste ◽  
Flow Rate ◽  
Chelating Agents ◽  
Dynamic Adsorption ◽  
Liquid Radioactive Wastes ◽  
Polyantimonic Acid ◽  
The Matrix ◽  
Waste Repositories

Dynamic adsorption of radiostrontium was studied on α-crystalline polyantimonic acid grains from aqueous solutions containing common components of liquid radioactive wastes - salts and chelating agents at moderate concentrations. Effective decontamination of the neutral solutions has been achieved, in the amounts of a few thousand bed volumes, depending on the flow rate through the column. After encapsulation in the matrix of Portland cement, the loaded adsorbent can serve as an effective primary barrier in nuclear waste repositories.

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