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Tytuł:
Kinetics of the Photocatalytic Decomposition of Bisphenol A on Modified Photocatalysts
Autorzy:
Zawadzki, P.
Kudlek, E.
Dudziak, M.
Powiązania:
https://bibliotekanauki.pl/articles/124140.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
kinetics
photocatalysis
modified photocatalysts
bisphenol A
Opis:
This paper presents the evaluation of the photocatalytic kinetics of bisphenol A decomposition in the presence of commercial titanium(IV) oxide and modified photocatalysts (composites). The following modification methods were used: mechanical mixing, calcination and impregnation. The decomposition process was carried out with the addition of photocatalysts and activated carbon at doses of 100 mg/dm3 and 25 mg/dm3, respectively. The photocatalytic process was performed in a reactor from the Heraeus Company (Warsaw, Poland) with a volume of 0.7 dm3. The reactor was equipped with an immersed medium-pressure mercury lamp with a power of 150 W (λ = 200–580 nm). The degree of bisphenol A decomposition was determined by chromatographic analysis preceded by solid-phase extraction SPE. The qualitative-quantitative analysis was performed using a high-performance liquid chromatograph HPLC (UV detector, λ = 218 nm) from Varian (Warsaw, Poland). The dependence of the BPA decomposition on the duration of irradiation was found, wherein the modified photocatalysts were the most effective (from 75 to 90% after 15 minutes). The order of photocatalyst efficiency has been proposed as follows: TiO2<.sub> < TiO2/AC < Cdextran-TiO2/AC < Cmethanol-TiO2/AC< Cethanol-TiO2/AC < TiO2-AC. The highest degree of decomposition was observed in the presence of TiO2/AC (99%). Numerous studies suggest that the results of the TiO2 photocatalytic oxidation of organic substances fit well with the Langmuir–Hinshelwood (L–H) kinetic model. The kinetic parameters of the photocatalysis process were carried out according to the L-H model. According to the pseudo-first-order parameters, the results showed that the decomposition of bisphenol A was most intensive in the first 15 minutes of the process.
Źródło:
Journal of Ecological Engineering; 2018, 19, 4; 260-268
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential of various materials for adsorption of micropollutants from wastewater
Autorzy:
Kamińska, G.
Bohdziewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/208072.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sorption
nanomaterials
bisphenol A
sorpcja
nanomateriały
bisfenol A
Opis:
Performance of various materials such as activated carbons, carbon nanotubes, fullerene, and aluminosilicate for aquatic adsorption of micropollutants has been compared. Micropollutants (bisphenol A (BPA) and nonylphenol (NP)) were removed from artificial effluent which was spiked with standards of those chemicals. It was found that nonylphenol was more favorable adsorbed by all the sorbents than BPA. The higher adsorption capacities for BPA and NP showed single walled carbon nanotubes and activated carbon (AKPA). Slightly lower removal efficiencies of the studied micropollutants were observed for the multi-walled carbon nanotubes and activated carbon SX2. Taking into account the porous structure of the sorbents, it can be concluded that the materials containing mesopores had lower sorption capacities for BPA and NP than materials with microporous structure. Ad-sorption of micropollutants was much quicker for the carbon nanotubes than for the activated carbon.
Źródło:
Environment Protection Engineering; 2016, 42, 4; 161-178
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Knowledge, attitude and practice on exposure to Bisphenol A among dental surgeons in Southern India
Autorzy:
Kumar, H.A.
Soans, C.R.
Murali, P.S.
Ravi, R.S.
Shashidhar, K.
Shersha, S.
Powiązania:
https://bibliotekanauki.pl/articles/2082822.pdf
Data publikacji:
2021
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
knowledge
attitude
practice
Bisphenol A
composite
dental surgeons
Opis:
Background. Bisphenol A (BPA) is a product in the manufacture of Bis-GMA, which is commonly used in dentistry, and is known to have a number of adverse effects. Objectives. The aim of this study is to evaluate to assess the knowledge, attitude and practice based on exposure and handling of BPA containing materials among dental surgeons for better understanding about the level of care rendered to the patients. Material and methods. A questionnaire survey was conducted on 400 dental surgeons in Southern India. The questionnaire consisted of 20 objective type questions out of which ten questions assessed knowledge and five questions assessed the attitude and five questions to understand the practice related measures taken by the dentist. The data collected were analysed using SPSS version 23. Results. A total of 402 responses were collected for this online questionnaire survey over a period of 2 months. It was found that females showed higher knowledge and attitude towards exposure to BPA which was statistically significant when compared to males. It showed that dentists with more than 20 years of practice had a higher level of knowledge. Though most of the groups agreed fairly on safety practice to be undertaken related to BPA exposure in their clinics, the ones with experience more than 20 years displayed the least positive attitude and dentists with 6-10 years of practice had the least positive behaviour among all. Conclusions. In spite of having a good knowledge regarding the harmful effects of BPA, dental surgeons are not very cautious while using materials containing them on a regular basis. Therefore, there is a need to enhance the awareness with the help of Continuing Dental Education programs or proper instructions on the packaging.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2021, 72, 4; 443-451
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of bisphenol A on growth, pigment composition and photosystem II activity of Arabidopsis thaliana
Autorzy:
Rąpała, Michał
Pluciński, Bartosz
Jedynak, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/1038576.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
BPA
bisphenol A
Arabidopsis thaliana
seedlings
plants
chlorophyll
Opis:
Bisphenol A (BPA) is a widely used chemical, that can potentially be toxic to plants. In this study we examined the toxicity of 5-50 mg/l of BPA on Arabidopsis thaliana. Additionally, the effects of 0.5-5 mg/l of BPA were examined after four weeks of development. BPA had no effect on the germination rate and the chlorophyll a/b ratio. The chlorophyll a and carotenoid content was significantly elevated in seedlings treated with 5 mg/l of BPA. In 4-week-old plants there was no change in the chlorophyll and carotenoid content and photosynthetic parameters (Fv/Fm, Fv/F0 and PI) were unaffected, which suggests no photoinhibition. No oxidative stress symptoms were observed. BPA significantly decreased leaf protein content. A low concentration of BPA seems to have no significant effect on A. thaliana flowering, but further investigation is needed. The results obtained indicate that a low concentration of BPA has no negative effect on the growth and development of A. thaliana.
Źródło:
Acta Biochimica Polonica; 2017, 64, 3; 407-413
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bisphenol A – Application, sources of exposure and potential risks in infants, children and pregnant women
Autorzy:
Mikołajewska, Karolina
Stragierowicz, Joanna
Gromadzińska, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/2177413.pdf
Data publikacji:
2015-04-07
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
Bisphenol A
exposure
children
pregnant women
dietary exposure
neurodevelopment
Opis:
Bisphenol A (BPA) is used in the chemical industry as a monomer in the production of plastics. It belongs to a group of compounds that disturb some of the functions of human body, the endocrine system in particular. Extensive use of BPA in manufacturing products that come in contact with food increases the risk of exposure to this compound, mainly through the digestive tract. Literature data indicate that exposure to bisphenol A even at low doses may result in adverse health effects. The greatest exposure to BPA is estimated among infants, children and pregnant women. The aim of this review is to show potential sources of exposure to bisphenol A and the adverse health effects caused by exposure to this compound in the group of particular risk.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 2; 209-241
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elimination of Bisphenol A from Wastewater through Membrane Filtration Processes
Autorzy:
Dudziak, M.
Kudlek, E.
Łaskawiec, E.
Felis, E.
Kowalska, K.
Garbaczewski, L.
Powiązania:
https://bibliotekanauki.pl/articles/123664.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
wastewater treatment
bisphenol A
ultrafiltration
reverse osmosis
complex purification process
Opis:
New priorities for the environment have resulted in a reassessment of modern technology for treatment of urban wastewater. Urban wastewater treatment mainly involves the elimination or reduction of anthropogenic organic micropollutants in the aquatic environment. In this paper, the effectiveness of bisphenol A elimination from wastewater, after biological treatment, through a complex ultrafiltration/reverse osmosis purification process was evaluated. The effectiveness of the wastewater treatment process in the tested system was also evaluated with a number of other physical and chemical analyses for pH, turbidity, colour, absorbance, TOC, phenol index, conductivity and the concentration of selected heavy metals. Within this study, the change in the hydraulic performance of the membranes was also investigated. The effectiveness of the reduction of bisphenol A concentrations during the process of ultrafiltration was small, due to the significant difference between the size of the pores of the membrane and the size of eliminated micropollutants. In the process of reverse osmosis, the wastewater treatment system reported that the concentration of bisphenol A was reduced by 68%. In the tested treatment system, the ultrafiltration/reverse osmosis completely removed colour, lead and chromium. Other contaminants were eliminated by more than 31%. In both membrane processes, there was evidence that the membrane pores were blocked, but this occurred to a greater extent during the process of reverse osmosis.
Źródło:
Journal of Ecological Engineering; 2018, 19, 1; 69-74
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental non-persistent endocrine-disrupting chemicals exposure and reproductive hormones levels in adult men
Autorzy:
Dziewirska, Emila
Hanke, Wojciech
Jurewicz, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2162010.pdf
Data publikacji:
2018-10-23
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
organophosphate pesticides
Bisphenol A
parabens
phthalates
pyrethroids
male reproductive health
Opis:
Non-persistent endocrine-disrupting chemicals (EDCs) are exogenous, man-made substances present in the environment that may interfere with the natural human hormones and may exert adverse consequences on human organism. Endocrinedisrupting chemicals have been suspected to be associated with altered reproductive function in the case of males and females. Environmental endocrine-disrupting non-persistent chemicals like parabens, phthalates, bisphenol A (BPA), synthetic pyrethroids and organophosphate pesticides are found in various products such as metal food cans, plastic bottles, detergents, personal care products or chemicals used for fighting against insects. The widespread distribution of these chemicals causes that humans are permanently exposed through multiple sources. The aim of this review is to summarize data linking non-persistent endocrine-disrupting chemicals exposure, and human, male reproductive hormones levels. The included studies were selected by searched PubMed, Web of Science and MEDLINE, original papers published from 2006 to 2016 and referring to human data were included to the review. The results of reviewed studies were not consistent, however, majority of the studies indicated that non-persistent EDCs may affect male reproductive hormones levels. Most findings suggest that exposure to environmental EDCs is negatively related to the level of testosterone (except for exposure to BPA which is positively associated). In most of the studies negative association was found between exposure to examined EDCs and free androgen index, too. Considering the suggested health effect of exposure to EDCs, more epidemiological data is needed. Int J Occup Med Environ Health 2018;31(5):551–573
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2018, 31, 5; 551-573
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health risk of exposure to bisphenol A (BPA)
Autorzy:
Konieczna, A.
Rutkowska, A.
Rachon, D.
Powiązania:
https://bibliotekanauki.pl/articles/876742.pdf
Data publikacji:
2015
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
human health
health risk
human exposure
bisphenol A
estrogen
endocrine disrupting compound
Opis:
Bisphenol A (BPA) belongs to chemicals that are produced in large quantities worldwide. It is commonly used as monomer in polycarbonate synthesis, plasticizer in the production of epoxy resins, as well as an additive for the elimination of surfeit of hydrochloric acid during the polyvinyl chloride (PVC) production. BPA is not only used in the production of plastics intended to a direct contact with food, including plastic packaging and kitchenware, but also in inner coatings of cans and jar caps. There are various routes of human exposure to this substance such as oral, by inhalation and transdermal. The main sources of exposure to BPA include food packaging and dust, dental materials, healthcare equipment, thermal paper, toys and articles for children and infants. BPA is metabolized in the liver to form bisphenol A glucuronide and mostly in this form is excreted with urine. Due to its phenolic structure BPA has been shown to interact with estrogen receptors and to act as agonist or antagonist via estrogen receptor (ER) dependent signalling pathways. Therefore, BPA has been shown to play a role in the pathogenesis of several endocrine disorders including female and male infertility, precocious puberty, hormone dependent tumours such as breast and prostate cancer and several metabolic disorders including polycystic ovary syndrome (PCOS). Because of the constant, daily exposure and its tendency to bio-accumulation, BPA seems to require special attention such as biomonitoring. This observation should include clinical tests of BPA concentration in the urine, which is not only one of the best methods of evaluation of the exposure to this compound, but also the dependence of the daily intake of BPA and the risk of some endocrine disorders.
Bisfenol A (BPA) należy do substancji chemicznych produkowanych na świecie w znacznych ilościach. Używany jest jako plastyfikator i półprodukt w syntezie żywic epoksydowych, tworzyw sztucznych poliwęglanowych oraz jako dodatek do usuwania nadmiaru kwasu chlorowodorowego przy produkcji polichlorku winylu (PCW). BPA nie tylko jest używany do syntezy tworzyw sztucznych służących do produkcji materiałów mających bezpośredni kontakt z żywnością, włączając opakowania z tworzyw sztucznych oraz sprzęt kuchenny, ale także stanowi składnik lakierów do pokrywania wewnętrznych powierzchni puszek metalowych przeznaczonych do żywności i napojów. BPA stosowany jest w produkcji poliwęglanów (PC) i żywic epoksydowych, wykorzystywanych w produkcji wyrobów do kontaktu z żywnością. Może być także stosowany, jako przeciwutleniacz i inhibitor w procesie polimeryzacji tworzyw sztucznych, m.in. polichlorku winylu (PCW). Narażenie na BPA może zachodzić drogą pokarmową, wziewną oraz przez skórę, a głównymi źródłami ekspozycji są opakowania żywności, kurz, materiały stomatologiczne, sprzęt medyczny, papier termiczny, a także zabawki i artykuły przeznaczone dla niemowląt i dzieci. BPA jest metabolizowany w wątrobie do glukuronianu bisfenolu A i w tej postaci jest usuwany z moczem. Ze względu na swą fenolową strukturę BPA wykazuje zdolność jako agonista lub antagonista do interakcji z receptorami estrogenowymi poprzez estrogenowe szlaki sygnalizacyjne. W wyniku takiego działania BPA odgrywa rolę w patogenezie zaburzeń endokrynnych włączając zaburzenia płodności u kobiet i mężczyzn, przedwczesne dojrzewanie, nowotwory hormonozależne, jak rak piersi oraz rak prostaty oraz schorzeń metabolicznych włączając zespół wielotorbielowatych jajników (PCOS). Biorąc pod uwagę stałe, codzienne narażenie na BPA z wielu źródeł oraz tendencje do bioakumulacji uzasadniony jest monitoring biologiczny tego związku. Powinien on w szczególności uwzględniać monitoring BPA w moczu, jako skuteczną metodę szacowania narażenia na ten związek, umożliwiając jednocześnie badanie zależności pomiędzy narażeniem na BPA a ryzykiem występowania niektórych chorób wynikających z zaburzenia czynności układu endokrynologicznego.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2015, 66, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BPA – an endocrine disrupting compound in water used for drinking purposes, a snapshot from South Poland
Autorzy:
Kmiecik, Ewa
Styszko, Katarzyna
Wątor, Katarzyna
Dwornik, Małgorzata
Tomaszewska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/184178.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
emerging contaminants
endocrine disrupting compounds
groundwater protection
groundwater domestic wells
bisphenol A
Opis:
Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics and epoxy resins. As an endocrine disrupting compound, it has been included in the list of substances requiring special supervision as a very high-risk substance due to its toxic influence on reproduction. BPA with a reference value of 0.01 μg/L was included in the Drinking Water Directive revision (DWD 2018). This paper presents the results of preliminary studies aimed at identifying the occurrence of BPA in different types of water, i.a. groundwater captured with house wells or flowing wells in a selected location in southern Poland. These waters are commonly used as a source of water intended for human consumption and their quality is not regularly controlled. Additional tests were carried out for surface water, as well as water from springs used for drinking purposes. The authors also analysed tap water from various sources, i.e. surface and groundwater, as the final product of the drinking water production cycle. The results indicate the presence of BPA in water and the necessity of a detailed study on the risk of the BPA occurring in groundwater, especially in domestic wells.
Źródło:
Geology, Geophysics and Environment; 2020, 46, 1; 5-16
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physico-chemical and Biological Techniques of Bisphenol A Removal in an Aqueous Solution
Autorzy:
Juan, Donald Anak
Hasan, Hassimi Abu
Muhamad, Mohd Hafizuddin
Abdullah, Siti Rozaimah Sheikh
Abu Bakar, Siti Nur Hatika
Buhari, Junaidah
Powiązania:
https://bibliotekanauki.pl/articles/1955560.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
physico-chemical technology
biological technology
bisphenol A
effective microbe
EM
epoxy resin
Opis:
Bisphenol A (BPA) is widely used in everyday life and can be found everywhere, including in the ecosystem and manufactured goods. BPA not only has a negative impact in low doses, but it also has biological and pathophysiological implications for obesity and hormonal effects. The objectives of this paper were to review the BPA removal technology and the factors that influence the BPA removal based on biological methods. BPA elimination from water is crucial for environmental protection, in terms of biological treatment. In addition, the future prospect of biological removal of BPA indicates that effective microorganism cultures could disturb the pathogen growth and increase composition rate of BPA. The biological technology by the implementation of microorganisms for the removal of BPA through break down of organic contaminants is straightforward, money saving, and widely acknowledged by the public.
Źródło:
Journal of Ecological Engineering; 2021, 22, 9; 136-148
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Change of toxicity of water containing bisphenol A during its treatment by complex oxidation process
Zmiany toksyczności wody zawierającej bisfenol a w trakcie jej uzdatniania w złożonym procesie utleniającym
Autorzy:
Dudziak, M.
Powiązania:
https://bibliotekanauki.pl/articles/388558.pdf
Data publikacji:
2014
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
bisphenol A
water treatment
toxicity
Microtox® biotest
bisfenol A
uzdatnianie wody
toksyczność
biotest Microtox®
Opis:
Water containing bisphenol A was UV irradiated (medium pressure immersion lamp with the electric power of 150 W) with and without the addition of H2O2 (6–12 mg/dm3 dose). To control of the water quality Microtox® biotest was used. Bioluminescent bacteria Vibrio fisheri was involved. Decomposition of bisphenol A was depended on the UV irradiation time and dose of the H2O2. The observations connected with the bioluminescence value in the examined solutions were surprised. Decomposition of the compound did not cause of decrement the bioluminescence inhibition value characterizing solution indicating the formation of toxic intermediates products. However, the combined use of H2O2 with UV radiation improves the rate of decomposition of bisphenol A, but also causes an increase in bioluminescence inhibition of the solutions. For this reason selection of the most favorable conditions for the oxidative process have to be proceed based on both agents: effectiveness of the compounds decomposition and the toxicity of the solution after process.
Wodę zawierającą bisfenol A poddano napromieniowaniu UV (zanurzeniowa lampa średniociśnieniowa o mocy elektrycznej 150 W) bez i z dodatkiem H2O2 (dawka 6–12 mg/dm3). Do kontroli jakości wody zastosowano biotest Microtox® wykorzystujący bakterie bioluminescencyjne Vibrio fisheri. Określono, że rozkład bisfenolu A zależał od czasu napromieniowania UV jak i dawki H2O2. Zaskakujące z kolei były obserwacje związane z wartością inhibicji bioluminescencji w badanych roztworach. Rozkład związku nie powodował obniżenia wartości inhibicji bioluminescencji charakteryzującej roztwór, co wskazuje na powstawanie toksycznych produktów pośrednich. Z kolei łączne zastosowanie nadtlenku wodoru z promieniowaniem UV poprawia stopień rozkładu bisfenolu A, ale jednocześnie powoduje wzrost wartości inhibicji bioluminescencji roztworów. Z tego względu w doborze najkorzystniejszych warunków prowadzenia procesu utleniającego nie można opierać się wyłącznie na skuteczności rozkładu związków, lecz należy również rozważyć toksyczność roztworu poprocesowego.
Źródło:
Ecological Chemistry and Engineering. A; 2014, 21, 3; 269-277
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pilot study of contact sensitization to rubber allergens and bisphenol A amongst dental students
Autorzy:
Lyapina, Maya G.
Krasteva, Assya
Dencheva, Maria
Tzekova, Mariana
Nikolov, Georgy
Yaneva-Deliverska, Mariela
Kisselova-Yaneva, Angelina
Powiązania:
https://bibliotekanauki.pl/articles/2161876.pdf
Data publikacji:
2017-05-08
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
allergic contact dermatitis
dentistry students
carba mix
mercapto mix
thiuram mix
Bisphenol A
Opis:
Objectives The aim of this study has been to evaluate the rate of contact sensitization to some rubber allergens and to bisphenol A (BPA) amongst students of dental medicine and dental patients. Material and Methods A total of 50 participants were included in the study: 40 students of dental medicine exposed to the studied rubber allergens and BPA-based dental materials during the course of their education; 10 dental patients without occupational exposure to the latter substances served as a control group. All of them were patch-tested with the studied rubber allergens and bisphenol A. Results Highest was the sensitizing action of carba mix, followed by benzoyl peroxide and mercapto mix. The sensitization rate for carba mix was significantly higher for dental students as well as for the whole studied population, if compared to the one for thiuram mix (Chi² = 12.9, p < 0.001; Chi² = 13.9, p < 0.001), bisphenol A (Chi² = 8.9, p < 0.001; Chi² = 11.9, p < 0.001), toluenesulfonamide formaldehyde resin (Chi² = 10.7, p < 0.001; Chi² = 13.9, p < 0.001) and benzoyl peroxide (Chi² = 4.7, p = 0.03; Chi² = 5.8, p = 0.016), and for dental patients, if compared to the one for mercapto mix (Chi² = 7.07, p = 0.008). Concomitant positive skin patch-test reactions to carba mix and to benzoyl peroxide, and to all the studied allergens were established. Conclusions Carba mix could be outlined as a sensitizer of paramount importance for dental students as well as for dental patients. Benzoyl peroxide was the second ranked sensitizer for dental students. Positive skin patch-test reactions to bisphenol A and toluenesulfonamide formaldehyde resin were established only among the group of dental students. Int J Occup Med Environ Health 2017;30(3):397–405
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2017, 30, 3; 397-405
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prenatal imprinting by environmental toxicants: really an important issue?
Prenatalne naznaczenie genetyczne (imprinting) wywołane przez toksyny środowiskowe – czy rzeczywiście ważna sprawa?
Autorzy:
v. Mühlendahl,, Karl Ernst
Otto, Matthias
Powiązania:
https://bibliotekanauki.pl/articles/1177574.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Tematy:
"PCB"
"PCDD/F"
"bisphenol A"
"endocrine disruptors"
"phthalates"
"prenatal imprinting of sexual behaviour"
Opis:
Prenatal imprinting of sexual behaviour and of other traits by environmental toxicants has been one important topic in the ongoing discussions in environmental medicine. This review of the literature shows that, so far, concrete data are sparse and, in part, contradictory.
Prenatalne naznaczenie, czyli imprinting zachowania seksualnego i innych cech wywołane toksynami środowiskowymi było ważnym tematem w toczących się dyskusjach w medycynie środowiskowej. Przegląd dotychczasowego piśmiennictwa wykazuje, że udokumentowane dane są skąpe i w części sprzeczne.
Źródło:
Medycyna Środowiskowa - Environmental Medicine; 2015, 18, 2; 7-10
1505-7054
2084-6312
Pojawia się w:
Medycyna Środowiskowa - Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the aquatic environment conditions on the decomposition of bisphenol A
Wpływ warunków środowiska wodnego na rozkład bisfenolu A
Autorzy:
Dudziak, M.
Powiązania:
https://bibliotekanauki.pl/articles/388587.pdf
Data publikacji:
2017
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
bisphenol A
aquatic environment
decomposition
solution toxicity
biodegradation
bisfenol A
środowisko wodne
rozkład
toksyczność roztworu
biodegradacja
Opis:
Bisphenol A is a compound used to produce plastics. Today, it is identified in the aquatic environment. As part of the work there are performed studies to determine the effect of the aquatic environment conditions on the decomposition of bisphenol A. As the subject of research there were used different aqueous solutions prepared on the basis of deionized or surface water with addition of a bisphenol A standard at concentration of 1 mg/dm3. To the selected solutions it was added the mineral medium or surface water, which was the source of both organic materials and inorganic compounds and microorganisms. Optionally, the selected solutions had been kept in the dark or in the light of sun, and they had been aerated. Solutions after biodegradation were also subjected of the toxicological evaluation with application of the enzymatic test using bioluminescent bacteria Aliivibrio fischeri, survival test using shellfish Daphnia magna and the growth test of aquatic plant Lemna minor. It was determined that the decomposition of bisphenol A in an aquatic environment is low and it is mainly under the influence of sunlight, with the participation of microorganisms. The presence of mineral salts in aquatic environment is also important. on the other hand, the toxicological assessment of solutions, which was made during testing biodegradation, showed that they have a different toxicity. Toxicity class of the solution also depended on the type of applied indicator, which proves their differences in sensitivity to bisphenol A. High toxicity was noted in the case of bioluminescent bacteria Aliivibrio fischeri after 14 days of the biodegradation study.
Bisfenol A to związek chemiczny stosowany do produkcji tworzyw sztucznych. Współcześnie identyfikowany jest on w środowisku wodnym. W ramach pracy podjęto badania dotyczące oceny wpływu warunków środowiska wodnego na rozkład bisfenolu A. Przedmiot badań stanowiły różne roztwory wodne sporządzone na bazie wody zdejonizowanej lub powierzchniowej z dodatkiem wzorca bisfenolu A w stężeniu 1 mg/dm3. Do wybranych roztworów dodawano pożywkę mineralną lub wodę powierzchniową, która to stanowi ła źródło zarówno substancji organicznych, jak i nieorganicznych oraz mikroorganizmów. Opcjonalnie wybrane roztwory były przetrzymywane w ciemni lub w świetle słonecznym oraz napowietrzane. Roztwory po biodegradacji poddano również ocenie toksykologicznej z użyciem testu enzymatycznego z bakteriami bioluminescencyjnymi Aliivibrio fischeri, testu przeżywalności ze skorupiakami Daphnia magna oraz testu wzrostowego z rośliną wodną Lemna minor. Określono, że rozkład bisfenolu A w środowisku wodnym jest niewielki i zachodzi głównie pod wpływem światła słonecznego przy udziale mikroorganizmów. Istotna jest również obecność w środowisku wodnym soli mineralnych. Natomiast dokonana ocena toksykologiczna roztworów podczas badań biodegradacyjnych wykazała, że charakteryzują się one różną toksycznością. Klasa toksyczności roztworu zależała także od rodzaju użytego organizmu wskaźnikowego, co dowodzi o ich różnej wrażliwości na działanie bisfenolu A. Wysoką toksyczność odnotowano w przypadku bakterii bioluminescencyjnymi Aliivibrio fischeri po 14 dobach trwania badań biodegradacyjnych.
Źródło:
Ecological Chemistry and Engineering. A; 2017, 24, 2; 207-216
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of bisphenol a from aqueous solutionsby activated tyre pyrolysis char – Effect of physicaland chemical activation
Autorzy:
Kuśmierek, Krzysztof
Świątkowski, Andrzej
Kotkowski, Tomasz
Cherbański, Robert
Molga, Eugeniusz
Powiązania:
https://bibliotekanauki.pl/articles/184855.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bisphenol A
adsorption
tyre pyrolysis
char
physical activation
chemical activation
bisfenol A
adsorpcja
piroliza opon
aktywacja fizyczna
aktywacja chemiczna
Opis:
This paper aims to show the effect of activation method of tyre pyrolysis char (TPC) on adsorptionof bisphenol A (BPA) from aqueous solutions. The TPC was produced from end-of-life-tyres (ELT)feedstock in a pilot plant at 773 K. Activation was accomplished using two classical methods: physicalactivation with CO2and chemical activation with KOH. The two produced adsorbents had pores rangingfrom micro- to macropores. Distinct differences in the BET surface areas and pore volumes betweenthe adsorbents were displayed showing better performance of the chemically activated adsorbent foradsorption of BPA from water.The results of the kinetic studies showed that the adsorption of BPA followed pseudo-second-orderkinetic model. The Freundlich, Langmuir, Langmuir–Freundlich and Redlich–Peterson isotherm equa-tions were used for description of the adsorption data. The Langmuir–Freundlich isotherm model bestfits the experimental data for the BPA adsorption on both adsorbents. The Langmuir–Freundlichmonolayer adsorption capacity,qmLF, obtained for the CO2-activated tyre pyrolysis char (AP-CO2)and KOH-activated tyre pyrolysis char (AP-KOH) were 0.473 and 0.969 mmol g
Źródło:
Chemical and Process Engineering; 2020, 41, 2; 129--141
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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