Biological Antagonism Inspired Detoxification: Removal of Toxic Elements by Porous Polymer Networks

Feng, Liang; Chen, Wenmiao; Li, Jia-Luo; Day, Gregory S.; Drake, Hannah F.; Joseph, Elizabeth; Zhou, Hong‐Cai

doi:10.1021/acsami.9b02826

Cited by 23 publications

(12 citation statements)

References 39 publications

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“…Therefore, the removal of such pollutants from water has become a challenge for environmental engineers. Several techniques have been applied for the removal of these harmful metallic ions and dyes from water and wastewater such as membrane filtration [ 9 ], photocatalytic reduction [ 10 ], biological treatment [ 11 ], precipitation [ 12 ], electrocoagulation [ 13 ], and adsorption [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

et al. 2021

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A magnetic polymer-based nanocomposite was fabricated by the modification of an Fe3O4/SiO2 magnetic composite with polypyrrole (PPy) via co-precipitation polymerization to form PPy/Fe3O4/SiO2 for the removal of Congo red dye (CR) and hexavalent chromium Cr(VI) ions from water. The nanocomposite was characterized using various techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), vibration sample magnetometer, and thermogravimetric analysis (TGA). The results confirm the successful fabrication of the nanocomposite in the size of nanometers. The effect of different conditions such as the contact time, adsorbent dosage, solution pH, and initial concentration on the adsorption process was investigated. The adsorption isotherm suggested monolayer adsorption of both contaminants over the PPy/Fe3O4/SiO2 nanocomposite following a Langmuir isotherm, with maximum adsorption of 361 and 298 mg.g−1 for CR dye and Cr(VI), respectively. Furthermore, the effect of water type on the adsorption process was examined, indicating the applicability of the PPy/Fe3O4/SiO2 nanocomposite for real sample treatment. Interestingly, the reusability of the nanocomposite for the removal of the studied contaminants was investigated with good results even after six successive cycles. All results make this nanocomposite a promising material for water treatment.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

et al. 2021

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“…Moreover, they can also combine with metal ions in wastewater to form complex pollutants. Several methods are used to remove these complex structures such as precipitation [15], membrane filtration [16,17], photocatalytic reduction [18], electrocoagulation [19], biological treatment [20], electrochemical removal [21], and adsorption [22][23][24][25][26][27][28]. In the past few decades, great attention has been paid to the adsorption process due to its ease of application on a large scale and its efficiency [29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Quaternization of Poly(2-diethyl aminoethyl methacrylate) Brush-Grafted Magnetic Mesoporous Nanoparticles Using 2-Iodoethanol for Removing Anionic Dyes

et al. 2021

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Magnetic mesoporous silica nanoparticles (Fe3O4-MSNs) were successfully synthesized with a relatively high surface area of 568 m2g−1. Fe3O4-MSNs were then modified with poly(2-diethyl aminoethyl methacrylate) (PDEAEMA) brushes using surface-initiated ARGET atom transfer radical polymerization (ATRP) (Fe3O4@MSN-PDMAEMA). Since the charge of PDEAEMA is externally regulated by solution pH, tertiary amines in the polymer chains were quaternized using 2-iodoethanol to obtain cationic polymer chains with a permanent positive charge (Fe3O4@MSN-QPDMAEMA). The intensity of the C−O peak in the C1s X-ray photoelectron spectrum increased after reaction with 2-iodoethanol, suggesting that the quaternization process was successful. The applicability of the synthesized materials on the removal of methyl orange (MO), and sunset yellow (E110) dyes from an aqueous solution was examined. The effects of pH, contact time, and initial dyes concentrations on the removal performance were investigated by batch experiments. The results showed that the Fe3O4@MSN-PDMAEMA sample exhibited a weak adsorption performance toward both MO and E110, compared with Fe3O4@MSN-QPDMAEMA at a pH level above 5. The maximum adsorption capacities of MO and E110 using Fe3O4@MSN-QPDMAEMA were 294 mg g−1 and 194.8 mg g−1, respectively.

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“…One strategy for the preparation of these advanced materials is to fabricate selective, high affinity (e.g., sulfur containing) active sites for binding Hg(II) onto porous, inert supports (e.g., silica). − Another strategy is to synthesize superior composite or hybrid materials from natural Hg(II) adsorbents to enhance their performance and/or technical applicability. A frequently utilized, versatile component is chitosan. − Other versatile platforms are graphene and graphene oxide. − Porous synthetic polymers form the basis of exceptionally high durability adsorbents. − Magnetic particles are also frequently used platforms for advanced adsorbents because these particles can easily and selectively be separated from the liquid phase. − Composite preparations are also synthesized from gelatin, an archetypical biomaterial that has a well-known affinity toward Hg(II). − Most recently, the best overall adsorption performance has been reported for functionalized and hybrid porous graphene adsorbents, (e.g., cysteine and αFeOOH decorated graphene and graphene oxide) and quantum dot or graphene decorated porous silica. Typically, these materials exhibit adsorption capacities between 100 and 800 mg g –1 at initial Hg(II) concentrations [ c 0 (Hg)] between 1.0 and 500 mg L –1 at adsorbent concentrations between 10 and 500 mg L –1 .…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Silica–Gelatin Aerogels for the Selective Adsorption of Aqueous Hg(II)

Herman

Fábián²,

Kalmár

2019

ACS Appl. Nano Mater.

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Supercritically dried, mesoporous silica–gelatin hybrid aerogels of 4–24 wt % gelatin content show high selectivity for the adsorption of aqueous Hg(II) in the simultaneous presence of Cu(II), Cd(II), Co(II), Pb(II), Ni(II), Ag(I), and Zn(II), as demonstrated by batch adsorption experiments with multiple competing ions. The aerogels are characterized by SEM and N2 porosimetry, and their aqueous particle size distributions and zeta potentials are reported. The adsorption properties of the hybrid aerogels are studied as a function of their composition, initial aqueous Hg(II) concentration, contact time, and pH. The optimum pH for adsorption is 6.0, where the surface of the aerogel is already negatively charged, but Hg(II) does not completely hydrolyze. The Hg(II) uptake of the hybrid aerogels increases with increasing gelatin content and levels off at 24 wt % gelatin. The adsorption capacity of the 24 wt % gelatin hybrid is estimated to be S = 209 mg g–1 by fitting the isotherm with the Langmuir model (K L = 0.032 L mg–1). This translates to 91% Hg(II) removal at c 0(Hg) = 1.0 mg L–1 and c 0(aerogel) = 0.32 g L–1. Gelatin provides the active sites for Hg(II) binding; thus, higher gelatin content results in higher adsorption capacity. However, high gelatin content also induces the extensive swelling of backbone and the partial collapse of the open porous structure, which decreases the specific surface area. Time-resolved experiments show that the adsorption equilibrium is established within 15 min contact time with aqueous Hg(II). Washing the equilibrated aerogels with a 2.5 mM solution of EDTA complexing agent quantitatively liberates bound Hg(II). The regenerated aerogels demonstrate practically intact adsorption capacities in five cycles of reuse. Coordination chemistry based considerations reveal that Hg(II) is selectively complexed by the soft Lewis-base side chains of collagen.

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Biological Antagonism Inspired Detoxification: Removal of Toxic Elements by Porous Polymer Networks

Cited by 23 publications

References 39 publications

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

Quaternization of Poly(2-diethyl aminoethyl methacrylate) Brush-Grafted Magnetic Mesoporous Nanoparticles Using 2-Iodoethanol for Removing Anionic Dyes

Mesoporous Silica–Gelatin Aerogels for the Selective Adsorption of Aqueous Hg(II)

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