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Journal of Rare Earths 2014年第2期32卷 153-158页

作者：付名利林俊敏朱文波吴军良陈礼敏黄碧纯叶代启 College of Environment and Energy South China University of Technology guangdong Provincial Key Laboratory of Atmospheric Environment and pollution control guangdong high education engineering technology research center for air pollution control Key Lab of Ministry of education for pollution control and Ecosystem Restoration in Industry Clusters

MnOx（0.4）-CeO2 was investigated for soot oxidation assisted with a pulse dielectric barrier discharge （DBD）. The catalysts were evaluated and characterized with TPO （temperature programmed oxidation）, X-ray diffraction （XRD）, Raman and X-ray photo- electron spectroscopy （XPS）. The ignition temperature Ti for soot oxidation decreased from 240.8 to 216.4 ℃ with the increase of the pulse DBD frequencies from 50 to 400 Hz, lower than that of the case without pulse DBD present （253.4 ℃）. The results of XRD, Raman and XPS agreed well with the TPO activities of MnOx（0.4）-CeO2 towards soot oxidation. More solid solution of ceria and manganese, and surface reactive species including 02 , O and Mn4＋ were responsible for the enhancement of soot oxidation due to pulse DBD injection in the present study. For solid solution favors to the activation and transformation of those species, which are be- lieved to be involved in the soot oxidation in a hybrid catalysis-plasma.

关键词： diesel soot MnOx(0.4)-Ce02 pulse dielectric barrier discharge reactive species rare earths

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第01期 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical engineering Process of Ministry of education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

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A porous biochar supported nanoscale zero-valent iron material highly efficient for the simultaneous remediation of cadmium and lead contaminated soil

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Journal of Environmental Sciences 2022年第3期34卷 231-241页

作者： Wei Qian Jing-Yi Liang Wen-Xuan Zhang Shi-Ting Huang Zeng-Hui Diao guangdong Provincial engineering and technology research center for Agricultural Land pollution Prevention and control Zhongkai University of Agriculture and EngineeringGuangzhou 510225China

Risk associated with heavy metals in soil has been received widespread *** this study,a porous biochar supported nanoscale zero-valent iron(BC-nZVI)was applied to immobilize cadmium(Cd)and lead(Pb)in clayey *** results indicated that the immobilization of Cd or Pb by BC-nZVI process was better than that of BC or nZVI process,and about 80%of heavy metals immobilization was obtained in BC-nZVI *** of BC-nZVI could increase soil pH and organic matter(SOM).Cd or Pb immobilization was inhibited with coexisting organic compound 2,4-dichlorophenol(2,4-DCP),but 2,4-DCP could be removed in a simultaneous manner with Cd or Pb immobilization at low concentration *** immobilization of Cd and Pb was achieved in BC-nZVI process,and both Cd and Pb availability significantly *** Cd species inculding Cd(OH)_(2),CdCO_(3)and CdO were formed,whereas stable Pb species such as PbCO_(3),PbO and Pb(OH)_(2)were produced with BC-nZVI *** immobilization mechanism of Cd and Pb in soil by BC-nZVI was thereby *** study well demonstrates that BC-nZVI has been emerged as a potential technology for the remediation of multiple heavy metals in soil.

关键词： Cadmium(Cd) Lead(Pb) Biochar Nano zero valent iron(nZVI) Contaminated soil

Feasibility of low-intensity ultrasound treatment with hydroxylamine to accelerate the initiation of partial nitrification and allow operation under intermittent aeration

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Journal of Environmental Sciences 2024年第5期139卷 446-459页

作者： Jianxiong Jian Xiaojian Liao Zhihua Mo Shoupeng Li Lei Li Shaojin Chen Zhenhua Huang Junhao Chen Wencan Dai Shuiyu Sun Guangzhou Key Laboratory Environmental Catalysis and pollution control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China guangdong Province Solid Waste Recycling and Heavy Metal pollution control engineering technology research center Guangdong Polytechnic of Environmental Protection EngineeringFoshan 528216China Analysis and Test center Guangdong University of TechnologyGuangzhou 510006China

Partial nitrification is a key aspect of efficient nitrogen removal,although practically it suf-fers from long start-up cycles and unstable long-term operational *** address these drawbacks,this study investigated the effect of low intensity ultrasound treatment combined with hydroxylamine(NH2OH)on the performance of partial *** showthat compared with the control group,low-intensity ultrasound treatment(0.10W/mL,15 min)combined with NH2OH(5 mg/L)reduced the time required for partial nitrification initiation by 6 days,increasing the nitrite accumulation rate(NAR)and ammonia nitro-gen removal rate(NRR)by 20.4% and 6.7%,respectively,achieving 96.48% ***-tic analysis showed that NH2OH enhanced ammonia oxidation,inhibited nitrite-oxidizing bacteria(NOB)activity and shortened the time required for partial nitrification ***,ultrasonication combined with NH2OH dosing stimulated EPS(extracellular polymeric substances)secretion,increased carbonyl,hydroxyl and amine functional group abundances and enhanced mass *** addition,16S rRNA gene sequencing results showed that ultrasonication-sensitive Nitrospira disappeared from the ultrasound+NH_(2)OH system,while Nitrosomonas gradually became the dominant ***,the results of this study provide valuable insight into the enhancement of partial nitrification start-up during the process of wastewater nitrogen removal.

关键词： Partial nitrification Low-intensity ultrasound Hydroxylamine Ammonia oxidizing bacteria Nitrite oxidizing bacteria

Lattice-strained nanotubes facilitate efficient natural sunlight-driven CO_(2) photoreduction

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Nano research 2021年第8期14卷 2558-2567页

作者： Shujie Liang Xueming Liu Zuqi Zhong Bin Han Xiaohui Zhong Weiyi Chen Kainan Song Hong Deng Zhang Lin School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of TechnologyGuangzhou 510006China guangdong engineering and technology research center for Environmental Nanomaterials The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters(Ministry of Education)Guangzhou 510006China

Photocatalytic reduction of CO_(2) holds tremendous promise for alleviating the energy *** the progress that has been,made,there are still some challenges to overcome,such as the realization under real sunlight rather than the simulation *** this work,ultrathin Ni_(2)(OH)(PO_(4))nanotubes(NTs)prepared through hydrothermal route are applied as a novel catalyst for photocatalytic reduction of CO_(2) under real *** prepared Ni_(2)(OH)(PO_(4))NTs exhibit a 11.3 μmol·h^(-1) CO production rate with,96.1% CO ***,Ni_(2)(OH)(PO_(4))NTs have a positive impact on the facilitation of photoreduction in diluted CO_(2).Notably,when the system is performed under real sunlight,Ni_(2)(OH)(PO_(4))NTs afford an accumulated CO of ca.26.8 nmol with,96.9% CO selectivity,exceeding most previous inorganic catalysts under simulated irradiation in the *** experimental results demonstrate that the multisynergetic effects induced by surface-OH and the lattice strain serve as highly active sites for CO_(2) molecular adsorption and activation as well as electron transfer,hence enhancing photoreduction ***,this work provides experimental basis that CO_(2) photocatalysis can be put into practical use.

关键词： CO_(2)photoreduction diluted CO_(2) lattice strain natural sunlight application

Enhanced adsorption of arsenate by spinel zinc ferrite nano particles: Effect of zinc content and site occupation

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Journal of Environmental Sciences 2019年第5期31卷 248-255页

作者： Can Wu Yunyun Xu Si Xu Jingwei Tu Chen Tian Zhang Lin School of Environment and Energy The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education) South China University of Technology guangdong engineering and technology research center for Environmental Nanomaterials South China University of Technology

In this work, zinc ferrite spinel with different zinc contents(ZnxFe_3-xO_4) was synthesized by a hydrothermal method and used for removing As(V) in aqueous solution. X-ray diffraction(XRD) results indicated that in the crystal structure of ZnxFe_3-xO_4, the zinc atoms tended to occupy the octahedral sites for x 0.6. The size of ZnxFe_3-xO_4 crystallites increased with the increasing zinc content. Batch adsorption experiments showed that the adsorption isotherms could be well described by the Langmuir model, while the adsorption kinetics followed the pseudo-second-order kinetic model. Zinc ferrite exhibited the highest adsorption capacity towards As(V) when x = 0.6. Study of the mechanism indicated that doping with zinc increased the number of surface hydroxyl groups on ferrite spinel, and thus enhanced the adsorption capacity when x = 0.6. This work revealed the effects of doping site and content of metal atoms on the adsorption ability of ferrite spinel towards As(V).

关键词： Zinc ferrite Arsenate Adsorption Atom occupancy Hydroxyl groups

Efficient degradation of tetracycline by singlet oxygen-dominated peroxymonosulfate activation with magnetic nitrogen-doped porous carbon

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Journal of Environmental Sciences 2022年第5期34卷 330-340页

作者： Shaohua Wu Chunping Yang Yan Lin Jay J.Cheng guangdong Provincial Key Laboratory of Petrochemcial pollution Processes and control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaomingGuangdong 525000China College of Environmental Science and engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangshaHunan 410082China Maoming engineering research center for Organic pollution control Academy of Environmental and Resource SciencesGuangdong University of Petrochemical TechnologyMaomingGuangdong 525000China Hunan Provincial Environmental Protection engineering center for Organic pollution control of Urban Water and Wastewater ChangshaHunan 410001China Department of Biological and Agricultural engineering North Carolina State UniversityRaleighNC 27695USA

Nonradical reaction driven by peroxymonosulfate(PMS)based advanced oxidation pro-cesses has drawn widespread attention in water treatment due to their inherent advantages,but the degradation behavior and mechanism of organic pollutants are still *** this study,the performance,intermediates,mechanism and toxicity of tetracycline(TC)degra-dation were thoroughly examined in the constructed magnetic nitrogen-doped porous car-bon/peroxymonosulfate(Co-N/C-PMS)*** results showed that 85.4%of TC could be removed within 15 min when Co-N/C and PMS was simultaneously added and the degra-dation rate was enhanced by 3.4 and 14.7 folds compared with Co-N/C or PMS alone,***,the performance of Co-N/C was superior to that of most previously reported *** lines of evidence indicated that Co-N/C-PMS system was a singlet oxygen-dominated nonradical reaction,which was less interfered by pH and water compo-nents,and displayed high adaptability to actual water ***,the degrada-tion process was elaborated on the basis of three-dimensional excitation-emission matrix spectra and liquid chromatography-mass *** last,the toxicity of treated TC was greatly reduced by using microalgae Coelastrella *** ecological *** study provides a promising approach based on singlet oxygen-dominated nonradical reaction for eliminating TC in water treatment.

关键词： Tetracycline Peroxymonosulfate Activation Singlet oxygen Toxicity

Boosted photoreduction of diluted CO_(2) through oxygen vacancy engineering in NiO nanoplatelets

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Nano research 2021年第3期14卷 730-737页

作者： Weiyi Chen Xueming Liu Bin Han Shujie Liang Hong Deng Zhang Lin School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Resource RecyclingSouth China University of TechnologyGuangzhou510006China guangdong engineering and technology research center for Environmental Nanomaterials Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters(Ministry of Education)South China University of TechnologyGuangzhou510006China

Converting carbon dioxide(CO_(2))to diverse value-added products through photocatalysis can validly alleviate the critical issues of greenhouse effect and energy shortages *** particular,based on practical considerations,exploring novel catalysts to achieve efficient photoreduction of diluted CO_(2) is necessary and ***,this process is extremely challenging owing to the disturbance of competitive adsorption at low CO_(2) ***,we delicately synthesize oxygen vacancy-laden NiO nanoplatelets(r-NiO)via calcination under Ar protection to reduce diluted CO_(2) through visible light irradiation(>400 nm)assisted by a Ru-based *** from the strongly CO_(2) adsorption energy of oxygen vacancies,which was confirmed by density functional calculations,the r-NiO catalysts exhibit higher activity and selectivity(6.28×10^(3)µmol·h^(−1)·g^(−1);82.11%)for diluted CO_(2)-to-CO conversion than that of the normal NiO(3.94×10^(3)µmol·h^(−1)·g^(−1);65.26%).Besides,the presence of oxygen vacancies can also promote the separation of electron-hole *** research demonstrates that oxygen vacancies could act as promising candidates for photocatalytic CO_(2) reduction,offering fundamental guidance for the actual photoreduction of diluted CO_(2) in the future.

关键词： diluted CO_(2) photocatalytic reduction oxygen vacancies NiO nanoplatelets adsorption

Underestimated contribution of fugitive emission to VOCs in pharmaceutical industry based on pollution characteristics, odorous activity and health risk assessment

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Journal of Environmental Sciences 2023年第4期126卷 722-733页

作者： Qinhao Lin Zhong Gao Weikun Zhu Jiangyao Chen Taicheng An guangdong Key Laboratory of Environmental Catalysis and Health Risk control Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health Guangzhou Key Laboratory of Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Fugitive emission has been becoming an important source of volatile organic compounds(VOCs) in pharmaceutical industry,but the exact contribution of fugitive emission remains incompletely *** present study,pollution characteristics,odorous activity and health risk of stack and fugitive emissions of VOCs from four functional units (e.g.,workshop,sewage treatment station,raw material storage and hazardous waste storage) of three representative pharmaceutical factories were *** was the dominant contributor to VOCs of fugitive emission in comparison with other functional *** high concentration of VOCs from fugitive emission in unsealed workshop (94.87 mg/m^(3))was observed relative to sealed one (1.18 mg/m^(3)),accounting for 31%and 5%of total VOCs,*** emission of VOCs in the unsealed workshop mainly consisted of nhexane,1-hexene and *** activity indexes and non-cancer hazard ratios of these VOCs from fugitive emission in the unsealed workshop were as high as that from stack ***,cancer risk of dichloromethane from fugitive emission and stack exhaust was up to (1.6-1.8)×10^(-5).Odorous activity or health risk index of the VOCs from fugitive emission was up to 13 or 11 times of the corresponding threshold value,posing remarkable health threat on pharmaceutical ***?ndings highlighted the possibly underestimated contribution of fugitive emission on VOCs in the pharmaceutical industry.

关键词： Pharmaceutical industry VOC pollution Fugitive emission Odorous activity index Health risk

Photodegradation of xylene isomers:Kinetics,mechanism,secondary pollutant formation potential and health risk evaluation

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Journal of Environmental Sciences 2024年第2期136卷 658-669页

作者： Xiaoyan Chen Weikun Zhu Sufen Feng Jiangyao Chen guangdong Key Laboratory of Environmental Catalysis and Health Risk control Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and pollution control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Photodegradation technology has been widely applied in the purification of industrial aromatic ***,whether this technology efficiently removes the pollutants to prevent secondary pollution and health risk is still ***,the photodegradation processes of three xylenes were compared under designed reaction atmospheres and light *** lamp showed poor photodegradation ability toward xylenes,no matter in N_(2) or N_(2)+O_(2)system,while much higher photodegradation performance of xylenes were obtained under ultraviolet(UV)and vacuum ultraviolet(VUV)irradiation,especially in N_(2)+O_(2)+VUV system,where 97.9%of m-xylene,99.0%of o-xylene or 87.5%of p-xylene with the initial concentration of 860 mg/m^(3) was removed within 240 *** xylenes underwent three processes of photo-isomerization,photodecomposition and photo-oxidation to produce intermediates of aromatics,alkanes and *** them,the photo-isomerization products showed the highest concentration percentage(e.g.,≥50%in o-xylene system),confirming that photo-isomerization reaction was the dominated photodegradation process of ***,these isomerized products not only contributed about 97%and91%to the formation potential of O3(OFP)and secondary organic aerosols(SOAFP),but also displayed obvious non-carcinogenic risk,although one of photodecomposition product—benzene showed the highest occupational exposure ***,the secondary pollution and health risks of photodegradation products of xylenes were non-ignorable,although the OFP,SOAFP and health risks of the generated products reduced at least 4.5 times in comparison with that of the degraded *** findings are helpful for the appropriate application of this technology in the purification of industrial organic waste gas.

关键词： Isomer aromatics Photodegradation Ozone formation Secondary organic aerosols Health risk