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	1. The influence of nonstoichiometry on LaMnO3 perovskite for catalytic NO oxidation
	CHEN Jiahao,SHEN Meiqing,WANG Xinquan,WANG Jun
	Environmental Science and Techology 11 December 2012
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	Abstract:A series of structural modified LaxMnO3 (x = 0.9, 0.95, 1, 1.05, 1.11) perovskites used for NO oxidation was synthesized by a sol-gel method and characterized by XRD, BET, XPS, EPR and H2-TPR. La0.9MnO3 sample exhibits superior activity, and a 50% NO conversion at 250 C is obtained. XPS and EPR results reveal a higher Mn4+/Mn3+ ratio in Mn-rich samples, which induce more active oxygen bonding to Mn4+ due to the need for balancing the chemical states and stabilizing the structure. Easily regenerated oxygen associated with Mn4+ catalyzes the low-temperature NO oxidation. The constant activation energy (44.8 kJ/mol) obtained in the kinetics tests indicates the same mechanism of NO oxidation operated on all the samples.
	TO cite this article:CHEN Jiahao,SHEN Meiqing,WANG Xinquan, et al. The influence of nonstoichiometry on LaMnO3 perovskite for catalytic NO oxidation[OL].[11 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4500817


	2. Preparation of polyethylenimine-functionalized graphene oxide composite and its application in electrochemical ammonia sensors
	SONG Min,XU Juan
	Environmental Science and Techology 23 November 2012
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	Abstract:In this study, branched polyethyleneimine (PEI) was covalently linked to carboxylic acid functionalized graphene (GO-COOH) to form the GO-COOH/PEI composites. Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectra and thermogravimetric analysis (TG) were used to characterize the obtained composites. Electrochemical measurements indicated that the modification of the composites on electrode could efficiently enhance the voltammetric response, suggesting the potential application for making electrochemical sensors. Moreover, our results also indicated that the electrocatalytic oxidation of ammonia could be observed on the GO-COOH/PEI composites modified glassy carbon electrode. Consequently, our observations demonstrated that GO-COOH/PEI composites were excellent materials for electrochemical sensing.
	TO cite this article:SONG Min,XU Juan. Preparation of polyethylenimine-functionalized graphene oxide composite and its application in electrochemical ammonia sensors[J].


	3. A molecularly imprinted polymer for determining tributyltinchloride by LC-MS/MS
	ZHU Shanshan ,Futao HU,Ting YANG,Ning GAN
	Environmental Science and Techology 28 March 2012
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	Abstract:There is a high interest in speciation of tributyltinchloride(TBT) in environment samples, such as seawater, due to the influence in the transmission of the contamination in the trophic chain. The environmental impact of organotin compounds has given particulate importance to analytical studies. This paper reports that applying a molecular imprinting technolgy with liquid chromatography-tandem mass spectrometry (LC-MS/MS) to this field. The imprinted polymer has been synthesised by the non-covalent free redical approach using acrylamide(AM) as monomer in the presence of TBT as template molecule in acetonitrile solvent. The ability of the polymer synthesised to retain and distinguish TBT has been evaluated and optimized. The analytical characteristics included linearity（10-100000μgL-1）, a pre-concentration factor of 100, and detection limit of 0.01 μgl-1.
	TO cite this article:ZHU Shanshan ,Futao HU,Ting YANG, et al. A molecularly imprinted polymer for determining tributyltinchloride by LC-MS/MS[OL].[28 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4472600


	4. Study on the interaction locations between Humic acid and Pyrene
	MA Xingke,PENG Jinghe,ZHU Yaxian,WU Fang,ZHANG Yong
	Environmental Science and Techology 05 February 2012
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	Abstract:IFluorescence quenching method was employed to determine the binding constant (Koc) of Humic acid (HA) - Pyrene (Py). The effects of pH value, ionic strength and heavy metal (HM) ions on the Koc were investigated and used to discuss the interaction mechanism between HA and Py. A fluorescent probe method was established and firstly applied to study the interaction between HA and Py by investigating the variation of I1/I3 with the chemical conditions of HA solution. Experimental results indicated that I1/I3 values showed an opposite trend compared to that of Koc, but an identical explanation on the interaction between HA and Py was obtained. The effects of HM ions on the interaction between HA and Py were dependent on the binding sites of HA and HM ions which was located at the carboxyl and hydroxyl. 1H NMR was applied to search for the binding site between HA and Py which was located at aliphatic chain of the HA.n this paper.
	TO cite this article:MA Xingke,PENG Jinghe,ZHU Yaxian, et al. Study on the interaction locations between Humic acid and Pyrene[OL].[ 5 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4465128


	5. Fluorescence-enhanced based on multi-walled nanotubes and cupral system for copper（Ⅱ）determination
	Yang Yanlin
	Environmental Science and Techology 21 September 2009
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	Abstract:A novel, sensitive and convenient determine technology based on the enhancing of the fluorescence intensity of multi-walled nanotubes (MWNTs(by copper(Ⅱ)and cupral complex was proposed.The MWNTs had the fluorescence at 367nm when excited at 230nm, when Cu2+ was added into the MWNTs and cupral system, it induces the enhancing of fluorescence emission at 367nm. Under optimum condition, the fluorescence intensity versus Cu2+ concentration gave a linear response with an excellent 0.99921 correlation coefficient, the linearity range of the calibration curve was 2.67×10-6 molL-1to 5.3×10-6 molL-1, the limit of detection(3σ/k) is 4.09×10-7molL-1, the concentrations of Cu2+ with the synthetic samples were determined by proposed method with a satifactory result.
	TO cite this article:Yang Yanlin. Fluorescence-enhanced based on multi-walled nanotubes and cupral system for copper（Ⅱ）determination[OL].[21 September 2009] http://en.paper.edu.cn/en_releasepaper/content/35324


	6. Release Laws of Heavy Metals in Leaching Gangue Dump
	Jia Hong-xia,Xiao Xin
	Environmental Science and Techology 26 May 2009
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	Abstract:Coal gangue is one of the largest industrial waste residue in China, which not only takes up much of the farmland , but also releases a large number of harmful elements, such as the heavy metals, with the effect of weathering, decomposition and leaching, causing serious water, air and soil pollution. We took the gangue of Jining coal mine Ⅲ as the object, carrying out the leaching experiment with the simulated acid water of the study zone，That was directing significance for prevention and cure job of environmental pollution. The results showed that: (1) The contents of Cr and Cd in the gangue were in excess of the Third Class of Environmental Quality Standars for Soil. The largest concentrations of Cr, Pb and Cd in the filtrate water were in excess of the Third Class of Environmental Quality Standards for Surface Water (2) For the largest release , the number of metal Cr was largest, followed by Zn, Pb, Cu, a relatively small amount of Cd and Mn, similar to the old gangue and the new gangue. For the largest release rate, the number of Cd was largest in the new gangue, secondly for Cr, next smaller for Pb, Zn and Cu and Mn almost zero; In the old gangue, Cr appeared first, followed by Pb, Zn and Cu, Cd was relatively smaller and practically nil of Mn.
	TO cite this article:Jia Hong-xia,Xiao Xin. Release Laws of Heavy Metals in Leaching Gangue Dump[OL].[26 May 2009] http://en.paper.edu.cn/en_releasepaper/content/32555


	7. Photodegradation of natural estrogen by heterogeneous Fenton reaction
	zhao yaping
	Environmental Science and Techology 25 February 2009
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	Abstract:The photodegradation of natural estrogen 17β-estradiol (E2) by novel heterogenerous Fenton catalyst was investigated as a function of E2 concentrations, organic co-solvents, co-existing estrogens and pH. The degradation kinetic was fitted to Langmuir-Hinshelwood model. The removal kinetics of E2 were initiated by a rapid decay and then followed by a much slower one in acetonitrile-water solutions, while in methanol-water solutions it followed the first-kinetic model for the diffusion-controlled of hydroxyl radicals and competition between E2 and co-solvents. The lower level of co-existing estrogens didn’t significantly influence the oxidation efficiency of E2. The degradation rates of E2 depended on E2 concentrations, composition of co-solvents and pH. Thus this novel Fenton catalyst can efficiently eliminate E2 through heterogeneous Fenton mechanism.
	TO cite this article:zhao yaping. Photodegradation of natural estrogen by heterogeneous Fenton reaction[OL].[25 February 2009] http://en.paper.edu.cn/en_releasepaper/content/29640

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