Selective removal of Cr(VI) from aqueous solution by polypyrrole/2,5-diaminobenzene sulfonic acid composite

Kera, Nazia H.; Bhaumik, Madhumita; Ballav, Niladri; Pillay, Kriveshini; Ray, Suprakas Sinha; Maity, Arjun

doi:10.1016/j.jcis.2016.05.011

Cited by 69 publications

(22 citation statements)

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“…As Cl À , CO 3 2À and SO 4 2À are weaker oxidizing agents than HCrO 4 À (Cr(VI)), they are not reduced by PPF and therefore do not affect Cr(VI) adsorption. 38 In addition, reusability is also one of the most important considerations in the suitability of adsorbents because better recyclability greatly reduces the overall cost of the adsorbent. In this study, we showed that the adsorption of Cr(VI) ions onto our PEI-PVA functional lm is pH-dependent, and that lower pH values are suitable for Cr(VI) adsorption; therefore, the desorption of Cr(VI) ions from the adsorbent can be achieved by increasing the system's pH.…”

Section: Effect Of Coexisting Ions and Reusabilitymentioning

confidence: 99%

Recyclable functionalized polymer films for the efficient removal of hexavalent chromium from aqueous solutions

et al. 2019

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Section: Effect Of Coexisting Ions and Reusabilitymentioning

confidence: 99%

Recyclable functionalized polymer films for the efficient removal of hexavalent chromium from aqueous solutions

et al. 2019

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“…Finally, the morphology of the samples was evaluated by SEM and the images are shown in Figure . SEM image shows for GOPy the typical wrinkled structures of GO and for the pristine Ppy, a globular and rough morphology, characteristic of Ppy . A detailed analysis of Poly‐GOPy shows a new morphological structure, formed by the interaction between GOPy and Ppy, where GO sheets seem to be wrapped by Ppy.…”

Section: Resultsmentioning

confidence: 95%

Covalently linked nanocomposites of polypyrrole with graphene: Strategic design toward optimized properties

Naidek

Zarbin

Orth

2018

J. Polym. Sci. Part A: Polym. Chem.

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Graphene-based nanocomposites with conducting polymers have attracted increasing interest due to the enhanced synergistic properties, which can potentiate and broaden applications. In this context, covalent functionalization stands out as a strategic designing tool, which optimizes the interaction between the nanocomposites components. Herein, covalently linked polymeric nanocomposites were obtained between graphene derivatives and polypyrrole (Ppy) under mild routes (i.e., aqueous, room temperature). First, pyrrole was covalently functionalized on graphene oxide (GO) through stable amide bonds and further polymerization with FeCl 3 led to the polymeric nanocomposites. Finally, to improve conductivity, GO was reduced using NaBH 4 . Similarly, analogous noncovalent nanocomposites were obtained for comparison purposes. All samples were thoroughly characterized by thermogravimetric analysis, scanning electron microscopy, and infrared and Raman spectroscopy, confirming the targeted functionalization, polymerization, and reduction processes. Moreover, the covalent link effectively enhances the interaction of the nanocomposite's components as evidenced by its improved electrochemical stability (300 cycles), compared to the non-covalent composites which loses conductivity in the initial stages. Indeed, Ppy is known for its low stability, limiting its applications. Overall, the results herein evidence that covalently linked nanocomposites can be successfully obtained with optimized electrochemical response, promising for applications as supercapacitors and artificial muscles.

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“…Cr(VI) is highly toxic and easily deposited in the human body through the food chain. In addition, Cr(VI) is considered to be a hazardous substance [3][4][5]. Therefore, efficient removal of Cr(VI) from water has become one of the hot issues in the field of environmental and analytical chemistry, and industrial process engineering.…”

Section: Introductionmentioning

confidence: 99%

Removal of Cr(VI) from Aqueous Solution by Polypyrrole/Hollow Mesoporous Silica Particles

Gao

Liu

et al. 2020

Nanomaterials

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The removal of Cr(VI) in wastewater plays an important role in human health and environment. In this work, polypyrrole/hollow mesoporous silica particle (PPy/HMSNs) adsorbents have been newly synthesized by in-situ polymerization, which prevent the aggregation of pyrrole in the process of polymerization and exhibit highly selective and powerful adsorption ability for Cr(VI). The adsorption process was in good agreement with the quasi-second-order kinetic model and the Langmuir isotherm model. And the maximum adsorption capacity of Cr(VI) was 322 mg/g at 25 °C. Moreover, the removal rate of Cr(VI) by PPy/HMSNs was ~100% in a number of binary systems, such as Cl−/Cr(VI), NO3−/Cr(VI), SO42−/Cr(VI), Zn2+/Cr(VI), Fe3+/Cr(VI), Sn4+/Cr(VI), and Cu2+/Cr(VI). Thus, the PPy/HMSNs adsorbents have great potential for the removal of Cr(VI) in wastewater.

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Selective removal of Cr(VI) from aqueous solution by polypyrrole/2,5-diaminobenzene sulfonic acid composite

Cited by 69 publications

References 50 publications

Recyclable functionalized polymer films for the efficient removal of hexavalent chromium from aqueous solutions

Recyclable functionalized polymer films for the efficient removal of hexavalent chromium from aqueous solutions

Covalently linked nanocomposites of polypyrrole with graphene: Strategic design toward optimized properties

Removal of Cr(VI) from Aqueous Solution by Polypyrrole/Hollow Mesoporous Silica Particles

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