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Journal of Hazardous Materials

Teemu Kinnarinen, Mohammad Golmaei, Eeva Jernström, Antti Häkkinen
The objective of this study is to introduce a treatment sequence enabling straightforward and effective recovery of hazardous trace elements from recovery boiler fly ash (RBFA) by a novel method, and to demonstrate the subsequent removal of Cl and K with the existing crystallization technology. The treatment sequence comprises two stages: dissolution of most other RBFA components than the hazardous trace elements in water in Step 1 of the treatment, and crystallization of the process chemicals in Step 2. Solid-liquid separation has an important role in the treatment, due to the need to separate first the small solid residue containing the trace elements, and to separate the valuable crystals, containing Na and S, from the liquid rich in Cl and K...
November 18, 2017: Journal of Hazardous Materials
Yaocheng Deng, Lin Tang, Chengyang Feng, Guangming Zeng, Jiajia Wang, Yaoyu Zhou, Yani Liu, Bo Peng, Haopeng Feng
To realize the full utilization of solar energy, the design of highly efficient photocatalyst with improved visible-near-infrared photocatalysis performance has attracted great attentions for environment pollutant removal. In this work, we rationally employed the surface plasmon resonance effect of metallic Ag in the phosphorus doped ultrathin g-C3N4 nanosheets (PCNS) and BiVO4 composites to construct a ternary Ag@PCNS/BiVO4 photocatalyst. It was applied for the photodegradation of ciprofloxacin (CIP), exhibiting 92...
November 15, 2017: Journal of Hazardous Materials
Zhuoyan He, Dehua Xia, Yajing Huang, Xiuqin Tan, Chun He, Lingling Hu, Huanjunwa He, Jiawei Zeng, Wenjun Xu, Dong Shu
A heterogeneous catalytic ozonation/membrane filtration (HCOMF) system was fabricated by integrating a flat-plate polyvinylidene fluoride (PVDF) membrane module along with a slurry catalytic ozonation reactor. The performance and catalytic activity of HCOMF was evaluated for degradation of model wastewater containing bisphenol A (BPA) and humid acid (HA) under different permeation flux in long-term continuous experiments. The membrane fouling was investigated by trans-membranous pressure (TMP), membrane filtration resistance, scanning electronic microscopy (SEM), and fluorescence spectra...
November 14, 2017: Journal of Hazardous Materials
Tangqin Wu, Haodong Chen, Qingsong Wang, Jinhua Sun
The thermal stability evaluation of materials in a soft-pack commercial cell is tested using C80 calorimeter, including anode, cathode, separator and full cell (mixing of the three materials including additional electrolyte). Thermal runaway characteristic of the commercial cell is tested on the accelerating rate calorimeter (ARC) with two heating modes, including internal heating mode and external heating mode. The results show that the thermal stability of internal material for tested cell follows the below order: anode<separator<cathode...
November 13, 2017: Journal of Hazardous Materials
Shao-Lin Xie, Muhammad Junaid, Wan-Ping Bian, Juan-Juan Luo, Jabir Hussain Syed, Chao Wang, Wen-Xu Xiong, Yan-Bo Ma, Aping Niu, Xiao-Jun Yang, Ji-Xing Zou, De-Sheng Pei
The polycyclic aromatic hydrocarbons (PAHs) and 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) are classified as human carcinogens, and can also cause serious health problems. To develop a convenient bio-monitoring tool for the detection of PAHs and TCDD in the environment, we generated a transgenic zebrafish line Tg(cyp1a:mCherry) with cyp1a promoter driving mCherry expression. Here, Tg(cyp1a:mCherry) embryos were treated with different concentrations of TCDD and five US EPA priority PAHs congeners. The results showed that the expressions of mCherry and endogenous cyp1a were consistent with the PAHs exposure concentrations and were largely induced by TCDD and ≥4-ring PAHs...
November 13, 2017: Journal of Hazardous Materials
Xun Qian, Jie Gu, Wei Sun, Xiao-Juan Wang, Jian-Qiang Su, Robert Stedfeld
Aerobic composting is used widely for animal manure recycling, and it may reduce the amount of antibiotic resistance genes (ARGs) that enter the environment. We sampled three types of animal (bovine, chicken, and pig) manure and the corresponding composts from 12 large-scale farms, and tested multiple ARGs and mobile genetic elements (MGEs) by high-throughput qPCR. A total of 109 ARGs were detected in the manure and compost samples, thereby demonstrating that both are important ARG reservoirs. The diversity and abundance of ARGs were significantly higher in chicken and pig manure than bovine manure, but industrial composting was more efficient at reducing the ARGs in chicken manure than pig and bovine manure...
November 13, 2017: Journal of Hazardous Materials
Xiang Li, Yongkui Zhang, Yi Xie, Yu Zeng, Panyu Li, Tonghui Xie, Yabo Wang
Schwertmannite (Sch) was synthesized by Acidithiobacillus ferrooxidans and used as Fenton-like catalyst for bisphenol A (BPA) degradation combining with ultrasonic technology (US). Physicochemical characterizations showed that the bio-synthesized Sch particles had a pompon-like morphology with high BET surface area of 92.92m(2)/g. The degradation reaction showed a two-stage pseudo-first-order kinetic process consisting of an induction period and a followed rapid degradation period. A synergistic effect existed between US and Sch on activating H2O2 and the synergy factor was calculated to be 2...
November 12, 2017: Journal of Hazardous Materials
Gang Xu, Lu Wang, Yujia Xie, Minli Tao, Wenqin Zhang
Mercury ions, even an ultra-trace amount in water, present a serious environmental concern. Hence, searching for cost-effective and high-performance Hg(2+) adsorbents has acquired increasingly attention but still remained challenging. In this work, aminophosphonic acid was immobilized onto polyacrylonitrile fiber by chemical grafting approaches. The functionalized fiber (PANAPF) possessed high adsorption selectivity and efficiency for Hg(2+) when compared with other coexisting ions viz. Pb(2+), Cd(2+), Ag(+), Zn(2+), Cu(2+), Ni(2+), Co(2+), Ca(2+) and Mg(2+)...
November 11, 2017: Journal of Hazardous Materials
Thomas Krauße, Eileen Schütze, René Phieler, David Fürst, Dirk Merten, Georg Büchel, Erika Kothe
Microbiome analyses of soils and microcosm experiments depend on conditions that include sterilization in order to perform experimental manipulation of microbial communities. Still, they should represent conditions close to nature. When using metal contaminated soils, sterilization methods might alter metal availability. Here, four typical metal contaminated substrates were analyzed, representing different contamination histories and soil types. They included two very poor substrates, as they are often found at metal contaminated sites...
November 10, 2017: Journal of Hazardous Materials
Leonel Vinicius Constantino, Juliana Nunes Quirino, Taufik Abrão, Paulo Sérgio Parreira, Alexandre Urbano, Maria Josefa Santos
Calcined hydrotalcite can be applied to remove anionic contaminants from aqueous systems such as antimony species due to its great anion exchange capacity and high surface area. Hence, this study evaluated antimonite and antimonate sorption-desorption processes onto calcined hydrotalcite in the presence of nitrate, sulfate and phosphate. Sorption and desorption experiments of antimonite and antimonate were carried out in batch equilibrium and the post-sorption solids were analyzed by X-ray fluorescence (EDXRF)...
November 10, 2017: Journal of Hazardous Materials
Gabriel Sigmund, Caroline Poyntner, Guadalupe Piñar, Melanie Kah, Thilo Hofmann
Diffusely contaminated soils often remain untreated as classical remediation approaches would be disproportionately expensive. Adding compost can accelerate the biodegradation of organic contaminants and adding biochar can immobilize contaminants through sorption. The combined use of compost and biochar to reduce polycyclic aromatic hydrocarbon (PAH) and NSO-substituted PAH contamination has, however, not previously been systematically investigated. We have therefore investigated the processes involved (i) through sorption batch experiments, (ii) by monitoring changes in bacterial, fungal and archaeal communities using denaturing gradient gel electrophoresis, and (iii) through degradation experiments with fluorene, phenanthrene, pyrene, carbazole, dibenzothiophene, and dibenzofuran...
November 10, 2017: Journal of Hazardous Materials
Jianfeng Feng, Yongfei Gao, Yijun Ji, Lin Zhu
Predicting the toxicity of chemical mixtures is difficult because of the additive, antagonistic, or synergistic interactions among the mixture components. Antagonistic and synergistic interactions are dominant in metal mixtures, and their distributions may correlate with exposure concentrations. However, whether the interaction types of metal mixtures change at different time points during toxicodynamic (TD) processes is undetermined because of insufficient appropriate models and metal bioaccumulation data at different time points...
November 10, 2017: Journal of Hazardous Materials
Hong Chen, Jianhui Lin, Ning Zhang, Liangzhe Chen, Shuiping Zhong, Yao Wang, Wengong Zhang, Qidan Ling
Adsorption is recognized as one of the most promising technologies applied to remove heavy metals from contaminated water. However, the adsorption efficiency often decreases because of the aggregation and loss of adsorbents. Herein, a novel adsorbent was synthesized by intercalation ethylenediaminetetraacetic acid (EDTA) into layered double hydroxides (LDH) and subsequent encapsulated into PAN polymer matrix using electrospinning. The synthesized electrospun nanofiber membrane (MgAl-EDTA-LDH@PAN) was found to combine the advantages of LDH@PAN nanofiber membrane (high surface area, easy to separate, free from aggregation and loss) and EDTA (powerful chelating agent)...
November 8, 2017: Journal of Hazardous Materials
Fujun Ma, Bin Wu, Qian Zhang, Deshan Cui, Qingbing Liu, Changsheng Peng, Fasheng Li, Qingbao Gu
Stabilization/solidification (S/S) has been successfully employed in many superfund sites contaminated with organic materials. However, this method's long-term effectiveness has not been fully evaluated and the increase in soil volume following treatment is unfavorable to follow-up disposal. The present study developed a novel method for the S/S of PAHs-contaminated soil with the facilitation of sulfonated oil (SO). Adding SO significantly improved the unconfined compressive strength (UCS) values of Portland cement and activated carbon (PC-AC) treated soil samples, and the UCS values of the soil sample treated with 0...
November 7, 2017: Journal of Hazardous Materials
Yan-Ping Guo, Yong-You Hu, Hui Lin, Xue-Lian Ou
Many studies have addressed the desorption and mobilization performances of sorbed contaminants affected by different rhamnolipidic biosurfactants. Study results have been mixed and complicated. Rhamnolipids are always microbial produced with variable homologues. In this study, two representative rhamnolipidic fractions (i.e., RL-F1 and RL-F2, which are mono- and di-rhamnolipids, respectively) were investigated and compared to determine their influence on 17α-ethynylestradiol (EE2) distribution within sediment-water sorption and desorption systems...
November 7, 2017: Journal of Hazardous Materials
Siyang Li, Jinxi Feng, Shuanghong Tian, Shenyu Lan, Chao Fan, Xiaosheng Liu, Ya Xiong
For the first time, paint sludge waste (PS) was used as a pore forming agent in the preparation of sewage sludge derived carbon (SC). The tuning role and mechanism of PS for characteristics of SC were explored. It was found that a sludge carbon (SCPS-Zn) with rich macro-, meso- and micro- porous could be produced by one-step pyrolytic process of sludge in the presence of PS and ZnCl2. Its surface area could reach as high as 680.5m(2)g(-1) as 88.4 times and 4.8 times of sludge carbon without addition of PS and ZnCl2 (SC) and only addition of ZnCl2 (SCZn), respectively...
November 7, 2017: Journal of Hazardous Materials
Peiyuan Xiao, Pei Wang, Huimin Li, Qiuyun Li, Yanpeng Shi, Xi-Lin Wu, Hongjun Lin, Jianrong Chen, Xiangke Wang
In this work, nitrogen-rich graphene-like carbon sheets (N-GLCS) with high specific surface area (488.4m(2)/g), narrow pore distribution and high N-doping (18.4 at%) were prepared and applied as both adsorbent and catalyst for the removal of bisphenols. Adsorption experiments demonstrated the high adsorption capacities of the N-GLCS toward bisphenol F (BPF) (222.9mg/g), bisphenol A (BPA) (317.8mg/g), and bisphenol C (BPC) (540.4mg/g). Results showed that about 98.6% of BPA (70mg/L) was removed at pH 7.0 within 80min after the adsorption-catalytic degradation process...
November 7, 2017: Journal of Hazardous Materials
Smaail Radi, Chahrazad El Abiad, Nuno M M Moura, Maria A F Faustino, M Graça P M S Neves
The pollution of water resources due to the disposal of toxic heavy metals has been a growing global concern for the last decades. For this purpose, the search for effective and economic material based adsorbents is required, due to the efficiency of the process. In this work, a novel inorganic-organic hybrid material based on silica chemically modified with a porphyrin (SiNTPP), with a high metal removal efficiency, was developed. The new material was characterized using a set of suitable techniques such as (13)C NMR of the solid state, elemental analysis, FTIR, nitrogen adsorption-desorption isotherm, BET surface area, BJH pore sizes and scanning electron microscopy (SEM)...
November 7, 2017: Journal of Hazardous Materials
Adam Lang, Dirk Engelberg, Nicholas T Smith, Divyesh Trivedi, Owen Horsfall, Anthony Banford, Philip A Martin, Paul Coffey, William R Bower, Clemens Walther, Martin Weiß, Hauke Bosco, Alex Jenkins, Gareth T W Law
Laser Induced Breakdown Spectroscopy (LIBS) has the potential to allow direct, standoff measurement of contaminants on nuclear plant. Here, LIBS is evaluated as an analytical tool for measurement of Sr and Cs contamination on type 304 stainless steel surfaces. Samples were reacted in model acidic (PUREX reprocessing) and alkaline (spent fuel ponds) Sr and Cs bearing liquors, with LIBS multi-pulse ablation also explored to measure contaminant penetration. The Sr II (407.77nm) and Cs I (894.35nm) emission lines could be separated from the bulk emission spectra, though only Sr could be reliably detected at surface loadings >0...
November 7, 2017: Journal of Hazardous Materials
Mohammed J Ajrash, Jafar Zanganeh, Behdad Moghtaderi
Venting is often used in process industries to reduce the possibility of dangerous rises in pressure levels and the severity of explosions. To date, the effectiveness of side-on venting on methane flame deflagration in large scale operations has not been clearly addressed. This work explicitly investigates the influences of side-on venting on varied methane flame deflagration concentrations in a 30m long Detonation Tube (DT). RESULTS: corresponding to this study prove the existence of a significant correlation between the fire and explosion driving parameters such as pressure rise and flame propagation velocity with the vent location...
November 7, 2017: Journal of Hazardous Materials
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