Hydrogel nanocomposite based on chitosan-g-acrylic acid and modified nanosilica with high adsorption capacity for heavy metal ion removal

Pourjavadi, Ali; Tehrani, Zahra Mazaheri; Satha, Hamid; Banazadeh, Alireza; Abedini, Niloufar

doi:10.1007/s13726-015-0360-1

Cited by 36 publications

(15 citation statements)

References 35 publications

(35 reference statements)

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“…21 In the next step, PEGylated starch-co-poly(acrylic acid) was synthesized. 0.1 M dry PEG and 0.2 M triethylamine were mixed in anhydrous dichloromethane.…”

Section: Preparation Of Pegylated Starch-co-poly(acrylic Acid)mentioning

confidence: 99%

Dendritic magnetite decorated by pH-responsive PEGylated starch: a smart multifunctional nanocarrier for the triggered release of anti-cancer drugs

2015

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In the present study, we designed a pH-responsive drug nanocarrier based on polyamidoamine-modified Fe 3 O 4 nanoparticles coated by PEGylated starch-co-poly(acrylic acid). This carrier was used for the controlled release of doxorubicin as an anticancer drug model. The purpose of using the polyethylene glycol moiety is to generate a biostable nanocarrier in blood stream as it has been reported widely in the pharmaceutical literature. The use of a poly(acrylic acid) segment also provided pH-sensitivity to the polymer. Besides, the magnetic nanoparticles facilitate the cancer cell targeting with an external magnetic field located near the tumor site. This carrier was characterized by techniques such as FT-IR, 1 H-NMR, UV-Vis, DLS, TGA, TEM, zeta potential, WAXD and VSM.Moreover, in vitro drug release profiles and cytotoxicity assays were investigated.

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“…21 In the next step, PEGylated starch-co-poly(acrylic acid) was synthesized. 0.1 M dry PEG and 0.2 M triethylamine were mixed in anhydrous dichloromethane.…”

Section: Preparation Of Pegylated Starch-co-poly(acrylic Acid)mentioning

confidence: 99%

Dendritic magnetite decorated by pH-responsive PEGylated starch: a smart multifunctional nanocarrier for the triggered release of anti-cancer drugs

2015

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“…Nguyen et al proved that the heavy metal removal capacity was highly related to the content of NC in chitin hydrogel [7]. In addition, the presence of NS enhancing the porosity of the hydrogel network and further affecting the adsorption capacity of chitosan-g-acrylic acid hydrogel has been reported by Pourjavadi et al [20]. However, there is not much discussion and comparison about the effects of different nanofillers on the reinforcement and adsorption performances of hydrogels, which have good mechanical strength and a strong adsorption ability and can be used in alleviating the severe environmental situation.…”

Section: Introductionmentioning

confidence: 99%

Assembly of Polyacrylamide-Sodium Alginate-Based Organic-Inorganic Hydrogel with Mechanical and Adsorption Properties

Yue

Wang

et al. 2019

Polymers

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Hydrogels have been widely used in water purification. However, there is not much discussion and comparison about the effects of different nanofillers on the reinforcement and adsorption performances of hydrogels, which can be subjected to rapid water flow and possess strong adsorption ability. In this work, polyacrylamide (PAAM)-sodium alginate (SA) interpenetrating polymer network-structured hydrogels were prepared by in situ polymerization. PAAM formed the first flexible network and SA constructed the second rigid network. Three kinds of inorganic nanoparticles including carbon nanotubes (CNTs), nanoclays (NCs), and nanosilicas (NSs) were incorporated into a PAAM-SA matrix via hydrogen bond. The obtained hydrogels exhibited a macroporous structure with low density (≈1.4 g/cm3) and high water content (≈83%). Compared with neat PAAM-SA, the hydrogels with inorganic nanoparticles possessed excellent mechanical strengths and elasticities, and the compression strength of PAAM-SA-NS reached up to 1.3 MPa at ε = 60% by adding only 0.036 g NS in a 30 g polymer matrix. However, CNT was the best filler to improve the adsorption capacity owing to its multi-walled hollow nanostructure, and the adsorption capacity of PAAM-SA-CNT was 1.28 times higher than that of PAAM-SA. The prepared hydrogels can be potential candidates for use as absorbents to treat wastewater.

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“…Consequently, more adsorbate molecules bind to the active sites of the adsorbent, thus accelerating the diffusion of dyes or heavy metals onto the adsorbent sites due to the increase in driving force of concentration gradient, resulting in higher adsorption capacities [ 9 ]. However, a decline of adsorption efficiency due to higher pollutant concentration was reported in some recent works [ 173 , 174 ]. In the typical adsorption process, adsorption capacity is sharply increased until the plateau state.…”

Section: Factors Affecting the Adsorption Capacity Of Cbhsmentioning

confidence: 99%

Cellulose-Based Hydrogels for Wastewater Treatment: A Concise Review

Akter

Bhattacharjee

Dhar

et al. 2021

Gels

121

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Finding affordable and environment-friendly options to decontaminate wastewater generated with heavy metals and dyes to prevent the depletion of accessible freshwater resources is one of the indispensable challenges of the 21st century. Adsorption is yet to be the most effective and low-cost wastewater treatment method used for the removal of pollutants from wastewater, while naturally derived adsorbent materials have garnered tremendous attention. One promising example of such adsorbents is hydrogels (HGs), which constitute a three-dimensional polymeric network of hydrophilic groups that is highly capable of adsorbing a large quantity of metal ions and dyes from wastewater. Although HGs can also be prepared from synthetic polymers, natural polymers have improved environmental benignity. Recently, cellulose-based hydrogels (CBHs) have been extensively studied owing to their high abundance, biodegradability, non-toxicity, and excellent adsorption capacity. This review emphasizes different CBH adsorbents in the context of dyes and heavy metals removal from wastewater following diverse synthesis techniques and adsorption mechanisms. This study also summarizes various process parameters necessary to optimize adsorption capacity followed by future research directions.

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Hydrogel nanocomposite based on chitosan-g-acrylic acid and modified nanosilica with high adsorption capacity for heavy metal ion removal

Cited by 36 publications

References 35 publications

Dendritic magnetite decorated by pH-responsive PEGylated starch: a smart multifunctional nanocarrier for the triggered release of anti-cancer drugs

Dendritic magnetite decorated by pH-responsive PEGylated starch: a smart multifunctional nanocarrier for the triggered release of anti-cancer drugs

Assembly of Polyacrylamide-Sodium Alginate-Based Organic-Inorganic Hydrogel with Mechanical and Adsorption Properties

Cellulose-Based Hydrogels for Wastewater Treatment: A Concise Review

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