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Journal of wuhan university of Technology(Materials Science) 2008年第3期23卷 372-375页

作者：王湖坤 school of chemistry and {2. engineering Hubei Normal University school of Resources and environmental {2. Wuhan University of TechnologyWuhan 430070China

The preparation of granulated adsorption material of water-quenched slag/rectorite composite and the treatment of Cu （ Ⅱ ）-containing copper smelter wastewater with the adsorption material were studied. The experimental results showed that under the conditions with the mass ratio of water-quenched slag to rectorite of 1：1, 10% additive of industrial starch （IS）, and 50% water, and a calcination temperature of 400 ℃, the granulated adsorption material prepared had a density of 1.06 kg/m^3, a porosity of 62.2.%, water absorption rate of 58.82., and compressive strength of 2.2. MPa. The efficiency of wastewater treatment was the best, whereas the rate of spallation loss was low. Under the conditions of natural pH, with the addition of the granulated adsorption material of 0.05 g/mL, a reaction time of 40 minutes, and temperature of 2. ℃, the efficiency of the granulated adsorption material for the removal of Cu （ Ⅱ ） ions from the copper smelter wastewater attained 98.2., and the quality indexes of the wastewater after treatment conformed with the first level of integrated wastewater discharge standard （GB8978-1996）. The reclamation of the used granulated adsorption material was carried out by de-sorption of the Cu （ Ⅱ） ions from the surface with 1 mol/L sodium chloride solution. The de-sorption rate was 96.4%, and the adsorption material can be reused many times to treat copper smelter wastewater.

关键词： water-quenched slag rectorite granulation reclamation copper smelter wastewater

AFM study on the adsorption and aggregation behavior of dissolved humic substances on mica

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Science china chemistry 2006年第3期49卷 256-266页

作者： GE Xiaopeng1, ZHOU Yanmei2. Lü Chunhua1 & TANG Hongxiao1 1. State Key Laboratory of environmental Aquatic chemistry, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, china 2. school of Civil engineering & Architecture, Beijing Jiaotong university, Beijing 100044, china State Key Laboratory of environmental Aquatic chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing China school of Civil engineering & Architecture Beijing Jiaotong University Beijing China

Humic substances constitute the major organic fractions of soils, sediments and natural waters, and play a dominant role in the binding, mobilization, transport and ultimate fate of organic contaminants in subsurface systems. In this paper, two humic acid samples, Guanting and Tianjin, with different origin and chemical compositions have been investigated with AFM imaging for their adsorption and aggregation behaviors on mica. While the Tianjin humic sample is found to form small spheres with 2.0 to 330 nm in diameter at lower concentrations, irregular loop-chain assemblies of hundreds of nanometer in diameter with the chain width of about 40 nm are dominant for the Guanting humic sample, which may attribute to the more polar aliphatic fractions in the chemical composition in the latter. The heterogeneous and polydisperse nature of humic substances with multiple structural features, such as sponge-like structures, perforated sheets, aggregate of spheres, branches and chain-like assemblies etc., is apparent at higher concentrations for both humic samples, showing morphologically new evidence for the dominant view of the humic dual-mode sorption model. With naphthalene introduced, the assemblies of Guanting humic substances clearly become more compact with significantly narrowed branches and less porous the perforated sheet-like structures. It is indica- tive of that smaller nanometer scale rings present along the perforated assemblies could potentially represent hydrophobic domains, which may facilitate the adsorption and aggregation of naphthalene onto the natural particle surfaces and therefore lead to an important role of dissolved humic sub- stances in the sorption of environmental pollutants.

关键词： atomic force microscopy (AFM) dissolved humic substances morphology aggregation adsorption

Separation of Red (Y_2._3: Eu^(3+)), Blue (Sr,Ca,Ba)_(10)(PO_4)_6Cl_2. Eu^(2.) and Green (LaPO_4:Tb^(3+),Ce^(3+)) Rare Earth Phosphors by Liquid/Liquid Extraction

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Journal of wuhan university of Technology(Materials Science) 2009年第3期24卷 418-423页

作者：梅光军 school of Resource and environmental {2. Wuhan University of Technology

A novel process for separation of red （Y2.3： Eu^3＋）, blue （Sr, Ca, Ba）10（PO4）6Cl2. Eu^2. and green （LaPO4： Tb^3＋, Ce^3＋） fine tricolor phosphor powders was established. First, the green phosphor was extracted and separated from three phosphor mixtures in heptane/DMF（N, N-Dimethylformamide） system using stearylamine or laurylamine （DDA） as the cationic surfactant. Then, after being treated with 99.5% ethanol, the blue and red phosphors could be separated in Heptane/DMF system in presence of 1-octanesulfonic acid sodium salt as the anionic surfactant. Satisfactory separation results have been achieved through two steps extractions with their artificial mixtures. The grades and recovery of separated products reached respectively as follows： red product was 95.3% and 90.9%, blue product was 90.0% and 95.2., and green product was 92.2. and 91.8%.

关键词： rare earth phosphor liquid-liquid extraction separation

Separation of Red (Y_2._3:Eu^(3+)), Blue (BaMgAl_(10)O_(17):Eu^(2.)) and Green (CeMgAl_(10)O_(17):Tb^3) Rare Earth Phosphors by Liquid/Liquid Extraction

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Journal of wuhan university of Technology(Materials Science) 2009年第4期24卷 603-607页

作者：梅光军 school of Resource and environmental {2. Wuhan University of Technology

A novel process for separation of red （Y2.3：Eu^3＋）, blue（BaMgAl10O17：Eu^2.） and green （CeMgAl10O17：Tb^3） rare earth fluorescent powders was proposed. At first, the blue powder can be extracted selectively from an aqueous solution using a chelating collector 2.thenoyltrifluoroacetone （TTA） dissolved in heptane at alkaline pH condition, then, chloroform was used for extracting the green powder into organic phase. The red phosphor remains in aqueous phase with potassium sodium tartrate depressant （PST）. Therefore, three phosphors can be separated successfully from their artificial mixtures by liquid/liquid extraction, and grades and recovery of separated products reach respectively as follows： red is 96.9% and 95.2., blue is 82.7% and 98.8%, green is 94.6% and 82.6%.

关键词： rare earth phosphor solid-solid separation liquid/liquid extraction

Degradation of anthracene, pyrene and benzo[a]-anthracene in aqueous solution by chlorine dioxide

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Science china chemistry 2006年第6期49卷 565-572页

作者： LIU Jinquan1, HUANG Junli1, SU Liqiang2. CAO Xiangyu1 & JI Ying1 1. school of Municipal and environmental {2., Harbin Institute of Technology, Harbin 150090, china 2. school of chemistry and Chemical {2., Qiqihar university, Qiqihar 161006, china school of Municipal and environmental {2. Harbin Institute of Technology Harbin China school of chemistry and Chemical {2. Qiqihar University Qiqihar China

Polycyclic aromatic hydrocarbons (PAHs) constitute an important group of micropollutants, which are known to be mutagenic, carcinogenic and/or co-carcinogenic and relatively persistent in the environment. The effects of chlorine dioxide (ClO2. on the degradation of anthracene (ANTH), pyrene (PYR) and benzo[a]anthracene (BaA) in aqueous solution were investigated using high performance liquid chromatography (HPLC). In preliminary experiments, it was observed that ClO2.could remove these three PAHs effectively within a short time. Several factors including reaction time, the concentration of ClO2.and pH of the reaction mixture influencing the degradation ratio of PAHs have been studied by batch experiments. The results showed that the degradation ratio of PAHs was affected by reaction time and the concentration of ClO2.instead of pH. The degradation ratio of ANTH, PYR and BaA could reach their maximum as approximately 99.0%, 67.5% and 89.5%, respectively, under the condition as follows: reaction time 30, 60 and 12. min, the concentration of ClO2.0.1, 0.4 and 0.5 mmol·L-1, and pH 7.2. ANTH was selected as the representative to study the reaction mechanism with ClO2. The oxidation products formed in the reaction of ANTH with ClO2.were tentatively identified by gas chromatography-mass spectrometry (GC-MS), and the results showed that the main product was 9, 10-anthraquinone, which could be biodegraded more easily and quickly than ANTH. Through analyzing the reaction properties of ANTH and ClO2. the possible pathway for the ANTH-ClO2.reaction was proposed based on the theory of single electron transfer (SET).

关键词： chlorine dioxide, anthracene, pyrene, benzo[a]anthracene, degradation, reaction mechanism.

Status of study on biological and toxicological effects of nanoscale materials

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Science china chemistry 2005年第5期48卷 385-394页

作者： WANG Bing1, FENG Weiyue1, ZHAO Yuliang1, XING Gengmei1, CHAI Zhifang1, WANG Haifang2.& JIA Guang3 1. Laboratory for Bio-environmental Health Sciences of Nanoscale Materials (Nanosafety Lab), Institute of High Energy Physics, Chi-nese Academy of Sciences, Beijing 100049, china 2. College of {2. and Molecular engineering, Peking university, Beijing 100871, china 3. Department of Occupational and environmental Health Sciences, school of Public Health, Peking university, Beijing 100083, china Laboratory for Bio-environmental Health Sciences of Nanoscale Materials (Nanosafety Lab) Institute of High Energy Physics Chinese Academy of Sciences Beijing China College of chemistry and Molecular engineering Peking University Beijing China Department of Occupational and environmental Health Sciences School of Public Health Peking University Beijing China

Because the physical and chemical properties of nanosized materials mostly differ from the existing microsized materials, their potential impacts on human health and the envi-ronment will be topics under the serious discussions in press and in a number of international scientific journals. We analyze and summarize the existing data of the experimental study on the biological activities and adverse effects of nanoscale materials/particles including single wall carbon nanotubes, multi wall carbon nanotubes, titanium oxide and iron powders. Though some biological behaviors of nanoscale materials observed cannot be understood on the basis of the current knowledge, as the existing data are mostly preliminary, it is too early to make some ex-clusive conclusions on biological activities (or the toxicity) of any of nanoscale materials. The experimental techniques, the current topics, and the future research directions for this new re-search field are also discussed.

关键词： nanomaterials, single wall carbon nanotubes, multi wall carbon nanotubes, titanium oxide and iron, biological activity and toxicological effect.

Characterzation and separation of Al_(13) species using gel-filtration chromatography

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Science china chemistry 2006年第4期49卷 326-331页

作者： CHU Yongbao1,2. GAO Baoyu1, YUE Qinyan1, WANG Yan1 & WANG Shuguang1 1. school of environmental Science and {2., Shandong university, Jinan 2.0100, china 2. College of Material and Environment, Qingdao university of Science and Technology, Qingdao 2.6042. china school of environmental Science and {2. Shandong University Jinan China College of Material and Environment Qingdao University of Science and Technology Qingdao China

A polyaluminum chloride (PAC) sample was prepared using a slow alkalinetitration method. The Bio-Gel P-100 gel column chromatographic technique was used to separate andcharacterize the various forms of aluminum present in the prepared PAC solution. The effluents froma gel column were monitored using online chemical method: AI-Ferron timed complexationspectropho-tometry and by ^(2.)Al nuclear magnetic resonance (NMR) spectroscopy. Effects ofdifferent experimental conditions such as eluent flow rate, ionic strength and pH on separation ofAl_(13) were investigated. Experimental results indicated that molecule size exclusion was not theonly parameter affecting the column chromatographic separation efficiency of Al_(13) but moleculecharge as well. Reducing the eluent flow rate, increasing the ionic strength and suitable pHresulted in increase in the separation efficiency. Experimental results clearly indicated that byvarying the experimental conditions, it is possible to produce pure Al_(13) species using a gelcolumn chromatographic technique.

关键词： Al13 species, column chromatography, polyaluminum chloride (PAC), separation and purification.

Formation of the Inclusion Complex of Orange Ⅱ with β-Cyclodextrin and Its Photostability

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wuhan university Journal of Natural Sciences 2003年第4期 1147-1152页

作者： Lu Ping 1,2., Liu Bin 1,3 , Zhang Zhe 1 , Wu Feng 1 , Deng Nan-sheng 1 1. College of Resource and environmental Science, wuhan {2., wuhan 430072. Hubei, china 2. school of chemistry and environmental engineering, jianghan university , wuhan 430056, Hubei, china 3. Department of environmental and Chemical engineering, Huangshi Polytechnic College, Huangshi 435003, Hubei, china

Inclusion complex of Orange II with β-Cyclodextrin （β-CD） and the anti-photolysis effect under UV-light were investigated. The molar ratio of inclusion complex of β-Cyclodextrin and Orange Ⅱ is 1∶1. The formation constant K=1.2.6×10 3 L/mol was determined by the UV and Fluorescence spectra respectively, which was quite in accordance with the calculation with a modified Benesi-Hildbrand equation. The inclusion complex was characterized by the IR spectra and the molar ratio of inclusion complex is 1∶1 too. The formation constant K=1.2.6×10 3 L/mol was determined by 1 H NMR analysis and was nearly the same by UV and fluorescence spectra. The photocatalytic decolorization rate of Orange Ⅱ solutions containing β-CD and TiO_ 2.was smaller by 51.9% than that of the Orange Ⅱ solutions only containing TiO_ 2., while in the case of direct photolysis of Orange Ⅱ solutions, β-CD can lower the photolysis rate by 48.1% under UV-light. This result indicates β-CD can inhibit the photolysis and photocatalytic decolorization of Orange Ⅱ under UV-light. The β-CD inclusion complex was found to be persistent to UV-light photolysis.

关键词： β-Cyclodextrin Orange Ⅱ inclusion complex photostability

Preparation and characterization of nitrogen-doped titanium dioxides

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Science china chemistry 2007年第2期50卷 212-216页

作者： ZHU GuoPing1 & ZHOU KangGen2.1 environmental Science Research & Design Institute of Zhejiang Province,Hangzhou 310007,china 2.Department of environmental engineering,school of Metallurgical Science and engineering,Central South university,Changsha 410083,china environmental Science Research & Design Institute of Zhejiang Province Hangzhou China Department of environmental engineering School of Metallurgical Science and Engineering Central South University Changsha China

A type of high visible-light active titanium oxinitride(TiO2.xNx) powder was prepared by a simple proc-ess:the calcination of the hydrated titanium dioxide at the atmosphere of ammonia-argon using a tu-bular electric furnace at high temperatures. The hydrated titanium dioxide was synthesized as the precursor of TiO2.xNx using titanic acid as raw material,which came from sulfate technique of produc-ing titanium white. The effects of temperature and reaction time on the nitrogen content,grain size and crystal structure were studied. The visible-light activity and photocatalysis capability of the powder were also investigated.

关键词： nitrogen-doped titanium dioxides visible-light activity photocatalysis titanium oxinitride

Temperature-controlled ionic liquid dispersive liquid phase microextraction combined with ultra-high-pressure liquid chromatography for the rapid determination of triclosan,triclocarban and methyl-triclosan in aqueous samples

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Science china chemistry 2010年第12期53卷 2600-2607页

作者： GUO JieHong 1,2.LI XingHong 2.CAO XueLi 1,QU Lei 2.3,HOU DeKun 2.& XU XiaoBai 2.1 school of Chemical and environmental {2.,Beijing Technology and Business university,Beijing 100048,china 2.State Key Laboratory of environmental chemistry and Eco-toxicology Research Center of Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 100085,china 3 Zhengzhou university,Zhengzhou 450001,china school of Chemical and environmental {2. Beijing Technology and Business University Beijing China State Key Laboratory of environmental chemistry and Eco-toxicology Research Center of Eco-environmental Sciences Chinese Academy of Sciences Beijing China Zhengzhou university Zhengzhou China

As extraction solvents,ionic liquids have green *** this study,an environmentally benign analytical method termed temperature-controlled ionic liquid dispersive liquid phase microextraction (TIL-DLME) combined with ultra-highpressure liquid chromatography (UHPLC)-tunable ultraviolet detection (TUV) was developed for the pre-concentration and determination of triclosan (TCS),triclocarban (TCC) and methyl-triclosan (M-TCS) in water *** parameters that may affect extraction efficiencies were examined and optimized,including the types and amount of ionic liquids,volume of the diluent,heating temperature,cooling time,salt effect and pH *** the optimum conditions,linearity of the method was observed in the ranges of 0.0100-100 μgL-1 for TCS and M-TCS,and 0.00500-50.0 μgL-1 for TCC with correlation coefficients (r2. > *** limits of detection (LODs) ranged from 1.15 to 5.33 *** in domestic water and TCC in reclaimed water were detected at the concentrations of 1.01 and 0.12. μgL-1,*** spiked recoveries of the three target compounds in reclaimed water,irrigating water,waste water and domestic water samples were obtained in the ranges of 68.4%-71.9%,61.6%-87.8%,58.9%-74.9% and 64.9%-92.4%,*** with the previous dispersive liquid-liquid microextraction method (DLLME) about the determination of TCS,TCC and M-TCS,this method is not only more environmentally friendly but also more sensitive.

关键词： ionic liquid temperature-controlled ionic liquid dispersive liquid phase microextraction UHPLC aqueous samples