Removal of Cu(II) Ions from Aqueous Solution by Magnetic Chitosan-Tripolyphosphate Modified Silica-Coated Adsorbent: Characterization and Mechanisms

Li, Kai; Ning, Ping; Bao, Shuangyou; Tang, Lihong

doi:10.1007/s11270-017-3482-6

Cited by 33 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At a lower pH, -NH 2 would be protonated into the positively charged -NH 3 + , causing electrostatic repulsion between the Cu (II) ion and MS, which is not conducive to the adsorption of Cu (II). At pH = 5, the concentration of H + in the solution is much lower, and hence the protonation of -NH 2 is greatly reduced, thus significantly increasing the Cu (II) ion adsorption capacity [ 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

A Simple One-Step Modification of Shrimp Shell for the Efficient Adsorption and Desorption of Copper Ions

2021

View full text Add to dashboard Cite

Removing toxic heavy metal species from aqueous solutions is a point of concern in our society. In this paper, a promising biomass adsorbent, the modified waste shrimp shell (MS), for Cu (II) removal was successfully prepared using a facile and simple one-step modification, making it possible to achieve high-efficiency recycling of the waste NaOH solution as the modification agent. The outcome shows that with the continuous increase in pH, temperature and ion concentration, the adsorption effect of MS on Cu (II) can also be continuously improved. Adsorption isotherm and adsorption kinetics were fitted with the Langmuir isotherm model and the pseudo-second-order model, respectively, and the maximum adsorption capacity of Cu (II) as obtained from the Langmuir isotherm model fitting reached 1.04 mmol/g. The systematic desorption results indicated that the desorption rate of Cu (II) in the MS could reach 100% within 6 min, where HNO3 is used as the desorption agent. Moreover, experiments have proven that after five successive recycles of NaOH as a modifier, the adsorption capacity of MS on Cu (II) was efficient and stable, maintaining tendency in 0.83–0.85 mmol/g, which shows that waste NaOH solution can be used as a modification agent in the preparation of waste shrimp shell adsorbent, such as waste NaOH solution produced in industrial production, thereby making it possible to turn waste into renewable resources and providing a new way to recycle resources.

show abstract

Section: Resultsmentioning

confidence: 99%

A Simple One-Step Modification of Shrimp Shell for the Efficient Adsorption and Desorption of Copper Ions

2021

View full text Add to dashboard Cite

show abstract

“…However, in most reported cases, it should be noticed that materials cannot be obtained as monoliths, which limits their potential for recuperation and recycling, and their removal kinetics are often slower, which is not the case with the synthesized chitosan-silica composite aerogel, as it is generally superior regarding the process scalability and quickness. Silica gel/chitosan composite 870 15 [62] Magnetic chitosan-tripolyphosphate@silica-coated composite 73 200 [63] Chitosan-grafted-acrylic acid and modified nanosilica hydrogel 795 120 [64] β-cyclodextrin-grafted-carboxymethylchitosan-modified silica gel 9 120 [65] Carboxymethylchitosan-functionalized colloidal silica particles 172 60 [66] Carboxymethylchitosan@silica-coated magnetic nanoparticles 346 120 [67] Si Reduced salicylaldehyde-modified chitosan polymer 78 840 [55] Schiff base organically modified silica aerogel 14 180 [52] Schiff base-functionalized silica aerogel 244 360 [77] Amino propyl triethoxysilane-modified silica aerogel 48 1440 [43] Mercapto-functionalized silica aerogel 51 120 [78] Amino-mercapto-functionalized silica xerogel 140 30 [79] Amine-modified silica aerogel 130 >1440 [46] Amine-modified silica xerogel 124 160 [80] Amidoxime-functionalized silica aerogel 534 120 [81] Methyl acrylate-modified silica aerogel 219 60 [82] Nano-silica aerogel gelatin 369 300 [83] APTES and EDTA-modified silica aerogel 94 20 [84] Hybrid surfactant-templated mesoporous silica material…”

Section: Langmuir Modelmentioning

confidence: 99%

Chitosan–Silica Composite Aerogel for the Adsorption of Cupric Ions

Vareda,

Matias,

Paixão

et al. 2024

Gels

View full text Add to dashboard Cite

A chitosan–silica hybrid aerogel was synthesized and presented as a potential adsorbent for the purification of cupric ion-contaminated media. The combination of the organic polymer (chitosan), which can be obtained from fishery wastes, with silica produced a mostly macroporous material with an average pore diameter of 33 µm. The obtained aerogel was extremely light (56 kg m−3), porous (96% porosity, 17 cm3 g−1 pore volume), and presented a Brunauer–Emmett–Teller surface area (SBET) of 2.05 m2 g−1. The effects of solution pH, aerogel and Cu(II) concentration, contact time, and counterion on cupric removal with the aerogel were studied. Results showed that the initial pH of the cation-containing aqueous solution had very little influence on the removal performance of this aerogel. According to Langmuir isotherm, this material can remove a maximum amount of ca. 40 mg of cupric ions per gram and the kinetic data showed that the surface reaction was the rate-limiting step and equilibrium was quickly reached (in less than one hour). Thus, the approach developed in this study enabled the recovery of waste for the preparation of a novel material, which can be efficiently reused in a new application, namely water remediation.

show abstract

“…5a). 37 Chang 62 synthesized carboxymethylated chitosan and then combined it with Fe 3 O 4 through carbodiimide activation and prepared chitosan modified magnetic adsorption material to quickly adsorb metal ions in water. When the pH was 2.5, the adsorption equilibrium of Cu 2+ could be reached in about 1 min, and the maximum adsorption capacity was 25.5 mg g −1 .…”

Section: Magnetic Adsorption Materials Modified By High Molecular Pol...mentioning

confidence: 99%

Adsorption of heavy metal ions in water by surface functionalized magnetic composites: a review

Zeng

Zhang

Zhu

et al. 2022

Environ. Sci.: Water Res. Technol.

View full text Add to dashboard Cite

show abstract

Removal of Cu(II) Ions from Aqueous Solution by Magnetic Chitosan-Tripolyphosphate Modified Silica-Coated Adsorbent: Characterization and Mechanisms

Cited by 33 publications

References 46 publications

A Simple One-Step Modification of Shrimp Shell for the Efficient Adsorption and Desorption of Copper Ions

A Simple One-Step Modification of Shrimp Shell for the Efficient Adsorption and Desorption of Copper Ions

Chitosan–Silica Composite Aerogel for the Adsorption of Cupric Ions

Adsorption of heavy metal ions in water by surface functionalized magnetic composites: a review

Contact Info

Product

Resources

About