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Journal of Hazardous Materials

A Alpatova, A Alsaadi, N Ghaffour
The volatilization of boron in thermal desalination processes, namely multi-stage flash (MSF) and air-gap membrane distillation (AGMD) was investigated for the first time. This phenomenon was observed at feed temperatures above 55 °C in both studied processes. In simulated MSF process with two feeds, model boric acid and Red Sea water, boron concentration in distillate increased with feed temperature increase from 55 °C to 104 °C because of the increase in boric acid vapor pressure. Salinity and pH were the main factors controlling boron evaporation...
March 15, 2018: Journal of Hazardous Materials
Yanshuai Xing, Xiaoshuang Meng, Lei Wang, Junjie Zhang, Zijing Wu, Xinying Gong, Chenye Wang, Hongwen Sun
Triazole contaminants in water and soil environments can form complexes with metal ions, and therefore affect the bioavailability and toxicity of some heavy metals. In present study, significant increase of copper (Cu) uptake by earthworm (Eisenia fetida) was observed when combined pollution of benzotriazole (BTR) presented in soil. For instance, Cu accumulation in earthworms increased 55% approximately when BTR presented at the BTR/Cu molar ratio of 1:2.5. While the single Cu exposure (at 32 mg kg-1 in soil) resulted in increased malondialdehyde (MDA) content in earthworms from 0...
March 12, 2018: Journal of Hazardous Materials
Bo Gan, Bei Li, Haipeng Jiang, Mingshu Bi, Wei Gao
The suppressions of ultrafine water mists containing additives (NaCl and NaHCO3 ) on 100 nm, 5 μm, and 30 μm polymethyl methacrylate (PMMA) dust explosions were experimentally studied in a dust-explosion apparatus. High-speed photography showed that maximum vertical positions and flame propagation velocities were significantly decreased by suppression with ultrafine water mist/additives. Flame propagation velocities in 100 nm, 5 μm, and 30 μm dust explosions suppressed by the ultrafine pure water mist were reduced by 48...
March 10, 2018: Journal of Hazardous Materials
Lihua Jiang, Qingsong Wang, Jinhua Sun
LiNix Coy Mnz O2 (NCM) cathode material with high energy density is one of the best choices for power batteries. But the safety issue also becomes more prominent with higher nickel content. The improvement of thermal stability by material modification is often complex and limited. In this study, a composite safety electrolyte additive consisting of perfluoro-2-methyl-3-pentanone, N, N-Dimethylacetamide (and fluorocarbon surfactant is proved to be effective and simple in improving the thermal stability of NCM materials...
March 10, 2018: Journal of Hazardous Materials
Xianyong Feng, Peifang Wang, Jun Hou, Jin Qian, Yanhui Ao, Chao Wang
In the present work, we reported a simple method for the simultaneous phosphorus (P) doping and oxygen vacancies creation on TiO2 in a single step. The obtained P-doped TiO2 with surface oxygen vacancies (PTSOV) samples exhibited efficient photocatalytic activity for the degradation of fluoroquinolone antibacterial agent (ciprofloxacin) under visible light irradiation. The optimized sample showed a rate constant of 0.065 min-1 for degradation of ciprofloxacin (CIP) and it was about 16.2 times as high as that of TiO2 (0...
March 10, 2018: Journal of Hazardous Materials
Changwoo Nam, Gang Zhang, T C Mike Chung
In this research, a series of different two polyolefin-based interlaced polymer network material was prepared with a semi-crystalline linear low density polyethylene (LLDPE, thermoplastic) and a crosslinked 1-decene/divinylbenzene (1-D/DVB, elastomer) having high crude oil absorption capacity. The prepared absorbents, LLDPE/D/DVB, were characterized by NMR, TEM, contact angle measurement and TGA analysis. It was observed that the mixing ratio of two interlaced polymer network played a crucial role in determining its crude oil absorption capacity...
March 9, 2018: Journal of Hazardous Materials
ChuanYang Cai, ShuangYu Yu, XinYue Li, Yu Liu, Shu Tao, WenXin Liu
Two typical types of electronic waste (E-waste) were selected to investigate the emission characteristics of polycyclic aromatic hydrocarbons (PAHs) during pyrolytic processing, including emission factor, compositional profile, size distribution and gas-particle partitioning. The mean emission factors (EFs) of total PAHs were measured to be 2.77 ± 1.41 μg/g and 23.65 ± 14.52 μg/g for printed wiring boards and plastic casings, respectively, lower than those for coal combustion and biomass burning...
March 9, 2018: Journal of Hazardous Materials
Misagh Ghobadi, Mahdi Gharabaghi, Hadi Abdollahi, Zohreh Boroumand, Marzieh Moradian
In recent decades, considerable amounts of rare earth elements have been used and then released into industrial wastewater, which caused serious environmental problems. In this work, in order to recycle rare earth cations (La3+ and Ce3+ ) from aqueous solutions, MnFe2 O4 -Graphene oxide magnetic nanoparticles were synthesized and after characterization studies, their adsorption isotherms, kinetics, thermodynamics and desorption were comprehensively investigated. Characterized was performed using XRD, FE-SEM, FT-IR, Raman spectroscopy, VSM, BET and DLS...
March 8, 2018: Journal of Hazardous Materials
Rebeca Martinez-Haya, Consuelo Sabater, Maria-Ángeles Castillo, Miguel A Miranda, M Luisa Marin
Photocatalytic degradation of three highly chlorinated contaminants, namely 2,4,6-trichlorophenol (TCP), 2,4,6-trichloroanisole (TCA) and 5-chloro-2-(2,4-dichlorophenoxy)phenol (triclosan, TCS) has been investigated in the presence of N-methylquinolinium tetrafluoroborate (NMQ+ ), a photocatalyst able to act via Type I or Type II mechanism. Photodegradation of contaminants under aerobic conditions was achieved within hours; and it was accompanied by mineralization, as demonstrated by trapping of the evolved carbon dioxide as barium carbonate...
March 8, 2018: Journal of Hazardous Materials
Dong Li, Xiaolei Guo, Haoran Song, Tianyi Sun, Jiafeng Wan
Graphite-like material is widely used for preparing various electrodes for wastewater treatment. To enhance the electrochemical degradation efficiency of Nano-graphite (Nano-G) anode, RuO2 -TiO2 /Nano-G composite anode was prepared through the sol-gel method and hot-press technology. RuO2 -TiO2 /Nano-G composite was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and N2 adsorption-desorption. Results showed that RuO2 , TiO2 and Nano-G were composited successfully, and RuO2 and TiO2 nanoparticles were distributed uniformly on the surface of Nano-G sheet...
March 8, 2018: Journal of Hazardous Materials
Xi-Hui Xu, Xiao-Mei Liu, Long Zhang, Yang Mu, Xu-Yuan Zhu, Jing-Ya Fang, Shun-Peng Li, Jian-Dong Jiang
Although bioaugmentation of pollutant-contaminated sites is a great concern, there are few reports on the relationships among indigenous microbial consortia, exogenous inocula, and pollutants in a bioaugmentation process. In this study, bioaugmentation with Pseudochrobactrum sp. BSQ1 and Massilia sp. BLM18, which can hydrolytically and reductively dehalogenate chlorothalonil (TPN), respectively, was studied for its ability to remove TPN from soil; the alteration of the soil microbial community during the bioaugmentation process was investigated...
March 8, 2018: Journal of Hazardous Materials
Mako Funada, Takeshi Nakano, Hiroshi Moriwaki
A novel clean-up technology to remove polycyclic aromatic hydrocarbons (PAHs) from solid samples by magnetic separation using a composite containing iron powder as a magnetic material and activated carbon as an adsorbent in the freeze-dried calcium alginate matrix (Fe-AC-alg) has been developed. The Fe-AC-alg powder (50 mg), mixed with 1.0 g of glass beads having 12 kinds of adsorbed PAHs, was shaken without adding solvents at 300 rpm. After shaking, the Fe-AC-alg powder was separated using a permanent magnet...
March 8, 2018: Journal of Hazardous Materials
Longfei Liu, Deyun Li, Chengliang Li, Rong Ji, Xiaofei Tian
Due to considerable application of perfluorooctanoic acid (PFOA) and its refractory degradation, the widespread distribution of PFOA has already resulted in its' risks to environment and organisms. However, the intrinsic characteristic of pristine multi-walled carbon nanotubes (MWCNTs) limited their application for removing PFOA from aqueous medium. Therefore, three nano-metals (nano-crystalline iron, copper and zinc) grafted MWCNTs were synthesized and characterized by BET-N2 , TEM, FTIR, XPS and XRD as well as MWCNTs (as the control treatment) in this study...
March 8, 2018: Journal of Hazardous Materials
Khushboo Patel, Basant Roondhe, Shweta D Dabhi, Prafulla K Jha
Recently predicted and grown new single element two dimensional (2D) material borophene gathered tremendous research interest due to its structural, electronic and other properties. Using first principles based dispersion corrected density functional calculations, we have studied interaction of two toxic gases phosgene (COCl2 ) and carbon monoxide (CO) with borophene to understand the role of borophene as biosensor and carriers in drug delivery. The sensing behaviour of borophene towards COCl2 and CO has been studied by calculating the binding energy and electronic density of states (DOS)...
March 7, 2018: Journal of Hazardous Materials
Krishnendu Pramanik, Soumik Mitra, Anumita Sarkar, Tushar Kanti Maiti
Heavy metal resistant PGPR mediated bioremediation, phytostimulation and stress alleviation is an eco-friendly method for sustainable agriculture in the metal contaminated soil. The isolation of such PGPR is highly demanding to reduce heavy metals in contaminated cultivated fields for agricultural benefit. The present study was successful to isolate a potent multi-heavy metal resistant PGPR strain, identified as Enterobacter aerogenes strain K6 based on MALDI-TOF MS, FAME analysis and 16S rDNA sequence homology, from rice rhizosphere contaminated with a variety of heavy metals/metalloid near industrial area...
March 7, 2018: Journal of Hazardous Materials
Neng-Min Zhu, Yan-Sheng Xu, Lichun Dai, Yun-Fei Zhang, Guo-Quan Hu
Zerovalent iron (ZVI) is an environmental-friendly reactive reagent for recovering heavy metals. However, the detailed recovery mechanism remains unclear due to a lack of quantitative analysis of recovery products. Herein, microscale ZVI, nanoscale ZVI and Ni/Fe nanoparticles were used to recover Pb(II) in aqueous solution and a sequential extraction procedure (SEP) was applied to determine the formed lead species quantitatively. At high initial Pb(II) concentration (500 mg L-1 ), more than 99.5% of Pb(II) was immobilized by Ni/Fe and n-ZVI, whereas m-ZVI caused inferior recovery efficiency (<25%)...
March 6, 2018: Journal of Hazardous Materials
Jing Ding, Liangliang Wei, Huibin Huang, Qingliang Zhao, Weizhu Hou, Felix Tetteh Kabutey, Yixing Yuan, Dionysios D Dionysiou
This study presents an integrated Electro-Oxidation/Electro-Coagulation/Electro-Reduction (EO/EC/ER) process for tertiary landfill leachate treatment. The influence of variables including leachate characteristics and operation conditions on the performance of EO/EC/ER process was evaluated. The removal mechanisms were explored by comparing results of anode, cathode, and bipolar electrode substitution experiments. The performance of the process in a scaled-up reactor was investigated to assure the feasibility of the process...
March 6, 2018: Journal of Hazardous Materials
Hao Zhou, Guochen Wang, Minghuo Wu, Weiping Xu, Xuwang Zhang, Lifen Liu
A moving bed biofilm reactor (MBBR) effectively removes pollutants and even runs under extreme conditions. However, the pH shock resistance of a biofilm in MBBRs has been rarely reported. In this study, simulated phenol wastewater with acidic shock (pH 7.5-3.0) was used. In the pH shock phase, the phenol and COD removal efficiencies initially decreased and gradually increased to more than 90%. Microscopic studies showed that the superficial biofilm was mainly composed of fungi (yeasts) in the acidic pH shock phase...
March 5, 2018: Journal of Hazardous Materials
Mohsen Behbahani, Boren Lin, Tamara L Phares, Youngwoo Seo
The objective of this study is to evaluate the influence of water distribution system conditions (pH, total organic carbon, residual chlorine, and phosphate) on haloacetic acids (HAAs) biodegradation. A series of batch microcosm tests were conducted to determine biodegradation kinetics and collected biomass was used for real time quantitative reverse transcription polymerase chain reaction analyses to monitor how these drinking water distribution system conditions affect the relative expression of bacterial dehalogenase genes...
March 3, 2018: Journal of Hazardous Materials
Guang-Wen Lien, Jung-Hsuan Chen, Fang-Wei Tien, Pau-Chung Chen, Huei-Wen Chen, Hsaio-Lin Hwa, Cheng-Chung Fang, Te-I Weng, Pai-Shan Chen
Phthalates are not covalently bound to plastics. They can leach from experimental plastic devices. Due to the development of sensitive techniques, exogenous sources that interfere with the accuracy of phthalate monoester analysis can be easily detected. Here, we propose the simple and rapid dilute-and-shoot method to minimize sample handling and limit contact with laboratory apparatus, which efficiently reduced phthalate interferences mainly from experimental plasticware and improved the accuracy of analysis...
March 3, 2018: Journal of Hazardous Materials
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