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  • 1
    Online Resource
    Online Resource
    Modified Grey Model for Estimating Traffic Tunnel Air Quality
    Springer Science and Business Media LLC ; 2007
    In:  Environmental Monitoring and Assessment Vol. 132, No. 1-3 ( 2007-9), p. 351-364
    Details
    In: Environmental Monitoring and Assessment, Springer Science and Business Media LLC, Vol. 132, No. 1-3 ( 2007-9), p. 351-364
    Type of Medium: Online Resource
    ISSN: 0167-6369 , 1573-2959
    URL: Article
    DOI: 10.1007/s10661-006-9539-4
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2007
    detail.hit.zdb_id: 2012242-1
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  • 2
    Online Resource
    Online Resource
    Individual Fit Testing of Hearing-Protection Devices Based on Microphones in Real Ears among Workers in Industries with High-Noise-Level Manufacturing
    MDPI AG ; 2020
    In:  International Journal of Environmental Research and Public Health Vol. 17, No. 9 ( 2020-05-06), p. 3242-
    Details
    In: International Journal of Environmental Research and Public Health, MDPI AG, Vol. 17, No. 9 ( 2020-05-06), p. 3242-
    Abstract: Hearing-protection devices (HPDs) are particularly important in protecting the hearing of workers. The aim of this study was to prevent hearing damage in workplaces in Taiwan. It was conducted to determine the actual sound attenuation of the personal attenuation rating (PAR) values when wearing HPDs via measurements from field microphones in workers’ real ears (F-MIRE). Across 105 measurement trials for the Classic™ roll-down foam earplug HPDs worn by the workers, there were 23 cases of ineffective protection (including caution and fail); the proportion was 20% (including the first measurement and re-wear of HPDs after education and training). In addition, re-education and training in how to wear the HPDs was provided, improving wearing skills. A total of 29 testees wearing the Classic™ roll-down foam earplug HPDs failed to meet the pass standard for the first PAR test, and 6 of them improved and subsequently passed the PAR test. The improvement rate was 20%. These 23 testees switched to another HPD, namely Kneading-Free Push-Ins™ earplugs. From this group, 16 effective sound attenuation values were obtained, with an improvement rate of 70%. However, seven testees failed to pass the PAR test, and after education, training, and replacement of HPDs with different types, they still could not pass the PAR test. At that time, even if the UltraFit™ pre-molded earplugs were adopted again for wear and replacement, they were still unable to pass the PAR test. This HPD was eventually replaced with the PELTOR X4A Earmuff HPD and then tested again, with these HPDs finally passing the PAR test. In Taiwan, the use of fit testing has been increasing but it is not a common practice, and few studies on hearing-protection fit testing have been conducted in this country. The goal of this study was to gain more insight into the current hearing protection situation, including field attenuation of HPDs obtained by workers, the effects of training on improving the attenuation of HPDs after F-MIRE measurements, and the awareness of hearing health and motivation on the use of HPDs in a high-noise-level environment.
    Type of Medium: Online Resource
    ISSN: 1660-4601
    URL: Article
    DOI: 10.3390/ijerph17093242
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2175195-X
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  • 3
    Online Resource
    Online Resource
    Using experimental design for the screening and optimization of key factors on silica particles adsorption using magnetic nanoparticles – a case study of chemical mechanical polishing wastewater treatment
    IWA Publishing ; 2017
    In:  Water Practice and Technology Vol. 12, No. 3 ( 2017-08-01), p. 647-659
    Details
    In: Water Practice and Technology, IWA Publishing, Vol. 12, No. 3 ( 2017-08-01), p. 647-659
    Abstract: This study applied magnetic nanoparticles (MNPs) to chemical mechanical polishing wastewater treatment using experimental design (Plackett–Burman methods) to select the key factors among pH, mixing, Polyaluminum chloride dosage, settling time, MNPs dosage, and temperature and using response surface methodology (RSM) to determine the optimal values of key factors. Research results showed that the key factors influencing processing performance were pH and rpm, and the optimal conditions were a pH of 4.9 and rpm of 68. The turbidity removal rate through RSM simulation was 90%; under this parameter, the actual turbidity removal rate in the experiment was 89%, which was extremely close to the simulation value; this value was also much higher than the nonoptimized removal rate of 61 ± 8%. Additionally, in the subsequent regeneration and reuse experiment involving mixing and ultrasound for desorption and regeneration, the number of recoveries were 4 and 5, respectively. The study showed that the average particle size of MNPs following ultrasonic vibration was reduced; the effect was optimal at 23 to 15 nm. Therefore, a removal rate of over 80% could be maintained for the fifth ultrasonic regeneration, and the energy of the mixing method may not have been sufficient, causing incomplete desorption and a turbidity removal rate of only 71%.
    Type of Medium: Online Resource
    ISSN: 1751-231X
    URL: Article
    DOI: 10.2166/wpt.2017.068
    Language: English
    Publisher: IWA Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 2495042-7
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  • 4
    Online Resource
    Online Resource
    Application of Fuzzy Multi-Objective Programming to Regional Sewer System Planning
    MDPI AG ; 2023
    In:  Processes Vol. 11, No. 1 ( 2023-01-06), p. 183-
    Details
    In: Processes, MDPI AG, Vol. 11, No. 1 ( 2023-01-06), p. 183-
    Abstract: Planning of sewer systems typically involves limitations and problems, regardless of whether traditional planning methods or optimization models are used. Such problems include non-quantifiability, fuzzy objectives, and uncertainties in decision-making variables which are commonly applied in the planning of any process. Particularly, uncertainties have prevented the inclusion of these variables in models. Consequently, the theoretical optional solution of the mathematical models is not the true optimum solution to practical problems. In this study, to solve the above problems for regional sewer system planning, multi-objective programming (MOP), nonlinear programming, mixed-integer programming, and compromise fuzzy programming were used. The objectives of this study were two-fold: (1) determination of the necessary decision-making variables or parameters, such as the optimum number of plants, piping layout, size of the plant, and extent of treatment; (2) establishment of a framework and methodology for optimal planning for designing a regional sewer system, matching demanded targets with the lowest cost, which would achieve the aim of lower space and energy requirements as well as consumption and high treatment efficiency for the purpose of meeting effluent standards. The findings of this study revealed that individual regional sewage treatment plants could be merged to form a centralized system. Land acquisition was difficult; thus, reducing the number of plants was required. Therefore, the compromise-fuzzy-based MOP method could effectively be used to build a regional sewer system plan, and the amount of in-plant establishment reached its maximized value with a minimized cost.
    Type of Medium: Online Resource
    ISSN: 2227-9717
    URL: Article
    DOI: 10.3390/pr11010183
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2720994-5
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  • 5
    Online Resource
    Online Resource
    Bibliometric analysis of carbon dioxide reduction research trends during 1999–2009
    Elsevier BV ; 2012
    In:  Separation and Purification Technology Vol. 94 ( 2012-6), p. 87-91
    Details
    In: Separation and Purification Technology, Elsevier BV, Vol. 94 ( 2012-6), p. 87-91
    Type of Medium: Online Resource
    ISSN: 1383-5866
    URL: Article
    DOI: 10.1016/j.seppur.2011.07.022
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2012
    detail.hit.zdb_id: 2022535-0
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  • 6
    Online Resource
    Online Resource
    Applications of the Taguchi Method for Key Parameter Screening in Electrodialysis Reversal Used for High Salinity Wastewater
    Wiley ; 2014
    In:  CLEAN – Soil, Air, Water Vol. 42, No. 12 ( 2014-12), p. 1751-1758
    Details
    In: CLEAN – Soil, Air, Water, Wiley, Vol. 42, No. 12 ( 2014-12), p. 1751-1758
    Abstract: Simulation tests were employed in the treatment of wastewater from seawater that was received from a specific power plant via flue gas desulfurization (FGD) for wastewater purification in this study. After water quality and compound variation were confirmed, a simulation was conducted to investigate the efficacy of pre‐processing on the elimination of the majority of pollutants, like suspended solids, calcium ions, and magnesium ions. A mini scale electrodialysis reversal (EDR) mold plant was used to eliminate target pollutants, including sulfate and chloride ions. The Taguchi method was used to determine the optimal operating conditions that applied to various operating parameters, including temperature, flow rate, voltage, and current durations of power supply, to obtain the optimal operating parameters through analysis of variance (Minitab 14.0) simulation. After the simulations, the optimal parameters in the EDR process were used to demonstrate the removal efficiency of chloride, sulfate, and conductivity following treatment by EDR. The optimal operating parameters of the Taguchi method were 1 V (voltage), 3 L min −1 (flow rate), 15°C (temperature), 30 min (duration of power on), and 2 min (duration of power off). Combining the Taguchi method with the EDR process on wastewater treatment not only decreased initial conductivity from 4860 to 450 µS cm −1 , but also alleviated concentrations of sulfate and chloride ions.
    Type of Medium: Online Resource
    ISSN: 1863-0650 , 1863-0669
    URL: Issue
    URL: Article
    DOI: 10.1002/clen.v42.12
    DOI: 10.1002/clen.201300169
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2270984-8
    detail.hit.zdb_id: 2271097-8
    SSG: 13
    SSG: 14
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  • 7
    Online Resource
    Online Resource
    Soybean Oil Biodegradation Using Pseudomonas aeruginosa Attached on Porous Ceramic or Polyurethane
    Springer Science and Business Media LLC ; 2013
    In:  Arabian Journal for Science and Engineering Vol. 38, No. 5 ( 2013-5), p. 1025-1030
    Details
    In: Arabian Journal for Science and Engineering, Springer Science and Business Media LLC, Vol. 38, No. 5 ( 2013-5), p. 1025-1030
    Type of Medium: Online Resource
    ISSN: 1319-8025 , 2191-4281
    URL: Article
    DOI: 10.1007/s13369-012-0344-9
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2013
    detail.hit.zdb_id: 2613699-5
    detail.hit.zdb_id: 2565741-0
    detail.hit.zdb_id: 2471504-9
    detail.hit.zdb_id: 2613713-6
    SSG: 11
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  • 8
    Online Resource
    Online Resource
    Utilizing magnetic nanoparticles embedded into polyvinyl alcohol and sodium alginate for the absorption of arsenic
    Elsevier BV ; 2024
    In:  Journal of Loss Prevention in the Process Industries ( 2024-5), p. 105348-
    Details
    In: Journal of Loss Prevention in the Process Industries, Elsevier BV, ( 2024-5), p. 105348-
    Type of Medium: Online Resource
    ISSN: 0950-4230
    URL: Article
    DOI: 10.1016/j.jlp.2024.105348
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2024
    detail.hit.zdb_id: 2020695-1
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  • 9
    Online Resource
    Online Resource
    Magnetophoretic Harvesting of Nannochloropsis oculata Using Iron Oxide Immobilized Beads
    MDPI AG ; 2020
    In:  Water Vol. 12, No. 1 ( 2020-01-15), p. 236-
    Details
    In: Water, MDPI AG, Vol. 12, No. 1 ( 2020-01-15), p. 236-
    Abstract: In this work, the harvesting of Nannochloropsis oculata microalgae through the use of nanosized Fe3O4 immobilized in polyvinyl alcohol (PVA)/sodium alginate (SA) as a flocculant (Fe3O4/PS) is investigated. Using the Fe3O4/PS immobilized beads could reduce the amount of soluble ferrous ions (Fe2+) released from naked Fe3O4 in acid treatment, leading to easy recovery. The characterization was performed under different dosages and pH values of Fe3O4/PS. The results show that the Fe3O4/PS, when applied to the algae culture (500 mg dry cell weight/L), achieves a 96% harvesting efficiency under conditions of a pH of 4 with 200 mT magnetic field intensity. Fe3O4/PS can be directly reused without adjusting the pH value. The recycled Fe3O4/PS shows stability in terms of its surface properties, maintaining more than 80% harvesting efficiency after five recycles. Magnetophoretic harvesting, using immobilized magnetic iron oxide as a particle-based flocculant, is a potential method to reduce challenges related to the cost-effective microalgae-harvesting method.
    Type of Medium: Online Resource
    ISSN: 2073-4441
    URL: Article
    DOI: 10.3390/w12010236
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2521238-2
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  • 10
    Online Resource
    Online Resource
    A Sewer Dynamic Model for Simulating Reaction Rates of Different Compounds in Urban Sewer Pipe
    MDPI AG ; 2021
    In:  Water Vol. 13, No. 11 ( 2021-06-03), p. 1580-
    Details
    In: Water, MDPI AG, Vol. 13, No. 11 ( 2021-06-03), p. 1580-
    Abstract: A sewer dynamic model (SDM), an innovative use of combined models, was established to describe the reactions of compounds in a pilot sewer pipe. The set of ordinary differential equations in the SDM was solved simultaneously using the fourth-order Runge–Kutta algorithm. The SDM was validated by calculating the consistency between the simulation and observation values. After the SDM was validated, the reaction rate was analyzed. For heterotrophs in the water phase and biofilm, their growth rates were greater than the organism decay rate. For ammonia, the supply rate was greater than the consumption rate at the initial time, but the supply rate was smaller than the consumption rate from the 3rd hour. The supply rate was smaller than the consumption rate for the other six compounds. The supply rate of oxygen was smaller than the consumption rate before the 4th hour because of the microorganism activities, and, subsequently, the supply rate was greater than the consumption rate after the 4th hour because of reaeration. The results of this study provide an insight into the reaction rates of different compounds in urban sewer pipes and an urban water network modeling reference for policymaking and regulation.
    Type of Medium: Online Resource
    ISSN: 2073-4441
    URL: Article
    DOI: 10.3390/w13111580
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2521238-2
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