• Title/Summary/Keyword: Bisphenol A

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Characteristics of Surface Modified Activated Carbons Prepared Using P2O5 and Their Adsorptivity of Bisphenol A (P2O5로 표면 개질한 활성탄의 특성 및 Bisphenol A의 흡착능)

  • Lee, Min-Gyu;Kim, Myeong-Chan;Kam, Sang-Kyu
    • Journal of Environmental Science International
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    • v.24 no.11
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    • pp.1463-1471
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    • 2015
  • The surface modified activated carbons (SMACs) were prepared with various $P_2O_5$ concentrations using two activated carbons (ACs: waste citrus peel-based activated carbon and coconut-based activated carbon). The characteristics and adsorptivity of bisphenol A (one of phenolic endocrine disrupting chemicals) were compared between ACs and SMACs. The contents of C, H and N of SMACs were similar to those of ACs, but the content of $P_2O_5$ for the former increased greatly than for the latter, due to the impregnation of $P_2O_5$ into the pores. The specific surface area, total pore volume, average pore diameter and iodine adsorptivity for the former decreased due to the impregnation of $P_2O_5$ into the pores, compared to those for the latter. The adsorptivity of bisphenol A for the former were higher than that for the latter, although specific surface area, total pore volume, average pore diameter and iodine adsorptivity for the former were lower than those for the latter.

SBA-15 Supported Fe, Ni, Fe-Ni Bimetallic Catalysts for Wet Oxidation of Bisphenol-A

  • Mayani, Suranjana V.;Mayani, Vishal J.;Kim, Sang Wook
    • Bulletin of the Korean Chemical Society
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    • v.35 no.12
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    • pp.3535-3541
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    • 2014
  • Bisphenol A is considered as pollutant, because it is toxic and hazardous to living organisms even at very low concentrations. Biological oxidation used for removing this organic from waste water is not suitable and consequently application of catalytic wet oxidation has been considered as one of the best options for treating bisphenol A. We have developed Fe/SBA-15, Ni/SBA-15 and Fe-Ni/SBA-15 as heterogeneous catalysts using the advanced impregnation method for oxidation of bisphenol A in water. The catalysts were characterized with physico-chemical characterization methods such as, powder X-ray diffraction (PXRD), FT-IR measurements, N2 adsorption-desorption isotherm, thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis. This work illustrates activity of the catalysts for heterogeneous catalytic degradation reaction revealed with excellent conversion and recyclability. The degradation products identified were not persistent pollutants. GC-MS analysis identified the products: 2,4-hexadienedioic acid, 2,4-pentadienic acid and isopropanol or acetic acid. The leachability study indicated that the catalysts release very little metals to water. Therefore, the possibility of water contamination through metal leaching was almost negligible.

GC/MS-SIM for the Determination of Alkylphenols, Chlorophenols and Bisphenol A in Paper Materials

  • Kim, Hyub
    • Proceedings of the Korea Society of Environmental Toocicology Conference
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    • 2003.05a
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    • pp.145-145
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    • 2003
  • A method for the determination of alkylphenols, chlorophenols and bisphenol A in paper materials using GC/MS-SIM has been developed. Eleven endocrine disrupting chemicals (EDCs) of phenols in paper samples were extracted with acetonitrile. Also, solid-phase extraction (SPE) with XAD-4 and subsequent conversion to isobutoxycarbonyl derivatives or tert.-butyldimethylsilyl derivatives for sensitive analysis with the selected ion-monitoring (SIM) mode. The recoveries were 82.4∼108.8 % by area ratio of pheranthrene-d$\sub$10/ vs bisphenol A d$\sub$l6/. (isoBOC derivatization and TBDMS derivatization) The SIM responses were linear with the correlation coefficient varying 0.9717∼0.9995 (isoBOC derivatization), and 0.9842∼0.9980 (TBDMS derivatization). The range of concentrations was respectively, 0.95∼l.44 ng/g in 2,4-dichlorophenol, 1.01∼1.17 ng/g in t-butylphenol, 2.17∼5.84 ng/g in pentachlorophenol, 12.68∼14.88 ng/g in nonylphenol and 30.84∼153.72 ng/g in bisphenol A.

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Effects of Bisphenol A Removal by TiO2 Photodegradation in Water on Development and Maturate Stage of Zebrafish(Danio Rerio) (수용액에서 TiO2 광분해법에 의한 비스페놀 A 분해과정이 Zebrafish의 발생과 성숙기에 미치는 영향)

  • Yeo, Min-Kyeong;Lee, Joo-Young
    • Journal of Environmental Science International
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    • v.15 no.5
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    • pp.471-477
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    • 2006
  • We investigated the relationship between the $TiO_2$ photocatalytic decomposition of bisphenol A in water and biological toxicity to zebrafish (Danio rerio) during $1\sim28$ weeks post development stage. The bisphenol A in water was completely degraded by the $TiO_2$ photocatalysis in 50 hours. After the photocatalysis, no toxic effects on the morphogenesis of the zebrafish were observed during the development, growth, and maturate stages. Catalase activity of control group was not different from $1\sim5$ week post fertilized group. However, toxic effect on the catalase activity of adult stage(28 weeks) decreased 50% than control group.

Vitellogenin mRNA Induction in Male Carp Treated with Bisphenol A (비스페놀A 처리 수컷 잉어에서 비텔로제닌 mRNA의 발현)

  • 박응로;최필선;이철우;류지성;남성숙;류홍일;전성환;나진균;박광식
    • Toxicological Research
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    • v.17 no.3
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    • pp.181-186
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    • 2001
  • The estrogenic potency of bisphenol A using reverse trancriptase-PCR response of liver vitellogenin mRNA in male carp was studied. For this, six combination of primers which were synthesized on the basis of cDNA consensus region of various species, were evaluated and one pair of primers was selected as the best to show 286 bp size-transcript. By using the selected primers, vitellogenin mRNA induction in carp treated with bisphenol A was measured and the chemical showed dose-and time-dependent Induction response. From this result, it was concluded that RT-PCR technique wing the selected primers in this study can be wed to monitor the estrogenic effects exerted In carp living in Korean freshwater.

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Application of Manganese Oxide for the Oxidative Degradation of Bisphenol-A in Aqueous Phase (망간산화물을 이용한 수용액내 Bisphenol-A의 산화 반응성 평가)

  • Jee, Sang-Hyun;Ko, Seok-Oh
    • Journal of Korean Society on Water Environment
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    • v.23 no.5
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    • pp.659-664
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    • 2007
  • The objective of this study is to evaluate the detoxification method for the endocrine disrupting chemicals by manganese oxide. Manganese coated sand and bisphenol-A (BPA) was used as the reactive medium and the contaminant. Results showed that manganese oxide effectively degrades BPA by oxidative coupling reaction. The nonlinear oxidative coupling reaction orders were obtained for BPA and oxide, respectively. The reaction rate of BPA decreased as initial BPA concentration increased, as oxide loading decreased and as pH increased. The higher ionic strength, the higher reaction rate was observed. Divalent cations were adsorbed on the oxide surfaces, resulting in the decreased degradation rate of BPA.

Biodegradation of Endocrine-disrupting Phenolic Compounds Using Laccase Followed by Activated Sludge Treatment

  • Nakamura, Yoshitoshi;Mtui, Godliving
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.8 no.5
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    • pp.294-298
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    • 2003
  • Endocrine-disrupting phenolic compounds in the water were degraded by laccase from Trametes sp. followed by activated sludge treatment. The effect of temperature on the degradation of phenolic compounds and the production of organic compounds were investigated using endocrine-disrupting chemicals such as bisphenol A, 2.4-dichlorophenol, and diethyl phthalate. Bisphenol A and 2.4-dichlorophenol disappeared completely after the laccase treatment, but no disappearance of diethyl phthalate was observed. The Michaelis-Menten type equation was proposed to represent the degradation rate of bisphenol A by the lacasse under various temperatures. After the laccase treatment of endocrine-disrupting chemicals, the activated sludge treatment was attempted and it could convert about 85 and 75% of organic compounds produced from bisphenol A and 2.4-dichlorophenol into H$_2$O and CO$_2$, respectively.

Electrochemical Determination of Bisphenol A Concentrations using Nanocomposites Featuring Multi-walled Carbon Nanotube, Polyelectrolyte and Tyrosinase (다중벽 탄소 나노 튜브, 전도성고분자 및 티로시나아제 효소로 구성된 나노복합체를 이용한 비스페놀A 맞춤형의 전기화학적 검출법)

  • Ku, Nayeong;Byeon, Ayeong;Lee, Hye Jin
    • Applied Chemistry for Engineering
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    • v.32 no.6
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    • pp.684-689
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    • 2021
  • In this paper, we develop a cost effective and disposable voltammetric sensing platform involving screen-printed carbon electrode (SPCE) modified with the nanocomposites composed of multi-walled carbon nanotubes, polyelectrolyte, and tyrosinase for bisphenol A. This is known as an endocrine disruptor which is also related to chronic diseases such as obesity, diabetes, cardiovascular and female reproductive diseases, precocious puberty, and infertility. A negatively charged oxidized multi-walled carbon nanotubes (MWCNTs) wrapped with a positively charged polyelectrolyte, e.g., polydiallyldimethylammonium, was first wrapped with a negatively charged tyrosinae layer via electrostatic interaction and assembled onto oxygen plasma treated SPCE. The nanocomposite modified SPCE was then immersed into different concentrations of bisphenol A for a given time where the tyrosinase reacted with OH group in the bisphenol A to produce the product, 4,4'-isopropylidenebis(1,2-benzoquinone). Cyclic and differential pulse voltammetries at the potential of -0.08 V vs. Ag/AgCl was employed and peak current changes responsible to the reduction of 4,4'-isopropylidenebis(1,2-benzoquinone) were measured which linearly increased with respect to the bisphenol A concentration. In addition, the SPCE based sensor showed excellent selectivity toward an interferent agent, bisphenol S, which has a very similar structure. Finally, the sensor was applied to the analysis of bisphenol A present in an environmental sample solution prepared in our laboratory.

Screening of Peptide Sequences with Affinity to Bisphenol A by Biopanning (바이오패닝에 의한 Bisphenol A 친화성 펩타이드 서열의 탐색)

  • Yoo, Ik-Keun;Choe, Woo-Seok
    • Korean Journal of Microbiology
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    • v.49 no.2
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    • pp.211-214
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    • 2013
  • Bisphenol A (BPA) is a highly hazardous component to human since it is regarded as one of endocrine disruptors. For the analysis and/or removal of BPA, the searching for the specific ligand with a selective affinity to target BPA is required. In order to find the peptide moiety that specifically binds to BPA, the ultrasound-assisted biopanning was carried out with a phage-displayed peptide library expressing constrained heptamer. After six rounds of positive screening against BPA particles followed by the negative screening against the surface of eppendorf tube, the peptide sequence (CysLysSerLeuGluAsnSerTyrCys) with affinity to BPA was screened based on the order of frequency from the screened phage clones. To further verify the specificity of screened peptide sequence, the cross-binding affinity of the phage peptide toward BPA analogues such as Bisphenol S (BPS) and Bisphenol F (BPF) was also assessed, where the selected phage peptide showed a higher affinity to BPA over BPS and BPF.