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Journal of Environmental Sciences (China)

Cancan Xu, Rui Liu, Lvjun Chen, Jialu Tang
Ni/Fe-Fe3O4 nanocomposites were synthesized for dechlorination of 2,4-dichlorophenol (2,4-DCP). The effects of the Ni content in Ni/Fe-Fe3O4 nanocomposites, solution pH, and common dissolved ions on the dechlorination efficiency were investigated, in addition to the reusability of the nanocomposites. The results showed that increasing content of Ni in Ni/Fe-Fe3O4 nanocomposites, from 1 to 5wt.%, greatly increased the dechlorination efficiency; the Ni/Fe-Fe3O4 nanocomposites had much higher dechlorination efficiency than bare Ni/Fe nanoparticles...
October 2016: Journal of Environmental Sciences (China)
Yong Cui, Shuming Liu, Kate Smith, Hongying Hu, Fusheng Tang, Yuhong Li, Kanghua Yu
Stainless steels generally have extremely good corrosion resistance, but are still susceptible to pitting corrosion. As a result, corrosion scales can form on the surface of stainless steel after extended exposure to aggressive aqueous environments. Corrosion scales play an important role in affecting water quality. These research results showed that interior regions of stainless steel corrosion scales have a high percentage of chromium phases. We reveal the morphology, micro-structure and physicochemical characteristics of stainless steel corrosion scales...
October 2016: Journal of Environmental Sciences (China)
Debananda Roy, Gurdeep Singh, Pankaj Yadav
Source apportionment study of PM10 (Particulate Matter) in a critically polluted area of Jharia coalfield, India has been carried out using Dispersion model, Principle Component Analysis (PCA) and Chemical Mass Balance (CMB) techniques. Dispersion model Atmospheric Dispersion Model (AERMOD) was introduced to simplify the complexity of sources in Jharia coalfield. PCA and CMB analysis indicates that monitoring stations near the mining area were mainly affected by the emission from open coal mining and its associated activities such as coal transportation, loading and unloading of coal...
October 2016: Journal of Environmental Sciences (China)
Jeffrey Tao, Lily Xiao Jing Sun, X Chris Le
No abstract text is available yet for this article.
October 2016: Journal of Environmental Sciences (China)
Rongle Xu, Yaobo Fan, Yuansong Wei, Yawei Wang, Nan Luo, Min Yang, Xing Yuan, Rong Yu
Both internal carbon source and some external carbon sources were used to improve the nutrient removal in Anaerobic-Anoxic-Oxic-Membrane Bioreactor (A(2)/O-MBRs), and their technical and cost analysis was investigated. The experimental results showed that the nutrient removals were improved by all the carbon source additions. The total nitrogen and phosphorus removal efficiency were higher in the experiments with external carbon source additions than that with internal carbon source addition. It was found that pathways of nitrogen and phosphorus transform were different dependent on different carbon source additions by the mass balance analysis...
October 2016: Journal of Environmental Sciences (China)
Jixing Liu, Fuhong Yu, Jian Liu, Lifeng Cui, Zhen Zhao, Yuechang Wei, Qianyao Sun
A series of meso-microporous Cu-SAPO-34 catalysts were successfully synthesized by a one-pot hydrothermal crystallization method, and these catalysts exhibited excellent NH3-SCR performance at low temperature. Their structure and physic chemical properties were characterized by means of X-ray diffraction patterns (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), N2 sorption-desorption, nuclear magnetic resonance (NMR), Inductively Coupled Plasma-Atomic Emission spectrometer (ICP-AES), X-ray absorption spectroscopy (XPS), Temperature-programmed desorption of ammonia (NH3-TPD), Ultraviolet visible diffuse reflectance spectroscopy (UV-Vis DRS) and Temperature programmed reduction (TPR)...
October 2016: Journal of Environmental Sciences (China)
Xuewen Tao, Fuqiang Liu, Zhiping Bai, Dongyang Wei, Xiaopeng Zhang, Junfei Wang, Jie Gao, Xiaowen Sun, Baohua Li, Chenghui Li, Aimin Li
An efficient and profitable separation process was proposed to prepare 5N (the purity of the metal solution reaches 99.999%) high-purity nickel from 3N nickel-solutions using Purolite S984. The adsorption performance of this superior resin, especially its selectivity for metal ions, was explored quantitatively. The maximum adsorption capacity for copper was 2.286mmol/g calculated by the Langmuir model, which was twice as large as that for nickel. In the binary systems, the adsorption capacity for nickel was decreased by 45%, indicating direct competition for the active sites...
October 2016: Journal of Environmental Sciences (China)
Zhongli Chen, Andreas Schäffer
The anti-seasonal hydrology with 30m water fluctuations in the Three Gorges Reservoir (TGR) of China attracts growing environmental and ecological concerns. We investigated the biotransformation of the herbicide propanil in plants dominating in the littoral zone of the TGR by applying the (14)C-ring-labeled herbicide into non-aseptic hydroponic plant systems (Cynodon dactylon, Nelumbo nucifera and Bidens pilosa), aseptic plants (Lemna minor and Lemna gibba) and cell suspension cultures (C. dactylon and L. minor)...
October 2016: Journal of Environmental Sciences (China)
Xiaojia He, Donee' McAlliser, Winfred G Aker, Huey-Min Hwang
Titanium dioxide nanoparticles (TiO2 NPs) are among the most widely manufactured nanomaterials on a global scale. However, prudent and vigilant surveillance, incumbent upon the scientific community with the advent of new technologies, has revealed potentially undesirable effects of TiO2 NPs on biological systems and the natural environment during their application and discharge. Such effects are likely best evaluated by first assessing the fate of the TiO2 NPs in natural environments. In this study, the effects of terrestrial humic acid (HA) and tannic acid (TA), two major members of the collective: dissolved organic matter (DOM), on the cytotoxicity of TiO2 NPs to Escherichia coli were investigated in the presence and absence of natural sunlight...
October 2016: Journal of Environmental Sciences (China)
Junjian An, Guangyan Zhang, Rongfeng Zheng, Peng Wang
BiFeO3-g-C3N4 nanoscaled composite was prepared with a hydrothermal method and evaluated as a highly efficient photo-Fenton like catalyst under visible light irradiation. The BiFeO3-g-C3N4 composite exhibited much stronger adsorption ability to lignin model pollutant (guaiacol) than that of BiFeO3, which may be due to the higher specific surface area (BiFeO3-g-C3N4: 35.59m(2)/g>BiFeO3: 7.42m(2)/g) and the adsorption form of π-π stack between g-C3N4 and guaiacol. The composite exhibited excellent visible light-Fenton like catalysis activity, being influenced by the solution pH value and the proportions of BiFeO3 and g-C3N4 nanosheets...
October 2016: Journal of Environmental Sciences (China)
Fang Li, Jing Jin, Dongqin Tan, Longxing Wang, Ningbo Geng, Rong Cao, Yuan Gao, Jiping Chen
Hexabromocyclododecane (HBCD) and tetrabromobisphenol A (TBBPA) are two kinds of brominated flame retardants and widely present in the environment and biota. The levels, spatial distributions and mass inventories of HBCD and TBBPA were investigated in sediments and paddy soils from the Liaohe River Basin in northeast China. The concentrations of ΣHBCD and TBBPA were in the range of not detected (nd) to 4.02ng/g dry weight (dw) and 0.03 to 4.06ng/g dw, respectively. γ-HBCD was dominated in sediments, while the abundance of α-HBCD was relatively high in paddy soils...
October 2016: Journal of Environmental Sciences (China)
Ying Zhang, Chaojie Zhang, Xuan Zhang, Leiyu Feng, Yongmei Li, Qi Zhou
Alkaline treatment with steel slag and NaOH addition were investigated under different pH conditions for the fermentation of waste activated sludge. Better performance was achieved in steel slag addition scenarios for both sludge hydrolysis and acidification. More solubilization of organic matters and much production of higher VFA (volatile fatty acid) in a shorter time can be achieved at pH10 when adjusted by steel slag. Higher enzyme activities were also observed in steel slag addition scenarios under the same pH conditions...
October 2016: Journal of Environmental Sciences (China)
Tingting Yue, Fahe Chai, Jingnan Hu, Ming Jia, Xiaofeng Bao, Zhenhua Li, Liqang He, Lei Zu
The natural gas vehicle market is rapidly developing throughout the world, and the majority of such vehicles operate on compressed natural gas (CNG). However, most studies on the emission characteristics of CNG vehicles rely on laboratory chassis dynamometer measurements, which do not accurately represent actual road driving conditions. To further investigate the emission characteristics of CNG vehicles, two CNG city buses and two CNG coaches were tested on public urban roads and highway sections. Our results show that when speeds of 0-10km/hr were increased to 10-20km/hr, the CO2, CO, nitrogen oxide (NOx), and total hydrocarbon (THC) emission factors decreased by (71...
October 2016: Journal of Environmental Sciences (China)
Guiqian Tang, Na Chao, Yuesi Wang, Jiashan Chen
Vehicular emissions in China in 2006 and 2010 were calculated at a high spatial resolution based on the data released by the National Bureau of Statistics, by taking the emission standards into consideration. China's vehicular emissions of carbon monoxide (CO), nitrogen oxides (NOx), volatile organic compounds (VOCs), ammonia (NH3), fine particulate matters (PM2.5), inhalable particulate matters (PM10), black carbon (BC), and organic carbon (OC) were 30,113.9, 4593.7, 6838.0, 20.9, 400.2, 430.5, 285.6, and 105...
October 2016: Journal of Environmental Sciences (China)
Zhi Tang, Xiaoping Chen, Daoyin Liu, Yaming Zhuang, Minghua Ye, Hongchan Sheng, Shaojuan Xu
Incineration of municipal solid waste (MSW) is a waste treatment method which can be sustainable in terms of waste volume reduction, as well as a source of renewable energy. During MSW combustion, increased formation of deposits on convection heating exchanger surfaces can pose severe operational problems, such as fouling, slagging and corrosion. These problems can cause lower heat transfer efficiency from the hot flue gas to the working fluid inside the tubes. A study was performed where experiments were carried out to examine the ash deposition characteristics in a full-scale MSW circulating fluidized bed (CFB) incinerator, using a newly designed deposit probe that was fitted with six thermocouples and four removable half rings...
October 2016: Journal of Environmental Sciences (China)
Qian Yin, Jinfeng Wang, Maogui Hu, Hoting Wong
When investigating the impact of air pollution on health, particulate matter less than 2.5 μm in aerodynamic diameter (PM2.5) is considered more harmful than particulates of other sizes. Therefore, studies of PM2.5 have attracted more attention. Beijing, the capital of China, is notorious for its serious air pollution problem, an issue which has been of great concern to the residents, government, and related institutes for decades. However, in China, significantly less time has been devoted to observing PM2...
October 2016: Journal of Environmental Sciences (China)
Min Zhou, Liping Qiao, Shuhui Zhu, Li Li, Shengrong Lou, Hongli Wang, Qian Wang, Shikang Tao, Cheng Huang, Changhong Chen
In this work, a one-year observation focusing on high time resolution characteristics of components in fine particles was conducted at an urban site in Shanghai. Contributions of different components on visibility impairment were also studied. Our research indicates that the major components of PM2.5 in Shanghai are water-soluble inorganic ions and carbonaceous aerosol, accounting for about 60% and 30% respectively. Higher concentrations of sulfate (SO4(2-)) and organic carbon (OC) in PM2.5 occurred in fall and summer, while higher concentrations of nitrate (NO3(-)) were observed in winter and spring...
October 2016: Journal of Environmental Sciences (China)
Lidia Pino, Cristina Italiano, Antonio Vita, Concetto Fabiano, Vincenzo Recupero
Sorbents for CO2 capture have been prepared by wet impregnation of a commercial active carbon (Ketjen-black, Akzo Nobel) with two CO2-philic compounds, polyethylenimine (PEI) and tetraethylenepentamine (TEPA), respectively. The effects of amine amount (from 10 to 70wt.%), CO2 concentration in the feed, sorption temperature and gas hourly space velocity on the CO2 capture performance have been investigated. The sorption capacity has been evaluated using the breakthrough method, with a fixed bed reactor equipped with on line gas chromatograph...
October 2016: Journal of Environmental Sciences (China)
Sangobtip Pongstabodee, Phuwadej Pornaroontham, Nuthapol Pintuyothin, Nuttapol Pootrakulchote, Nutthavich Thouchprasitchai
CO2 capture performance of bifunctional activated bleaching earth (ABE) was investigated at atmospheric pressure. The sorbents were characterized by means of X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Caron-Hydrogen-Nitrogen analysis (CHN), Fourier transform infrared (FT-IR) and thermal gravimetric analysis (TGA). The CO2 capacity was enhanced via basic-modification and monoethanolamine (MEA) loading of the ABE sorbent to obtain a bifunctional surface property. Here, basic-modified calcined ABE with a 30wt...
October 2016: Journal of Environmental Sciences (China)
José Marrugo-Negrete, José Durango-Hernández, José Pinedo-Hernández, Germán Enamorado-Montes, Sergi Díez
The use of metal-accumulating plants for the phytoremediation of contaminated soils is gaining more attention. Mercury (Hg)-contaminated soils from historical gold mines represent a potential risk to human health and the environment. Therefore, Jatropha curcas plant, that has shown its tolerance to these environments, is a species of particular interest to implement phytoremediation techniques in gold mining sites. In this work, the behavior of J. curcas was assessed in different hydroponic cultures fortified with Hg at concentrations of 5, 10, 20, 40, and 80μgHg/mL (T5, T10, T20, T40 and T80, respectively)...
October 2016: Journal of Environmental Sciences (China)
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