Novel graphene oxide/carboxymethyl chitosan aerogels via vacuum-assisted self-assembly for heavy metal adsorption capacity

Luo, Jingqi; Fan, Chuanjie; Zhi, Xiao; Sun, Tianshu; Zhou, Xiaodong

doi:10.1016/j.colsurfa.2019.123584

Cited by 73 publications

(10 citation statements)

References 50 publications

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“…Nowadays, water purification in safe drinking water production is one of the most critical problems undertaken by scientists [ 1 , 2 , 3 , 4 ]. The most frequently used process in classic water treatment systems is filtration [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

et al. 2022

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Inorganic aluminum or iron salts supported with synthetic polymers are commonly used to eradicate colloidal particles from water in coagulation and flocculation processes. Nevertheless, these agents have several disadvantages, such as large volumes of sludge produced or environmental toxicity. Recently biodegradable polymers have been suggested as eco-friendly flocculants for water treatment. This study aimed to investigate the possibilities of using starch and chitosan and their oxidized derivatives as flocculants for filter backwash water treatment. Dialdehyde starch (DST) and dialdehyde chitosan (DCT) were synthesized by periodate oxidization of natural starch from corn and low molecular weight chitosan. The obtained materials have been characterized with scanning electron microscopy (SEM), ATR-FTIR spectroscopy, and thermogravimetric analysis (TGA). Furthermore, we studied the flocculation properties of polysaccharide flocculants in a series of jar tests. The effectiveness of chitosan and starched-based flocculants was compared to synthetic polymers commonly used to treat iron ions-rich filter backwash water. The environmental aspects of these chemicals, particularly the biodegradability of post-flocculation residues, were also addressed. It was found that oxidized starch and chitosan derivatives can be used as ecological flocculating materials to treat potable water or sludge.

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Section: Introductionmentioning

confidence: 99%

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

et al. 2022

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“…Vacuum-assisted self-assembly is a common self-assembly method for two-dimensional materials. − Under the action of gravity and pressure, two-dimensional materials form denser structures that show significantly improved strength and toughness. , After supramolecular modifications, UPy–PEG1000–NCO-modified sMica self-assembled into macroscopic flakes under the action of vacuum and quadruple hydrogen bonding between UPy, forming a tough mica paper.…”

Section: Resultsmentioning

confidence: 99%

Force-Induced Self-Assembly of Supramolecular Modified Mica Nanosheets for Ductile and Heat-Resistant Mica Papers

Jiang

Zhang

et al. 2021

Langmuir

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Mica is a naturally abundant layered silicate mineral that has higher strength than other layered silicate minerals, but its inherent brittleness limits its application in some fields. In this work, mica was ultrasonically exfoliated into a single-layered nanomaterial after thermal activation, acidification, sodium replacement, and cetyltrimethylammonium bromide (CTAB) intercalation and then modified with ureido-pyrimidinone (UPy)-based PEG chains. Vacuum-assisted self-assembly was used to construct supramolecularly modified single-layered mica into bulk materials, in which the mica nanosheets were stacked into mica paper. The reversible quadruple hydrogen-bonded UPy moieties provided a high binding constant and significantly improved the strength and toughness of the obtained mica paper. These force-induced assembled mica papers showed significantly improved tensile strength and toughness compared with pure mica paper and simultaneously maintained the heat resistance of the mica materials, which may be good candidates for the substrates of flexible sensors working at higher temperatures.

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“…126 Aerogels as metal ion adsorbents, on the other hand, have received a lot of interest. [127][128][129][130] When compared to other adsorbents, aerogels have certain unique characteristics, such as large and adjustable pore volumes, high specific surface areas, and are lightweight in nature, which are vital to adsorb various contaminants. 131 Our team presented a unique biopolymer-based aerogel membrane functionalized with Fe-Al nanocomposites for vigorous water purification with the goal of establishing a cost-effective technique for quick and flexible water purification.…”

Section: Biopolymer-based Nanocomposite-based Devicesmentioning

confidence: 99%

Nanocomposite-based high-performance adsorptive water filters: recent advances, limitations, nanotoxicity and environmental implications

Kamath

Mruthunjayappa

Mondal

et al. 2022

Environ. Sci.: Nano

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Novel graphene oxide/carboxymethyl chitosan aerogels via vacuum-assisted self-assembly for heavy metal adsorption capacity

Cited by 73 publications

References 50 publications

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

Force-Induced Self-Assembly of Supramolecular Modified Mica Nanosheets for Ductile and Heat-Resistant Mica Papers

Nanocomposite-based high-performance adsorptive water filters: recent advances, limitations, nanotoxicity and environmental implications

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