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Chemically modified silica gel with 1-{4-[(2-hydroxy-benzylidene)amino]phenyl}ethanone:Synthesis, characterization and application as an efficient and reusable solid phase extractant for selective removal of Zn(Ⅱ) from mycorrhizal treated fly-ash samples

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Journal of environmental Sciences 2013年第6期25卷 1252-1261页

作者： R.K.Sharma Aditi Puri Anil Kumar Alok Adholeya 2 Green chemistry Network Centre Department of ChemistryUniversity of Delhi Biotechnology and Management of Bioresources Division The Energy and Resource Institute

1-{4-[（2-hydroxy-benzylidene）amino]phenyl}ethanone functionalized silica gel was synthesized and used as a highly efficient, selective and reusable solid phase extractant for separation and preconcentration of trace amount of Zn（II） from environmental matrices. The adsorbent was characterized by fourier transform infrared spectroscopy （FT-IR）, elemental analysis,~3C CPMAS NMR spectroscopy, scanning electron microscopy （SEM）, thermogravimetric analysis （TGA） and BET surface area analysis. The dependence of zinc extraction on various analytical parameters such as pH, type and amount of eluent, sample flow rate and interfering ions were investigated in detail. The material exhibited superior adsorption efficiency for Zn（II） with high metal loading capacity of 1.0 mmol/g under optimum conditions. After adsorption, the recovery （〉 98%） of metal ions was accomplished using 1.0 mol/L HNO3 as an eluent. The sorbent was also regenerated by microwave treatment in milder acidic environment （0.1 mol/L HNO3）. The lower detection limit and preconcentration factor of the present method were found out to be 0.04 ~tg/L and 312.5 respectively. The modified silica surface possessed excellent selectivity for the target analytes and the adsorption/desorption process remained effective for at least ten consecutive cycles. The optimized procedure was successfully implemented for the extraction of Zn（II） from mycorrhizal treated fly ash and pharmaceutical samples with reproducible results.

关键词： solid phase extraction silica gel preconcentration fly-ash zinc

Green Synthesis of Chemically Recyclable Polyesters via Dehydrogenative Copolymerization of Diols

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Chinese Journal of Polymer Science 2023年第8期41卷 1206-1214,I0006页

作者： Wei-Ming Xu Yuan-Dong Yu Meng-Xiang Ma Hui-Du Xu Rui-Qin Wang Yu-Peng Pan Ke-Qin Wu Wei-Ran Yang Chang-Guang Yao School of chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China School of resource&environment Nanchang UniversityNanchang 330031China Shenzhen Grubbs Institute and department of chemistry Southern University of Science and TechnologyShenzhen 518055China

Preparation of chemically recyclable polyesters by ring-opening polymerization(ROP)has made a considerable progress over the past few ***,this method involves cumbersome synthesis and minimal functional diversity of cyclic ***,it is of great significance to develop novel polymerization methods for direct polymerization of commercially available monomers to prepare recyclable polyesters with versatile *** present work,we report dehydrogenative copolymerization of commercialα,ω-diols to afford high molecular weight chemically recyclable aliphatic copolyesters(65.7 kg·mol^(-1))by using commercially available Milstein catalyst *** thermal properties of the obtained copolymers could be finely tuned by simply adjusting the feeding ratio of two *** incorporation of aliphatic or aromatic rings into polyester mainchain via copolymerization of 1,10-decanediol with 1,4-cyclohexanedimethanol and 1,4-benzenedimethanol could significantly improve the thermal properties of the resulting *** importantly,the obtained copolyesters were able to completely depolymerize back to original diols via hydrogenation by the same catalyst in solvent-free and mild conditions,thus offering a green and cost-effective route toward the preparation of widely used polyesters.

关键词： Chemically recyclable Dehydrogenative copolymerization Polyester Diol

Studies on ^(40)Ar/^(39)Ar thermochronology of strike-slip time of the Tan-Lu fault zone and their tectonic implications

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Science China Earth Sciences 2001年第11期44卷 1002-1009页

作者：朱光宋传中王道轩刘国生徐嘉伟 1. department of resource and environment Science Hefei University of Technology 230009 Hefei China

Samples of mylonite, ultramylonite and phyllonite were collected from 5 localities in the Anhui part of the Tan-Lu fault zone for 40Ar/39Ar chronological studies. Among them 4 samples from 3 localities on the eastern margin of the Dabie orogenic belt yielded 40Ar/39Ar plateau ages of 128 -132 Ma; and 2 samples from the western margin of the Zhangbalin uplift and eastern margin of the Bengbu uplift gave the same 40Ar/39Ar plateau ages of 120 Ma. Isochron analyses and other lines of evidence suggest that the data are reliable. The data are interpreted as cooling ages of sinistral strike-slip deformation of the Tan-Lu fault zone. The younger ages from the north might be related to slower strike-slip rising. These results indicate that the large-scale left-lateral displacement in the Tan-Lu fault zone took place in the Early Cretaceous, rather than in Late Triassic (Indosinian) as proposed by some geologists. Therefore, this fault zone is an intracontinental wrench fault rather than a transform fault or suture line developed during formation of the Dabie orogenic belt.

关键词： Tan-Lu fault zone mylonite 40Ar/39Ar age Early Cretaceous the Dabie-Jiaonan orogenic belt

Photooxidation of Furfural with Phthalocyanine-sensitized TiO_2 Particle Under Xenon Lamp

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Chemical Research in Chinese Universities 2007年第2期23卷 154-158页

作者： KANG Chun-li LU Yu GUO Ping ZHANG Fan YU Hong-bing LIN Xue-yu department of environment Science College of environment and resources Jilin University Changchun 130021 China department of Hydrology and Water resource College of Environment and Resources Jilin University Changchun 130021 China

Copper phthalocyanine was selected as the photosensitizer to sensitize TiO2 in this experiment with furfural as the target pollutant. The composite catalysts（TiO2/CuPC） obtained showed a great activity under a xenon lamp. By experiments, the optimal preparation conditions of the composite catalysts were set as follows ： the CuPC loading mass fraction was 1.5%, the mass fraction of acetylacetone was 0. 3% , and the stirring time was 10 h. UV-Vis diffuse reflectance spectra, XRD, and BET were used to characterize the properties of the composite catalysts, which showed that after loading CuPC on TiO2, the composite catalyst retained the same crystal structure as pure TiO2 and the wavelength range of its absorption spectrum was broadened to 600-700 nm while its surface area was smaller than that of the pure TiO2. Under the optimal conditions, 20 mg/L furfural solution was degraded by nearly 90% and TOC by about 70%. When the catalyst was reused 6 times, the activity of the catalyst was still retained by about 75%.

关键词： TiO2 CuPC Phthalocyanine-photosensitizer Furfural Photooxidation

The Activation of Fluorgypsum with Slag Activator and the Fluorine Solidification Mechanics

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 1023-1026页

作者：周旻张维昊 School of resource and environment Science Wuhan University

The mechanism of activator to fluorgypsum and the fluorine solidification were investigated by the performances of composite binding *** the setting time testing of fluorgypsum with NaOH,Na2SO4 and NaF,the least activator dosage were all 1%.And the cementitious material over 80% of fluorgypsum was processed to improve its quality with slag,fly ash and *** maximum compressive strength of composite binding material was over 12.90 MPa in 28 days,and the concentration of fluroride reduced 64.7% which compared with the pure fluorgypsum binding *** of X-ray diffraction and scanning electron microscopy images showed that ettringite crystals,dihydrate gypsum crystals and C-S-H gel were filled with each *** unreacted CaF2 crystals were embedded by a great deal of network and filamentous C-S-H *** was the main reason that the composite binding material strength improved,water resistance increased and leaching toxicity reduced.

关键词： fluorgypsum activation slag fluorine solidification

Enhanced Mn^(2+)solidification and NH_(4)^(+)-N removal from electrolytic manganese metal residue via surfactants

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Chinese Journal of Chemical Engineering 2022年第9期35卷 205-212页

作者： Jiancheng Shu Xiangfei Zeng Danyang Sun Yong Yang Zuohua Liu Mengjun Chen Daoyong Tan School of environment and resource Southwest University of Science and TechnologyMianyang 621010China School of chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China

Electrolytic manganese metal residue(EMMR)harmless treatment has always lacked a low-cost and quick processing *** this study,surfactants,namely tetradecyl trimethylammonium chloride(TTC),sodium dodecyl benzene sulfonate(SDBS),sodium lignin sulfonate(SLS),and octadecyl trimethylammonium chloride(OTC),were used in the solidification of Mn^(2+)and removal of NH_(4)^(+)-N from *** Mn^(2+)and NH_(4)^(+)-N concentrations under different reaction conditions,Mn^(2+)solidification and NH_(4)^(+)-N removal mechanisms,and leaching behavior were *** results revealed that the surfactants could enhance the Mn^(2+)solidification and NH_(4)^(+)-N removal from EMMR,and the order of enhancement was as follows:TTC>SDBS>OTC>*** NH_(4)^(+)-N and Mn^(2+)concentrations were 12.3 and 0.05 mg·L^(-1)with the use of 60.0 mg·kg^(-1)TTC under optimum conditions(solid–liquid ratio of 1.5:1,EMMR to BRM mass ratio of 100:8,temperature of 20℃,and reaction duration of 12 h),which met the integrated wastewater discharge standard(GB8978-1996).Mn^(2+)was mainly solidified as Mn(OH)_(2),MnOOH and MnSiO_(3),and NH_(4)^(+)-N in EMMR was mostly removed in the form of *** results of this study could provide a new idea for cost-effective EMMR harmless treatment.

关键词： Electrolytic manganese metal residue Mn^(2+)solidification NH_(4)^(+)-N removal Surfactants

t-GIS AND environmentAL DYNAMIC MODELS

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Geo-Spatial Information Science 2000年第3期3卷 34-41页

作者： WU HongWU Hong,Ph.D.,Associate Researcher,department of resource and environment,Guilin Institute of Technology,12 Jiangan Road,Guilin 541004,China department of resource and environment Guilin Instilute of Technolog

Temporal geographic information system(t_GIS) is a kind of computer information system that can display,process and analyze the micro_format distribution of temporal_spatial information of real *** includes both spatial geographic information and temporal information,and can analyze both the static geographic information and the dynamic geographic information. Three models based on t_GIS for environment dynamics,namely,the mechanism method,the experience method and the mixed method are given. t_GIS based on the environment dynamic model has more new functions than traditional GIS,such as fast I/O,inquiry,static/dynamic display and visible analysis of spatial and temporal sequence information,especially it can display the image of the evolution in the past,current and future environment through the extrapolation method within its defining *** velocity for analogue display can be accelerated by setting up time_varying_area_function for position and attribute. Dynamic environmental information analysis systems based on t_GIS are applicable to almost all the fields related to management,display and analysis of local environmental dynamic *** this reason,some considerations to construct distinct information systems have been enumerated in this paper,such as,the analysis information system for terrain evolution,the analysis information system for the condition of water and fertilizer of farmland,analysis and the evaluation information system for ecological environment,and the analysis information system for distribution changes of population of China,etc.

关键词： temporal geographic information system environment dynamic model

Assessment of Habitat Suitability in the Upper Reaches of the Min River in China

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Journal of Mountain Science 2015年第3期12卷 737-746页

作者： GUO Ya-lin WANG Qing YAN Wei-po ZHOU Qin SHI Min-qiu School of environment and resource Southwest University of Science and Technology

HabRat richness influences and even determines biological diversity. Plant habitat suitability assessment can provide technical guidance and information support for ecological restoration. Thirteen factors in three categories of terrain, meteorology and soil were chosen to build a habitat suitability assessment index framework in the Upper Reaches of the Min River, based on the local natural environment and the actual influencing factors of vegetative growth. Combined with the Analytic Hierarchy Process （AHP） and entropy method, which were used to calculate weights of indexes, habitat suitability was studied by using a multi-objective linear weighting model and geographic information systems （GIS） spatial analysis techniques. The assessment results are as follows： Altitude, soil stability, aspect and slope have more important effects on plant habitat suitability in the Upper Reaches of the Min River, and their weights are o.311, 0.260, o.198 and o.125, respectively. Suitable and sub-suitable habitats cover 4431.8o km2 and 6171.12 km2, respectively; most of which are distributed along both sides of rivers and have higher suitability. Unsuitable habitats cover the largest area （6679.76 km2）, accounting for 29.83% of the whole area; and the worst unsuitable habitats are 5107.23 km2 （22.81%）; they account for more than half of the study area. These results indicate that the plant habitat in the Upper Reaches of the Min River is poor and ecological restoration is both urgent and difficult. Therefore, based on the principle of taking measures suitable to the habitat in ecological restoration projects, ecological and engineering measures should be combined to have better effects, while increasing the strength of ecological protection.

关键词： Habitat suitability Analytic hierarchyprocess (AHP) Entropy method Spatial analysis Min River China

Compositional and Structural Difference of Fulvic Acid from Black Soil Applied with Different Organic Materials: Assessment After Three Years

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Journal of Integrative Agriculture 2013年第10期12卷 1865-1871页

作者： LI Jian-ming WU Jing-gui College of resource and environment Science Jilin Agricultural University

Knowledge of different effects of various organic materials on soil humic substance is important for both environmental safety and sustainable agriculture.A pot experiment was conducted at Jilin Agricultural University,Jilin Province in northeast China to discover the influence of herb residue,animal excrement,woody residue,animal remnant on fulvic acid（FA） composition and structure using differential thermal analysis-thermogravimetric（DTA-TG）,fourier transform infrared spectroscopy（FTIR） and elemental ***-TG showed the range of peak temperature in the first exothermic reaction increased following the trend： CK〉herb residue〉animal excrement〉woody residue=animal remnant,and the most weight loss was observed in animal ***,the second exothermic reaction of CK-and animal excrement-FA was presented as double peaks,the order of weight loss in that area was animal remnant〉CK〉woody residue〉animal excrement〉herb *** to FTIR,herb residue displayed higher adsorption intensity at 2 950,1 420,1 240 and 1 030 cm-1,animal excrement was in *** the same time,herb residue-and animal excrement-FA had an absorption peak at 1 720 cm-1,while other organic materials didn＇t have this *** elemental analysis showed,FA isolated from various treatments was significantly *** was clearly shown from our results that FA composition and structure in amended soils may be affected in different ways and at various extents on dependence of the nature and origin of amendment.

关键词： different organic materials fulvic acid DTA-TG FTIR elemental analysis