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Journal of Hazardous Materials

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https://www.readbyqxmd.com/read/30419461/efficiency-and-mechanism-of-atenolol-decomposition-in-co-feooh-catalytic-ozonation
#1
Zhenzhen Xu, Meiling Xie, Yue Ben, Jimin Shen, Fei Qi, Zhonglin Chen
Co-incorporated α-FeOOH nanocrystal (Co-FeOOH) was synthesized and applied for the ozonation of atenolol (ATL) in water. The compound was characterized and recognized as a transitional structure from FeOOH to CoFeO4 . The presence of Co-FeOOH was observed to support the formation of •OH by promoting ozone decomposition, and the degradation of ATL and TOC was significantly improved during the catalytic ozonation. Catalytic reactions were rationally designed in different water matrices, efficient and simultaneous removal of ATL and natural organic contaminants was achieved...
November 3, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30419463/experimental-and-numerical-simulation-study-of-the-thermal-hazards-of-four-azo-compounds
#2
Shang-Hao Liu, Chen-Rui Cao, Wei-Cheng Lin, Chi-Min Shu
Azo compounds (azos) possess diverse exothermic properties that enable their application in numerous industrial processes, but these properties also engender a corresponding diversity of thermal hazard profiles. This study employed an innovative approach to determine the specific thermal reactions and decomposition hazard profiles of azos. Four typical azos (AIBN, AMBN, ABVN, and AIBME) were assessed using three thermal calorimetry techniques, and results were subsequently analyzed using a nonlinear optimization model...
November 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30419462/degradation-of-diclofenac-using-palladized-anaerobic-granular-sludge-effects-of-electron-donor-reaction-medium-and-deactivation-factors
#3
Xiangchun Quan, Xinrui Wang, Yue Sun, Wanlin Li, Liang Chen, Jinbo Zhao
Biogenic nanopalladium (Bio-Pd) was formed by Anaerobic Granular Sludge (AGS). The Bio-Pd hosted in AGS (Pd-AGS) was used to degrade a pharmaceutical compound diclofenac (DCF) under the conditions of various electron donors, Pd loadings and reaction media. Results showed that hydrogen was the most effective electron donor for the Pd-AGS, followed by formate, glucose and acetate. The Pd-AGS was able to produce effective hydrogen/electron donors from organic compounds via microbial metabolism to initiate Pd activity...
November 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30414517/a-green-approach-to-fabricating-nacre-inspired-nanocoating-for-super-efficiently-fire-safe-polymers-via-one-step-self-assembly
#4
Huali Xie, Xuejun Lai, Yanlin Wang, Hongqiang Li, Xingrong Zeng
Developing a high efficient, environmental-friendly and universal fire-safe strategy for combustible polymers is crucial but challengeable. Inspired by nacre, we developed a super-efficiently fire-safe nanocoating based on carboxymethyl chitosan (CCS) and modified montmorillonite (MMT) via one-step self-assembly. The nanocoating possessed well-arranged nacre-like hierarchical microstructure, exhibiting high transparency and specific nacre-like iridescence. More importantly, the nanocoating endowed many large-scale polymer substrates, such as polyester film, cotton fabric and polyurethane foam, with super-efficient fire-safety by dip-coating or spray-coating...
November 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30412810/novel-synthesis-of-bi-bi-2-o-3-tio-2-c-composite-for-capturing-iodine-129-in-off-gas
#5
Hao Zou, Facheng Yi, Mianxin Song, Xiaoqiang Wang, Liang Bian, Weimin Li, Ning Pan, Xiaoqiang Jiang
The Bi-Bi2 O3 -TiO2 -C composites were prepared by a sol-gel method and investigated for capturing iodine-129 (129 I) in off-gas producing from spent fuel reprocessing. Firstly, the optimal process conditions were operated through the orthogonal experiments, showing that the capturing capacity of the optimal composite was calculated about 504.0 ± 19.5 mg/g, which is approximately 2.0-fold higher than that of the commercial silver-exchanged zeolites (AgX). Secondly, the structure and morphology of the Bi-Bi2 O3 -TiO2 -C composite were characterized, suggesting that the Bi is regularly spherical in the shape, coating by the Bi2 O3 , TiO2 and amorphous carbon...
November 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30408687/selective-removal-of-nicotine-from-the-main-stream-smoke-by-using-a-surface-imprinted-polymer-monolith-as-adsorbent
#6
X H Huang, J J Song, H Li, M T Gong, Y Zhang
Using molecularly imprinted polymer as a selective adsorbent for gaseous toxicants is a novel attempt. In present work, a nicotine surface-imprinted monolith (MIM) was used for the selective removal of nicotine from smoke. First, the retention capacity and selectivity for this MIM was tested by using it as the stationary phase in gas chromatography and chromatographic conditions optimized. Then, the gas phase adsorption isotherms of MIM were constructed and the adsorption thermodynamics explored. At last, the applicability for MIM in the removal of nicotine in smoke was explored...
November 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30399485/biochar-combined-with-polyvalent-phage-therapy-to-mitigate-antibiotic-resistance-pathogenic-bacteria-vertical-transfer-risk-in-an-undisturbed-soil-column-system
#7
Mingming Sun, Mao Ye, Zhongyun Zhang, Shengtian Zhang, Yuanchao Zhao, Shaopo Deng, Lingya Kong, Rongorng Ying, Bing Xia, Wentao Jiao, Jiaqi Cheng, Yanfang Feng, Manqiang Liu, Feng Hu
The vertical migration of antibiotic resistance pathogenic bacteria (ARPB) and antibiotic resistance genes (ARGs) in the surface soil-vadose soil system has become a new threat to ecological safety and public health; there is an imperative need to develop an efficient technique for targeted control and inactivation of ARPB in these systems. In this work, undisturbed soil columns (0 ∼ -5 m) were constructed to investigate the impact of biochar amendment or/and polyvalent bacteriophage (ΦYSZ-KK) therapy on the vertical control and inactivation of tetracycline-resistant Escherichia coli K-12 and chloramphenicol-resistant Klebsiella pneumonia K-6...
November 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30419460/wetland-plant-microbial-fuel-cells-for-remediation-of-hexavalent-chromium-contaminated-soils-and-electricity-production
#8
Chung-Yu Guan, Yi-Ho Tseng, Daniel C W Tsang, Anyi Hu, Chang-Ping Yu
The plant microbial fuel cell (PMFC) is a novel technology which integrates plants, microbes, and electrochemical elements together to create renewable energy. However, information regarding using the PMFC system to remediate metal-contaminated soils is still limited. In this study, we evaluate the potential of PMFC systems to remediate soils polluted by Cr(VI). We compare different plants and different electrode materials with regard to their electricity generation and Cr(VI) removals under different soil Cr(VI) concentrations...
November 1, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30412808/co-immobilization-of-laccase-and-abts-onto-novel-dual-functionalized-cellulose-beads-for-highly-improved-biodegradation-of-indole
#9
Gu Yaohua, Xue Ping, Jia Feng, Shi Keren
The method developed in this work, for the first time, for the co-immobilization of mediator 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and laccase, in which the dual-functionalized cellulose beads with network pore structure were constructed by polydopamine (PD) and polymeric glycidyl methacrylate (GMA) to obtain the biocatalyst co-immobilizing ABTS and laccase. ABTS molecules were encapsulated into the dual-functionalized cellulose beads to obtain an efficient carrier (PD-GMA-Ce/ABTS) on which the laccase could be covalently immobilized by means of the coupling between the amino groups of the enzyme and the epoxy groups and ortho-dihydroxyphenyl groups existing on the beads...
November 1, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30412807/enhanced-visible-light-activation-of-persulfate-by-ti-3-self-doped-tio-2-graphene-nanocomposite-for-the-rapid-and-efficient-degradation-of-micropollutants-in-water
#10
Lei Yang, Lu Xu, Xue Bai, Pengkang Jin
In this study, a novel TiO2-x /rGO-PS-Vis process was developed, which utilizes the TiO2-x /rGO (Ti3+ and oxygen vacancies self-doped TiO2 coupled with reduced graphene oxide) nanocomposite as a promising and efficient activator of persulfate (PS) for the enhanced oxidation of micropollutants under visible -light irradiation. TiO2-x /rGO exhibited a significantly high activity for PS activation to produce more sulfate radicals (SO4 - ) and hydroxyl radicals (OH). Therefore, almost 100% BPA (10 mg/L) and 80% TOC can be removed just within 12 min with 1...
November 1, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30408688/efficient-removal-of-zinc-from-water-and-wastewater-effluents-by-hydroxylated-and-carboxylated-carbon-nanotube-membranes-behaviors-and-mechanisms-of-dynamic-filtration
#11
Sharafat Ali, Syed Aziz Ur Rehman, Izaz Ali Shah, Muhammad Usman Farid, Alicia Kyoungjin An, Haiou Huang
In this work, a bench scale study was designed to investigate the removal of zinc (Zn2+ ) and regeneration efficiencies of functionalized-MWCNT (f-MWCNT) membranes. The f-MWCNTs were incorporated into polyvinylchloride (PVC) hollow fiber membranes (HFMs), which acted as a substrate and a barrier for MWCNTs leaching to water. The results revealed that the removal capacity of Zn2+ through f-CNT membranes were above 98% for the synthetic water and over 70% for real wastewater effluents; predominantly involved surface complexation reaction...
November 1, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30399488/flame-retardant-vinylon-poly-m-phenylene-isophthalamide-blended-fibers-with-synergistic-flame-retardancy-for-advanced-fireproof-textiles
#12
Xiansheng Zhang, Meiwu Shi
Superior flame retardant textiles are urgently needed to address high fire and heat risks. This study provides a simple and effective strategy to improve the flame retardancy of textiles through a synergistic effect between the blended fibers, and a system with synergistic in flame retardant vinylon (FRV)/poly(m-phenylene isophthalamide) (PMIA) blended fibers is discovered. The FRV/PMIA 50/50 exhibits a much higher time to ignition and a lower peak heat release rate than those of the neat components, indicating a synergistic flame retardancy between constituents...
November 1, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30399486/rapid-depressurization-and-phase-transition-of-co-2-in-vertical-ducts-small-scale-experiments-and-rankine-hugoniot-analyses
#13
Per Morten Hansen, André Vagner Gaathaug, Dag Bjerketvedt, Knut Vaagsaether
This study discusses the rapid expansion and phase transition of liquefied carbon dioxide (CO2 ) in vertical ducts. Results from small-scale experiments in three test setups (A, B, and C) were compared with a Rankine-Hugoniot model that treats the phase transition as an adiabatic evaporation wave of constant thickness. The model calculates the fluid properties behind the evaporation wave. The motivation was to identify hazards and quantify the energy-release in tank explosions such as a boiling liquid expanding vapor explosion...
November 1, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30396137/highly-efficient-degradation-of-2-4-dichlorophenol-over-ceo-2-g-c-3-n-4-composites-under-visible-light-irradiation-detailed-reaction-pathway-and-mechanism
#14
Muhammad Humayun, Zhewen Hu, Abbas Khan, Wei Cheng, Yang Yuan, Zhiping Zheng, Qiuyun Fu, Wei Luo
Herein, we report for the first time the highly efficient degradation of 2,4-dichlorophenol (2,4-DCP) over CeO2 /g-C3 N4 composites (xCeO/CN) prepared via wet-chemical solution method. It is shown that the resultant nanocomposites with a proper mass ratio percentage (15%) of CeO coupled exhibit greatly enhanced visible-light activity for 2,4-dichlorophenol (2,4-DCP) degradation compared to the bare g-C3 N4 . From photoluminescence (PL) and Fluorescence (FL) results, it is suggested that enhanced photo-degradation is attributed to the significantly improved charge separation and transfer as a result of the proper band alignments between g-C3 N4 and CeO components...
October 31, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30390580/biodegradability-and-toxicity-of-monorhamnolipid-biosurfactant-diastereomers
#15
David E Hogan, Fei Tian, Scott W Malm, Christopher Olivares, Ricardo Palos Pacheco, Michael T Simonich, Anoop S Hunjan, Robert L Tanguay, Walter T Klimecki, Robin Polt, Jeanne E Pemberton, Joan E Curry, Raina M Maier
Synthetic monorhamnolipids differ from biologically produced material because they are produced as single congeners, depending on the β-hydroxyalkanoic acid used during synthesis. Each congener is produced as one of four possible diastereomers resulting from two chiral centers at the carbinols of the lipid tails [(R,R), (R,S), (S,R) and (S,S)]. We compare the biodegradability (CO2 respirometry), acute toxicity (Microtox assay), embryo toxicity (Zebrafish assay), and cytotoxicity (xCELLigence and MTS assays) of synthetic rhamnosyl-β-hydroxydecanoyl-β-hydroxydecanoate (Rha-C10-C10) monorhamnolipids against biosynthesized monorhamnolipid mixtures (bio-mRL)...
October 31, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30419543/optimization-of-direct-blue-14-dye-degradation-by-bacillus-fermus-kx898362-an-alkaliphilic-plant-endophyte-and-assessment-of-degraded-metabolite-toxicity
#16
N Neetha J, Sandesh K, Girish Kumar K, Chidananda B, Ujwal P
Alkaliphilic bacteria possesses the ability to survive in the extreme conditions with high salt concentrations. The adaptability of alkaliphilic bacteria to extreme conditions has made them predominant degrader in the field of biodegradation. A moderately alkaliphilic endophyte was isolated from Centella asiatica with a potential to degrade a di-azo dye Direct Blue-14(DB-14). The isolate was identified as Bacillus fermus with 97% similarity strain Xmb064. On optimization, maximum of 92.76% biodegradation was attained with dye concentration at 68...
October 29, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30412809/continuous-removal-of-the-model-pharmaceutical-chloroquine-from-water-using-melanin-covered-escherichia-coli-in-a-membrane-bioreactor
#17
Magnus Lindroos, David Hörnström, Gen Larsson, Martin Gustavsson, Antonius J A van Maris
Environmental release and accumulation of pharmaceuticals and personal care products is a global concern in view of increased awareness of ecotoxicological effects. Adsorbent properties make the biopolymer melanin an interesting alternative to remove micropollutants from water. Recently, tyrosinase-surface-displaying Escherichia coli was shown to be an interesting self-replicating production system for melanin-covered cells for batch-wise absorption of the model pharmaceutical chloroquine. This work explores the suitability of these melanin-covered E...
October 29, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30408766/adsorption-of-sr-ii-from-water-by-mercerized-bacterial-cellulose-membrane-modified-with-edta
#18
Rong Cheng, Mi Kang, Shuting Zhuang, Lei Shi, Xiang Zheng, Jianlong Wang
The treatment of low-level radioactive wastewater is a critical and considerable challenge. Bacterial cellulose membrane (BCM) modified with ethylenediaminetetraacetic acid (EDTA) using (3-aminopropyl) triethoxysilane (APTES) as a crosslinker were used to remove Sr2+ in this work. SEM, XPS, and FTIR were used to characterize the morphology, structure, chemical shift, and functional groups of the as-prepared adsorbent. The synthesized BCM@APTES-EDTA presented a three-layer structure of membrane-net-membrane with nano-sized fibers (<100 nm)...
October 29, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30396139/biochar-mediated-sorption-of-antibiotics-in-pig-manure
#19
A N Ngigi, Y S Ok, S Thiele-Bruhn
Using manure contaminated with antibiotics as fertilizer is a primary source of soil pollution with antibiotics and concomitantly with antibiotic resistance genes (ARG). Bioavailable antibiotics trigger further ARG amplification during manure storage. Consequently it is aimed to facilitate the immobilization of antibiotics in manure. To this end, five biochars derived from pine cone (BCP), rice husk, sewage sludge, digestate and Miscanthus were tested as additional sorbents in liquid pig manure for sulfamethazine, ciprofloxacin, oxytetracycline and florfenicol...
October 29, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30412845/bi-2-se-3-decorated-recyclable-liquid-exfoliated-mos-2-nanosheets-towards-suppress-smoke-emission-and-improve-mechanical-properties-of-epoxy-resin
#20
Yanbei Hou, Yixin Hu, Shuilai Qiu, Longxiang Liu, Weiyi Xing, Weizhao Hu
Bimetallic compounds have been proved superior suppression effect on smoke emission during combustion of polymers. In this work, MoS2 /Bi2 Se3 (MB) hybrids were prepared by a facile wet chemical method and showed superior performance on smoke suppression of EP matrix during combustion. N-vinyl pyrrolidone (NVP) was employed to exfoliate molybdenum disulfide (MoS2 ) nanosheets in a recyclable method, which showed high efficiency and was recyclable. Exfoliated MoS2 exhibited large surface area and used as carriers to synthesize MB hybrids...
October 28, 2018: Journal of Hazardous Materials
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