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Journal of Hazardous Materials

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https://www.readbyqxmd.com/read/27930999/innovative-reductive-remediation-of-carbon-tetrafluoride-at-room-temperature-by-using-electrogenerated-co-1
#1
G Muthuraman, I S Moon
Among the non-CO2 greenhouse gases, carbon tetrafluoride (CF4) is the most recalcitrant and should be eliminated from the atmosphere. In the present study, a non-combustion electroscrubbing method was used in an attempt to degrade CF4 with an electrogenerated Co(1+) mediator in a highly alkaline medium. The initial absorption experiments revealed 165mgL(-1) CF4 gas dissolved in 10M NaOH. Different mediator precursors, [Co(II)(CN)5](3-), [Ni(II)(CN)4](2-), [Cu(II)(OH)4](2-), and [Co(II)(OH)4](2-), were used and the electroscrubbing results showed that the electrogenerated Co(1+) or [Co(II)(OH)4](2-) precursor effectively degraded up to 99...
December 5, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27931000/thorium-impact-on-tobacco-root-transcriptome
#2
Kateřina Mazari, Přemysl Landa, Sylva Přerostová, Karel Müller, Radomíra Vaňková, Petr Soudek, Tomáš Vaněk
Thorium is natural actinide metal with potential use in nuclear energetics. Contamination by thorium, originated from mining activities or spills, represents environmental risk due to its radioactivity and chemical toxicity. A promising approach for cleaning of contaminated areas is phytoremediation, which need to be based, however, on detail understanding of the thorium effects on plants. In this study we investigated transcriptomic response of tobacco roots exposed to 200μM thorium for one week. Thorium application resulted in up-regulation of 152 and down-regulation of 100 genes (p-value <0...
November 30, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27931001/microbial-fuel-cell-operation-using-monoazo-and-diazo-dyes-as-terminal-electron-acceptor-for-simultaneous-decolourisation-and-bioelectricity-generation
#3
Yoong-Sin Oon, Soon-An Ong, Li-Ngee Ho, Yee-Shian Wong, Yoong-Ling Oon, Harvinder Kaur Lehl, Wei-Eng Thung, Noradiba Nordin
Monoazo and diazo dyes [New coccine (NC), Acid orange 7 (AO7), Reactive red 120 (RR120) and Reactive green 19 (RG19)] were employed as electron acceptors in the abiotic cathode of microbial fuel cell. The electrons and protons generated from microbial organic oxidation at the anode which were utilized for electrochemical azo dye reduction at the cathodic chamber was successfully demonstrated. When NC was employed as the electron acceptor, the chemical oxygen demand (COD) removal and dye decolourisation efficiencies obtained at the anodic and cathodic chamber were 73±3% and 95...
November 28, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27930997/copper-exposure-to-soil-under-single-and-repeated-application-selection-for-the-microbial-community-tolerance-and-effects-on-the-dissipation-of-antibiotics
#4
Bei Liu, Yanxia Li, Shiying Gao, Xingcai Chen
In order to be more practical on evaluating the response of soil microbial communities to Cu contamination, we compared the microbial activity and selection for the microbial tolerance after a high level Cu exposure in single and corresponding repeated addition. It was shown that the activities of microorganisms in soils were largely inhibited by the exposure of Cu in a level of 32.9mmol/kg. Specifically, single application displayed larger toxicity and longer-term effects on the microbial activity than the same amount of Cu that were repeatedly added by several times...
November 28, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27914288/the-use-of-red-mud-as-an-immobiliser-for-metal-metalloid-contaminated-soil-a-review
#5
REVIEW
Yumei Hua, Kate V Heal, Wolfgang Friesl-Hanl
This review focuses on the applicability of red mud as an amendment for metal/metalloid-contaminated soil. The varying properties of red muds from different sources are presented as they influence the potentially toxic element (PTE) concentration in amended soil. Experiments conducted worldwide from the laboratory to the field scale are screened and the influencing parameters and processes in soils are highlighted. Overall red mud amendment is likely to contribute to lowering the PTE availability in contaminated soil...
November 28, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27914289/metals-transfer-from-tobacco-to-cigarette-smoke-evidences-in-smokers-lung-tissue
#6
Edgar Pinto, Mariana Cruz, Patrícia Ramos, Agostinho Santos, Agostinho Almeida
Tobacco use kills millions of people every year around the world. The current level of 11 metals in tobacco was determined and their transfer rate to cigarette smoke was calculated as the difference between the total metal content in cigarettes and the amount present in its ashes. The metals content was also determined in the lung tissue of smokers and non-smokers in order to evaluate the marks that smoking leaves in this tissue. Metals content in tobacco ranged from less than 1μg/g (Co, Cd, Pb, As and Tl) to several hundreds of μg/g (Al, Mn and Ba)...
November 27, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27914290/the-interaction-of-surfactants-with-plastic-and-copper-plumbing-materials-during-decontamination
#7
Karen S Casteloes, Gamini P Mendis, Holly K Avins, John A Howarter, Andrew J Whelton
The study goal was to examine the effectiveness of surfactants to decontaminate plastic and copper potable water plumbing components. Several common potable water pipe and gasket plastics were examined as well as Alconox(®) detergent, Dawn(®) soap, and MAGIT-DG 100 surfactants. Results showed that the MAGIT-DG 100 solutions permeated all plastics within 3days, effectively compromising tensile strength (-82%), physical dimension (+43% volume, +45% weight), and oxidative resistance (-15%). A variety of MAGIT-DG 100 solution compounds permeated plastic samples, not just the declared major ingredient...
November 25, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27914287/an-assessment-of-the-environmental-fate-of-mercury-species-in-highly-polluted-brownfields-by-means-of-thermal-desorption
#8
M Rumayor, J R Gallego, E Rodríguez-Valdés, M Díaz-Somoano
High contents of mercury (Hg) have been found in old mining-metallurgy sites occurring a widespread contamination and degradation of the land. The ability to identify the Hg species present in these areas is essential to clarify fate of Hg and its bioavailability and additionally, to be able to parameterize remediation techniques based on thermal desorption in order to carry out a full-scale decontamination of the land. This study has proven the usefulness of a thermal programmed desorption procedure (Hg-TPD) for identifying Hg species in contaminated samples related to mining-metallurgy activities...
November 25, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27915099/foliar-heavy-metal-uptake-toxicity-and-detoxification-in-plants-a-comparison-of-foliar-and-root-metal-uptake
#9
REVIEW
Muhammad Shahid, Camille Dumat, Sana Khalid, Eva Schreck, Tiantian Xiong, Nabeel Khan Niazi
Anthropologic activities have transformed global biogeochemical cycling of heavy metals by emitting considerable quantities of these metals into the atmosphere from diverse sources. In spite of substantial and progressive developments in industrial processes and techniques to reduce environmental emissions, atmospheric contamination by toxic heavy metals and associated ecological and health risks are still newsworthy. Atmospheric heavy metals may be absorbed via foliar organs of plants after wet or dry deposition of atmospheric fallouts on plant canopy...
November 24, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27899240/fire-safety-improvement-of-para-aramid-fiber-in-thermoplastic-polyurethane-elastomer
#10
Xilei Chen, Wenduo Wang, Shaoxiang Li, Chuanmei Jiao
This article mainly studied fire safety effects of para-aramid fiber (AF) in thermoplastic polyurethane (TPU). The TPU/AF composites were prepared by molten blending method, and then the fire safety effects of all TPU composites were tested using cone calorimeter test (CCT), microscale combustion colorimeter test (MCC), smoke density test (SDT), and thermogravimetric/fourier transform infrared spectroscopy (TG-IR). The CCT test showed that AF could improve the fire safety of TPU. Remarkably, the peak value of heat release rate (pHRR) and the peak value of smoke production rate (pSPR) for the sample with 1...
November 24, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27903415/response-to-letter-to-editor-minor-correction-to-the-thermodynamic-calculation-using-the-distribution-constant-by-shan-et-al-and-rahmani-sani-et-al
#11
LETTER
Abolfazl Rahmani-Sani, Ran-Ran Shan, Liang-Guo Yan, Ahmad Hosseini-Bandegharaei
No abstract text is available yet for this article.
November 22, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27894755/dna-damage-induced-by-coal-dust-fly-and-bottom-ash-from-coal-combustion-evaluated-using-the-micronucleus-test-and-comet-assay-in-vitro
#12
Cristina Araujo Matzenbacher, Ana Letícia Hilario Garcia, Marcela Silva Dos Santos, Caroline Cardoso Nicolau, Suziane Premoli, Dione Silva Corrêa, Claudia Telles de Souza, Liana Niekraszewicz, Johnny Ferraz Dias, Tânia Valéria Delgado, Wolfgang Kalkreuth, Ivana Grivicich, Juliana da Silva
Coal mining and combustion generating huge amounts of bottom and fly ash are major causes of environmental pollution and health hazards due to the release of polycyclic aromatic hydrocarbons (PAH) and heavy metals. The Candiota coalfield in Rio Grande do Sul, is one of the largest open-cast coal mines in Brazil. The aim of this study was to evaluate genotoxic and mutagenic effects of coal, bottom ash and fly ash samples from Candiota with the comet assay (alkaline and modified version) and micronucleus test using the lung fibroblast cell line (V79)...
November 22, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27930998/fate-and-ecotoxicological-impact-of-new-generation-herbicides-from-the-triketone-family-an-overview-to-assess-the-environmental-risks
#13
REVIEW
E Dumas, M Giraudo, E Goujon, M Halma, E Knhili, M Stauffert, I Batisson, P Besse-Hoggan, J Bohatier, P Bouchard, H Celle-Jeanton, M Costa Gomes, F Delbac, C Forano, P Goupil, N Guix, P Husson, G Ledoigt, C Mallet, C Mousty, V Prévot, C Richard, S Sarraute
Triketones, derived chemically from a natural phytotoxin (leptospermone), are a good example of allelochemicals as lead molecules for the development of new herbicides. Targeting a new and key enzyme involved in carotenoid biosynthesis, these latest-generation herbicides (sulcotrione, mesotrione and tembotrione) were designed to be eco-friendly and commercialized fifteen-twenty years ago. The mechanisms controlling their fate in different ecological niches as well as their toxicity and impact on different organisms or ecosystems are still under investigation...
November 21, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27915102/transformation-of-hexabromocyclododecane-in-contaminated-soil-in-association-with-microbial-diversity
#14
Thao Thanh Le, Min-Hui Son, In-Huyn Nam, Hakwon Yoon, Yu-Gyeong Kang, Yoon-Seok Chang
This study evaluated the transformation of 1,2,5,6,9,10-hexabromocyclododecane (HBCD) in soil under various conditions. Under anaerobic conditions for 21days, 34% of the total HBCD was reduced from rhizosphere soil containing humic acid, and 35% of the total HBCD was reduced from the non-rhizosphere soil; under aerobic conditions, 29% and 57-60% of the total HBCD were reduced from the same soil types after 40days. Three HBCD isomers (α-, β-, and γ-HBCD) were separately analyzed for their isomeric effects on transformation...
November 21, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27899241/effects-of-nitrogen-metabolism-on-growth-and-aflatoxin-biosynthesis-in-aspergillus-flavus
#15
Bin Wang, Xiaoyun Han, Youhuang Bai, Zhenguo Lin, Mengguang Qiu, Xinyi Nie, Sen Wang, Feng Zhang, Zhenhong Zhuang, Jun Yuan, Shihua Wang
Aflatoxins (AFs), produced mainly by Aspergillus flavus and Aspergillus parasiticus, are strongly toxic and carcinogenic. Here, we showed that glutamine is the optimal nitrogen source for AF-production in A. flavus grown in Czapek Dox medium. Additionally, 4mM glutamine was the threshold for high production of aflatoxin B1. However, no significant impact of glutamine synthetase inhibitor was detected for on AF biosynthesis. In contrast, rapamycin could significantly suppress the glutamine inducing effect on AFs production, simultaneously inhibiting the fungal growth and conidiation...
November 21, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27899239/avoid-the-pcb-mistakes-a-more-sustainable-future-for-ionic-liquids
#16
REVIEW
Gregory Chatel, Emmanuel Naffrechoux, Micheline Draye
Based on our original knowledge and experience on both polychlorinated biphenyls (PCBs) identification in aquatic ecosystems, and use of ionic liquids (ILs) as solvents and/or co-catalysts in green chemistry, we drawn a dared comparison between these two families. Indeed, PCBs has been used during several decades for their new properties, but are now considered as prevalent and persistent pollutants; some toxic effects on environment or human are still revealed. ILs, often designated as "green solvents" are increasingly used in numerous applications, but few studies reported about their environmental impact are still controversial...
November 21, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27894754/composite-of-cu-metal-nanoparticles-multiwall-carbon-nanotubes-reduced-graphene-oxide-as-a-novel-and-high-performance-platform-of-the-electrochemical-sensor-for-simultaneous-determination-of-nitrite-and-nitrate
#17
Hasan Bagheri, Ali Hajian, Mosayeb Rezaei, Ali Shirzadmehr
In the present research, we aimed to fabricate a novel electrochemical sensor based on Cu metal nanoparticles on the multiwall carbon nanotubes-reduced graphene oxide nanosheets (Cu/MWCNT/RGO) for individual and simultaneous determination of nitrite and nitrate ions. The morphology of the prepared nanocomposite on the surface of glassy carbon electrode (GCE) was characterized using various methods including scanning electron microscopy (SEM), atomic force microscopy (AFM), and electrochemical impedance spectroscopy...
November 21, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27890359/selective-removal-of-cesium-by-ammonium-molybdophosphate-polyacrylonitrile-bead-and-membrane
#18
Dahu Ding, Zhenya Zhang, Rongzhi Chen, Tianming Cai
The selective removal of radionuclides with extremely low concentrations from environmental medium remains a big challenge. Ammonium molybdophosphate possess considerable selectivity towards cesium ion (Cs(+)) due to the specific ion exchange between Cs(+) and NH4(+). Ammonium molybdophosphate - polyacrylonitrile (AMP-PAN) membrane was successfully prepared for the first time in this study. Efficient removal of Cs(+) (95.7%, 94.1% and 91.3% of 1mgL(-1)) from solutions with high ionic strength (400mgL(-1) of Na(+), Ca(2+) or K(+)) was achieved by AMP-PAN composite...
November 21, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27932036/flame-retardant-wrapped-polyphosphazene-nanotubes-a-novel-strategy-for-enhancing-the-flame-retardancy-and-smoke-toxicity-suppression-of-epoxy-resins
#19
Shuilai Qiu, Xin Wang, Bin Yu, Xiaming Feng, Xiaowei Mu, Richard K K Yuen, Yuan Hu
The structure of polyphosphazene nanotubes (PZS) is similar to that of carbon nanotubes (CNTs) before modification. For applications of CNTs in polymer composites, surface wrapping is an economically attractive route to achieve functionalized nanotubes. Based on this idea, functionalized polyphosphazene nanotubes (FR@PZS) wrapped with a cross-linked DOPO-based flame retardant (FR) were synthesized via one-step strategy and well characterized. Then, the obtained FR@PZS was introduced into epoxy resin (EP) to investigate flame retardancy and smoke toxicity suppression performance...
November 20, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27915101/surface-active-bismuth-ferrite-as-superior-peroxymonosulfate-activator-for-aqueous-sulfamethoxazole-removal-performance-mechanism-and-quantification-of-sulfate-radical
#20
Wen-Da Oh, Zhili Dong, Goei Ronn, Teik-Thye Lim
A surface-active Bi2Fe4O9 nanoplates (BF-nP) was prepared using a facile hydrothermal protocol for sulfamethoxazole (SMX) removal via peroxymonosulfate (PMS). The catalytic activity of BF-nP was superior to other catalysts with the following order of performance: BF-nP>Bi2Fe4O9 (nanocubes)>Co3O4>Fe2O3 (low temperature co-precipitation method)>Fe2O3 (hydrothermal method)∼Bi2O3∼Bi(3+)∼Fe(3+). The empirical relationship of the apparent rate constant (kapp), BF-nP loading and PMS dosage can be described as follows: kapp=0...
November 20, 2016: Journal of Hazardous Materials
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