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	1. Comparison between continuous and intermittent ozonation for remediation of soils contaminated by polycyclic aromatic hydrocarbons
	Jiguo Wu,Jiang Yunxia,M. Prabhakar,Ye zhuoming,Yu Ruizhe,Zhou Hongwei
	Environmental Science and Techology 20 November 2014
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	Abstract:Continuous ozonation can inactivate indigenous microbes due to the disinfection capability of ozone, which may affect subsequent bioremediation of soils. This study investigated the efficiency of removing polycyclic aromatic hydrocarbons from soils using intermittent ozonation technique, where ozone was sparged through the soil column every alternate day, resulting in shorter ozonation time for each ozonation circulation than continuous ozonation. The results showed that 85% Phe, 94% Ant, 76% Flu, 87% Pyr, and 91% BaP were removed on 32 d in continuous ozonation treatment, while 90% Phe, 84% Ant, 78% Flu, 81% Pyr, and 96% BaP were removed on 32 d in intermittent ozonation treatment, indicating both intermittent and continuous ozonation can effectively remove polycyclic aromatic hydrocarbons from soils. Fluorescien diacetate hydrolysis results indicated that the total microbial activity of intermittent ozonation was significantly (p < 0.05) higher than that of continuous ozonation treatment at 8, 16, 24 and 32 d. The toxicity bioassay of soil extracts showed that the relative luminescence increased from 5 to 30% at 8 d, without significant (p > 0.05) increase at 32 d in continuous ozonation treatment, while it increased to 61% at 32 d in intermittent ozonation treatment, indicating intermittent ozonation was more effective than continuous ozonation for the detoxification of soils contaminated with polycyclic aromatic hydrocarbons. It suggested that the both treatments were equally effective at removing polycyclic aromatic hydrocarbons from soil, but intermittent ozonation was better than continuous ozonaiton for further detoxification and maintaining the total microbial activity of soil.
	TO cite this article:Jiguo Wu,Jiang Yunxia,M. Prabhakar, et al. Comparison between continuous and intermittent ozonation for remediation of soils contaminated by polycyclic aromatic hydrocarbons[J].


	2. Occurrence of phthalate esters in surface water and sediments from the Pearl River Delta, Southern China
	LI Ting,YIN Pinghe,ZHAO Ling
	Environmental Science and Techology 26 May 2014
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	Abstract:Rapid developments of the Pearl River Delta (PRD) region in recent decades have resulted in the increasingly serious environmental pollution in and around the region. The 6 priority phthalate esters (PAEs) were investigated in surface water and sediment from seven estuaries within the PRD for assessing the ecological risk to the aquatic environment. The concentration of Σ6PAEs in surface water ranged from 1.26 to 28.1 μg L-1, with a mean concentration of 16.5 μg L-1. It was from 1.56 to 31.2 μg g-1 dw in sediment, with a mean concentration of 9.72 μg g-1 dw. DMP, DBP and DEHP were found in all samples, and they were the predominant PAEs in the region. The distribution of PAEs showed that more serious pollution was found in Humen and the consumption of PAEs was increased in the most recent years in the PRD region. Risk quotient of detected PAEs to the relevant aquatic organisms of fish, daphnids and algae indicated the possible threat for the aquatic environment due to the presence of DBP and DEHP.
	TO cite this article:LI Ting,YIN Pinghe,ZHAO Ling. Occurrence of phthalate esters in surface water and sediments from the Pearl River Delta, Southern China[OL].[26 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4598552


	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. 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

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