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硫化纳米零价铁在环境污染物处理中的应用进展

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应用化工 2024年第6期53卷 1366-1371页

作者：周建宇占敬敬朱自强杨春林大连理工大学海洋科学与技术学院工业生态与环境工程重点实验室辽宁盘锦124221

介绍了硫化纳米零价铁的制备方法、影响处理效果的因素、应用场景、毒性和回收利用过程。纳米零价铁(nZVI)作为新兴材料,具有很强的吸附性和还原性,广泛用于去除土壤、地下水等环境中的氯代烃、农药以及重金属。但其易钝化以及较差的电... 详细信息

介绍了硫化纳米零价铁的制备方法、影响处理效果的因素、应用场景、毒性和回收利用过程。纳米零价铁(nZVI)作为新兴材料,具有很强的吸附性和还原性,广泛用于去除土壤、地下水等环境中的氯代烃、农药以及重金属。但其易钝化以及较差的电子选择性的特点一定程度上限制了其实际处理效果。近些年,学者们通过多种改性手段改变nZVI的性质。其中,硫化改性合成的硫化纳米零价铁(S-nZVI)还原性、电子选择性和稳定性更强,由于其独特的结构特征,S-nZVI在水环境和土壤环境的治理修复中具有广阔的应用前景,而进一步明确活性位点的催化机制是确定S-nZVI结构与活性关系的关键。

关键词：硫化纳米零价铁结构分析影响因素潜在风险

Selection and characterization of eight freshwater green algae strains for synchronous water purification and lipid production

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Frontiers of Environmental Science & Engineering 2016年第3期10卷 548-558页

作者： jingjing zhan Qiao zhanG Momei QIN Yu HONG Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology Shenzhen Key Laboratory of Drinking Water Source Safety Control Shenzhen Research Academy of Environmental Sciences Shenzhen 518001 China

The objective of this study is to select and characterize the candidate for synchronous water purification and lipid production from eight freshwater microalgae strains （Chlorella sp. HQ, C. emersonii, C. pyrenoidosa, C. vulgaris, Scenedesmus dimorphus, S. quadricauda, S. obiquus, Scenedesmus sp. LX1）. The strains Chlorella sp. HQ, C. pyrenoidesa, and S. obliquus showed superiority in biomass accumulation, while the top biomass producers did not correspond to the top lipid producers. S. quadricauda achieved higher lipid content （66.1%）, and Chlorella sp. HQ and S. dimorphus ranked down in sequence, with lipid content above 30%. Considering nutrient removal ability （total nitrogen （TN）： 52.97%; total phosphorus （TP）： 84.81%）, the newly isolated microalga Chlorella sp. HQ was the possible candidate for water purification coupled with lipid production. To further investigate the lipid producing and nutrient removal mechanism of candidate microalga, the ultra structural changes especially the lipid droplets under different water qualities （different TN and TP concentrations） were characterized. The results elucidate the nutrient-deficiency （TN： 3.0 mg·L^-1; TP： 0.3 mg·L^-1） condition was in favor of forming lipid bodies in Chlorella sp. HQ at the sub-cellular level, while the biomass production was inhibited due to the decrease in chloroplast number which could further suppress the nutrient removal effect. Finally, a two- phase cultivation process （a nutrient replete phase to produce biomass followed by a nutrient deplete phase to enhance lipid content） was conducted in a photo-bioreactor for Chlorella sp. HQ to serve for algae-based synchronous biodiesel production and wastewater purification.

关键词： freshwater microalgae biomass production lipid accumulation nutrient removal

Identification and characterization of Fe_(3)O_(4)/peroxodisulfate advanced oxidation products from sulfameter

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Journal of Environmental Sciences 2022年第12期34卷 227-235页

作者： Jie Du Zhijun An Yufeng Hu Xianliang Yi Hao Zhou jingjing zhan Minghuo Wu School of Ocean Science and Technology Dalian University of TechnologyPanjin 124221China

Sulfonamides(SAs)are one of the most widely used antibiotics and their residuals in the environment could cause some negative environmental *** oxidation such as Fenton-like reaction has been widely applied in the treatment of SAs polluted *** rates of 95%-99.7%were achieved in this work for the tested 8 SAs,including sulfisomidine,sulfameter(SME),phthalylsulfathiazole,sulfamethoxypyridazine,sulfamonomethoxine,sulfisoxazole,sulfachloropyridazine,and sulfadimethoxine,in the Fe_(3)O_(4)/peroxodisulfate(PDS)oxidation system after the optimization of PDS concentration and p ***,it was found that a lot of unknown oxidation products were formed,which brought up the uncertainty of health risks to the environment,and the identification of these unknown products was ***,SME was selected as the model compound,from which the oxidation products were never elucidated,to identify these intermediates/*** liquid chromatography-high resolution tandem mass spectrometry(LC-HRMS/MS),10 new products were identified,in which 2-amino-5-methoxypyrimidine(AMP)was confirmed by its *** investigation of the oxidation process of SME indicated that most of the products were not stable and the degradation pathways were very complicated as multiple reactions,such as oxidation of the amino group,SO_(2)extrusion,and potential cross-reaction occurred *** most of the products were not verified due to the lack of standards,our results could be helpful in the evaluation of the treatment performance of SAs containing wastewater.

关键词： Advanced oxidation Sulfonamides LC-HRMS/MS Identification Degradation products

Combining metal-microbe and microbe-microbe dual direct electron transfer on Fe(0)-cathode of bio-electrochemical system to enhance anaerobic digestion of cellulose wastewater

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Chinese Chemical Letters 2022年第6期33卷 3106-3112页

作者： Yang Li Ying Ma jingjing zhan Yaobin zhang Zisheng Zhao Zhiqiang Zhao School of Ocean Science and Technology Dalian University of TechnologyPanjin 124221China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China Key Laboratory of Industrial Ecology and Environmental Engineering(Dalian University of Technology) Ministry of EducationSchool of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

Considering that cathode of microbial electrochemical system(MES)is a good electrons source for methane production via direct/indirect electron transfer to electroactive microorganisms,and that Fe(0)is also a confirmed electron donor for some electroactive microorganisms through metal-microbe direct electron transfer(DET),Fe(0)-cathode was equipped into an MES digester to enhance cathodic methane *** results of this study indicated that the potential DET participator,Clostridium possibly obtained electrons directly from Fe(0)-cathode via metal-microbe electrons transfer,then transferred electrons directly to the definite DET participators,Methanosarcina/Methanothrix via microbemicrobe electrons transfer for CH_(4)*** addition,Methanobacterium is another specially enriched methanogen on Fe(0)-cathode,which might obtain electrons directly from Fe(0)-cathode to produce CH_(4) via metal/electrode-microbe *** increment of conductivity of cathodic sludge in Fe(0)-cathode MES digester(R1)further confirmed the enrichment of electroactive microorganisms participating in DET *** a consequence,a higher CH_(4) production(1205–1508 m L/d)and chemical oxygen demand(COD)removal(79.0%-93.8%)were achieved in R1 compared with graphite-cathode MES digester(R2,720–1090 m L/d and 63.6%-85.6%)and the conventional anaerobic digester(R3,384–428 m L/d and 35.2%-41.0%).In addition,energy efficiency calculated indicated that the output energy of CH_(4) production was 8.16 folds of electricity input in Fe(0)-cathode MES digester.

关键词： Fe(0)-cathode CH_(4)production Anaerobic digestion Direct electron transfer Microbial electrochemical system

Genetic relationship between serum pregnancy-associated plasma protein-A gene polymorphism and ischemic cerebrovascular disease in a Northern Han Chinese population

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Neural Regeneration Research 2012年第7期7卷 528-533页

作者： Haiping Wang Yan Song Chen zhang jingjing zhan Rui zhang Hajji Wang Department of Neurology Affiliated Hospital of Qingdao University Medical College Qingdao 266003 Shandong Province China Department of Gerontology Affiliated Hospital of Qingdao University Medical College Qingdao 266003 Shandong Province China

The present study recruited 193 patients with ischemic cerebrovascular disease from Inpatient and Outpatient Departments at the Affiliated Hospital of Qingdao University Medical College, China from August 2008 to May 2010, as well as 120 healthy volunteers from the Medical Examination Center at the Affiliated Hospital of Qingdao University Medical College, China, who served as controls for this study. Patients and control subjects were from the Han population in northern China. Enzyme- linked immunosorbent assay analysis revealed increased levels of serum pregnancy-associated plasma protein-A （PAPP-A） in ischemic cerebrovascular disease patients compared with healthy controls. In addition, the patients exhibited greater frequency of genotype CC and C alleles in a missense A/C （Tyr/Ser） polymorphism （dbSNP： rs7020782） of exon 14 in the PAPP-A gene. Multiple-factor logistic regression analysis on correction of age, gender, history of smoking, hypertension, diabetes mellitus, hypercholesteremia, and ischemic stroke family history showed that the risk for ischemic cerebrovascular disease in the population without the A allele at the A/C genetic locus in exon 14 of the PAPP-A was 2-folds greater than the population expressing the A allele. These experimental findings suggested that ischemic cerebrovascular disease correlated with the C allele in exon 14 of PAPP-A. In addition, the A allele is likely a protective gene; individuals carrying the A allele were less prone to ischemic cerebrovascular disease compared with individuals without the A allele.

关键词： atherosclerosis ischemic cerebrovascular disease metalloproteinase-9 polymorphisms pregnancy-associated plasma protein A

Aerosol-assisted submicronγ-Fe2O3/C spheres as a promising heterogeneous Fenton-like catalyst for soil and groundwater remediation:Transport,adsorption and catalytic ability

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Chinese Chemical Letters 2020年第3期31卷 715-720页

作者： jingjing zhan Mingfei Li Xiujuan zhang Yu An Weiqi Sun Aixia Peng Hao Zhou School of Food and Environment Dalian University of TechnologyPanjin 124221China School of Petroleum and Chemical Engineering Dalian University of TechnologyPanjin 124221China

This research reports a novel heterogeneous Fenton-like catalyst which could freely move through the model sediments and easily seize the pollutants in addition to efficiently catalyze H2O2,well suitable for soil and groundwater ***,submicron y-Fe2O3/C spheres were synthesized through a facile one-step aerosol-based *** a series of column tests,these spheres exhibit better transport ability due to their optimal size,conforming to the prediction by the Tufenkji-Elimelech filtration theo ***,y-Fe2O3/C spheres could act as a strong adsorbent for organic pollutants owing to the presence of carbon,thereby providing a driving force to gather contaminants into their vicinity and facilitating the *** addition,immobilization of y-Fe2O3 nanoparticles into carbon spheres protects iron oxides from aggregation,and thus retains the number of active sites for catalytic decomposition of ***,the system containing the as-prepared y-Fe2O3/C spheres and H2O2 shows the high removal efficiency and degradation efficiency in the remediation of recalcitrant organic contaminants such as methylene blue and sulfamethoxazole.

关键词： Heterogeneous Fenton Groundwater remediation Aerosol-assisted materials Transport Adsorption

Ischemic stroke susceptibility gene in a Northern Han Chinese population

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Neural Regeneration Research 2013年第20期8卷 1881-1891页

作者： Haiping Wang Shujuan Shi Wenjing Yan Yan Song jingjing zhan Chen zhang Haiji Wang Department of Neurology Affiliated Hospital of Qingdao University Medical College Health Care Office Affiliated Hospital of Qingdao University Medical College Department of Gerontology Affiliated Hospital of Qingdao University Medical College Department of Internal Medicine Ward 1 Jiao Nan People's Hospital

Interleukin-18 gene promoter polymorphisms are potential risk factors for ischemic cerebrovascular disease, and the –607C allele may increase ischemic stroke risk in the Han Chinese population. In the present study, we recruited 291 patients with ischemic cerebrovascular disease from the Affiliated Hospital of Qingdao University Medical College, China, and 226 healthy controls. Both patients and controls were from the Han population in northern China. Immunoresonance scattering assays detected increased serum amyloid A protein, C-reactive protein, and interleukin-18 levels in ischemic cerebrovascular disease patients compared with healthy controls. Analysis of the –607C/A （rs1946518） polymorphism in the interleukin-18 gene promoter showed ischemic cerebrovascular disease patients exhibited increased frequencies of the CC genotype and C alleles than healthy controls. Genotype and allele frequencies of the interleukin-18 –137G/C （rs187238） polymorphism and the –13T/C （rs11024595） polymorphism in the 5＇-flanking region of serum amyloid A, showed no significant difference between the two groups. Multivariate logistic regression analysis on the interleukin-18 promoter A/C genetic locus, for correction of age, gender, history of smoking, hypertension, diabetes mellitus, hypercholesteremia, and an ischemic stroke family history, showed ischemic cerebrovascular disease risk in individuals without the A allele （C homozygotes） was 2.2-fold greater than in A allele carriers. Overall, our findings suggest that the –13T/C （rs11024595） polymorphism in the 5′-flanking region of serum amyloid A has no correlation with ischemic cerebrovascular disease, but the C allele of the –607C/A （rs1946518） polymorphism in the interleukin-18 promoter is a high-risk factor for ischemic cerebrovascular disease in the Han population of northern China. In addition, the A allele is likely a protective gene for ischemic cerebrovascular disease.

关键词： neural regeneration brain injury interleukin-18 ischemic cerebrovascular disease atherosclerosis gene polymorphism C-reactive protein serum amyloid A protein inflammation neuroregeneration

Iron-carbon composite microspheres prepared through a facile aerosol-based process for the simultaneous adsorption and reduction of chlorinated hydrocarbons

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Frontiers of Environmental Science & Engineering 2015年第5期9卷 939-947页

作者： Bhanukiran SUNKARA Yang SU jingjing zhan Jibao HE Gary L. MCPHERSON Vijay T. JOHN Department of Chemical and Biomolecular Engineering Tulane University New Orleans LA 70118 USA Coordinated Instrumentation Facility Tulane University New Orleans LA 70118 USA Department of Chemistry Tulane University New Orleans

Iron-carbon （Fe-C） composite microspheres prepared through a facile aerosol-based process are effective remediation agents for the simultaneous adsorp- tion and reduction of chlorinated hydrocarbons. Complete dechlorination was achieved for the class of chlorinated ethenes that include tetrachloroethylene （PCE）, trichlor- oethylene （TCE）, cis- and trans-l,2-dicloroethylene （c- DCE, t-DCE）, 1,1-dichloroethylene （1,1-DCE） and, vinyl chloride （VC）. The Fe-C particles potentially provides multi-functionality with requisite characteristics of adsorp- tion, reaction, and transport for the effective in situ remediation of chlorinated hydrocarbons. The carbon support immobilizes the ferromagnetic iron nanoparticles onto its surface, thereby inhibiting aggregation. The adsorptive nature of the carbon support prevents the release of toxic intermediates such as the dichloroethylenes and vinyl chloride. The adsorption of chlorinated ethenes on the Fe-C composites is higher （〉 80%） than that of humic acid （〈 35%） and comparable to adsorption on commercial activated carbons （〉 90%）. The aerosol-based process is an efficient method to prepare adsorptive- reactive composite particles in the optimal size range for transport through the porous media and as effective targeted delivery agents for the in situ remediation of soil and groundwater contaminants.

关键词： chlorinated ethene iron-carbon aerosol,adsorption reductive dechlorination

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某车型BSG轮系皮带脱落的分析及改善优化

小型内燃机与车辆技术 2024年第2期53卷 19-22页

作者：刘后发邵杰何家栋战菁菁项兴富邵静萍宁波吉利罗佑发动机零部件有限公司浙江宁波315336

随着汽车行业的不断创新发展,发动机新技术不断的应用、各种测油耗APP的使用,消费者对乘用车的油耗及加速性能都极为关注,也开始对车辆的舒适性、整体NVH性能、油耗要求不断提高。新技术BSG系统,替代传统的发电机及起动机,有启动、助力... 详细信息

随着汽车行业的不断创新发展,发动机新技术不断的应用、各种测油耗APP的使用,消费者对乘用车的油耗及加速性能都极为关注,也开始对车辆的舒适性、整体NVH性能、油耗要求不断提高。新技术BSG系统,替代传统的发电机及起动机,有启动、助力、能量回收、发电等4个功能,从而提高车辆的动力性、经济性及NVH性能。由于BSG系统工况复杂,并且采用楔型皮带进行驱动,BSG电机在工况切换时会使得皮带的松紧边进行切换,通常会使用双向BSG张紧器进行张紧。针对某车型BSG轮系皮带脱落问题,对皮带脱落的产生机理及影响因素进行分析,通过对轮系系统的优化,结合耐久试验,研究了BSG轮系驱动皮带在光轮两端的长短调整对轮系的影响及改善效果。最终通过优化轮系布局解决了皮带脱落问题。

关键词： BSG轮系 BSG张紧器驱动皮带脱落惰轮