Synthesis of γ-cyclodextrin/chitosan composites for the efficient removal of Cd(II) from aqueous solution

Mishra, Ajay Kumar; Sharma, Ajit

doi:10.1016/j.ijbiomac.2011.06.002

Cited by 37 publications

(5 citation statements)

References 35 publications

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“…One gram of each resin (SPS, SPS-g-Acryl, and SPSg-Chit) was treated with 25 ml of prepared aqueous solutions of Pb 2+ , Cd 2+ , and Fe 3+ in pH ranges of 2, 4, 6, and 8 [17,18]. Each bottle containing resins was left at room temperature for an hour of shaking (175 rpm min -1 ).…”

Section: Study the Effect Of The Ph On The Resins By Batch Methodsmentioning

confidence: 99%

Preparation of recycled poly s tyrene derivatives to remove heavy metal ions from contaminated water

Al-Lami

Al-Mosawi

Awad

2023

Anal. Method Environ. Chem. J.

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In recent years, numerous researchers have concentrated on the process of turning waste into usable materials. Polystyrene and its modifications have received great attention over the past few decades due to their outstanding ion exchange behavior toward various toxic heavy metals in aqueous solutions. Therefore, this study is concerned with the preparation of three different cationic polymeric resins for the removal of Pb2+, Cd2+, and Fe3+ heavy metal ions from their contaminated water samples based on the sulfonated single-used polystyrene teacup waste (SPS), which was used to prepare sulfonated polystyrene-g-acrylamide monomer (SPS-g-Acryl) and sulfonated polystyrene-g-chitosan (SPS-g-Chit) using commercial chitosan (DD=85%) originally extracted from shrimp cortex. The concentrations of the selected heavy metal ions were measured before and after each experiment with a flame atomic absorption spectrometer (F-AAS). The analytical studies started by exploring the influence of pH (2, 4, 6, and 8) on removing the heavy metal ions Pb2+, Cd2+, and Fe3+ from their aqueous solutions. The obtained results revealed that as the pH of the analyzed ion solution is increased, the removal efficiency for ions increases. All three resins (SPS, SPS-g-Acryl, and SPS-g-Chit) had different removal efficiencies for the investigated ions, with SPS-g-Chit resin.

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Section: Study the Effect Of The Ph On The Resins By Batch Methodsmentioning

confidence: 99%

Preparation of recycled poly s tyrene derivatives to remove heavy metal ions from contaminated water

Al-Lami

Al-Mosawi

Awad

2023

Anal. Method Environ. Chem. J.

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“…Recent studies have shed light on the effects of co-existing ions, including Cl − , SO 4 2− , NO 3 − , and PO 4 3− , and other metal cations, on the adsorption of HM ions onto CS-based materials. For instance, Mishra et al (2011) investigated the influence of NaCl and Na 2 SO 4 on the adsorption of Cd(II) by Ch-g-CD at pH 8.5. Their findings revealed that the presence of NaCl and Na 2 SO 4 in concentrations ranging from 0.01 to 1.0 M led to a significant reduction in the removal of Cd.…”

Section: Factors Affecting Adsorptionmentioning

confidence: 99%

Chitosan-Based Biostimulation: A Novel Approach for Simultaneous Remediation of Co-Existing Cadmium and Arsenic Contamination in Soil

Ullah,

Hayat,

Qiao

2023

Air, Soil and Water Research

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Cadmium (Cd) and arsenic (As) are both potentially toxic heavy metals (HMs) found ubiquitously in the environment. These HMs are prevalent in soil due to natural occurrences or anthropogenic activities. Co-contamination of Cd and As in soil is a major concern for plant and human health as well as ecosystem sustainability due to their hazardous properties. Therefore, a global imperative is developing improved technologies for managing and remediating soil co-contaminated with Cd and As. One effective solution for remediating Cd/As co-contaminated soil involves the utilization of natural biopolymers and biostimulants, such as chitosan (CS). CS offers distinct advantages, including its ready availability, biodegradability, biocompatibility, environmental friendliness, and cost-effectiveness when compared to alternative adsorbents. The adsorption mechanism of CS and CS-based adsorbents for Cd and As primarily relies on electrostatic attraction, complexation, and ion exchange. This review article provides a comprehensive overview of Cd and As co-contamination in soil, elucidating their sources, distribution patterns, exposure pathways, and the prospective remediation approaches employing CS biostimulants and CS-based adsorbents. Furthermore, it summarizes recent studies investigating the adsorption of Cd/As by CS, the factors influencing the adsorption efficiency and the challenges associated with the utilization of CS and CS-based adsorbents. In conclusion, the review underscores the need for further research to concurrently remediate Cd and As co-contaminated soil, enhance the adsorption efficiency of CS and CS-based composites, and broaden their practical applicability for remediating co-contaminated soils.

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“…The adsorption capacity of the grafted copolymer shows a better ability to adsorb Cd(II) and Pb(II) ions than unmodified chitosan, and as such, the adsorption capacity of the graft copolymer increases with increasing degree of grafting [104]. For example, Mishra and Sharma (2011) synthesized chitosan-graft-c-cyclodextrin (Ch-g-c-CD) for Cd(II) removal, achieving better adsorption, i.e., 833.33 mg/g, which was better the raw form [105].…”

Section: Difference Between Functionalization Copolymerization and Gr...mentioning

confidence: 99%

Some Well-Known Alginate and Chitosan Modifications Used in Adsorption: A Review

Benettayeb

Ghosh

Usman

et al. 2022

Water

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Owing to environmental pollution and increasingly strict regulations, heavy metals have attracted the attention of many researchers in various disciplines. Alginate and chitosan derivatives have gained popularity as biosorbents for water treatment. An increase in the number of publications on modified biosorbents for the biosorption of toxic compounds reveals widespread interest in examining the requirements and positive contribution of each modification type. This paper reviews the advantages and disadvantages of using alginate and chitosan for adsorption. Well-known modifications based on chitosan and alginate, namely, grafting, functionalization, copolymerization and cross-linking, as well as applications in the field of adsorption processes, especially amino acid functionalization, are reviewed. The selection criteria for the best biosorbents and their effectiveness and proposed mechanism of adsorption are discussed critically. In the conclusion, the question of why these adsorbents need modification before use is addressed.

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Synthesis of γ-cyclodextrin/chitosan composites for the efficient removal of Cd(II) from aqueous solution

Cited by 37 publications

References 35 publications

Preparation of recycled poly s tyrene derivatives to remove heavy metal ions from contaminated water

Preparation of recycled poly s tyrene derivatives to remove heavy metal ions from contaminated water

Chitosan-Based Biostimulation: A Novel Approach for Simultaneous Remediation of Co-Existing Cadmium and Arsenic Contamination in Soil

Some Well-Known Alginate and Chitosan Modifications Used in Adsorption: A Review

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