Modified chitosan gel incorporated with magnetic nanoparticle for removal of Cu(II) and Cr(VI) from aqueous solution

2019 ◽  
Vol 133 ◽  
pp. 1051-1062 ◽  
Author(s):  
S.M. Anush ◽  
B. Vishalakshi
Keyword(s):  
Aqueous Solution ◽  
Magnetic Nanoparticle ◽  
Modified Chitosan ◽  
Chitosan Gel

A self-healing and multi-responsive hydrogel based on biodegradable ferrocene-modified chitosan

RSC Advances ◽  
2014 ◽  
Vol 4 (98) ◽  
pp. 55133-55138 ◽  
Author(s):  
Ya-Kun Li ◽  
Cheng-Gong Guo ◽  
Liang Wang ◽  
Youqian Xu ◽  
Chen-yang Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
The Self ◽  
Self Healing ◽  
Modified Chitosan ◽  
Acid Aqueous Solution ◽  
External Stimuli

Here, we present a novel and facile method for constructing a self-healing hydrogel with multi-responses to external stimuli via the self-assemble of biodegradable ferrocene-modified chitosan (FcCS) in an acid aqueous solution.

Synthesis of Modified Chitosan Gel Beads and Adsorption Performance of Cu(II)

2020 ◽  
Vol 231 (6) ◽  
Author(s):  
Shan Liu ◽  
Xuanni Li ◽  
Tao Li ◽  
Lei Liao ◽  
Lei Cao ◽  
...  
Keyword(s):  
Modified Chitosan ◽  
Adsorption Performance ◽  
Gel Beads ◽  
Chitosan Gel

Competitive adsorption of acid dyes from aqueous solution on diethylenetriamine-modified chitosan beads

2014 ◽  
Vol 131 (23) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yikai Yan ◽  
Bo Xiang ◽  
Xiaowei Yi ◽  
Yijiu Li ◽  
Qian Jia
Keyword(s):  
Aqueous Solution ◽  
Competitive Adsorption ◽  
Acid Dyes ◽  
Chitosan Beads ◽  
Modified Chitosan

Sorption behaviour of copper on chemically modified chitosan beads from aqueous solution

2011 ◽  
Vol 83 (3) ◽  
pp. 1082-1087 ◽  
Author(s):  
Muniyappan Rajiv Gandhi ◽  
G.N. Kousalya ◽  
Natrayasamy Viswanathan ◽  
S. Meenakshi
Keyword(s):  
Aqueous Solution ◽  
Chitosan Beads ◽  
Sorption Behaviour ◽  
Modified Chitosan ◽  
Chemically Modified

Removal of Pb(II) from aqueous solution using dithiocarbamate modified chitosan beads with Pb(II) as imprinted ions

2013 ◽  
Vol 220 ◽  
pp. 412-419 ◽  
Author(s):  
Bingjie Liu ◽  
Xin Lv ◽  
Xianghong Meng ◽  
Guangli Yu ◽  
Dongfeng Wang
Keyword(s):  
Aqueous Solution ◽  
Chitosan Beads ◽  
Modified Chitosan

scholarly journals Preparation and application of polyethyleneimine-modified corncob magnetic gel for removal of Pb(ii) and Cu(ii) ions from aqueous solution

RSC Advances ◽  
2022 ◽  
Vol 12 (4) ◽  
pp. 1950-1960
Author(s):  
Zhi Chen ◽  
Jun Zeng ◽  
Zhi-Bo Zhang ◽  
Zhi-Jie Zhang ◽  
Shan Ma ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Adsorption Properties ◽  
Cross Linking ◽  
Modified Chitosan

A kind of magnetic gel material was synthesized by cross-linking PEI modified chitosan and corncob biomass with good adsorption properties of heavy metal ions.

scholarly journals The effective Ni(II) removal of red mud modified chitosan from aqueous solution

2021 ◽  
Author(s):  
Thi-Thuy Luu ◽  
Duy-Khoi Nguyen ◽  
Tu Thi Phuong Nguyen ◽  
Thien-Hoang Ho ◽  
Van-Phuc Dinh ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Kinetic Model ◽  
Red Mud ◽  
Contact Time ◽  
Uptake Capacity ◽  
First Order ◽  
Modified Chitosan ◽  
Effects Of Ph ◽  
Pseudo Second Order ◽  
Pseudo First Order

Abstract To remove Ni(II) ions from an aqueous solution, researchers used red mud modified by chitosan (RM/CS) material as a new adsorbent. According to the findings, the surface area of red mud is nearly doubled after being treated with chitosan, from 68.6 m2/g to 105.7 m2/g. The effects of pH solution, contact time, and material dosage on the Ni(II) uptake were examined. In comparison with the pseudo-first-order and pseudo-second-order models, the intra-diffusion model was the most suitable kinetic model for the Ni(II) removal. Besides, the three-parameter Sips model was used to predict the Ni(II) adsorption of RM/CS from aqueous solution. Furthermore, the Langmuir maximum Ni(II) uptake capacity of this material was 31.66 mg/g at 323K, which was higher than red mud and several other natural materials. Notably, thermodynamic investigations demonstrated that Ni(II) adsorption on RM/CS is both exothermic and physic.

scholarly journals Kinetics, Isotherm and Thermodynamic Studies for Efficient Adsorption of Congo Red Dye from Aqueous Solution onto Novel Cyanoguanidine-Modified Chitosan Adsorbent

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4446
Author(s):  
Nouf F. Al-Harby ◽  
Ebtehal F. Albahly ◽  
Nadia A. Mohamed
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Adsorption Process ◽  
Ph Value ◽  
Dye Adsorption ◽  
Order Kinetic ◽  
Amino Groups ◽  
Solution Ph ◽  
Intraparticle Diffusion Model ◽  
Modified Chitosan

Novel Cyanoguanidine-modified chitosan (CCs) adsorbent was successfully prepared via a four-step procedure; first by protection of the amino groups of chitosan, second by insertion of epoxide rings, third by opening the latter with cyanoguanidine, and fourth by restoring the amino groups through elimination of the protection. Its structure and morphology were checked using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The adsorption capacity of CCs for Congo Red (CR) dye was studied under various conditions. It decreased significantly with the increase in the solution pH value and dye concentration, while it increased with increasing temperature. The adsorption fitted to the pseudo-second order kinetic model and Elovich model. The intraparticle diffusion model showed that the adsorption involved a multi-step process. The isotherm of CR dye adsorption by CCs conforms to the Langmuir isotherm model, indicating the monolayer nature of adsorption. The maximum monolayer coverage capacity, qmax, was 666.67 mg g−1. Studying the thermodynamic showed that the adsorption was endothermic as illustrated from the positive value of enthalpy (34.49 kJ mol−1). According to the values of ΔG°, the adsorption process was spontaneous at all selected temperatures. The value of ΔS° showed an increase in randomness for the adsorption process. The value of activation energy was 2.47 kJ mol−1. The desorption percentage reached to 58% after 5 cycles. This proved that CCs is an efficient and a promising adsorbent for the removal of CR dye from its aqueous solution.

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