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Journal of Environmental Sciences 2017年第1期29卷 97-110页

作者： Varsha Srivastava mika sillanpää Laboratory of Green Chemistry School of Engineering ScienceLappeenranta University of TechnologySammonkatu 12FI 50130MikkeliFinland

Synthesis of malachite@clay nanocomposite was successfully carried out for the removal of cationic（Methylene Blue,MB） and anionic dyes（Congo Red,CR） from synthetic *** was characterized by TEM,SEM,FT-IR,EDS analysis and zeta *** analysis indicated that the particle diameter of nanocomposite was in the range of 14 to23 *** important parameters *** time,concentration of dyes,nanocomposite dosage,temperature and solution pH were optimized to achieve maximum adsorption *** the case of MB,removal decreased from 99.82%to 93.67%while for CR,removal decreased from 88.55%to 75.69%on increasing dye concentration from 100 to 450 mg/*** study confirmed the higher removal of CR in acidic range while MB removal was higher in alkaline *** study revealed the applicability of pseudo-second-order model for the adsorption of both *** values of AG0 for both systems suggested the feasibility of dye removal and support for spontaneous adsorption of CR and MB on *** showed 277.77 and 238.09 mg/g Langmuir adsorption capacity for MB and CR *** of dyes from the dye loaded nanocomposite was easily carried out with *** results indicate that the prepared malachite@clay nanocomposite is an efficient adsorbent with high adsorption capacity for the aforementioned dyes.

关键词： Adsorption Bentonite Dyes Kinetic study Methylene blue Congo red

Gadolinium doped tin dioxide nanoparticles: an efficient visible light active photocatalyst

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Journal of Rare Earths 2015年第12期33卷 1275-1283页

作者： Abdullah M Al-Hamdi mika sillanp?? Joydeep Dutta Laboratory of Green Chemistry Lappeenranta University of Technology Chair in Nanotechnology Water Research Center Sultan Qaboos University Functional Materials Division School of Information and Communication Technology KTH Royal Institute of Technology

Photocatalytic degradation of phenol with sol-gel prepared rare earth doped tin dioxide （SnO2） nanoparticles was reported. Gadolinium doped tin dioxide （SnO2：Gd） nanoparticles were found to absorb higher visible light compared to lanthanum, neodymium and cerium doped materials that were studied in detail. Photocatalytic degradation of phenol under artificial white light and sunlight in the presence of SnO2：Gd nanoparticles was studied with high performance liquid chromatography （HPLC）, capillary electrophoresis （CE）, total organic carbon （TOC） measurements and the determination of chemical oxygen demand （COD）. Clear correlations be- tween the results obtained from these multiple measurements were found, and a kinetic pathway for the degradation process was pro- posed. Within 150 min of solar irradiation, the TOC of a 10 ppm phenol solution in water was reduced by 95%-99%, thus demon- strating that SnO2：Gd nanoparticles are efficient visible light photocatalysts.

关键词： rare earth dopants solar irradiation phenol photo-degradation tin dioxide nanoparticles organic by-products

Characterization and physicochemical aspects of novel cellulose-based layered double hydroxide nanocomposite for removal of antimony and fluoride from aqueous solution

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Journal of Environmental Sciences 2021年第4期33卷 301-315页

作者： Hanen Bessaies Sidra Iftekhar Muhammad Bilal Asif Jamel Kheriji Chaker Necibi mika sillanpää Bechir Hamrouni Laboratory of Desalination and Water Treatment LR19ES01 Faculty of Sciences of TunisTunis El Manar UniversityEl Manar I 2092Tunisia Department of Environmental Engineering University of Engineering and Technology TaxilaTaxila 47050Pakistan Department of Applied Physics University of Eastern FinlandKuopio 70210Finland A lnstitute of Environmental Engineering and Nano-Technology Tsinghua Shezhen International Graduate SchoolTsinghua UniversityShenzhen 518055China International Water Research Institute Mohammed VI Polythechnic UniversityGreen City Ben Guerir 43150Morocco Institute of Research and Development Duy Tan UniversityDa Nang 550000Vietnam Faculty of Environment and Chemical Engineering Duy Tan UniversityDa Nang 550000Vietnam School of Civil Engineering and Surveying Faculty of HealthEngineering and SciencesUniversity of Southern QueenslandWest StreetToowoombaQLD 4350Australia Department of Chemical Engineering School of MiningMetallurgy and Chemical EngineeringUniversity of JohannesburgDoornfontein 2028South Africa

A series of novel adsorbents composed of cellulose(CL)with Ca/Al layered double hydroxide(CC_(x)A;where x represent the Ca/Al molar ratio)were prepared for the adsorption of antimony(Sb(V))and fluoride(F^(-))ions from aqueous *** CC_(x)A was characterized by Fourier-transform infrared spectroscopy(FTIR),Brunauer–Emmett–Teller(BET),elemental analysis(CHNS/O),thermogravimetric analysis(TGA-DTA),zeta potential,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy with energy dispersive Xray spectroscopy(SEM-EDX)*** effects of varying parameters such as dose,pH,contact time,temperature and initial concentration on the adsorption process were *** to the obtained results,the adsorption processes were described by a pseudo-second-order kinetic *** adsorption isotherm model provided the best fit for the experimental data and was used to describe isotherm *** maximum adsorption capacity was found to be 77.2 and 63.1 mg/g for Sb(V)and F^(-),respectively by CC_(3)A(experimental conditions:pH 5.5,time 60 min,dose 15 mg/10 mL,temperature 298 K).The CC_(3)A nanocomposite was able to reduce the Sb(V)and F^(-)ions concentration in synthetic solution to lower than 6μg/L and 1.5 mg/L,respectively,which are maximum contaminant levels of these elements in drinking water according to WHO guidelines.

关键词： Layered double hydroxide Adsorption Antimony removal Fluoride removal Kinetics

Measuring Impact of Lean Manufacturing Tools for Continuous Improvement on Economic Sustainability

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Journal of Systems Science and Systems Engineering 2024年第4期33卷 452-474页

作者： Luis Javier Márquez Figueroa Jorge Luis García-Alcaraz Ahmed I.Osman Alfonso Jesús Gil López Yashar Aryanfar mika sillanpää Mamdouh El Haj Assad Department of Electrical Engineering and Computer Science Universidad Autónoma de Ciudad JuárezCiudad JuárezChihuahuaMéxico Department of Industrial Engineering and Manufacturing Universidad Autónoma de Ciudad JuárezCiudad JuárezChihuahuaMéxico School of Chemistry and Chemical Engineering Queens UniversityBelfastNorthern IrelandUK Department of Economic and Managerial Sciences University of La RiojaLa RiojaSpain Department of Chemical Engineering University of JohannesburgJohannesburgSouth Africa Department of Sustainable and Renewable Energy Engineering University of SharjahSharjahUAE

Using Lean Manufacturing(LM)tools in production processes is crucial for companies’economic,environmental,and social sustainability *** study shows a structural equation model(SEM)that shows the relationship between LM Tools like Kaizen(KAI),Gemba(GEM),Value Stream Mapping(VSM)and Key Performance Indicator(KPI)with Economic Sustainability(ECS).Seven hypotheses were evaluated with data from 179 responses to a questionnaire about the Mexican maquiladora industry,showing that these variables are *** a 95%confidence level,the model was evaluated using the partial least squares *** findings indicate that the relationships between KAI and GEM and KAI and VSM have the strongest relationship,followed by VSM and ECS;however,VSM has the strongest effect on *** on these findings,it is recommended that managers adopt a continuous improvement(KAI)approach based on working directly on the shop floor(GEM and VSM)to support their decisions regarding economic growth(ECS).

关键词： Lean manufacturing economic sustainability structural equation model quality improvement

Seasonal variations of organic carbon and nitrogen in the upper basins of Yangtze and Yellow Rivers

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Journal of Mountain Science 2017年第8期14卷 1577-1590页

作者： LI Xiang-ying DING Yong-jian HAN Tian-ding XU Jian-zhong KANG Shi-chang WU Qing-bai mika sillanp?? YU Zhong-bo YU Cong-rong College of Hydrology and Water Resources/State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences Laboratory of Green Chemistry School of Engineering ScienceLappeenranta University of Technology Department of Civil and Environmental Engineering Florida International University

The profound impacts exerted by climate warming on the Tibetan Plateau have been documented extensively, but the biogeochemical responses remain poorly understood. This study was aimed at seasonal variations of total organic carbon(TOC) and total organic nitrogen(TON) in stream water at two gauging sections(TTH, ZMD) in the upper basin of Yangtze River(UBYA) and at fourgauging sections(HHY, JM, JG, TNH) in the upper basin of Yellow River(UBYE) in 2013. Results showed that concentrations of TON exhibit higher values in spring and winter and lower values in summer. TOC exhibits higher concentrations in spring or early summer and lower concentrations in autumn or winter. Seasonal variations of TOC and TON fluxes are dominated by water flux. In total, the UBYE and UBYA delivers 55,435 tons C of organic carbon and 9,872 tons N of organic nitrogen to downstream ecosystems in 2013. Although the combined flux ofTOC from UBYA and UBYE is far lower than those from large rivers, their combined yields is higher than, or comparable with, those from some large rivers(e.g. Nile, Orange, Columbia), implying that organic carbon from the Tibetan Plateau may exert a potentially influence on regional and/or global carbon cycles in future warming climate.

关键词： Seasonal variation Total organic carbon(TOC) Total organic nitrogen(TON) Yangtze River Yellow River

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用电动纠正法去除土壤中重金属研究

中国水土保持 2002年第7期 20-21页

作者： mika sillanp  Jurate Virkutyte University of Oulu Water Resources and Environmental Engineering laboratoryUniversity of OuluWater Resources and Environmental Engineering laboratoryTutkijantie I F2Linnanmaa PL430090014 OuluFinland90401OuluFinland

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用电动纠正法去除土壤中重金属研究

中国水土保持 2002年第7期 24-25页

作者： mika sillanp ,Jurate Virkutyte University of Oulu Water Resources and Environmental Engineering laboratory University of Oulu Water Resources and Environmental Engineering laboratory Tutkijantie I F2 Linnanmaa PL430090014 Oulu Finland 90401Oulu Finland

Synthesis of novel adsorbent by intercalation of biopolymer in LDH for the removal of arsenic from synthetic and natural water

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Journal of Environmental Sciences 2020年第5期32卷 246-261页

作者： Hanen Bessaies Sidra Iftekhar Bhairavi Doshi Jamel Kheriji Mohamed Chaker Ncibi Varsha Srivastava mika sillanpaa Bechir Hamrouni Laboratory of Desalination and Water Treatement LR19ES01 Faculty of Sciences of TunisTunis El Manar University2092El Manar ITunisia Department of Separation Science Lappeenranta-Lahti University of Technology(LUT)Sammonfeatu 12FI-50130MikkeliFinland International Water Research Institute MohammedⅥPolytechnic UniversityCity Ben Guerir 43150Morocco Department of Civil and Environmental Engineering Florida International UniversityMiamiFL 33174USA Department of Environmental Engineering University of Engineering and TechnologyTaxilaPakistan

This study focuses on the synthesis of nanocomposites named CCA and CZA that were prepared by the incorporation of cellulose(CL)in the Ca/Al and Zn/Al layered double hydroxide(LDH),*** materials were then used for the uptake of As(Ⅲ)and As(V)from aqueous *** of both nanocomposites(CCA and CZA)was done using FTIR and Raman analysis to identify the functional groups,N2 adsorption-desorption isotherms to determine the specific surface area and pore geometry and XPS analysis to obtain the surface atomic *** other characters were investigated using simultaneous TGA and DTA and elemental chemical analysis(CHNS/O).The crystallinity of the prepared nanocomposites was displayed by XRD ***,the sheet-like structure of the LDHs and the irregularity of surface morphology with porous structure were observed by TEM and SEM *** of maximum adsorption capacity was adjusted using different parameters including pH,contact time and adsorbent *** pseudo-second-order model was in good fitting with kinetics *** adsorption isotherm results showed that CZA exhibits better adsorption capacity for As(Ⅲ)than CCA and the Langmuir isotherm model described the data well for both *** studies illustrated the endothermic nature of CCA and exothermic nature on CZA,as well as the fact that the adsorption process is spontaneous.A real water sample collected from well located in Gabes(Tunisia),has also been *** obtained experimental results were confirmed that these sorbents are efficient for the treatment of hazardous toxic species such as.

关键词： Layered double hydroxide Adsorption Arsenic removal Kinetics Natural water treatment

光驱高级氧化技术在新兴污染物零排放中的应用现状与挑战

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Engineering 2023年第4期23卷 19-23页

作者：王大伟 Allyson L.Junker mika sillanpää 蒋一兰魏宗苏 Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education College of EnvironmentHohai UniversityNanjing 210098China Centre for Water Technology(WATEC)&Department of Biological and Chemical Engineering Aarhus UniversityAarhus 8000Denmark

*** There is a pressing need to transition into a sustainable society,committed to achieving zero ***,humanity’s most precious resource,can galvanize the environmental,social,and economic transformations called for in the European Union(EU)Green *** water use and protection are essential components for addressing the global climate and biodiversity *** achieve the goal of zero pollution,investment is required and specific policies need to be implemented to address certain contaminants of emerging concern(CECs),such as endocrinedisrupting chemicals,pharmaceuticals,and microplastics;this is particularly pertinent given that conventional wastewater treatment is ineffective in dealing with these pollutants[1-4].As such,innovative solutions that facilitate the transition into processes with zero pollution discharges are highly desirable.

关键词： pollution pollution wastewater

Estimating interaction between surface water and groundwater in a permafrost region of the northern Tibetan Plateau using heat tracing method

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Research in Cold and Arid Regions 2020年第2期12卷 71-82页

作者： TanGuang Gao Jie Liu TingJun Zhang ShiChang Kang ChuanKun Liu ShuFa Wang mika sillanpaa YuLan Zhang Key Laboratory of Western China's Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhouGansu 730000China Institute of Water Sciences College of EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China Department of Civil and Environmental Engineering Florida International University Miami FL 33199USA

Understanding the interaction between groundwater and surface water in permafrost regions is essential to study flood frequencies and river water quality, especially in the high latitude/altitude basins. The application of heat tracing method,based on oscillating streambed temperature signals, is a promising geophysical method for identifying and quantifying the interaction between groundwater and surface water. Analytical analysis based on a one-dimensional convective-conductive heat transport equation combined with the fiber-optic distributed temperature sensing method was applied on a streambed of a mountainous permafrost region in the Yeniugou Basin, located in the upper Heihe River on the northern Tibetan Plateau. The results indicated that low connectivity existed between the stream and groundwater in permafrost *** interaction between surface water and groundwater increased with the thawing of the active layer. This study demonstrates that the heat tracing method can be applied to study surface water-groundwater interaction over temporal and spatial scales in permafrost regions.

关键词： surface water groundwater permafrost heat tracing method Tibetan Plateau