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Journal of Hazardous Materials

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https://www.readbyqxmd.com/read/28222347/competitive-adsorption-of-as-iii-as-v-sb-iii-and-sb-v-onto-ferrihydrite-in-multi-component-systems-implications-for-mobility-and-distribution
#1
Pengfei Qi, Thomas Pichler
The simultaneous adsorption behavior and competitive interactions between As(III), As(V), Sb(III) and Sb(V) by ferrihydrite were evaluated in multi-component (binary, ternary, quaternary) systems. In binary systems, Sb(III) had a stronger inhibitory influence on As(III) adsorption than Sb(V) did, and As(V) had a stronger inhibitory effect on Sb(V) adsorption than As(III) did. In ternary systems, NO3(-), PO4(3-) and SO4(2-) did not compete with the adsorption of As(III) and Sb(III). NO3(-) and SO4(2-) also had no distinct effect on the adsorption of As(V) and Sb(V), while PO4(3-) competed with As(V) and Sb(V) for surface sites...
February 14, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28214649/evaluation-of-dioxins-and-dioxin-like-compounds-from-a-cement-plant-using-carbide-slag-from-chlor-alkali-industry-as-the-major-raw-material
#2
Yuyang Zhao, Jiayu Zhan, Guorui Liu, Minghui Zheng, Rong Jin, Lili Yang, Liwei Hao, Xiaolin Wu, Xian Zhang, Pu Wang
Carbide slag produced from chlor-alkali industry contains high amounts of calcium compounds and can potentially be used as raw material for cement production; however, it contains large amounts of chlorine so it is essential to evaluate the emissions of chlorinated organic pollutants, including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and polychlorinated naphthalenes (PCNs). A field study of the emission profiles of these pollutants in a cement plant using such slag was performed...
February 14, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28212514/removal-mechanism-of-selenite-by-fe3o4-precipitated-mesoporous-magnetic-carbon-microspheres
#3
Jianwei Lu, Fenglian Fu, Zecong Ding, Na Li, Bing Tang
A mesoporous composite of magnetic carbon microspheres (MCMSs) was synthesized via introducing Fe3O4 nanoscale particles to the surface of carbon microspheres (CMSs) by coprecipitation. Scanning electron microscopy and transmission electron microscopy showed the Fe3O4 nanoscale particles were dispersedly immobilized on the surface of CMSs. The MCMSs demonstrated effective removal of selenite (Se(IV)) from wastewater. MCMSs showed the regular pattern where the lower pH value, the lower residual Se(IV) concentration...
February 14, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28214647/fate-of-antimicrobials-in-duckweed-lemna-minor-wastewater-treatment-systems
#4
Evangelia I Iatrou, Georgia Gatidou, Dimitrios Damalas, Nikolaos S Thomaidis, Athanasios S Stasinakis
The fate of four antimicrobials (cefadroxil, CFD; metronidazole, METRO; trimethoprim, TRI; sulfamethoxazole, SMX) was studied in Lemna minor systems and the role of different mechanisms on their removal was evaluated. All micropollutants were significantly removed in batch experiments with active Lemna minor; the highest removal was observed for CFD (100% in 14 d), followed by METRO (96%), SMX (73%) and TRI (59%) during 24 d of the experiment. Calculation of kinetic constants for hydrolysis, photodegradation, sorption to biomass and plant uptake revealed significant differences depending on the compound and the studied mechanism...
February 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28212513/simultaneous-removal-of-no-and-hg-0-over-ce-cu-modified-v2o5-tio2-based-commercial-scr-catalysts
#5
Guilong Chi, Boxiong Shen, Ranran Yu, Chuan He, Xiao Zhang
A series of novel Ce-Cu modified V2O5/TiO2 based commercial SCR catalysts were prepared via ultrasonic-assisted impregnation method for simultaneous removal of NO and elemental mercury (Hg(0)). Nitrogen adsorption, X-ray diffraction (XRD), temperature programmed reduction of H2 (H2-TPR) and X-ray photoelectron spectroscopy (XPS) were used to characterize the catalysts. 7% Ce-1% Cu/SCR catalyst exhibited the highest NO conversion efficiency (>97%) at 200-400°C, as well as the best Hg(0) oxidation activity (>75%) at 150-350°C among all the catalysts...
February 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28214399/magnetite-platinum-nanoparticles-modified-glassy-carbon-electrode-as-electrochemical-detector-for-nitrophenol-isomers
#6
Giles G Gerent, Almir Spinelli
A glassy carbon electrode was modified with magnetite and platinum nanoparticles stabilized with 3-n-propyl-4-picoline silsesquioxane chloride. This chemically-modified electrode is proposed for the first time for the individual or simultaneous electrochemical detection of nitrophenol isomers. Nanoparticles act as catalysts and also increase the surface area. The polymer stabilizes the particles and provides the electrochemical separation of isomers. Under optimized conditions, the reduction peak currents, obtained by differential-pulse voltammetry, of 2-, 3-, and 4-nitrophenol increased linearly with increases in their concentration in the range of 0...
February 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28208093/oxidative-transformation-of-artificial-sweetener-acesulfame-by-permanganate-reaction-kinetics-transformation-products-and-pathways-and-ecotoxicity
#7
Kai Yin, Fei Li, Ying Wang, Qunying He, Yongxiu Deng, Shuo Chen, Chengbin Liu
Acesulfame has attracted much attention due to its wide application, environmental persistence and potential safety risk of transformation products (TPs). Little information is known on acesulfame transformation in the presence of oxidants/disinfectants. The acesulfame oxidation by permanganate (Mn(VII)) in water under environmentally relevant conditions was systematically evaluated. The pH of water showed negligible influence in acesulfame oxidation. Inorganic ligand (pyrophosphate) exhibited insignificant effect whereas organic ligands (oxalate, ethylene diamine tetraacetic acid, and humic acid) exerted obvious suppression on acesulfame oxidation...
February 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28208089/low-dose-toxicity-of-biogenic-silver-nanoparticles-fabricated-by-swertia-chirata-on-root-tips-and-flower-buds-of-allium-cepa
#8
Nirlipta Saha, S Dutta Gupta
Chemically synthesized silver nanoparticles (chem-AgNPs) have been assessed extensively to show adverse effects on plant cells but the role of biologically synthesized nanoparticles (bio-AgNPs) at lower concentrations and their toxicological impact on plant cells have not been sufficiently studied. In this study, bio-AgNPs were prepared using aqueous leaf extracts of Swertia chirata. This AgNPs showed absorption peak at 440nm of the visible spectrum. TEM analysis revealed that the average size of AgNPs were 20nm and mainly spherical in shape...
February 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28208092/microscopic-evidence-for-humic-acid-induced-changes-in-lead-immobilization-by-phosphate-in-a-counterdiffusion-system
#9
Mei Wang, Zhuo Zhang, Jie Ren, Chao Zhang, Chunping Li, Guanlin Guo, Fasheng Li
Abatement of lead (Pb) contamination in soil via chemical immobilization can reduce potential risks but is influenced by soil organic matter. The aim of this study was to observe and understand the influence of organic matter on Pb immobilization by phosphate. For this purpose, humic acid (HA) was introduced into a counterdiffusion system to mimic ionic reactions of the mineralization processes between the pollutant (Pb) and amendment agent (phosphate) in soil system, and were characterized jointly by in situ optical microscopy and ex situ XRD, SEM, TEM, and LSCM...
February 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28208091/high-temperature-dielectric-properties-of-spent-adsorbent-with-zinc-sulfate-by-cavity-perturbation-technique
#10
Guo Lin, Chenhui Liu, Libo Zhang, Tu Hu, Jinhui Peng, Jing Li, Shixing Wang
Dielectric properties of spent adsorbent with zinc sulfate are investigated by cavity perturbation technique at 2450MHz from 20°C to approximately 1000°C. Two weight loss stages are observed for spent adsorbent by thermogravimetric-differential scanning calorimeter (TG-DSC) analysis, and zinc sulfate is decomposed to ZnO·2ZnSO4 and ZnO at about 750°C and 860°C. Microwave absorption capability of ZnSO4 increases with increasing temperature and declines after ZnO generation on account of the poor dielectric properties...
February 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28214648/toxicity-degradation-and-metabolic-fate-of-ibuprofen-on-freshwater-diatom-navicula-sp
#11
Tengda Ding, Mengting Yang, Junmin Zhang, Bo Yang, Kunde Lin, Juying Li, Jay Gan
Ibuprofen (IBU) is one of the most widely used and frequently detected human pharmaceuticals in aquatic environment. However, the toxicity of IBU on diatom and its fate remain still unkown. In the present study, the toxicity of IBU on the diatom was evaluated by the algal growth rate, the chlorophyll-a and carotenoids contents. The degradation of IBU including in particular the potential for the formation of incomplete degradation products was also explored. Biochemical characteristics of Navicula sp. were significantly inhibited at IBU concentrations up to 50mgL(-1) after 10days of exposure...
February 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28208090/multi-approach-characterization-of-organic-sediment-produced-by-an-anaerobic-digestion-plant-fed-with-pig-slurry-and-stored-for-a-long-term-in-a-lagoon
#12
Anna Ricci, Luisa Massaccesi, Daniela Pezzolla, Giuseppe Corti, Alberto Agnelli, Giovanni Gigliotti
This study combined different approaches to characterize organic sediments produced by an anaerobic digestion plant feed with pig slurry, and accumulated for many years in a lagoon. The results of all analyses identified a certain homogeneity of the sediments. As a consequence of the pig diet, the sediment contained an high concentration of Zn (about 4gkg(-1)) and Cu (about 1.2gkg(-1)), which were mostly associated to the particles with a size ranging from 2 to 53μm. The sediment was made of large amount of organic matter, mostly cellulose and recalcitrant molecules, and 30-40% mineral fraction...
February 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28212512/are-antifouling-paint-particles-a-continuous-source-of-toxic-chemicals-to-the-marine-environment
#13
Sanye Soroldoni, Fiamma Abreu, Ítalo Braga Castro, Fabio Andrei Duarte, Grasiela Lopes Leães Pinho
Antifouling paint particles (APPs) are generated during periodical maintenance of boat hulls. Chemical composition and toxicity (either chronic or acute) of APPs found in the sediment was evaluated using the epibenthic copepod Nitokra sp. The APPs analyzed showed the presence of high levels of metals such as Cu (234,247±268μgg(-1)), Zn (112,404±845μgg(-1)) and the booster biocide DCOIT (0.13μgg(-1)). Even at low concentrations (as from 5mgg(-1) of APPs by mass of sediment) a significantly decrease in the fecundity was observed in laboratory tests...
February 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28183020/biocides-in-wastewater-treatment-plants-mass-balance-analysis-and-pollution-load-estimation
#14
Wang-Rong Liu, Yuan-Yuan Yang, You-Sheng Liu, Li-Juan Zhang, Jian-Liang Zhao, Qian-Qian Zhang, Min Zhang, Jin-Na Zhang, Yu-Xia Jiang, Guang-Guo Ying
This study aimed to investigate the occurrence and removal of 19 biocides in ten different wastewater treatment plants (WWTPs), then estimate the usages and emissions per capita of 19 biocides based on mass balance analysis approach. The results showed that target biocides were universally detected in the WWTPs and their receiving rivers, and 19 for liquid samples and 18 for solid samples. The prominent compound for liquid was DEET (N,N-diethyl-3-methylbenzamide), with its maximum concentration of 393ng/L in influent; while that for solid was triclocarban with its maximum concentration of 2...
February 1, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28212511/arsenic-hyperaccumulator-pteris-vittata-efficiently-solubilized-phosphate-rock-to-sustain-plant-growth-and-as-uptake
#15
Jing-Wei Fu, Xue Liu, Yong-He Han, Hanyi Mei, Yue Cao, Letuzia M de Oliveira, Yungen Liu, Bala Rathinasabapathi, Yanshan Chen, Lena Q Ma
Phosphorus (P) is one of the most important nutrients for phytoremediation of arsenic (As)-contaminated soils. In this study, we demonstrated that As-hyperaccumulator Pteris vittata was efficient in acquiring P from insoluble phosphate rock (PR). When supplemented with PR as the sole P source in hydroponic systems, P. vittata accumulated 49% and 28% higher P in the roots and fronds than the -P treatment. In contrast, non-hyperaccumulator Pteris ensiformis was unable to solubilize P from PR. To gain insights into PR solubilization by plants, organic acids in plant root exudates were analyzed by HPLC...
January 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28183019/kinetics-of-soil-dehydrogenase-in-response-to-exogenous-cd-toxicity
#16
Xiangping Tan, Ziquan Wang, Guannan Lu, Wenxiang He, Gehong Wei, Feng Huang, Xinlan Xu, Weijun Shen
Soil dehydrogenase plays a role in the biological oxidation of soil organic matter and can be considered a good measure of the change of microbial oxidative activity under environmental pollutions. However, the kinetic characteristic of soil dehydrogenase under heavy metal stresses has not been investigated thoroughly. In this study, we characterized the kinetic characteristic of soil dehydrogenase in 14 soil types, and investigated how kinetic parameters changed under spiked with different concentrations of cadmium (Cd)...
January 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28183018/multifold-enhanced-synergistic-removal-of-nickel-and-phosphate-by-a-n-fe-dual-functional-bio-sorbent-mechanism-and-application
#17
Yan-Hong Zhang, Fu-Qiang Liu, Chang-Qing Zhu, Xiao-Peng Zhang, Meng-Meng Wei, Feng-He Wang, Chen Ling, Ai-Min Li
A novel (N,Fe)-dual-functional biosorbent (N/Fe-DB) capable of efficient synergistic removal of Ni(II) and H2PO4(-) from aqueous solution was synthesized. The adsorption capacities of Ni(II) and H2PO4(-) were both remarkably enhanced over 3 times compared with those in single systems. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that complexation of amino groups and ligand exchange of hydrous ferric oxide in N/Fe-DB played dominant roles. The electric double layer compressing and chelating ligand of deprotonated H2PO4(-) accounted for the enhanced removal of Ni(II) in binary system, while cation bridge interaction promoted uptake of H2PO4(-)...
January 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28178639/urinary-metabolites-of-polycyclic-aromatic-hydrocarbons-sperm-dna-damage-and-spermatozoa-apoptosis
#18
Pan Yang, Yi-Xin Wang, Li Sun, Ying-Jun Chen, Chong Liu, Li-Li Huang, Wen-Qing Lu, Qiang Zeng
Inconsistent results between polycyclic aromatic hydrocarbons (PAHs) exposure and adverse male reproductive health have been reported in humans. To assess whether PAH exposure is associated with declined sperm function. Ten monohydroxylated PAHs (OH-PAHs) metabolites were analyzed in repeated urine samples from an infertility clinic. We used multivariable linear models to estimate the associations of urinary OH-PAH metabolites with sperm DNA damage (n=405) and spermatozoa apoptosis (n=366). The shapes of dose-dependent associations of exposure measurements with outcomes were further evaluated by restricted cubic splines...
January 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28159364/corrigendum-to-synthesis-of-manganese-incorporated-hierarchical-mesoporous-silica-nanosphere-with-fibrous-morphology-by-facile-one-pot-approach-for-efficient-catalytic-ozonation-j-hazard-mater-2016-10-1016-j-jhazmat-2016-07-015
#19
Shahzad Afzal, Xie Quan, Shuo Chen, Jing Wang, Dost Muhammad
No abstract text is available yet for this article.
January 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28178638/fast-photoelectro-reduction-of-cr-vi-over-mos2-tio2-nanotubes-on-ti-wire
#20
Lixia Yang, Xutong Zheng, Ming Liu, Shenglian Luo, Yan Luo, Guifa Li
A stable MoS2 nanosheets@TiO2 NTAs composite was prepared via a simple hydrothermal process. Few-layer MoS2 nanosheets distributed on the TiO2 nanotube top surface and the inner walls rather than filling in the tubes, allowing abundant tubular channels open to environment and benefiting for efficient mass transport. Photocatalytic (PE) and photoelectrocatalytic (PEC) performance of the composite were evaluated on Cr(VI) reduction, with variable low molecule weight organic acids (LOAs) added as sacrificial electron donor to form a charge-transfer-complex (CTC) between LOAs and TiO2/MoS2, which is sensitive to the visible light illumination and could induce the photo-reduction of Cr(VI) and photo-oxidation of LOAs...
January 30, 2017: Journal of Hazardous Materials
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