Amido-functionalized carboxymethyl chitosan/montmorillonite composite for highly efficient and cost-effective mercury removal from aqueous solution

Zeng, Hehua; Wang, Lan; Zhang, Dan; Wang, Fu; Sharma, Virender K.; Wang, Chuanyi

doi:10.1016/j.jcis.2019.07.029

Cited by 60 publications

(23 citation statements)

References 51 publications

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“…e adsorption capacity reached 1875 mg/g, representing the highest record so far among the literature polymer/clay adsorbents of Hg ions. is remarkable performance was mainly due to the enhanced porosity of the composite and the increased chelation sites onto the composite structure [52]. For the same target, montmorillonite was complexed with polyvinyl alcohol and poly(4-styrenesulfonic acid-comaleic acid) to offer efficient and cost-effective adsorbents [53].…”

Section: Polymer-cationic Clay Composites For Water Treatment and Desmentioning

confidence: 99%

Current Advances of Polymer Composites for Water Treatment and Desalination

Berber

2020

Journal of Chemistry

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Over the past five years, a lot of research activities in polymer composites were done in order to improve environmental sustainability and to present advantages for commercial applications of water treatment and desalination. Polymers offered tunable properties, improved processability, remarkable stability, high surface area for fast decontamination, selectivity to eliminate different pollutants, and cost-cutting of water treatment. Hence, the development of polymeric materials is one of the future directions to meet the environmental water standards and to supply the water requirements of the growing populations. This review highlighted the very recent achievements in fabrication, characterization, and applications of polymeric composites used for water treatment and desalination. The polymeric modifications, the addition of functional groups, and the assemblies of nanomaterials were also discussed in detail. In particular, great attention was paid to the recent advances in polymer/polymer composites, polymer/carbon composites, and polymer/clay composites, presenting their usage in the removal of various types of contaminants, e.g., metal ions, dyes, and other toxic pollutants. The review also summarized the main advantages and disadvantages of the different adsorbent materials. Specific attention was paid to the mechanism of adsorption, including chemisorption and physisorption mechanisms. In addition, the challenges and the future perspectives were identified to reach the optimal performance of the different adsorbents.

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Section: Polymer-cationic Clay Composites For Water Treatment and Desmentioning

confidence: 99%

Current Advances of Polymer Composites for Water Treatment and Desalination

Berber

2020

Journal of Chemistry

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“…The obtained samples were named HPFC/x % Montmorillonite-S, where x % represents the percentage of montmorillonite-S in the HPFC. [56] X-Ray diffraction (XRD) patterns of sulfhydryl-modified montmorillonite and various composite materials are shown in Figure S1a. The characteristic diffraction peaks are located at 66.06°, 19.81°, 20.75°, 26.61°, and 61.72°.…”

Section: Amido-functionalized Carboxymethyl Chitosan/montmorillonite mentioning

confidence: 99%

“…The amido-functionalized carboxymethyl chitosan/ montmorillonite composite prepared by Zeng et al [56] was also used to adsorb Hg(II) ions in aqueous solutions. Figure S2a shows the trend of removal efficiency and residual concentration with the initial pH value.…”

Section: Adsorbentmentioning

confidence: 99%

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Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Zhang

Crini

Lichtfouse

et al. 2020

The Chemical Record

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Abatement of mercury emissions in air and waters has become a global challenge due to the toxicity of mercury species for life, yet actual remediation techniques are limited. In particular, adsorption of mercury ions onto solids is widely used but most adsorption techniques are not specific, and in turn, removal efficiency is lower. Adsorbents developed so far include activated carbon, clay, bentonite, cellulose and chitosan. Chitosan derivatives have recently attracted research attention for water purification because their molecular frames contain a large amount of À NH 2 and À OH groups that can chelate with metal ions specifically. This manuscript reviews recent advances in chitosan-based adsorbents designed to remove mercury ions from wastewater. Focus is placed on their design, synthesis, characterization, adsorption properties, adsorption mechanisms and applications.

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“…A biopolymer/clay composite adsorbent was developed by introducing montmorillonite modified with sulfhydryl into a hyperbranched polyethylenimine functionalized carboxymethyl chitosan matrix (HPFC/MT-S), and used for the removal of Hg(II) from aqueous solutions [115]. The adsorption capacity was found to be of 9.35 mmol/g, also the selectivity of the composite towards Hg(II) was improved by the introduction of MT-S, yielding a high distribution coefficient value (D = 1 × 10 7 ).…”

Section: 6-diaminopyridine (Pd) and Polyamine Compoundsmentioning

confidence: 99%

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

López

2020

Metals

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Mercury is a toxic metal, thus, it is an element which has more and more restrictions in its uses, but despite the above, the removal of this metal, from whatever the form in which it is encountered (zero valent metal, inorganic, or organic compounds), and from different sources, is of a widespread interest. In the case of Hg(II), or Hg2+, the investigations about the treatment of Hg(II)-bearing liquid effluents (real or in most cases synthetic solutions) appear not to end, and from the various separation technologies, adsorption is the most popular among researchers. In this topic, and in the 2019 year, more than 100 publications had been devoted to this field: Hg(II)-removal-adsorption. This work examined all of them.

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Amido-functionalized carboxymethyl chitosan/montmorillonite composite for highly efficient and cost-effective mercury removal from aqueous solution

Cited by 60 publications

References 51 publications

Current Advances of Polymer Composites for Water Treatment and Desalination

Current Advances of Polymer Composites for Water Treatment and Desalination

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

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