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https://www.readbyqxmd.com/read/28803145/plasmix-management-lca-of-six-possible-scenarios
#1
R Cossu, F Garbo, F Girotto, F Simion, A Pivato
Only a small percentage of the separately collected plastic is recycled. The mechanical selection process of source segregated plastic materials generates considerable amounts of residues that are commonly named as Plasmix. By means of a life cycle assessment (LCA) modelling, the environmental performances of the main Plasmix management options (thermal treatment, energy recovery, and landfilling) were compared. Six treatment scenarios, with different pre-treatment alternatives, were evaluated. Landfilling after waste washing and Plasmix substitution of coke in a blast furnace represent the most favorable options, since the performances of thermal treatment and energy recovery are worsened by specific emissions of a variety of toxic compounds and heavy metals within plastic materials as additives...
August 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28751028/toxic-metals-biomonitoring-based-on-prey-predator-interactions-and-environmental-forensics-techniques-a-study-at-the-romanian-ukraine-cross-border-of-the-black-sea
#2
Stefan-Adrian Strungaru, Mircea Nicoara, Carmen Teodosiu, Dragos Micu, Gabriel Plavan
Marine cross-border areas are ideal for monitoring pollutants so as to increase ecosystems protection. This study was conducted at the Romanian-Ukraine border of the Black Sea to reveal evidence of contamination with toxic metals based on biomonitoring of: cadmium, lead, total chromium, nickel and copper at different water depths and prey-predator interactions, combined with environmental forensics techniques of biological sampling and separation in witnesses size groups. The species used were Mytilus galloprovincialis L...
July 25, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28735402/determination-of-total-sulfur-sulfate-sulfite-thiosulfate-and-sulfolipids-in-plants
#3
Assylay Kurmanbayeva, Galina Brychkova, Aizat Bekturova, Inna Khozin, Dominic Standing, Dmitry Yarmolinsky, Moshe Sagi
In response to oxidative stress the biosynthesis of the ROS scavenger, glutathione is induced. This requires the induction of the sulfate reduction pathway for an adequate supply of cysteine, the precursor for glutathione. Cysteine also acts as the sulfur donor for the sulfuration of the molybdenum cofactor, crucial for the last step of ABA biosynthesis. Sulfate and sulfite are, respectively, the precursor and intermediate for cysteine biosynthesis and there is evidence for stress-induced sulfate uptake and further downstream, enhanced sulfite generation by 5'-phosphosulfate (APS) reductase (APR, EC 1...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28654789/utilization-of-zn-containing-electric-arc-furnace-dust-for-multi-metal-doped-ferrite-with-enhanced-magnetic-property-from-hazardous-solid-waste-to-green-product
#4
Hui-Gang Wang, Mei Zhang, Min Guo
One-step solid state reaction method was proposed for the first time to realize the transformation of the Zn-containing EAFD from hazardous solid waste to multi-metal doped ferrite with enhanced magnetic property. The effect of Zn-containing EAFD to NiCl2·6H2O mass ratio (RZE/N, g·g(-1)) on the phases transformation was investigated by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Raman spectroscopy. The as-synthesized samples were treated by toxicity characteristic leaching procedure (TCLP)...
June 20, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28627883/mechanism-of-vanadium-leaching-during-surface-weathering-of-basic-oxygen-furnace-steel-slag-blocks-a-microfocus-x-ray-absorption-spectroscopy-and-electron-microscopy-study
#5
Andrew J Hobson, Douglas I Stewart, Andrew W Bray, Robert J G Mortimer, William M Mayes, Michael Rogerson, Ian T Burke
Basic oxygen furnace (BOF) steelmaking slag is enriched in potentially toxic V which may become mobilized in high pH leachate during weathering. BOF slag was weathered under aerated and air-excluded conditions for 6 months prior to SEM/EDS and μXANES analysis to determine V host phases and speciation in both primary and secondary phases. Leached blocks show development of an altered region in which free lime and dicalcium silicate phases were absent and Ca-Si-H was precipitated (CaCO3 was also present under aerated conditions)...
July 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28551583/evaluation-of-toxic-and-genotoxic-potential-of-a-wet-gas-scrubber-effluent-obtained-from-wooden-based-biomass-furnaces-a-case-study-in-the-red-ceramic-industry-in-southern-brazil
#6
Tiago Bortolotto, Jaqueline da Silva, Alex Célio Sant'Ana, Kamila Osowski Tomazi, Reginaldo Geremias, Elídio Angioletto, Claus Tröger Pich
Red ceramic industry in southern Brazil commonly uses wood biomass as furnace fuel generating great amounts of gas emissions and ash. To avoid their impact on atmospheric environment, wet scrubbing is currently being applied in several plants. However, the water leachate formed could be potentially toxic and not managed as a common water-based effluent, since the resulting wastewater could carry many toxic compounds derived from wood pyrolysis. There is a lack of studies regarding this kind of effluent obtained specifically and strictly from wooden-based biomass furnaces...
May 25, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28547667/metalloproteomics-approach-to-analyze-mercury-in-breast-milk-and-hair-samples-of-lactating-women-in-communities-of-the-amazon-basin-brazil
#7
M R Cerbino, José Cavalcante Souza Vieira, C P Braga, G Oliveira, I F Padilha, T M Silva, L F Zara, N J Silva, P M Padilha
Mercury is a potentially toxic element that is present in the environment of the Brazilian Amazon and is responsible for adverse health effects in humans. This study sought to assess possible protein biomarkers of mercury exposure in breast milk samples from lactating women in the Madeira and Negro Rivers in the Brazilian Amazon. The mercury content of hair samples of lactating women was determined, and the proteome of breast milk samples was obtained using two-dimensional electrophoresis after protein precipitation with acetone...
May 25, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28546898/treatment-of-fly-ash-from-power-plants-using-thermal-plasma
#8
Sulaiman Al-Mayman, Ibrahim AlShunaifi, Abdullah Albeladi, Imed Ghiloufi, Saud Binjuwair
Fly ash from power plants is very toxic because it contains heavy metals. In this study fly ash was treated with a thermal plasma. Before their treatment, the fly ash was analyzed by many technics such as X-ray fluorescence, CHN elemental analysis, inductively coupled plasma atomic emission spectroscopy and scanning electron microscopy. With these technics, the composition, the chemical and physical proprieties of fly ash are determined. The results obtained by these analysis show that fly ash is mainly composed of carbon, and it contains also sulfur and metals such as V, Ca, Mg, Na, Fe, Ni, and Rh...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28542445/dietary-cadmium-exposure-assessment-among-the-chinese-population
#9
Yan Song, Yibana Wang, Weifeng Mao, Haixia Sui, Ling Yong, Dajin Yang, Dingguo Jiang, Lei Zhang, Yunyun Gong
Cadmium, a toxic heavy metal, is widely present in food. It has been reported that chronic cadmium exposure is associated with kidney disease, osteoporosis, cardiovascular disease and cancer. The aim of this study was to assess the dietary cadmium exposure and potential health risk in different age-sex groups of the Chinese population (children aged 4-11 years, young people aged 12-17 years and adults aged over 18 years), and in the southern and northern population using a semi-probabilistic method. Cadmium was detected in 228,687 food samples from 32 food categrories by graphite furnace atomic absorption spectrometry...
2017: PloS One
https://www.readbyqxmd.com/read/28501334/exchangeable-sodium-percentage-decrease-in-saline-sodic-soil-after-basic-oxygen-furnace-slag-application-in-a-lysimeter-trial
#10
Chiara Pistocchi, Giorgio Ragaglini, Valentina Colla, Teresa Annunziata Branca, Cristiano Tozzini, Lea Romaniello
The Basic Oxygen Furnace Slag results from the conversion of hot metal into steel. Some properties of this slag, such as the high pH or calcium and magnesium content, makes it suitable for agricultural use as a soil amendment. Slag application to agricultural soils is allowed in some European countries, but to date there is no common regulation in the European Union. In Italy soils in coastal areas are often affected by excess sodium, which has several detrimental effects on the soil structure and crop production...
May 10, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28494400/maternal-serum-lead-level-during-pregnancy-is-positively-correlated-with-risk-of-preterm-birth-in-a-chinese-population
#11
Jun Li, Hua Wang, Jia-Hu Hao, Yuan-Hua Chen, Lu Liu, Zhen Yu, Lin Fu, Fang-Biao Tao, De-Xiang Xu
Lead (Pb) is a well-known developmental toxicant. The aim of the present study was to analyze the association between maternal serum Pb level and risk of preterm birth in a population-based birth cohort study. The present study analyzed a sub-study of the China-Anhui Birth Cohort that recruited 3125 eligible mother-and-singleton-offspring pairs. Maternal serum Pb level was measured by graphite furnace atomic absorption spectrometry. All subjects were classified into three groups by tertile division according to serum Pb level: Low-Pb (L-Pb, <1...
August 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28494363/reductive-solidification-stabilization-of-chromate-in-municipal-solid-waste-incineration-fly-ash-by-ascorbic-acid-and-blast-furnace-slag
#12
Xian Zhou, Min Zhou, Xian Wu, Yi Han, Junjun Geng, Teng Wang, Sha Wan, Haobo Hou
Fly ash is a hazardous byproduct of municipal solid waste incineration (MSWI). Cementitious material that is based on ground-granulated blast furnace slag (GGBFS) has been tested and proposed as a binder to stabilize Pb, Cd, and Zn in MSWI fly ash (FA). Cr, however, still easily leaches from MSWI FA. Different reagents, such as ascorbic acid (VC), NaAlO2, and trisodium salt nonahydrate, were investigated as potential Cr stabilizers. The results of the toxicity characteristic leaching procedure (TCLP) showed that VC significantly improved the stabilization of Cr via the reduction of Cr(VI) to Cr(III)...
April 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28452346/method-and-mechanisms-of-soil-stabilization-using-electric-arc-furnace-dust
#13
Omar S Baghabra Al-Amoudi, Abdullah A Al-Homidy, Mohammed Maslehuddin, Tawfik A Saleh
This paper reports the method and mechanism for improving the strength of marl and desert sand utilizing electric arc furnace dust (EAFD), an industrial by-product, in lieu of cement or lime. EAFD was used in conjunction with a small quantity (2%) of cement. The mechanical properties and durability characteristics of marl and sand mixed with 2% cement plus 5-, 10-, 20- or 30%-EAFD, by weight of the soil, were evaluated. The soil-cement-EAFD mixtures were used to determine their unconfined compressive strength (UCS), soaked California Bearing Ratio (CBR) and durability...
April 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28450064/a-paradoxical-response-of-the-rat-organism-to-long-term-inhalation-of-silica-containing-submicron-predominantly-nanoscale-particles-of-a-collected-industrial-aerosol-at-realistic-exposure-levels
#14
Marina P Sutunkova, Svetlana N Solovyeva, Boris A Katsnelson, Vladimir B Gurvich, Larisa I Privalova, Ilzira A Minigalieva, Tatyana V Slyshkina, Irene E Valamina, Oleg H Makeyev, Vladimir Ya Shur, Ilya V Zubarev, Dmitry K Kuznetsov, Ekaterina V Shishkina
While engineered SiO2 nanoparticle toxicity is being widely investigated, mostly on cell lines or in acute animal experiments, the practical importance of as well as the theoretical interest in industrial condensation aerosols with a high SiO2 particle content seems to be neglected. That is why, to the best of our knowledge, long-term inhalation exposure to nano-SiO2 has not been undertaken in experimental nanotoxicology studies. To correct this data gap, female white rats were exposed for 3 or 6 months 5 times a week, 4h a day to an aerosol containing predominantly submicron (nanoscale included) particles of amorphous silica at an exposure concentration of 2...
June 1, 2017: Toxicology
https://www.readbyqxmd.com/read/28420209/association-between-blood-lead-levels-and-delta-aminolevulinic-acid-dehydratase-in-pregnant-women
#15
Osmel La-Llave-León, Edna M Méndez-Hernández, Francisco X Castellanos-Juárez, Eloísa Esquivel-Rodríguez, Fernando Vázquez-Alaniz, Ada Sandoval-Carrillo, Gonzalo García-Vargas, Jaime Duarte-Sustaita, Jorge L Candelas-Rangel, José M Salas-Pacheco
Blood lead levels (BLLs) and delta-aminolevulinic acid dehydratase (ALAD) activity are considered biomarkers of lead exposure and lead toxicity, respectively. The present study was designed to investigate the association between BLLs and ALAD activity in pregnant women from Durango, Mexico. A total of 633 pregnant women aged 13-43 years participated in this study. Blood lead was measured by a graphite furnace atomic absorption spectrometer. ALAD activity was measured spectrophotometrically. Mean blood lead was 2...
April 18, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28372833/chemical-toxicity-and-ecotoxicity-evaluation-of-tannery-sludge-stabilized-with-ladle-furnace-slag
#16
E Pantazopoulou, A Zouboulis
In this study, the stabilization of tannery sludge, which produced during the physico-chemical treatment of tannery wastewaters, was examined by the addition of ladle furnace slag. Moreover, the simultaneous addition of organoclay and ladle furnace slag for the stabilization of tannery sludge was also examined. Chromium and dissolved organic carbon in the leachate of raw tannery sludge, using the EN 12457-2 standard leaching test, were found to exceed the limit values for disposal in non-hazardous and even in hazardous waste landfills, according to the EU Decision 2003/33/EC...
March 31, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28372236/direct-determination-of-pb-in-raw-milk-by-graphite-furnace-atomic-absorption-spectrometry-gf-aas-with-electrothermal-atomization-sampling-from-slurries
#17
Tatiane Milão de Oliveira, Jayme Augusto Peres, Maria Lurdes Felsner, Karin Cristiane Justi
Milk is an important food in the human diet due to its physico-chemical composition; therefore, it is necessary to monitor contamination by toxic metals such as Pb. Milk sample slurries were prepared using Triton X-100 and nitric acid for direct analysis of Pb using graphite furnace atomic absorption spectrometry - GF AAS. After dilution of the slurries, 10.00µl were directly introduced into the pyrolytic graphite tube without use of a chemical modifier, which acts as an advantage considering this type of matrix...
August 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28358500/molecular-mechanism-of-dioxin-formation-from-chlorophenol-based-on-electron-paramagnetic-resonance-spectroscopy
#18
Lili Yang, Guorui Liu, Minghui Zheng, Yuyang Zhao, Rong Jin, Xiaolin Wu, Yang Xu
Few studies have investigated the free radical intermediates involved in the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from chlorophenol. This study clarified the reaction pathways during thermochemical formation of PCDDs from 2,3,6-trichlorophenol (TCP) over a Cu(II)O/silica matrix, which was used to simulate fly ash, at 298-523 K. The reaction was studied using electron paramagnetic resonance (EPR) spectroscopy and theoretical calculations. In situ EPR indicated the TCP radical (TCPR) formed by hydrogen abstraction of TCP...
May 2, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28326316/protein-and-metalloprotein-distribution-in-different-varieties-of-beans-phaseolus-vulgaris-l-effects-of-cooking
#19
Aline P Oliveira, Geyssa Ferreira Andrade, Bianca S O Mateó, Juliana Naozuka
Beans (Phaseolus vulgaris L.) are among the main sources of protein and minerals. The cooking of the grains is imperative, due to reduction of the effect of some toxic and antinutritional substances, as well as increase of protein digestibility. In this study, the effects of cooking on albumins, globulins, prolamins, and glutelins concentration and determination of Fe associated with proteins for different beans varieties and on phaseolin concentration in common and black beans were evaluated. Different extractant solutions (water, NaCl, ethanol, and NaOH) were used for extracting albumins, globulins, prolamins, and glutelins, respectively...
2017: International journal of food science
https://www.readbyqxmd.com/read/28321634/a-preliminary-study-about-the-potential-effects-of-heavy-metals-on-the-human-male-reproductive-parameters-in-hiv-infected-population-in-china
#20
Renyan Li, Letian Zhao, Lianbing Li, Zhiwei Hou, Danyan Zhang, Ling Wan, Li Wei, Yuyou Yang, Jing Lv, Mingfu Ma, Yijian Zhu
Due to the inconsistent effects of human immunodeficiency virus (HIV) on the human male reproduction in previous studies and the impacts of environmental exposures, such as heavy metals, on male reproduction receiving little attention in HIV-infected population, the aim of present study was to investigate whether heavy metals have potential effects on reproductive parameters in HIV-infected men. The current study assessed the associations between semen quality or serum hormone and concentration of the three heavy metal toxicants (lead (Pb), cadmium (Cd), and zinc (Zn)) in seminal, urine, and serum, and 50 HIV-infected men were recruited in the present study...
March 20, 2017: Biological Trace Element Research
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