Green and inexpensive method to recover Bisphenol-A from polycarbonate wastes

Nikje, Mir Mohammad Alavi; Askarzadeh, Mohammad

doi:10.1590/s0104-14282013005000019

Cited by 24 publications

(9 citation statements)

References 17 publications

(18 reference statements)

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“…The peak at 1542cm −1 corresponds to the C=C bond of aromatic rings of the BPA molecular structure. Peaks between 2852 and 2919cm −1 were attributed to the C-H functional group present in the polypropylene structure, similar to the results reported by Nikje et al 20 The incorporation of BPA into PLA caused the disappearance of the 1045 and 1160cm −1 peaks, referring to the C-C and C-O bonds. With respect to PP, the incorporation of BPA caused the disappearance of the peaks 996, 1375, and 1460cm −1 , which correspond to the C-C, CH 3 , and CH 2 bonds, respectively.…”

Section: Determination Of Bpasupporting

confidence: 87%

Degradation study of BPA-containing plastics in water samples collected from an urban reservoir

Rosa

Nunes

Bianchi

et al. 2018

IJH

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Water pollution is a significant problem worldwide, particularly in Brazil where the majority of urban populations rely on drinking water from surface water reservoirs. The accumulation of plastic debris, such as polycarbonate blends, in reservoirs and other waterways is a public health issue because of health and environmental concerns associated with their chemical degradation. A compound commonly found in plastics, 2,2-bis(4-hydroxyphenyl)propane (bisphenol-A; BPA), has become a serious environmental problem due to its release in water and its estrogen-like properties. This paper focuses on understanding the degradation process of two types of plastics containing BPA, polypropylene (PP) and poly(lactic acid) (PLA), in surface waters. The strength of the chemical binding of BPA to PP and PLA was examined using thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. Release of BPA from both types of plastics was determined in surface water samples collected from the Billings Reservoir, the largest source of drinking water of Sao Paulo residents. The results show that BPA bound to PP-based plastics is released more rapidly into surface waters than that bound to PLA-based plastics.

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Section: Determination Of Bpasupporting

confidence: 87%

Degradation study of BPA-containing plastics in water samples collected from an urban reservoir

Rosa

Nunes

Bianchi

et al. 2018

IJH

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“…For PC support membrane, peaks at 1770 cm −1 and 1220 cm −1 were assigned to C = O and C‐O bonds, respectively. [ 29 ] Another peak observed at 1504 cm −1 appears due to C = C stretching in aromatic ring carbon. For the TFC membrane spectra, the broadband in the 3200 to 3600 cm −1 region is attributed to the asymmetric vibration of hydroxyl (–OH) groups introduced by PVA coating.…”

Section: Resultsmentioning

confidence: 99%

Incorporation of amino‐functionalized ZnO nanoparticles into polycarbonate/polyvinyl alcohol thin‐film membrane for enhanced water treatment

Etemadi

Khezraqa

Hermani

2022

Polymer Engineering & Sci

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ZnO nanoparticles were functionalized with amine groups and incorporated into a thin-film nanocomposite (TFN) membrane. Polycarbonate (PC) membranes were coated with polyvinyl alcohol (PVA)/ZnO-NH 2 solution using the dip-coating method. All prepared membranes were applied for the removal of humic acid (HA) in a submerged membrane system at vacuum transmembrane pressure (TMP) of 0.3 and 0.6 bar. Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) and field-emission scanning electron microscopy (FESEM) images confirmed the formation of PVA/ZnO-NH 2 top layer on the PC support membrane. The addition of nanoparticles caused the hydrophilicity and surface roughness of TFN membranes to increase. HA filtration experiments revealed that at lower vacuum TMP, the TFN with 0.05 wt.% of ZnO-NH 2 nanoparticles showed higher permeate flux. However, at higher vacuum TMP permeate flux significantly decreased. HA rejection did not change with added nanoparticles. As a final result, when vacuum TMP increased from 0.3 to 0.6 bar, rejection of HA slightly increased from 98.3% to 99.1% and 98.3% to 99.3% for thin film composite and TFN with 0.05 wt.% of nanoparticles, respectively.

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“…Moreover, the signals of C=O and C─O bonds in PC membrane appeared at 1768 cm −1 and 1200 cm −1 , respectively. [ 34 ] For the PC‐PU blend membrane, the signals about 1730 cm −1 and 3350 cm −1 can be assigned to C═O bonds and also hydroxyl species (OH) in the structure of PU, respectively. [ 35, 36 ] According to Figure 1 and for the PC‐PU/Al 2 O 3 nanocomposite membrane, all peaks for PC membrane are observable while the signals near 3350 cm −1 as well as 3500 cm −1 can be assigned to the OH group in the PU structure and the Al‐OH bond due to presence of the Al 2 O 3 nanoparticle, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of alumina nanoparticles on the antifouling properties of polycarbonate‐polyurethane blend ultrafiltration membrane for water treatment

Etemadi

Afsharkia

Zinatloo-Ajabshir

et al. 2021

Polymer Engineering & Sci

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In this work, the flexibility of polycarbonate (PC) membrane was improved by using polyurethane (PU) additive. However, due to the hydrophobic nature of the PU polymer, alumina (Al2O3) nanoparticles were incorporated to PC‐PU blend membrane. The prepared membranes have been used in a submerged membrane system to eliminate humic acid molecules from polluted water in both the presence and absence of coagulant (polyaluminum chloride). The obtained results showed that introduction of PU into PC membrane diminished hydrophilicity and enhanced porosity. Moreover, the flexibility of the PC membrane remarkably improved. Introduction of 1.5 wt% Al2O3 to the PC‐PU blend membrane led to enhancement in both porosity and hydrophilicity. Results of morphological studies showed that in the presence of Al2O3 nanostructures, finger‐shaped voids seemed to elongate across the entire thickness of the prepared membrane. Atomic force microscopy images showed that incorporation of PU and Al2O3 to the PC membrane resulted in a smoother surface. The antifouling performance of membranes revealed that the PC‐PU/Al2O3 nanocomposite membrane possessed the most favorable antifouling features owing to its lowest surface roughness as well as highest hydrophilicity. For all membranes utilizing coagulant (PAC), the irreversible fouling ratio and the flux recovery ratio significantly diminished and increased, respectively.

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Green and inexpensive method to recover Bisphenol-A from polycarbonate wastes

Cited by 24 publications

References 17 publications

Degradation study of BPA-containing plastics in water samples collected from an urban reservoir

Degradation study of BPA-containing plastics in water samples collected from an urban reservoir

Incorporation of amino‐functionalized ZnO nanoparticles into polycarbonate/polyvinyl alcohol thin‐film membrane for enhanced water treatment

Effect of alumina nanoparticles on the antifouling properties of polycarbonate‐polyurethane blend ultrafiltration membrane for water treatment

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