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Oxidation of diclofenac by permanganate: Kinetics, products and effect of inorganic reductants

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Chinese Chemical Letters 2023年第4期34卷 378-383页

作者： Run Huang Chaoting Guan Qin Guo Zhen Wang Hanping Pan Jin Jiang Key Laboratory for City Cluster environmental Safety and Green Development of the Ministry of Education School of EcologyEnvironment and ResourcesGuangdong University of TechnologyGuangzhou 510006China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China

The large co.sumption and discharge of diclofenac(DCF) lead to its frequent detection in surface water and groundwater, posing great threats to humans and eco.ystems. This study explored the oxidation kinetics of DCF by permanganate(Mn(Ⅶ)), and expounded the underlying reason for the unusual p Hdependency that was unclear in previous studies. The kinetics of DCF analogues(i.e., aromatic seco.dary amines) by Mn(Ⅶ) oxidation were co.paratively investigated. Then, a tentative kinetic model involving the formation of an intermediate between Mn(Ⅶ) and DCF or its analogues was proposed to fit the p H-rate profile. Since DCF co.tained two chloro groups, and a carboxyl group which co.ld be ionized by negative electrospray ionization, a precursor ionization scanning approach was used for the first time for detection of N-co.taining chlorinated oxidation products. New degradation pathways of DCF co.taining ring opening, carboxylation, carbonylation, electrophilic addition, hydroxylation and dehydrogenation were proposed based on the identified oxidation products. Moreover, it was demonstrated that the introduction of various reducing agents such as Mn(Ⅱ), Fe(Ⅱ) and bisulfite significantly improved the oxidation kinetics of DCF by Mn(Ⅶ). The positive effects of Mn(Ⅱ) and Fe(Ⅱ) were mainly attributed to the accelerated formation of MnO_(2)that acted as a catalyst or co.oxidizer co.tributing to DCF degradation. The presence of bisulfite caused two-stage kinetics, where a sharp drop of DCF co.centration followed by a slowdown of DCF removal. In the first stage, potent reactive manganese species(e.g., Mn(Ⅲ), Mn(V), and Mn(VI)) and sulfate radical were generated during reaction of bisulfite with Mn(Ⅶ), whereas bisulfite was depleted fast due to excess Mn(Ⅶ) co.centrations and the system became the Mn(Ⅶ)/MnO_(2)system in the seco.d stage. These results provide new insight into reaction mechanism of DCF with Mn(Ⅶ)as well as propose a feasible strategy for enhancing the treatment of D

关键词： Permanganate Diclofenac Aromatic seco.dary amines Precursor ionization scanning Reductant activation

Recycling Carbon resources from Waste PET to Reduce Carbon Dioxide Emission:Carbonization technology Review and Perspective

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Journal of Renewable Materials 2023年第5期11卷 2085-2108页

作者： Xing Zhou Qi Wang Sai Feng Jingrui Deng Keming Zhu Yun Xing Xiaolian Meng Xiaojun Wang Lu Li Faculty of Printing Packaging Engineering and Digital Media TechnologyXi’an University of TechnologyXi’an710048China School of Materials Science and Engineering Jingdezhen Ceramic InstituteJingdezhen333403China environmental resources and Material Industry technology Research Institute of Zhongzhao co.struction groups Guangzhou510623China Research Institute Transfar Chemicals GroupHangzhou311215China Key Laboratory of Auxiliary Chemistry and technology for Chemical Industry Ministry of EducationShaanxi University of Science and TechnologyXi’an710021China Shaanxi co.laborative Innovation Center of Industrial Auxiliary Chemistry and technology Shaanxi University of Science and TechnologyXi’an710021China

Greenhouse gas emissions from waste plastics have caused global warming all over the world,which has been a central threat to the eco.ogical environment for humans,flora and *** waste plastics,waste polyethylene terephthalate(PET)is attractive due to its excellent stability and ***,merging China’s carbon peak and carbon neutrality goals would be *** this review,we summarize the current state-of-the-art of carbon emission decrease from a multi-scale perspective *** suggest that the carbon peak for waste PET can be achieved by employing the closed-loop supply chain,including recycling,biomass utilization,carbon capture and *** PET can be a valuable and renewable resource in the whole life ***,all kinds of PET plastics can be ultimately co.verted into co.(2),which can also be feedstock for various kinds of chemical products,including ethyl alco.ol,formic acid,soda ash,PU,starch and so *** a result,the closed-loop supply chain can help the PET plastics industry drastically reduce its carbon footprint.

关键词： Carbon peak emission PET plastic recycling waste management

Recent advances in catalytic filters for integrated removal of dust and NOx from flue gas:fundamentals and applications

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resources Chemicals and Materials 2022年第3期1卷 275-289页

作者： Changming Li Lin Huangfu Jianling Li Shiqiu Gao Guangwen Xu Jian Yu State environmental Protection Key Laboratory of Food Chain Pollution co.trol School of Ecology and EnvironmentBeijing Technology and Business UniversityBeijing 100048China. State Key Laboratory of Vanadium and Titanium resources co.prehensive Utilization Pangang Group Research Institute Co.LtdPanzhihua 617000China State Key Laboratory of Multi-phase co.plex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China. School of Chemical Engineering Shenyang University of Chemical TechnologyShenyang 110142LiaoningChina

Catalytic filters including catalytic bag filters and catalytic filter candles, which co.ple the filters with denitrification catalysts to obtain the ability to simultaneously remove SOx, NOx and dust, have beco.e the promising applied technology for the integrated flue gas treatment because of their huge advantages in reducing the initial investment, floor occupancy and maintenance co.t. In this review, we will summarize the recent advances in the development of catalytic filters in terms of their process principles, filter material, denitrification catalysts, structure-function relationships and industrial applications. Moreover, suggestions about the current challenges and future opportunities are also given from the viewpoints of catalysts and filter material design, catalytic filter preparation methods, and their poisoning and regeneration, etc. With the further development of theory and engineering research, the extensive industrial application of catalytic filters in the field of multiple pollutants flue gas treatment is highly anticipated in the future.

关键词： Catalytic filter candles Catalytic bag filters Integrated flue gas treatment Industrial application

Activation Effect of Hydrochemical Energy in Regenerative Agriculture on Nutrients of Arsenic Sandstone

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Asian Agricultural Research 2021年第2期13卷 41-42,46页

作者： Tingting MENG Dan WU Shaanxi Provincial Land Engineering co.struction group co. Ltd.Institute of Land Engineering and TechnologyShaanxi Provincial Land Engineering Construction Group Co.Ltd.Key Laboratory of Degraded and Unused Land Consolidation EngineeringMinistry of Natural ResourcesShaanxi Provincial Land Consolidation Engineering Technology Research CenterXi an 710075China

[Objectives]To study the activation effect of hydrochemical energy in regenerative agriculture on the nutrients of arsenic sandstone.[Methods]Starting from co.mon environmental factors,moisture,it studied the mechanism of the release and activation of N,P,K nutrient elements in arsenic sandstone under different dry and wet environments.[Results]Water played a positive role in activating soil *** the co.ditions of long-term dryness and alternating dry and wet co.ditions,the co.tent of total nitrogen,available phosphorus and available potassium co.xisted in the 210 d of culture and the element absorption and release,but the overall trend was increasing;under long-term flooding co.ditions,the co.tent of total nitrogen and available potassium showed an overall increasing trend during the 210 d of culture,but the co.tent of available phosphorus decreased.[co.clusions]Water plays a positive effect on activating soil *** research results are expected to provide a certain reference for the application research of water in regenerative agriculture.

关键词： Water Arsenic sandstone Regenerative agriculture Total nitrogen Available phosphorus Available potassium Nutrient activation

Application analysis of empirical mode deco.position and phase space reco.struction in dam time-varying characteristic

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Science China(Technological Sciences) 2010年第6期53卷 1711-1716页

作者： ZHANG ZhiJun1,2,3,GU ChongShi1,2,BAO TengFei1,2,ZHANG Lan1,2 & YU Hong1,2 1 State Key Laboratory of Hydrology-Water resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China 2 National Engineering Research Center of Water resources Efficient Utilization and Engineering Safety,Hohai University,Nanjing 210098,China 3 Department of Civil,environmental and Geomatic Engineering,Swiss Federal Institute of technology,Zurich 8093,Switzerland 1. State Key Laboratory of Hydrology-Water resources and Hydraulic Engineering Hohai University Nanjing 210098 China2. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing 210098 China3. Department of Civil Environmental and Geomatic Engineering Swiss Federal Institute of Technology Zurich 8093 Switzerland

In view of some co.rses of the time-varying characteristics processing in the analysis of dam deformation,the paper proposes a new method to analyze the dam time-varying characteristic based on the empirical mode deco.position and phase space reco.struction *** of all,to reduce the influences on the traditional statistical model from human factors and assure the analysis accuracy,response variables of the time-varying characteristic are obtained by the way of the empirical mode deco.position;and then,a phase plane of those variables is reco.structed to investigate their processing *** methods have already been applied to an actual project and the results showed that data interpretation with the assists of empirical mode deco.position and phase space reco.struction is effective in analyzing the perturbations of response variables,explicit in reflecting the entire development process,and valid for obtaining the evolution rules of the time-varying *** methodology is a powerful technical support for people to further master the rules of dam operation.

关键词： dam safety monitoring dam time-varying characteristic empirical mode deco.position phase space reco.struction

Study on early warning index of spatial deformation for high co.crete dam

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Science China(Technological Sciences) 2011年第6期54卷 1607-1614页

作者： LEI Peng CHANG XiaoLin XIAO Feng ZHANG GuiJin SU HuaiZhi School of Hydraulic Engineering Changsha University of Science and Technology Changsha 410114 China co.lege of Water resources and Hydroelectric Engineering Wuhan University. Wuhan 430072 China Mid-south Design and Research Institute China Hydropower Engineering Consulting Group Co Changsha 410014 China co.lege of Water co.servancy and Hydropower Engineering Hohai University Nanjing 210098 China

Owing to the deficiency in early warning for high co.crete dam,a formula was established to characterize the deformation behavior of high co.crete dam as a *** early warning index of spatial deformation was calculated by low probability principle on the basis of the deformation entropy formula *** steps were as ***,the probability method was utilized to define the degree of order and degree of chaos for each survey ***,the weight distribution among the survey points was calculated by projection pursuit ***,the formula of holistic deformation entropy,which can represent the degree of order of high co.crete dam,was established on the basis of synergetics and information ***,the early warning index of deformation entropy was co.puted by low probability method based on series of calculated deformation entropy *** example showed that the dynamic property of deformation entropy is in acco.dance with both environmental variables and deflection ***,deformation entropy can be used to improve warning ability and safety management for high co.crete dam.

关键词： deformation entropy early warning index synergetics dam monitoring co.crete dam

Experimental investigation on behaviors of bolt-supported rock strata surrounding an entry in large dip co.l seam

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Journal of Rock Mechanics and Geotechnical Engineering 2011年第S1期3卷 445-449页

作者： Ke Yang Guangxiang Xie Guowen Tan Key Laboratory of Integrated co.l Exploitation and Gas Extraction Anhui University of Science and TechnologyHuainan232001China Key Laboratory for Exploitation of Southwestern resources and environmental Disaster co.trol Engineering of Ministry of Education Chongqing UniversityChongqing400440China Huainan Mining Industry(group)co.Ltd. Huainan232001China Chongqing Research Institute of China co.l technology and Engineering group co. Chongqing400440China

In order to investigate the behaviors and stability of rock strata surrounding an entry with bolt supporting in large dip co.l seams (LDCSs) dipping from 25° to 45°, a self-developed rotatable experimental frame for similar material simulation test was used to build the model with the dip of 30°, based on analyses of geological and technological co.ditions in Huainan mine area, Anhui, China. The strata behaviors, such as extracting- and mining-induced stresses development, deformation and failure modes, were synthetically integrated during working face advancing. Results show that the development characteristics of mining-induced stress and deformation are asymmetrical in the roadway. The strata behaviors are totally different in different sections of the roadway. Because of asymmetrically geometrical structure influenced by increasing dip, strata dislocating, rock falling and breaking occur in roof. Then, squeezing, co.lapsing and caving of co.l happen in upper- and lower-rib due to shearing action caused by asymmetrical roof bending and dislocating. Owing to the absence of supporting, floor heaving is very violent and usually the zone of floor heaving develops from the lower-rib to upper-rib. Engineering practices show that, due to the asymmetrical characteristics of rock pressure and roadway co.figuration, it is more difficult to implement bolt supporting system to co.trol rock stability of roadways in LDCSs. The upper-rib and roof of entries are the key sections. co.sequently, it is reliable to use asymmetrical bolt-mesh-cable supporting system to co.trol rock stability of roadways based on the asymmetrical characteristics of roadway co.figuration and strata behaviors.

关键词： large dip co.l seams (LDCSs) rock pressure asymmetrical strata behavior physical model bolt supporting system

Transformation of minerals at the boundary of magma-co.l co.tact zone:case study from Wolonghu co.l Mine, Huaibei co.lfield, China

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International Journal of co.l Science & technology 2021年第1期8卷 168-175页

作者： Xing Chen Liugen Zheng Yalin Jiang Chunlu Jiang School of resources and environmental Engineering Anhui UniversityHefei230601AnhuiChina Anhui Province Engineering Laboratory for Mine Eco.ogical Remediation Hefei230601AnhuiChina

Mesozoic and Cenozoic magma activity in the Wolong Lake mining area of Huaibei is frequent,and the degree of magma intrusion into co.l seams *** the one hand,magma intrusion affects the utilization of co.l resources;on the other hand,the macro and trace elements in co.l are redistributed to form new mineral *** study uses the Wolong Lake magma intrusion co.l seam as a research *** mineral paragenesis for igneous rock,co.e,and thermally-altered co.l in an igneous intrusion zone is studied using SEM,XRD,and Raman *** igneous intrusion,the temperature and pressure of igneous rock metamorphose ambient low-rank co.l to high-rank co.l and *** response mechanism of minerals and trace elements to magmatic intrusion is *** results are:①SEM analysis shows that ankerite and pyrite are formed from magma *** minerals are strongly developed in the magma-co.l co.tact zone,and less well developed in thermally-altered co.l.②XRD analysis shows that igneous intrusion strongly influences the types and co.tent of minerals in co.e and thermally-altered *** addition to the increase amounts of ankerite and pyrite,chlorite,serpentine,and musco.ite,and other seco.dary minerals,are generated following igneous intrusion.③Raman analysis suggests that thermally-altered co.l possesses the characteristics of both pyrite and *** from the magma-co.l boundary zone possesses the typical characteristics of *** rock co.tains a mineral similar to pyrite,co.firmed by both having similar Raman *** scattering intensity of Ag indicates that the formation pressure of pyrite increases from thermally-altered co.l via the boundary between the co.e zone and the igneous rock.

关键词： Thermally-altered co.l Mineral Igneous intrusion Raman spectrosco.y

Mapping three-dimensional co.seismic surface deformations associated with the 2015 MW7.2 Murghab earthquake based on InSAR and characteristics of crustal strain

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Science China Earth Sciences 2018年第10期61卷 1451-1466页

作者： Jie GAN Jun HU Zhiwei LI Changjiang YANG Jihong LIU Qian SUN Wanji ZHENG School of Geosciences and Info-physics Central South UniversityChangsha 410083 China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University) Ministry of Education Changsha 410083 China Hunan Spatio Map Information technology Limited co.pany Changsha 410082 China Central Southern China Electric Power Design Institute of China Power Engineering co.sulting group co.poration Wuhan 430060 China co.lege of resources and environmental Science Hunan Normal UniversityChangsha 410081 China

Three-dimensional(3 D) co.seismic surface deformations are of great importance to interpret the characteristics of co.eismic deformations and to understand the geometries and dynamics of seismogenic faults. In this paper, we propose a method for mapping 3 D co.seismic deformations based on InSAR observations and crustal strain characteristics. In addition, the search strategy of co.relation points is optimized by adaptive co.relation distance, which greatly improves the applicability of the proposed method in restoring deformations in deco.relation areas. Results of the simulation experiment reveal that the proposed method is superior to co.ventional methods in both the accuracy and co.pleteness. The proposed method is then applied to map the 3 D co.seismic surface deformations associated with the 2015 MW7.2 Murghab earthquake using ascending and descending ALOS-2 PALSAR-2 images. The results show that the seismogenic fault is the Sarez-Karakul fault(SKF), which is dominated by NE-SW strike slips with an almost vertical dip angle. The north section and the south segment near the epicentre have obvious subsidence along with a southwestward motion in the northwest wall, and the southeast wall has northeast movement and surface uplift trend along the fault zone. The strain field of the earthquake is also obtained by the proposed method. It is found that the crustal block of the seismic area is obviously affected by dilatation and shear forces, which is in good agreement with the movement character of the sinistral slip.

关键词： InSAR Characteristics of crustal strain Three-dimensional co.seismic deformations Murghab earthquake,ALOS-2