Proceedings of the 5th World Congress on New Technologies最新文献

{"title":"First Report of Field Remediation of Contaminated Tailings from the Collapsed Fundão Dam in Brazil","authors":"M. Scotti, S. Avila, L. Mendes, Tomás J Lacerda, S. Silva, Arthur Antão, Alessandra R Gomes, Mirelli B Medeiros, Stael Alvarenga, C. H. Santos, E. Rigobelo","doi":"10.11159/ICEPR19.163","DOIUrl":"https://doi.org/10.11159/ICEPR19.163","url":null,"abstract":"The failure of the Fundão dam in Brazil spilled contaminated sediments to the Doce river basin with high levels of pH,ether-amine and sodium. In the present study, it was established a riparian forest over contaminated sediment using two main remediation strategies: phytoremediation with native species to the Atlantic Forest, previously selected for tolerance to the sediment toxicity, and physico-chemical remediation by management of the sediment with incorporation of OM. In the experimental site (ES), 12 native species were cultivated under two treatments: T1management of the sediments with incorporation of OM and T2nonmanaged sediment + superficial deposition of OM. The results were compared with a degraded site (DS) affected by the contaminated sediments and a preserved site (PS) composed of a fragment of preserved Atlantic Forest. After 6 month of transplanting, plants from T1 showed a better height growth performance (up to 3m) and survival index in relation to T2, as well as a significant decline of etheramine and sodium contents. Besides the improvement of soil fertility, the amendment with OM promoted a pH reduction, favoring ether-amine destabilization, sodium sequestration and improvement of soil microbial populations. Soil nitrification was improved as revealed by the significant increase of nitrate which seems to have favoured the rampant growth of tolerant plant species after 6 months of planting. Therefore, it is recommended the incorporation of OM to the sediment and phytoremediation with selected tolerant species to remediate sodium and ether-amine toxicity.","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133079104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic Layer Deposition of High-k Films on Graphene Surface","authors":"Hyeok Jae Lee, Kangtaek Lee, Sang Woon Lee","doi":"10.11159/ICNFA19.136","DOIUrl":"https://doi.org/10.11159/ICNFA19.136","url":null,"abstract":"Extended Abstract Graphene has received considerable attentions because of its unique band structure and high electron mobility (>20,000 cm/Vs). Especially, the electronic characteristics of graphene is suitable as a channel material for the high performance metal-oxide-semiconductor field effect transistor. A growth of high-k film is necessary on graphene surface for top-gated graphene transistor.[1] However, graphene has no surface functional groups such as hydroxyl groups (-OH group) except for defects and graphene edges, which caused a failure of high-k film deposition on graphene surface even using state-of-the-art thin film deposition technique, i. e., atomic layer deposition (ALD). Thus, various methods were proposed to deposit dielectric films uniformly on graphene. For example, a growth of dielectric thin film by oxidation treatment after forming a metal seed layer using physical vapor deposition (PVD). In addition, a use of perylene-tetracarboxylic acid (PTCA), and preH2O treatment were attempted. Unfortunately, impurities such as the perylene molecules remain on the graphene surface and the pre-H2O treatment and post-oxidation treatment become somewhat complicated.[2, 3] In the meantime, enhancement of nucleation sites on graphene surface using ozone degraded the chemical state of graphene because of a defect formation on the graphene.[4] However, the chemical and electrical properties of the graphene must be preserved after the growth of highk films.[5] Here, we propose a novel graphene surface treatment method that allows an enhanced nucleation and growth of high-k thin films by ALD via a graphene surface treatment using trimethylaluminum (TMA) and H2O prior to the deposition of HfO2 film on the graphene. Then, high-k thin films such as Al2O3 and HfO2 were deposited on the surface-treated graphene sample using ALD. These graphene surface treatment methods generate Al2O3 nuclei through physical adsorption on the surface of graphene, which enhanced the growth and nucleation of high-k film through ALD on the graphene surface. As a result, additional defects were not created after surface treatment on graphene and HfO2 ALD. And significant amount of Hf-C bond was observed after HfO2 ALD, which was decreased substantially with surface treatment. Nucleation delay in HfO2 ALD decreases from 70 to 10 ALD cycles with graphene surface treatment and dielectric constant of HfO2 film is higher using the surface treatment (k ~14.5) than that without the surface treatment (k ~5.6). Also, a leakage current (with a capacitor fabrication) was decreased by a factor of 10 compared to without surface treatment. The graphene surface treatment method enhanced the nucleation and the electrical properties of the HfO2 film without deteriorating the properties of graphene, thus providing promising opportunities in graphene electronics.","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"97 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131263558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioremediation of Silver and Recovery of AgNPs for the Fabrication of AgNPs Functionalized Antibacterial Polycaprolactone Membrane","authors":"F. Ahmad, Noreen Ashraf, Yin Dachuan","doi":"10.11159/ICNFA19.113","DOIUrl":"https://doi.org/10.11159/ICNFA19.113","url":null,"abstract":"Extended Abstract Heavy metals denote a group of hazardous environmental contaminants due to their toxic effects on human health in concentrations higher than the permissible limits which cause widespread concerns [1]. Silver is a precious as well as toxic heavy metal; hence, its remediation and recovery are essential for environmental sustainability and biomedical applications. So far, conventional methods, i.e., precipitation, coagulation, and ion exchange are less efficient at low metal concentrations and expensive in comparison with bioremediation of heavy metal pollutants. Therefore, the isolation of heavy metal resistant bacteria from metal contaminated sites and their use for the remediation and recovery of metals is documented [2, 3]. However, there are very few or no reports of simultaneous remediation and recovery of silver in the form of silver nanoparticles (AgNPs). Due to the chemical stability, bactericidal and optical properties of AgNPs, they are widely used in many biomedical and environmental applications [4]. In this study, we have isolated three potential bacterial strains from silver mining site (Zhashui, Shaanxi Province, China) for their potential use in silver remediation and its recovery in the form of AgNPs. The synthesized biogenic AgNPs were characterized and utilized to fabricate antibacterial membrane filter using nanofibers of polycaprolactone (PCL) functionalized with AgNPs by dissolved electrospinning method for their potential use in biomedical filtration devices. The novel bacterial strains were isolated from soil and water showing a long history of silver contamination and identified using restriction fragment length polymorphism, and through 16S DNA sequencing followed by NCBI Blast analysis. Based on preliminary experimental results, one (SMP1) out of three bacterial strains was selected for further studies. The detection and quantification of silver removal and recovery of AgNPs from spiked aqueous medium were measured by using atomic absorption spectroscopy (AAS). Synthesized AgNPs were purified through centrifugation and by the application of external voltage directly from the reaction mixture. Biogenic AgNPs were characterized by using UVspectrophotometer, dynamic light scattering (DLS), SEM and TEM. Diethyl ether was used to dissolve PCL followed by mixing of AgNPs to prepare AgNPs and PCL (AgNPs-PCL) composite, and an antibacterial AgNPs-PCL filter membrane was fabricated by using electrospinning technique. Disc diffusion method was used to access the antibacterial potential of the developed membrane filter. Results obtained showed that potentially all three isolated bacterial strains identified as Enterobacter cloacae (SMP1), Cupriavidus necator (SMP2), and Bacillus megaterium (SMP3) were highly efficient with more than 95% silver remediation efficiency. However, SMP1 was selected for further studies based on its quick and highest remediation of silver as well as high efficiency of AgNPs recovery. The ","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"10 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131858912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sewage Water as Resources for Green Energy by Using Hydro Turbines, Pumped Energy Storage, Waste and Bio Systems","authors":"R. Glick","doi":"10.11159/ICEPR19.186","DOIUrl":"https://doi.org/10.11159/ICEPR19.186","url":null,"abstract":"","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115343813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation the Antimicrobial Activity of LDPE Nanocomposites Based on TiO2 Nanostructure for Food Packaging Applications","authors":"Nasser A Al-Tayya, A. M. Youssef, R. Al-Hindi","doi":"10.11159/ICNFA19.122","DOIUrl":"https://doi.org/10.11159/ICNFA19.122","url":null,"abstract":"Extended Abstract This work aims to prepare and characterize novel nanocomposite materials based on low density polyethylene (LDPE) and titanium dioxide (TiO2) nanostructure for food packaging applications. The fabricated nanocomposites films were examined by X-ray diffraction pattern (XRD) and mechanical properties. The XRD results confirmed that the formation of LDPE nanocomposites films containing different concentrations of TiO2 nanostructure. The mechanical properties of the prepared LDPE/TiO2 nanocomposites were investigated. Moreover, the thermal properties of the prepared films displayed that the good enhancement of the thermal stability of the prepared film after addition of TiO2 nanostructure. Furthermore, the permeability of oxygen transmission rate (GTR) and water vapor transmission rate (WVTR) of the prepared LDPE nanocomposites were evaluated. Moreover, the antimicrobial activity of the prepared films against gram positive (Staphylococcus aureus) bacteria and gram negative (Pseudomonas aeruginosa) bacteria were investigated.","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129697298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Synthesis of Renewable Hydrocarbons from Vegetable Oil Feedstock In The Presence Of Ni-Supported Catalysts","authors":"K. Malins","doi":"10.11159/ICERT19.117","DOIUrl":"https://doi.org/10.11159/ICERT19.117","url":null,"abstract":"The effects of commercial Ni65%/SiO2-Al2O3 and prepared Ni10%/SiO2-Al2O3-135I Ni-supported catalysts and their amount (1.5-10%) on hydrocarbon production from rapeseed oil/it fatty acid (RO/RFA, weight ratio 1/1) feedstock were investigated. The textural properties of catalysts were characterized by N2 sorption analysis and active metal loading by XRF. The activity of catalysts was evaluated by minimum oxygen removal reaction time determined from pressure-time profiles at studied operating temperature 340 oC and initial H2 pressure of 100 bar. GC analysis of obtained hydrocarbon mixtures was used for determination of dominant hydrocarbon n-pentadecane, n-hexadecane, n-heptadecane and n-octadecane composition. Both catalyst have proper activity for complete conversion of RO/RFA into marketable hydrocarbon mixture with high yield (76.1%-83.2%), calorific value (47.20-47.24 MJ/kg) and energy recovery (ER) (90.7%-99.1%) produced at residence time ~35-52 min. Ni65%/SiO2Al2O3 has higher activity, but Ni10%/SiO2-Al2O3-135I deliver elevated yield of hydrocarbons. Both catalysts with different selectivity have a potential for practical application in hydrotreated vegetable oil production processes.","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127386584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inoculation of Soil Cyanobacteria Improves Fertility of a Soil Mixed With Copper Tailing Sands","authors":"C. Ortiz, Uro Ledesma, Darlyng Pontigo","doi":"10.11159/ICEPR19.179","DOIUrl":"https://doi.org/10.11159/ICEPR19.179","url":null,"abstract":"Industrial activities such as mining provoke soil degradation which can be restored by applying cyanobacteria as inoculants to promote biocrust development. However, previous to the field applications, there is a need to determine the cyanobacterial suitable species under laboratory conditions. In this investigation, a culture of Trichormus sp. isolated from environmental samples was inoculated on a soil mixed with copper tailing sands. The establishment of the cyanobacteria on the substrate was determined by confocal microscopy, and germination and growth of Polypogon australis, a tailing storage facility (TSF) natural colonizer were determined. In addition, the total nitrogen content (N), phosphorus available (P) and organic matter (OM) content of the inoculated substrates was measured after 30 days. The results showed that the cyanobacterial culture increases the speed but not the cumulative germination of P. australis, and generates an increase of available P, total N and OM of the mixed soil. The improvement in soil fertility and stability of tailing sands supports the use of cyanobacteria to restore degraded or mining polluted soils.","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130068371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy Refurbishment of a School Building in Ceprano, Italy","authors":"C. Aureli, Claudia Rampini, A. D’Angelo","doi":"10.11159/ICERT19.122","DOIUrl":"https://doi.org/10.11159/ICERT19.122","url":null,"abstract":"Among the adaptation measures against the climate change, energy saving in buildings is a crucial point. Detailed analysis to keep the operation of the building as well as its architectural features when listed is required. A school is selected as case study for its age of construction and potential of replicability due to its similarities for many other schools which make it an archetype. Building envelope and energy systems are the area of intervention supported by an experimental campaign to assess the status quo. Furthermore, the design complies with minimum environmental requirements by current regulation for public buildings. For the new proposed design, the target of high-efficient building is reachable even for so constrained existing building.","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125477283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D Tailored Design as a Bioremediation Strategy for a Lagoon in Matanza-Riachuelo Basin","authors":"P. Marconi, A. Trentini, M. D. Groppa, M. Zawoznik, Carlos Nadra","doi":"10.11159/ICEPR19.121","DOIUrl":"https://doi.org/10.11159/ICEPR19.121","url":null,"abstract":"Patricia Laura Marconi, Andrea Trentini, María Daniela Groppa, Myriam Zawoznik, Carlos Nadra CONICET, CEBBAD , Univ. Maimónides, Hidalgo 775, Buenos Aires, Argentina ; marconi.patricialaura@maimonides.edu; trentini.andrea@maimonides.edu CONICET, FFyB, Universidad de Buenos Aires, Junin 954, Buenos Aires, Argentina danielagroppa@gmail.com FFyB, Universidad de Buenos Aires, Junin 954, Buenos Aires, Argentina; myriamz@ffyb.uba.ar ACUMAR Esmeralda 225, Buenos Aires, Argentina cnadra@acumar.gov.ar","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114086439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical Characterization of Landfill Leachate and Its Impact on the Receiving Natural Water-Body Surrounding the Naboro Landfill, Suva, Fiji Island","authors":"F. Mani, Esha Chetty, M. Maata, S. Chand","doi":"10.11159/ICEPR19.128","DOIUrl":"https://doi.org/10.11159/ICEPR19.128","url":null,"abstract":"","PeriodicalId":265434,"journal":{"name":"Proceedings of the 5th World Congress on New Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127776069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}