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	1. Shear strength and creep settlement properties of municipal solid waste at the Chong Qing Landfill, China
	ZHAO Yanru
	Environmental Science and Techology 21 May 2012
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	Abstract:This paper presents experimental results on geotechnical properties of municipal solid waste (MSW) at different biodegradation phases. The shear strength of fresh and landfilled municipal solid waste was determined by large direct shear tests (LDS). For fresh samples, the cohesion was increased from 0kPa to 19.89kPa, and the friction angle decreased from 27.84 to 14.41 as biodegradation degree increased from 0 to 63.83%.. For the triaxial tests under the consolidation drained (CD) condition, the shear strength of cohesion and friction angle for degraded samples presents a continuous increasing when the defined axial strain is increased from 5% to 20%, and the cohesion is vary from 35.90kPa to 66.42kPa, the drained friction angle ranged from 29 to37 . A narrow range for organic content and temperature that better for biodegradation and creep settlement were found in the creep tests, and it was ranged from 21.9% to 36.47%, 22 to 41 , respectively. The test results are useful for assessing the stability and creep settlement of landfills located in ChongQing city, in China.
	TO cite this article:ZHAO Yanru. Shear strength and creep settlement properties of municipal solid waste at the Chong Qing Landfill, China[OL].[21 May 2012] http://en.paper.edu.cn/en_releasepaper/content/4479297


	2. 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

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	3. A model of submerged membrane bioreactor removing organic substrate and its applications
	Feng Li,Feng Lijuan,Fan Huiju,Zhang Liqiu
	Environmental Science and Techology 12 March 2012
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	Abstract:In this paper, ROM model, a kinetics model on organic substrate removal, was established on the basis of material balance in submerged membrane bioreactor (SMBR). According to the model, the organic substrate removal rate is determined by not only the organic substrate concentrations in influent and effluent, hydraulic retention time (HRT), but also the organic substrate concentration removed by membrane module and sludge retention time (SRT). Meanwhile, SRT and the maximum value of mixed liquor volatile suspended solids (MLVSS) without discharging sludge can be determined as well as the concentration of MLVSS can be predicted in reactor. Brewery wastewater was chosen and examined to verify the model and the results showed that the experimental data were coincident with the calculating data.
	TO cite this article:Feng Li,Feng Lijuan,Fan Huiju, et al. A model of submerged membrane bioreactor removing organic substrate and its applications[OL].[12 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4470659


	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. Effects of 2,6-dinitrotoluene exposure on gene expression in the liver of common carp (Cyprinus carpio)
	Xu Jingbo,Gao Chao
	Environmental Science and Techology 02 January 2012
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	Abstract:In order to characterize the effect of 2, 6-dinitrotoluene (2, 6-DNT) on gene expression in the liver of common carp (Cyprinus carpio), fish was exposed via water for 15 days at concentrations of 0.195 and 1.95 mg/l 2,6-DNT in semi-static bioassay. Liver was selected as target tissue. Custom microarrays were constructed from cDNA libraries obtained with Suppression Subtractive Hybridization-Polymerase Chain Reaction (SSH-PCR) experiments. Microarray data revealed that the expression of several genes in the liver was influenced by 2,6-DNT exposure and real-time PCR was used to confirm these gene expression changes. The affected genes were mainly involved in energy metabolism, biotransformation and stress response. The pattern of EROD, GST，Na+/K+-ATPase, and GK enzyme activity in liver of common carp may have a close relationship with the gene expression and stress response to 2, 6-DNT. Furthermore, the RCF, HSI, and the available glycogen reserves of the exposed fish were significantly lower after 15 days of exposure than in the control fish. Through principal component analysis, effects by 2, 6-DNT-stress in each test group were distinguished. In this study, indications of a trade-off between the metabolic cost of toxicant exposure and processes vital to the survival of the organism were seen on the molecular level as well as on higher levels of biological organization.
	TO cite this article:Xu Jingbo,Gao Chao. Effects of 2,6-dinitrotoluene exposure on gene expression in the liver of common carp (Cyprinus carpio)[OL].[ 2 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4459282


	6. A Study on the Removal of Carbamazepine and Nitrobenzene in an Enhanced Membrane Bioreactor Process by Adding Powder Activated Carbon
	FAN Huiju,FENG Li,FENG Lijuan,ZHANG Liqiu
	Environmental Science and Techology 31 October 2011
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	Abstract:This paper investigated the removal of carbamazepine and nitrobenzene in an enhanced membrane bioreactor by adding powder activated carbon (PAC). The experimental results of two and half months' continuous operation showed that nitrobenzene can be removed completely no matter whether PAC was added or not. And the contributions of natural volatilization, aeration and activated sludge for the removal of nitrobenzene are 15.2%, 22.2%, and 62.6%, respectively. In comparison to nitrobenzene, carbamazepine's removal was of no avail after one month's operation without adding PAC, however, the removal efficiency of carbamazepine in the enhanced membrane bioreactor with PAC maintained at a stable level of 30%~40% after one month's operation. After PAC dosing, the amounts removed by adsorption and missing (probably biodegradation) both increased greatly, and the overall removal efficiency of carbamazepine raised 24.44 percents. These results indicate the possibility that PAC cannot only adsorb carbamazepine but also promote the biodegradation of carbamazepine. Furthermore, the sludge-water partition coefficient (Kp) and total adsorbed amounts of carbamazepine before and after PAC dosing are ascertained and compared.
	TO cite this article:FAN Huiju,FENG Li,FENG Lijuan, et al. A Study on the Removal of Carbamazepine and Nitrobenzene in an Enhanced Membrane Bioreactor Process by Adding Powder Activated Carbon[OL].[31 October 2011] http://en.paper.edu.cn/en_releasepaper/content/4447919


	7. Effect of carbon tetrachloride stress on antioxidative performance of wheat seedlings
	Tao Honglin,Shan Aiqin
	Environmental Science and Techology 10 July 2011
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	Abstract:To assess the CT toxicity to plants in soil, the antioxidative performance and the level of lipid peroxidation in wheat seedlings under CT stress were investigated by simulated experiments. The results indicated that: 1) The trend of activity of POD and SOD went to conformity, which were activated by CT ranging from 0.32 to 1.60 mgokg-1 and were inhibited by CT above 1.60 mgokg-1. 2) Under CT stress, the antioxidative performance of wheat seedlings was firstly activated within a short-term period, and then inhibited. 3) The lipid peroxidation of wheat seedlings wasn't obvious at CT concentration lower than 0.32 mgokg-1. But when CT concentration ranging from 0.32 to 1.60 mgokg-1, the MDA content increased obviously and the plasmalemma lipid could not be protected from peroxiding by activated POD and SOD. 4) At medium and late stage, the POD and SOD activity had a decreasing trend with increasing CT concentration, while the MDA content had significant positive correlation (with 99% confidence interval) with CT concentration.
	TO cite this article:Tao Honglin,Shan Aiqin. Effect of carbon tetrachloride stress on antioxidative performance of wheat seedlings[OL].[10 July 2011] http://en.paper.edu.cn/en_releasepaper/content/4435158


	8. Magnetically separable mesoporous silica nanocomposite and its application in Fenton catalysis
	XIA Min,LONG Mingce,CHEN Chen,CHEN Chao,CAI Weimin,ZHOU Baoxue
	Environmental Science and Techology 09 June 2011
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	Abstract:A novel magnetically separable core/shell type nanocomposite was synthesized in a facile way and characterized by XRD, UV-Vis, FT-IR, TEM, Nitrogen physisorption and Magnetite susceptibility measurements. In the synthesis procedure, the mesoporous silica shell was coating on the surface of magnetic core directly via a nano-assembling method. After calcination at high temperature (550 oC) for template removal, the spinel phase of maghemite core was retained without any transformation. The resulting material possessed a regularly hexagonal mesoporous structure with a high specific surface area (908.70 m2/g), which were favorable to further functional modification. Once incorporated with iron species by in situ synthesis, the nanocomposite could serve as a Fenton catalyst and was effective in phenol degradation at the given conditions (40 oC, pH=4). At the end of the reaction, it was easily collected by an external magnetic field and remained efficient in reuse.
	TO cite this article:XIA Min,LONG Mingce,CHEN Chen, et al. Magnetically separable mesoporous silica nanocomposite and its application in Fenton catalysis[OL].[ 9 June 2011] http://en.paper.edu.cn/en_releasepaper/content/4431181


	9. Transport and fate of bacteria in SAT system recharged with recycling water
	LIAN Jingjing,LUO Zejiao,JIN Menggui
	Environmental Science and Techology 13 April 2011
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	Abstract:Groundwater recharge with recycling water through soil aquifer treatment (SAT) system was applied in a lot of countries. In the process of recharging, the SAT system plays an important role in degrading organic pollutants, removing bacteria, N, P and so on. Even if the pathogen can be removed effectively, however, it doesn't mean that there is no possibility for the pathogen going through aerated zone and contaminating groundwater. This paper presents an experiment on the transport and fate of the bacteria (E.coli) in SAT system, a packed silt soil column, under saturated conditions. The simulated solution considered the basic control index and maximum limit value of groundwater recharge with urban recycling water. The concentration of bacteria was 105-CFU/L in the secondary discharge standard of wastewater treatment plant effluent. The experiment included two recharging stages (firstly for 12 days and secondly for 22 days) with 11 days drying between them The results showed that there was no detection of E.coli, and the electric conductivity, total nitrogen, IMn became the same finally between the influent and effluent. The concentration of E.coli in the solid phase decreased from up to down. Because of the growth and metabolism of bacteria, the soil column was blocked, which was resolved through drying. This simulation of recycling water recharge in lab could make people understand the transport and fate of contaminants better, and provided reference to practical projects.
	TO cite this article:LIAN Jingjing,LUO Zejiao,JIN Menggui. Transport and fate of bacteria in SAT system recharged with recycling water[OL].[13 April 2011] http://en.paper.edu.cn/en_releasepaper/content/4421889


	10. Effects of PCE pollution on soil enzyme activities
	Tao Honglin,Shan Aiqin
	Environmental Science and Techology 09 April 2011
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	Abstract:Simulated experiments were conducted to study the eco-toxicology effects of PCE pollutant on three main soil enzyme activities: protease, urease and catalase. The results showed that, increasing the initial PCE concentration resulted in higher inhibition effect on both protease and urease activities. The process was inhibited firstly and then recovered. PCE had a significant inhibition effect on soil protease and urease activites when its concentration ≥0.15, and ≥3.0mg/kg, respectively. The inhibition effect on soil protease and urease activites was indistinctive when PCE concentration <0.05, and <0.3mg/kg, respectively. On the first day, the inhibitory rates for protease activity were 28.31%~63.64%, and reached the maximum levels. The inhibition term of PCE on protease was about 9~15 days. It had a high significant inhibition effect (49.7%~71.09%) to urease activity on the first day when PCE concentration was above 0.15mg/kg. The inhibition term of PCE on urease was about 5~9 days. PCE had no obvious inhibition effect but a slight activation effect to catalase activity when its concentration was 0.05~30.0mg/kg. Within the experimental concentration range, microbes in contaminated soil had great resistance to peroxidation. Soil protease and urease were the most sensitive to PCE. The different effects of PCE on different enzymes would affect the properties and functions of the PCE contaminated soil.
	TO cite this article:Tao Honglin,Shan Aiqin. Effects of PCE pollution on soil enzyme activities[OL].[ 9 April 2011] http://en.paper.edu.cn/en_releasepaper/content/4421189

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