Binding of several heavy metal ions by polyaspartyl polymers and their application to some Chinese herbal medicines

Sun, Bo; Mi, Zhentao; An, Gang; Liu, Guozhu

doi:10.1002/app.26879

Cited by 12 publications

(9 citation statements)

References 8 publications

(16 reference statements)

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“…Because the white background was used by the sensor, the captured Pb 2+ and Sn 2+ have no effect on Cu 2+ detection. In fact, it is reported that PASP has the complexing ability toward Hg 2+ , Cd 2+ , Ca 2+ , Zn 2+ , and so forth. , Compared with PASP, PASP hydrogel cross-linked by ethylenediamine (ED) has abundant −CO–NH– and −NH 2 functional groups on the side chain, which have a stronger complexing ability toward Cu 2+ . Moreover, the strength of complexation decreases in the following order: Cu 2+ > Pb 2+ ≈ Co 2+ > Zn 2+ > Mn 2+ .…”

Section: Resultsmentioning

confidence: 99%

Poly(aspartic acid) Electrospun Nanofiber Hydrogel Membrane-Based Reusable Colorimetric Sensor for Cu(II) and Fe(III) Detection

Zhang

et al. 2019

ACS Omega

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Electrospun nanofiber membrane (ENM) with huge specific surface area is an ideal solid substrate for sensors. However, only a few ENMs are developed into colorimetric sensors and it is even more challenging to fabricate multiple-ion-responsive ENM-based colorimetric sensor. In this study, benefiting from the excellent metal ion adsorption ability of poly(aspartic acid) (PASP) and high specific surface area of nanofibers, a reusable colorimetric sensor utilizing PASP electrospun nanofiber hydrogel membrane (ENHM) was designed to detect Cu2+ and Fe3+ in aqueous solution with simple filtration. The sensor based on PASP–ENHM exhibited high sensitivity and selectivity, and colorimetric responses for Cu2+ and Fe3+ detection could be observed by the naked eye. Upon exposure to Cu2+ aqueous solution, the color of the sensor changed from white to blue with a naked eye detection limit of 0.3 mg/L, while it turned from white to yellow with a detection limit of 0.1 mg/L for Fe3+ detection. Furthermore, this sensor was reusable after metal ion extraction by the desorption process.

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Section: Resultsmentioning

confidence: 99%

Poly(aspartic acid) Electrospun Nanofiber Hydrogel Membrane-Based Reusable Colorimetric Sensor for Cu(II) and Fe(III) Detection

Zhang

et al. 2019

ACS Omega

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“…(3) With both PO 4 3À and CO 3 2À sites, the carbonate-substituted apatite exhibits a strong fixation of Pb 2þ , Cd 2þ , and Cr 3þ . Compared to the polyaspartyl polymer (a protein-like structure) which has been used as a biomimetic material, 17 the carbonate-substituted apatite had lower equilibrium concentrations of Pb 2þ , Cd 2þ , and Cr 3þ .…”

Section: Comparison Of the Fixation Of Heavy Metals By The Substitutementioning

confidence: 99%

“…In our previous work, 16,17 biomimetic materials with a protein-like structure and with a peptide-polysaccharide-like structure that is similar to plant cell walls/membranes were developed, and the structure-activity relationship between them and heavy metals was investigated. These materials were excellent binding agents when the concentration of heavy-metal ions was high.…”

Section: Introductionmentioning

confidence: 99%

Preparation of biomimetic‐bone materials and their application to the removal of heavy metals

et al. 2012

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in Wiley Online Library (wileyonlinelibrary.com).Since heavy metals react with some components in bone, it can be surmized that these components would strongly fix heavy metals. Hydroxyapatite and a series of substituted-apatites that are likely to exist in bone were prepared under nearphysiological conditions with the aim of developing materials that are capable of effectively removing low concentrations of heavy-metal ions at near-neutral conditions. The obtained apatites were characterized by inductively coupled plasma optical emission spectroscopy, Fourier transform infrared spectroscopy, X-ray diffractometry, thermogravimetric and differential thermal analysis, and field-emission scanning electron microscopy. They were also tested for their ability to remove Pb, Cd, Hg, Cr, and As. The carbonate-substituted apatite exhibited very strong fixation of Pb 2þ , Cd 2þ , and Cr 3þ , and moderately strong fixation of Hg 2þ . Based on a heavy-metal-fixing mechanism, a bone-like composite, with chitosan as the saccharide portion and a polyaspartyl polymer as the protein portion, was synthesized via co-precipitation. The biomimetic composite was excellent at removing Pb 2þ , Cd 2þ , Hg 2þ , and Cr 3þ , with removal percentages as high as 99.8% and residual concentrations as low as 0.01 mg/L. However, the composite had little fixation of Cr 2 O 7 2À , CrO 4 2À , or H 3 AsO 3 . When Cr(VI) was reduced to Cr(III), the percent removed increased greatly. *Amount of adsorbents ¼ 0.1 g, total volume of solution ¼ 50 mL, pH ¼ 6À7, exchange time ¼ 2 h, temperature ¼ 18 C, M ¼ Pb, Hg, Cd, Cr, or As † Initial concentration: c (Pb 2þ ) ¼ c (Cd 2þ ) ¼ c (Hg 2þ ) ¼ c (Cr 3þ ) ¼ c (Cr 6þ ) ¼ c (As 3þ ) ¼ 0.48 mmol/L, Cr 6þ and As 3þ were mainly in the form of Cr 2 O 7 2or CrO 4 2and H 3 AsO 3 /HAsO 2 , respectively. ‡ HAP and the substituted-apatites were unground, grain-sizes can be estimated from SEMs in Figure 4. § The grain-size was about 40À50 lm. *Amount of adsorbents ¼ 0.1 g, total volume of solution ¼ 50 mL, exchange time ¼ 2 h, temperature ¼ 19 C, M ¼ Pb, Hg, Cd, Cr, or As, pH 6À7. † Initial concentration: c (Pb 2þ ) ¼ c (Cd 2þ ) ¼ c (Hg 2þ ) ¼ c (Cr 3þ ) ¼ 0.1 mmol/L, c (As 3þ ) ¼ 30.99 mg/L. ‡ As 3þ was mainly in the form of H 3 AsO 3 /HAsO 2 .

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“…Trivalent arsenic inhibits various cellular enzymes (such as pyruvate dehydrogenase). − It can be surmised that some species in organs are sensitive to trace concentrations of heavy metals, and they have the potential to fix heavy metals. In our previous work, some biomimetic materials, including protein resembling, peptide–polysaccharide resembling, and biomimetic-bone materials, have been prepared, and their heavy-metal removal capacity has been investigated. − The investigation showed that they are capable of effectively removing low concentrations of Pb 2+ , Cd 2+ , Hg 2+ , and Cr 3+ ions under near-neutral conditions. However, their removal capacity of As III and As V ions is relatively weak.…”

Section: Introductionmentioning

confidence: 99%

Removal of Trace Arsenic Based on Biomimetic Separation

Sun

Zhai

Zhang

et al. 2014

Ind. Eng. Chem. Res.

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A novel method was proposed to determine the key species (ions or function groups) with strong arsenic fixation capacity as well as the auxiliary species in the fixation. The elements and species involved in the fixation of arsenic were surmised based on the change of the elemental composition in a plant's roots, and their roles in the fixation of heavy metals were assessed using simulated precipitation and adsorption of arsenic under near-physiological conditions (20−35 °C and pH 6−7.5) using chemicals containing the surmised species. The results showed that copper(II) hydroxide and/or carbonate possessed strong As V fixation capacity, while Fe 3+ ions played an auxiliary role in the precipitation of As V . A combination of Fe 2+ and HS − /S 2− ions or a combination of Fe 2+ ions and −SH groups had strong As III fixation capacity. On the basis of the obtained information, an adsorbent using the components (species), which commonly exist in plants, was designed and prepared. The adsorbent was excellent in removing trace As III , with residual concentrations as low as 0.03 mg/L.

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Binding of several heavy metal ions by polyaspartyl polymers and their application to some Chinese herbal medicines

Cited by 12 publications

References 8 publications

Poly(aspartic acid) Electrospun Nanofiber Hydrogel Membrane-Based Reusable Colorimetric Sensor for Cu(II) and Fe(III) Detection

Poly(aspartic acid) Electrospun Nanofiber Hydrogel Membrane-Based Reusable Colorimetric Sensor for Cu(II) and Fe(III) Detection

Preparation of biomimetic‐bone materials and their application to the removal of heavy metals

Removal of Trace Arsenic Based on Biomimetic Separation

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