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Novel Biological Methods for Detection and Degradation of Organophosphate pesticides

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Novel Biological Methods for Detection and Degradation of Or...

CuFe2O4@GO nanocomposite as an effective and recoverable catalyst of peroxymonosulfate activation for degradation of aqueous dye pollutants

2007中国科协年会

作者： Ashok Mulchandani department of chemical and environmental Engineering University of California Riverside CA 92521USA

Organophosphates are amongst the most toxic substances *** are used as pesticides,insecticides and chemical warfare *** compounds act by inhibiting the activity of acetylcholinesterase that results in the accumulation of acetylcholine causing interference with muscular response and eventually ***,there is a need for sensitive,selective,rapid and reliable sensors for measurement and rapid and cost-effective methods for neutralization of organophosphates.

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Chinese chemical Letters 2019年第12期30卷 2216-2220页

作者： Xiaoman Lei Menghan You Fei Pan Min Liu Peng Yang Dongsheng Xia Qiang Li Yanting Wang Jie Fu School of environmental Engineering Wuhan Textile UniversityEngineering Research Centre for Clean Production of Textile Dyeing and PrintingMinistry of EducationWuhan 430073China department of environmental Science&Engineering Fudan UniversityShanghai 200438China

Recently,heterogeneous activation of peroxymonosulfate(PMS) to oxidatively degrade organic pollutants has been a *** the present work,copper ferrite-graphite oxide hybrid(CuFe2 O4@GO)was prepared and used as catalyst to activate PMS for degradation of methylene blue(MB) in aqueous solution.A high degradation efficiency(93.3%) was achieved at the experimental conditions of20 mg/L MB,200 mg/L CuFe2 O4@GO,0.8 mmol/L PMS,and 25℃***,CuFe2 O4@GO showed an excellent reusability and *** effects of various operational parameters including pollutant type,solution pH,catalyst dosage,PMS dosage,pollutant concentration,temperature,natural organic matter(NOM),and inorganic anions on the catalytic degradation process were comprehensively investigated and *** further mechanistic study revealed the Cu(Ⅱ)/Cu(Ⅰ) redox couple on CuFe2 O4@GO played the dominant role in PMS activation,where both hydroxyl and sulfate radicals were generated and proceeded the degradation of *** general,CuFe2 O4@GO is a promising heterocatalyst for PMS-based advanced oxidation processes(AOPs) in wastewater treatment.

关键词： CuFe2O4@GO Peroxymonosulfate Methylene blue Sulfate radical Advanced oxidation processes

Preparation of transparent nanostructured N-doped TiO_2 thin films by combination of sonochemical and CVD methods with visible light photocatalytic activity

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Journal of Advanced Ceramics 2018年第3期7卷 185-196页

作者： Hossein RASOULNEZHAD Ghader HOSSEINZADEH Reza HOSSEINZADEH Naser GHASEMIAN department of Electrical & Electronics Engineering Standard Research Institute (SRI) department of chemical Engineering University of Bonab Medical Laser Research Group Medical Laser Research Center

Pollution of water resources with pesticide compounds has raised serious environmental problems,and for photocatalytic degradation of these pollutants,thin film photocatalysts are preferred to colloidal ones due to the separation problem of colloidal *** this work,nanostructured TiO_2 and N-doped TiO_2 thin films with high transparency were deposited on glass and quartz substrates through sonochemical–chemical vapor deposition(CVD)*** films prepared on glass and quartz substrates had nanocubic and nanospherical morphology,*** presence of N atoms in the structure of TiO_2 resulted in a decrease in the band gap energy of TiO_2 and also in the reduction of photogenerated electron–hole recombination ***,the presence of N atoms induced the formation of Ti^(3+)species which can act as hole trapping *** prepared thin films were also used for the visible light photocatalytic degradation of paraoxon *** to these results among the prepared thin films,the N-doped TiO_2 thin films have higher photocatalytic activity than pure TiO_2 thin ***,in comparison with the thin films deposited on quartz substrate,the films on glass substrate have higher photocatalytic performance,which can be related to the special nanocubic morphology of these samples.

关键词： N-doped TiO2 film transparent photocatalyst chemical vapor deposition (CVD) ultrasonic

Organic micro-pollutant removal in liquid-phase using carbonized silk cotton hull

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Journal of environmental Sciences 2008年第9期20卷 1046-1054页

作者： M Sathishkumar A R Binupriya D Kavitha R Selvakumar K K Sheema J G Choi department of Food Science and Technology Institute of Agricultural Science and Technology Chonbuk National University department of chemical Engineering Yonsei University department of Biotechnology Bharathiar University department of Plant biology and Biotechnology Government Arts College National Agricultural Products Quality Management Services

Phenolic compounds constitute one of the major pollutants in the modern world. Although many physical and chemical treatment technologies for their removal exist, most of them are economically not feasible. The present study was aimed at using silk cotton hull, a potent agricultural waste as an adsobent for removal of 2,4-dichlorophenol (2,4-DCP), which was used as a model phenolic compound. The process parameters were investigated and optimized conditions were determined. The equilibrium time was found to ...

关键词： silk cotton hull carbon adsorption 2 4-DCP temperature kinetic study

Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors

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Chinese chemical Letters 2019年第12期30卷 2241-2244页

作者： Ailing Zhu Yingying Guo Guangliang Liu Maoyong Song Yong Liang Yong Cai Yongguang Yin Institute of Environment and Health Jianghan UniversityWuhan 430056China State Key Laboratory of environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Laboratory of environmental Nanotechnology and Health Effect Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China department of Chemistry and Biochemistry Florida International UniversityMiamiFL 33199United States

Dark formation of hydroxyl radical upon oxidation of reduced iron minerals plays an important role in the degradation and transformation of organic and inorganic ***,we compared the hydroxyl radical formation from various reduced iron minerals at different redox conditions.·OH production was generally observed from the oxidation of reduced iron minerals,following the order:mackinawite(FeS)>reduced nontronite(iron-bearing smectite clay)> pyrite(FeS2)> side rite(FeCO3).Structural Fe^2+ and dissolved O2 play critical roles in ·OH production from reduced iron minerals.·OH production increases with decreasing pH,and Cl^-has little effect on this *** importantly,dissolved organic matter significantly enhances ·OH production,especially under O2 purging,highlighting the importance of this process in ambient *** sunlight-independent pathway in which ’OH forms during oxidation of reduced iron minerals is helpful for understanding the degradation and transformation of various inorganic and organic pollutants in the redox-fluctuation environments.

关键词： Reduced iron minerals Hydroxyl radical Dark oxidation Mackinawite Dissolved organic matter

Advancements in adsorption and photodegradation technologies for Rhodamine B dye wastewater treatment:fundamentals,applications,and future directions

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Green chemical Engineering 2024年第4期5卷 440-460页

作者： Peter Olusakin Oladoye Mohammed Kadhom Idrees Khan Kosar Hikmat Hama Aziz Yakubu Adekunle Alli department of Chemistry and Biochemistry Florida International University11200 SW 8th StMiamiFL33199USA Analytical/environmental Chemistry Unit Department of Pure and Applied ChemistryLadoke Akintola University of TechnologyP.M.B4000Nigeria department of environmental Science College of Energy and Environmental ScienceAlkarkh University of ScienceBaghdad10081Iraq School of Chemistry and chemical Engineering Northwestern Polytechnical UniversityXi'an710129China department of Chemistry College of ScienceUniversity of SulaimaniQlyasan StreetSulaymaniyah46001Kurdistan RegionIraq department of Medical Laboratory of Science College of Health SciencesUniversity of Human DevelopmentSulaymaniyah46001Kurdistan RegionIraq CNRS LCC(Laboratoire de Chimie de Coordination)UPR8241Universite de ToulouseUPSINPTToulouseCedex 4F-31077France

Organic dye pollutants present in wastewater pose a significant global *** pollutants,the synthetic dye Rhodamine B(RB)stands out due to its non-biodegradable nature and associated neurotoxic,carcinogenic,and respiratory irritant *** research has been conducted on the efficacy of adsorption and photodegradation techniques for the removal of RB from *** adsorption and advanced oxidation processes(AOPs)have gained considerable attention for their effectiveness in recent years,the underlying behaviors and mechanisms of these technologies remain incompletely ***,a comprehensive of recent research progress in this domain is imperative to clarify the basics and present the up-to-date *** review provides an in-depth exploration of the fundamentals,advancements,and future trajectories of RB wastewater treatment technologies,mainly encompassing adsorption and *** work starts with a general introduction of outlining the sources,toxicity,and diverse applicable removal ***,it thoroughly examines crucial techniques within non-photochemical,photochemical,and adsorption technologies,such as UV light assisted AOP,catalyst assisted AOP,ozonation,Fenton system,electrochemical AOP,and adsorption *** primary objective is to furnish a broad overview of these techniques,elucidating their effectiveness,limitations,and *** this,the review encapsulates state-of-theart computational simulations pertaining to RB adsorption and interactions with clays and other ***,it delves into column adsorption of RB dye,and elucidates various influencing factors,including bed height,feed concentration,pollutant(RB)feeding or flow rate,and column *** panoramic review aims to provide valuable insights into suitable techniques,research gaps,and the applicability of nonphotochemical,photochemical,and adsorption technologies in the treatment of

关键词： Rhodamine B Wastewater treatment Photodegradation Column adsorption Dye removal Advanced oxidation processes

Heavy Metals and PAHs in Sewage Sludge from Twelve Wastewater Treatment Plants in Zhejiang Province

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Biomedical and environmental Sciences 2008年第4期21卷 345-352页

作者： C. M. TIENTCHEN College of environmental and Resource Sciences Zhejiang University

Objective To investigate the heavy metals （HMs） and polycyclic aromatic hydrocarbons （PAHs） in sludge of twelve wastewater treatment plants （WWTPs） in Zhejiang province of China, and to assess their potential for land application. Methods Sludge was collected from 12 WWTPs within the province. GC-MS and AAS were used to measure PAHs and HMs contents in sludge. Results Concentrations of HMs in most of the sludge samples were below the regulatory limits for the sludge to be used in agriculture in China with the exception of Zn in 2 sludge samples and Cd in 1 sample. All 16 PAHs, targeted by the USEPA agency, were found in the sludge from the twelve plants with a total concentration ranging from 33.73 mg kg^-1 to 82.58 mg kg^-1 （dry weight, d.w.）. The levels of Σ9 PAHs varied from 13.87 mg kg^-1 to 61.86 mg kg^-1 （d.w.） in the sludge, far exceeding the limitation value recommended by the Europe Union. The concentration and composition of PAHs in sewage sludge varied and depended mainly on the quantity and type of industrial wastewater accepted by the WWTPs. A significant relationship between the proportion of industrial wastewater received by WWTPs and the total content of 16 PAHs in the sludge was observed. Conclusion PAHs have become one of the primary pollutants in sludge of Zhejiang WWTPs instead of HMs. It is, therefore, essential to reduce the contents of PAHs before the sludge can be used in agriculture through proper treatment.

关键词： Sludge Heavy Metal chemical Fractions Polycyclic aromatic hydrocarbons Contribution

Pesticide wastewater treatment using the combination of the microbial electrolysis desalination and chemical-production cell and Fenton process

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Frontiers of environmental Science & Engineering 2020年第1期14卷 137-151页

作者： Songwei Lin Yaobin Lu Bo Ye Cuiping Zeng Guangli Liu Jieling Li Haiping Luo Renduo Zhang Guangdong Provincial Key Laboratory of environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China

The combination of the microbial electrolysis desalination and chemical-production cell(MEDCC)and Fenton process for the pesticide wastewater treatment was investigate in this *** wastewater with several toxic pesticides,1633 mg/L COD,and 200 in chromaticity was used for the *** showed that desalination in the desalination chamber of MEDCC reached 78%.Organics with low molecular weights in the desalination chamber could be removed from the desalination chamber,resulting in 28%and 23%of the total COD in the acid-production and cathode chambers,*** desalination in the desalination chamber and organic transfer contributed to removal of pesticides(e.g.,triadimefon),which could not be removed with other methods,and of the organics with low molecular *** COD in the effluent of the MEDCC combined the Fenton process was much lower than that in the perixo-coagulaiton process(<150 vs.555 mg/L).The combined method consumed much less energy and acid for the pH adjustment than that the Fenton.

关键词： Pesticide wastewater COD removal Microbial electrolysis desalination and chemical-production cell Energy consumption Fenton oxidation

Knowledge-guided machine learning reveals pivotal drivers for gasto-particle conversion of atmospheric nitrate

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environmental Science and Ecotechnology 2024年第3期19卷 100-108页

作者： Bo Xu Haofei Yu Zongbo Shi Jinxing Liu Yuting Wei Zhongcheng Zhang Yanqi Huangfu Han Xu Yue Li Linlin Zhang Yinchang Feng Guoliang Shi State environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin Key Laboratory of Urban Transport Emission ResearchCollege of Environmental Science and EngineeringNankai UniversityTianjin300350China CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research(CLAER) College of Environmental Science and EngineeringNankai UniversityTianjin300350China department of Civil Environmentaland Construction EngineeringUniversity of Central FloridaOrlandoFLUSA School of Geography Earth and Environment Sciences University of BirminghamBirminghamB152TTUK State Key Laboratory of Precision Measuring Technology and Instruments Tianjin Key Laboratory of air Pollutants Monitoring TechnologySchool of Precision Instrument and Opto-electronics EngineeringTianjin UniversityTianjin300072China Gigantic Technology(Tianjin)Co. LtdTianjin300072China College of Computer Science Nankai UniversityTianjin300350China China National environmental Monitoring Centre Beijing100012China

Particulate nitrate,a key component of fine particles,forms through the intricate gas-to-particle conversion *** process is regulated by the gas-to-particle conversion coefficient of nitrate(ε(NO_(3)^(-))).The mechanism betweenε(NO_(3)^(-))and its drivers is highly complex and nonlinear,and can be characterized by machine learning ***,conventional machine learning often yields results that lack clear physical meaning and may even contradict established physical/chemical mechanisms due to the influence of ambient *** urgently needs an alternative approach that possesses transparent physical interpretations and provides deeper insights into the impact ofε(NO_(3)^(-)).Here we introduce a supervised machine learning approachdthe multilevel nested random forest guided by theory *** approach robustly identifies NH4 t,SO_(4)^(2-),and temperature as pivotal drivers forε(NO_(3)^(-)).Notably,substantial disparities exist between the outcomes of traditional random forest analysis and the anticipated actual ***,our approach underscores the significance of NH4 t during both daytime(30%)and nighttime(40%)periods,while appropriately downplaying the influence of some less relevant drivers in comparison to conventional random forest *** research underscores the transformative potential of integrating domain knowledge with machine learning in atmospheric studies.

关键词： Machine learning Data driven Theoretical approach Domain knowledge Guide