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Journal of Hazardous Materials

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https://www.readbyqxmd.com/read/28633083/adsorption-of-cu-ii-pb-ii-and-cr-vi-from-aqueous-solutions-using-black-wattle-tannin-immobilized-nanocellulose
#1
Qinghua Xu, Yulu Wang, Liqiang Jin, Yu Wang, Menghua Qin
A novel nanocomposite based on black wattle (BW) tannin and nanocellulose was prepared and applied in heavy metal ions adsorptive removal from aqueous solutions. Firstly, nanocrystalline cellulose was oxidized by sodium periodate to get dialdehyde nanocellulose (DANC). BW tannin was then covalently immobilized onto DANC, which was used as both the matrix and crosslinker, to obtain tannin-nanocellulose (TNCC) composite. The resulting nanocomposite was characterized using FTIR, AFM, and TG. The successful immobilization was confirmed by the chromogenic reaction between FeCl3 and TNCC and FT-IR analysis...
June 17, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28646683/fabrication-of-low-fire-hazard-flexible-poly-vinyl-chloride-via-reutilization-of-heavy-metal-biosorbents
#2
Ye-Tang Pan, De-Yi Wang
As a naturally abundant biopolymer, chitosan is considered to be a suitable adsorbent for stannate (SnO3(2-)) in tin plating wastewater. However, mass transfer of the adsorbent and its recycling remain challenging problems. Though flexible poly(vinyl chloride) (PVC) is highly flammable due to the addition of plasticizers, the traditional flame retardant, antimony trioxide (Sb2O3), is potentially harmful. In this study, chitosan was anchored onto the surface of PVC resin to adsorb SnO3(2-) from wastewater. Thereafter, tin-doped chitosan-coated PVC resin was readily recycled and processed into a flexible PVC composite (modified fPVC)...
June 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28641233/large-eddy-simulation-and-experimental-study-on-vented-gasoline-air-mixture-explosions-in-a-semi-confined-obstructed-pipe
#3
Guoqing Li, Yang Du, Shimao Wang, Sheng Qi, Peili Zhang, Wenzhuo Chen
In this work, LES simulation coupled with a TFC sub-grid combustion model has been performed in a semi-confined pipe (L/D=10, V=10L) in the presence of four hollow-square obstacles (BR=49.8%) with circular hollow cross-section, in order to study the premixed gasoline-air mixture explosions. The comparisons between simulated results and experimental results have been conducted. It was found that the simulated results were in good agreement with experimental data in terms of flame structures, flame locations and overpressure time histories...
June 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28641232/on-the-aquatic-toxicity-of-substituted-phenols-to-chlorella-vulgaris-qstr-with-an-extended-novel-data-set-and-interspecies-models
#4
Gulcin Tugcu, M Doğa Ertürk, Melek Türker Saçan
This study provides for the first time the 96-h toxicity of 16 nitro- and methyl- substituted phenols to Chlorella vulgaris. Enabling the circulation of new ecotoxicity data has expanded the previously reported toxicity data set of 30 phenols to C. vulgaris by our laboratory. In this respect, high quality, single source algal toxicity data, generated in the same laboratory according to a REACH (Registration, Evaluation, Authorization and Restriction of CHemicals) compatible endpoint, provided a sound basis to explore quantitative structure-toxicity relationship (QSTR), which can be used for regulatory purposes...
June 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28633081/deflagration-to-detonation-transition-in-jp-10-mist-air-mixtures-in-a-large-scale-tube
#5
Shuzhuan Li, Qingming Liu, Xu Chen, Jinxiang Huang, Jing Li
Deflagration to detonation transitions (DDTs) in JP-10 mist/air mixtures have been studied in a horizontal multiphase combustion and explosion tube with inner diameter of 199mm and length of 32.8m. The mist/air mixtures were generated by injecting liquid samples into the experimental tube. Experiments were performed at 298k and 101kPa with equivalence ratio ranged from 0.51 to 2.09. The coupling process of deflagration wave with leading shock wave and low-velocity self-sustained detonation were observed in JP-10 mist/air mixture with a concentration of 142...
June 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28633082/role-of-indigenous-microbiota-from-heavily-contaminated-sediments-in-the-bioprecipitation-of-arsenic
#6
Erika E Rios-Valenciana, Roberto Briones-Gallardo, Luis F Cházaro-Ruiz, Nadia Martínez-Villegas, Lourdes B Celis
High arsenic concentrations have been detected in alluvial aquifers of arid and semi-arid zones in Mexico. This work describes the potential of microbial arsenate reduction of the indigenous community present in sediments from an arsenic contaminated aquifer. Microcosms assays were conducted to evaluate arsenate and sulfate-reducing activities of the native microbiota. Two different sediments were used as inoculum in the assays amended with lactate (10mM) as electron donor and with sulfate and arsenate (10mM each) as electron acceptors...
June 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28609727/enhancing-the-soil-heavy-metals-removal-efficiency-by-adding-hpma-and-pbtca-along-with-plant-washing-agents
#7
Yaru Cao, Shirong Zhang, Guiyin Wang, Ting Li, Xiaoxun Xu, Ouping Deng, Yanzong Zhang, Yulin Pu
Plant washing agents-water-extracted from Coriaria nepalensis (CN), Clematis brevicaudata (CB), Pistacia weinmannifolia (PW) and Ricinus communis (RC)-are feasible and eco-friendly for soil heavy metal removal, but their single application has limited removal efficiency. To improve their metal removal efficiencies, two biodegradable assistant agents, hydrolytic polymaleic anhydride (HPMA) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), were investigated in combination with plant washing agents through batch soil washing experiments...
June 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28628786/btex-and-naphthalene-degrading-bacterium-microbacterium-esteraromaticum-strain-sbs1-7-isolated-from-estuarine-sediment
#8
Akanit Wongbunmak, Sansanee Khiawjan, Manop Suphantharika, Thunyarat Pongtharangkul
In this study, a non-pathogenic, BTEX-degrading Microbacterium esteraromaticum SBS1-7 was isolated from estuarine sediment in Thailand via an enrichment technique. M. esteraromaticum SBS1-7 was able to degrade all six BTEX components, in both liquid medium and soil slurry system, when BTEX was supplied as an individual component or a mixture. It exhibited a high level of tolerance towards a wide range of hydrocarbons and also utilized alkanes and naphthalene. Detection of metabolites produced during BTEX and naphthalene degradation revealed highly extensive biodegradation pathways used by M...
June 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28622583/pvp-capped-silver-nanocubes-assisted-removal-of-glyphosate-from-water-a-photoluminescence-study
#9
Sumit Sarkar, Ratan Das
Glyphosate [N-phosphono-methylglycine (PMG)] is the most used herbicide worldwide and it has been reported very recently that Glyphosate is very harmful and can produce lots of diseases such as alzheimer and parkinson's disease, depression, cancer, infertility including genotoxic effects. As it is mostly present in stable water body and ground water system, its detection and removal is very important. Here, we have shown a fluorescence technique for the removal of glyphosate from water using chemically synthesized polyvinylpyrrolidone (PVP) silver nanocrystals...
June 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28623725/a-new-route-to-the-stable-capture-and-final-immobilization-of-radioactive-cesium
#10
Jae Hwan Yang, Ahreum Han, Joo Young Yoon, Hwan-Seo Park, Yung-Zun Cho
Radioactive Cs released from damaged fuel materials in the event of nuclear accidents must be controlled to prevent the spreading of hazardous Cs into the environment. This study describes a simple and novel process to safely manage Cs gas by capturing it within ceramic filters and converting it into monolithic waste forms. The results of Cs trapping tests showed that CsAlSiO4 was a reaction product of gas-solid reactions between Cs gas and our ceramic filters. Monolithic waste forms were readily prepared from the Cs-trapping filters by the addition of a glass frit followed by thermal treatment at 1000°C for 3h...
June 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28622582/porous-mn-doped-g-c3n4-photocatalysts-for-enhanced-synergetic-degradation-under-visible-light-illumination
#11
Ji-Chao Wang, Cheng-Xing Cui, Ying Li, Lu Liu, Yu-Ping Zhang, Weina Shi
Photocatalytic degradation by semiconductors is an ideal way to solve the environmental problem. Here, the porous Mn doped g-C3N4 photocatalyst was synthesized by the calcination-refluxing method. The as-prepared g-C3N4 exhibits the high activity of photocatalytic degradation under visible light irradiation ( > 400nm) in the mixed system of Cr(VI) and organic pollutants. Especially, the photocatalytic activity of Cr(VI) reduction was increased from 9.5% to 76.5%, while that of Rhodamine B(RhB) degradation was enhanced from 15...
June 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28623724/sub-lethal-pharmaceutical-hazard-tracking-in-adult-zebrafish-using-untargeted-lc-ms-environmental-metabolomics
#12
Ryan B De Sotto, Carl D Medriano, Yunchul Cho, Hyuk Kim, In-Young Chung, Kwang-Seol Seok, Kyung Guen Song, Seok Won Hong, Youngja Park, Sungpyo Kim
Antibiotics in the aquatic environment are dispersed through anthropogenic activities at low concentrations. Despite their sub lethal concentration, these biologically active compounds may still have adverse effects to non-target species. This study examined the response of adult zebrafish to 0.1mg/L concentration of clarithromycin, florfenicol, sulfamethazine, and their mixture using environmental metabolomics. Embryo and larvae of the fish were also used to assess fish embryo acute toxicity and behavior tests respectively...
June 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28609726/removal-of-tetracycline-from-aqueous-solution-by-mcm-41-zeolite-a-loaded-nano-zero-valent-iron-synthesis-characteristic-adsorption-performance-and-mechanism
#13
Yige Guo, Wenli Huang, Bin Chen, Ying Zhao, Dongfang Liu, Yu Sun, Bin Gong
In this study, nano zero valent iron (NZVI) modified MCM-41-zeolite A (Fe-MCM-41-A) composite as a novel adsorbent was prepared by precipitation method and applied for tetracycline (TC) removal from aqueous solution. The adsorbent was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and N2-BET analysis. Hysteresis loops indicated that the sample has a desirable magnetic property and can be separated quickly...
June 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28601597/in-vitro-studies-on-cytotoxicity-of-delaminated-ti3c2-mxene
#14
A M Jastrzębska, A Szuplewska, T Wojciechowski, M Chudy, W Ziemkowska, L Chlubny, A Rozmysłowska, A Olszyna
MXenes are a novel family of 2D materials, the biological activity of which has been largely unexplored. The present study, for the first time, shows some aspects of the in vitro toxicity of 2D sheets of Ti3C2 MXene. The Ti3AlC2 MAX phase was used in an expansion and delamination process to obtain Ti3C2 material in the form of 2D sheets. The obtained 2D material was characterized using SEM, TEM, DLS, XPS, and zeta potential. The biological activity of the MXene was determined on two normal (MRC-5 and HaCaT) and two cancerous (A549 and A375) cell lines...
June 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28609733/a-novel-approach-for-acid-mine-drainage-pollution-biomonitoring-using-rare-earth-elements-bioaccumulated-in-the-freshwater-clam-corbicula-fluminea
#15
Estefanía Bonnail, Rafael Pérez-López, Aguasanta M Sarmiento, José Miguel Nieto, T Ángel DelValls
Lanthanide series have been used as a record of the water-rock interaction and work as a tool for identifying impacts of acid mine drainage (lixiviate residue derived from sulphide oxidation). The application of North-American Shale Composite-normalized rare earth elements patterns to these minority elements allows determining the origin of the contamination. In the current study, geochemical patterns were applied to rare earth elements bioaccumulated in the soft tissue of the freshwater clam Corbicula fluminea after exposure to different acid mine drainage contaminated environments...
June 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28618369/characterization-and-quantification-of-chromate-adsorption-by-layered-porous-iron-oxyhydroxide-an-experimental-and-theoretical-study
#16
Zongsu Wei, Shuang Luo, Ruiyang Xiao, Rafail Khalfin, Raphael Semiat
The inner structure of iron oxyhydroxide agglomerates (IOAs) prepared from hydrolysis of ferric chloride was characterized and correlated to surface complexation of hexavalent chromium, Cr(VI), in a broad range of pH (3-12) and ionic strengths (0.0-5.0M). Evolution of particle size, morphology, and surface activity, combined with density functional theory (DFT) calculations, support the condensation reaction initiated formation of IOAs in three levels: iron nanoparticles to nanolayers to agglomerates. This agglomeration process led to a layered porous structure for aqueous-phase IOAs resulting in a rapid and high removal of Cr(VI) in batch tests...
June 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28618372/experimental-research-of-heat-mass-coupling-response-of-liquid-storage-tanks
#17
Jingjie Ren, Han Zhang, Jianliang Yu, Mingshu Bi, Shaochen Sun
In order to study the coupling response process of the liquid tank under the external thermal attack, experiments were carried out on a vertical cylindrical storage tank by electric heating. The response processes of the tank pressure, the medium temperatures, and the wet and dry tank wall temperatures were monitored in the experiments. The coupling responding process between the evolving characters of the medium temperature and the tank wall temperature, as well as the resulting rising features of the tank pressure were analyzed comprehensively...
June 2, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28609728/fabrication-of-novel-g-c3n4-nanocrystals-decorated-ag3po4-hybrids-enhanced-charge-separation-and-excellent-visible-light-driven-photocatalytic-activity
#18
Meng Sun, Qi Zeng, Xia Zhao, Yu Shao, Pengge Ji, Changqian Wang, Tao Yan, Bin Du
Graphitic carbon nitride (g-C3N4) nanocrystals (NCs) decorated Ag3PO4 hybrids were synthesized by a facile method. The obtained samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), and UV-vis diffuse reflectance spectra (DRS). The SEM and TEM images showed that the as-prepared Ag3PO4 were composed of particles with diameters of 200-500nm, while the obtained nanocrystalline g-C3N4 were composed of smaller particles with average diameter of 10nm...
June 2, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28618370/preferential-adsorption-and-surface-precipitation-of-lead-ii-ions-onto-anatase-in-artificially-contaminated-dixie-clay
#19
Tasuma Suzuki, Miyu Okita, Satoshi Kakoyama, Masakazu Niinae, Hideki Nakata, Hiroshi Fujii, Yukio Tasaka
During TEM-EDS (transmission electron microscopy coupled with an X-ray energy dispersive spectrometer) analysis of Dixie clay artificially contaminated with Pb(II), we observed that Pb(II) was preferentially adsorbed and precipitated on the surface of TiO2. To deepen the understanding of the mechanism and importance of this phenomenon, batch sorption experiments, XANES (X-ray absorption near edge spectroscopy) analysis, and sequential extraction analysis were performed. The TiO2 in Dixie clay was found to be anatase, and anatase showed a higher Pb(II) sorption propensity than rutile, α-FeOOH, and one of two MnO2 investigated in this study...
June 1, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28599262/relationship-between-acute-and-chronic-toxicity-for-prevalent-organic-pollutants-in-vibrio-fischeri-based-upon-chemical-mode-of-action
#20
Xiao H Wang, Ling Y Fan, Shuo Wang, Yue Wang, Li C Yan, Shan S Zheng, Christopher J Martyniuk, Yuan H Zhao
Chemicals show diverse modes of action (MOAs) in aquatic organisms depending upon acute and chronic toxicity evaluations. Here, toxicity data for Vibrio fischeri involving 52 compounds for acute and chronic toxicity were used to determine the congruence of acute and chronic toxicity for assessing MOAs. Using toxic ratios, most of the compounds categorized into MOAs that included baseline, less inert or reactive compounds with acute toxicity were also categorized as baseline, less inert or reactive compounds with chronic toxicity...
June 1, 2017: Journal of Hazardous Materials
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